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Fondo is an all-in-one accounting platform for startups. Get your books closed, taxes filed, and cash back from the IRS.

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#110
Tuesday · 7 min
START: Zach Nieman, Founder, Snap Studio: “Unleash Your Studio - The Ultimate Portable Vocal Booth"
It started with a dream. “Guys, let’s make it to the GRAMMYs.” 18 months later, he did it. Zach Nieman’s GRAMMY-Nominated production “Cali Coast (Psionics Remix)” by Soul Pacific led him to walk the red carpet and planted the seeds for his first startup. It all began when he was recording music at home. The gear was right. The room wasn't. Zach had the interface, the cables, the mics, and the chops to lay down a real take. He hit record and realized: “It sounded like garbage.” So he built a workaround: a frame with sound absorption blankets over it, enough to kill the reverb and get a usable signal he could mix in post. He told the guys “Let’s make this album so good that we get to the GRAMMYs.” The songs they tracked inside it made that dream come true. Then he put the booth away for over a year. It took fellow GRAMMY Nominated producer Josh Williams asking “whatever happened with that booth?” to get Zach to pull it back out and think product instead of prototype. Snap Studio is the commercialized product of that vision: a 360-degree acoustic isolation shield trusted by thousands of artists, singers, and voice actors worldwide. The popular Standard and XL models break down in minutes and fit into a duffel bag, making them perfect for storage or travel. Get Rolling Stone's #1 recommended portable recording booth here: www.snapstudio.com 🎙️ Zach Nieman, CEO & Founder, Snap Studio on Fondo START 01:08 Why San Francisco became the Hollywood of startups 02:08 The thing that decides whether a take is usable, and it isn't the gear 02:50 The recording that came back unusable 03:28 From a blanket-and-frame prototype to the Grammy red carpet 03:38 The question from a friend that restarted the whole project 03:58 Launching during COVID, when nobody could get to a studio Check it out at www.snapstudio.com
#60
August 21 · 8 min
START: Varun Agarwal, Founder, Envariant "Interpretability and reasoning infra for foundation models."
Fine-tune a frontier LLM on addition and it handles one through five digits without breaking a sweat. Six digits, a friend of Varun's found performance collapsing to zero. The model had learned addition up to the length it saw in training and nothing underneath it, no rule it could extend. Varun calls it a fatal flaw, one he expects to surface in deep tech and safety-critical applications, and rather than argue about it he'd rather hand builders a way to look inside and check. You hand Envariant 50 examples where your model tells the truth and 50 where it hallucinates. It finds the surface inside the model where the difference lives, and from there you can amplify that behavior, suppress it, or trace what caused it. The same approach pulls out the principles a model has learned in a form a human can actually read, and generates the edge cases most likely to break them. Which is the part that traces straight back to biology. Varun was building foundation models to design synthetic viral genomes: DNA in, DNA out, and no way to tell what the thing had worked out about virology along the way. Figuring out how to read that back out became the company. ‍ 🎙️ Varun Agarwal, Founder, Envariant on Fondo START 02:02 An interpretability SDK for foundation model builders 02:34 Finding the right surface inside the model 02:47 Detecting hallucinations by finding internal model representations 04:00 Why scale and compute still dominate but are hitting walls 04:42 The 6-digit addition collapse and what it means for AI reasoning 06:02 Closing the gap from 95% demo to 99.99% production 07:37 From designing synthetic viral genomes to founding Envariant 08:15 thoughts on AGI Check out envariant.ai
#119
August 20 · 5 min
START: Abhinav Gopal & Darren Hsu , Co-Founders, Rubbrband "AI creative company"
Hollywood-grade storytelling, startup-speed execution. Most AI ads feel disposable. Rubbrband is betting the future looks cinematic instead. Jeremy Lee, Abhinav Gopal, and Darren Hsu: 3 CS researchers out of Berkeley who loved film built video models for Hollywood. They got good enough at cinematic content that they now do it for some of the world's top brands, and they do it without the hundreds of thousands of dollars companies have been handing traditional ad studios. Discovery call, creative brief, script, production. Start to finish in weeks, not months. With real narrative and real pacing, the kind of thing that's actually worth watching. Everyone's figured out by now that cheap AI content makes taste worth more. The brands that win won't explain their product; they'll make you feel something. Smaller teams, faster launches, higher production value than traditional headcount & budget should allow for. That's the shift rubbrband is building for. 🎙️ Abhinav Gopal & Darren Hsu, Co-Founders, Rubbrband on Fondo START pod 00:45 What Rubbrband does 01:53 From Berkeley engineers to building AI models for Hollywood 02:30 The creative process behind every launch campaign 03:14 Hollywood-quality production for startups at a fraction of the cost 03:35 Why they're determined to avoid AI slop 04:17 Why AI video adoption is still in the early innings 04:55 Hollywood's growing adoption of AI 05:20 Where to find Rubbrband ‍ Check out www.rubbrband.com
#92
August 18 · 9 min
START: Neal Patel, Founder, Producer, Comedian, Artificially Unintelligent Tech Comedy: “Tech stand up comedy shows”
You can't do a joke about the Jira board at a normal comedy club. The audience won't know what the Jira board is, and explaining it kills the laugh before you get to it. Neal Patel wanted to do that set anyway. For years he worked two jobs, software engineer during the day and stand-up three or four nights a week in New York clubs at night. Plenty of the comedians he ran into were also in tech. Backstage they'd trade jokes about tech, about Jira, and all the little things that only people in the industry found funny, and none of it really worked once they stepped in front of a normal comedy audience. So in 2024 he built the room that didn't exist yet. Artificially Unintelligent puts engineers, PMs, founders, CEOs, and VCs who happen to be experienced comedians on the same bill as comics you've seen on Netflix, Hulu, HBO, NPR, Comedy Central, and in The New York Times. Hundreds and hundreds of people signed up for the first one. Ask him how the audience got that big that fast and he'll tell you he hates the question, because the honest answer is that he doesn't know. What he does know: put on a really good event with really cool people, invest heavily in design and branding so nobody files it under "another open mic," and never spend a single dollar on advertising or marketing. The rooms fill with founders, senior operators, cracked engineers, heads of finance, and operators from across the startup ecosystem. Open bar, themed drinks, designed end to end. Keeping the shows free is part of the philosophy, and sponsors are what make that possible. Neal would rather take one sponsor check than twenty bucks each from 200 people. Which gets at why he thinks the first open mic isn't the hard one. You go up convinced you're the funniest person alive, nobody laughs, and that's survivable. The second one is where it gets decided, because that's when you have to choose whether you're doing it again. He kept choosing it. Artificially Unintelligent now runs regularly in New York with shows in San Francisco, and Neal wants to spend more time in Los Angeles and Chicago too. 🎙️ Neal Patel, Founder, Producer, Comedian, Artificially Unintelligent Tech Comedy / notsodailystandup.com on Fondo START ‍ 1:25 Doing stand-up for years, and engineering for even longer 1:53 Meeting other comedians who also worked in tech 2:09 Wanting to tell jokes straight off the Jira board 2:17 Launching the first Artificially Unintelligent show in 2024 2:21 Hundreds and hundreds of people signed up for the first show 3:24 Never spending a single dime on advertising or marketing 4:37 Why he'd rather take one sponsor check than twenty bucks from 200 different people 6:12 Why the first open mic is easy -and the second is the hardest 7:56 Using an AI transcriber to capture joke ideas in real time 8:37 Why Artificially Unintelligent doesn't have a newsletter ‍ Check out notsodailystandup.com
#134
August 14 · 10 min
START: Saksham Aggarwal, CEO & Founder, Cardboard "Agentic video editor"
Creating video is getting easier. Finishing it isn't. AI writes code and you still review it before it ships. AI makes clips now, and someone still has to assemble them into something you'd actually publish. That's the layer cofounders Saksham and Ishan are building at Cardboard. Two engineers who met in school and taught themselves filmmaking in Bangalore by studying Apple's launch films. Saksham describes Cardboard simply: it's Cursor for video editing. There's no good VS Code for video, so they're building one. You throw your clips in and give it a goal, and it hands back a first cut in minutes. Brief it the way you'd brief a junior editor. Video isn't one problem, which is what makes the editor core hard. Screen recordings need different ML pipelines than talking heads or sports footage, so a routing model decides where each query goes. They don't want to be an AI feature inside the existing editor. They want to build the editor itself. ‍🎙️ Saksham Aggarwal, CEO & Founder, Cardboard on Fondo START ‍ 00:45 The Cursor comparison, and why editing is the product 01:10 Learning filmmaking by studying and recreating Apple's launch films in Bangalore 02:30 The YC launch that reached roughly half a million views 03:15 What WebGPU and multimodal models unlocked 04:40 Why they want to own the whole editor instead of plugging into Final Cut 05:10 AI-generated clips are a new camera—and they still need editing 05:50 Why video is one of AI's hardest multimodal problems 07:00 Briefing Cardboard like a junior editor 07:40 Why they stopped selling launch videos to focus on product ‍ Check out www.usecardboard.com
#80
August 11 · 5 min
START: Jayram Palamadai, Founder & CEO, Byteport: “Transfer data on any network 10x faster”
30 petabytes of collider data. That was Jayram Palamadai's job at CERN, where he worked as a distributed computing engineer getting collider data out to physicists. At that scale you stop thinking about files and start questioning the protocol underneath them, so he designed a different architecture. That became Byteport. It's built on DART, a proprietary transport protocol developed by engineers out of CERN. TCP cuts its congestion window the moment it detects packet loss and then recovers slowly; DART holds near-constant throughput instead, roughly 98 Mbps on a 100 Mbps connection whatever the latency, jitter, or loss. In the field, Byteport has hit speeds up to 1,500× faster than TCP. It runs wherever critical infrastructure runs: on-premises, air-gapped, hybrid, cloud. And in those places a failed transfer isn't a file that shows up late. It's a training run stalled at the data-loading step, a satellite pass that comes and goes, a drone flying without the map it was supposed to have. Byteport runs in all of them. It holds up in intermittent connectivity, high latency, and contested RF. DART runs mission-critical networks spanning land, air, sea, and space. ‍🎙️ Jay Palamadai, Founder, Byteport on Fondo START ‍ 00:59 Byteport's faster file transfers 01:13 Moving 30 PB at CERN 01:24 Rethinking internet architecture 01:57 Launch day reflections 02:50 Driving to YC office hours 03:17 Getting into YC 03:45 The YC interview 04:35 What's next for Byteport ‍ Check out byteport.com
#129
August 10 · 11 min
START: Gaurav Maken, Community Partner, Pioneer Fund "500+ Y Combinator alumni investing in top Y Combinator startups"
Pioneer Fund met Gaurav Maken at Y Combinator Demo Day, and today he works there as Community Partner. What stayed with him was the way the meeting ran. The people across the table were curious rather than performing, and they wanted to understand what he was building. That's carried into how Pioneer operates now. The team preps hard for every 30-minute founder meeting, several founder-investors join each call, and they'll tell a founder what they like and what they don't, because they've sat on the other side of that table and know how it feels to leave an investor meeting with "nothing". Then they hand the evaluation back. Pioneer sends a post-meeting survey asking founders how the conversation went. Many of them say Pioneer Fund understood their business better than anyone else they met while fundraising, despite some of those founders still getting a "no". Today Pioneer is backed by more than 500 Y Combinator alumni serving as Venture Partners, with 730 portfolio companies and 1,500+ portfolio founders behind it: a network of founders who stay involved long after the investment. It's still growing. VP spots mostly come through referral. And if you don't have one, reach out to Gaurav ‍ 🎙️ Gaurav Maken, Community Partner, Pioneer Fund on Fondo START pod ‍ 01:47 — How PG's essays led him to YC 02:04 — Instacart in 2015, then a grocery startup 02:22 — What the 2020 shutdown taught him 02:52 — Starting a mental performance clinic for founders 03:10 — The Demo Day meeting 03:26 — 500+ venture partners, 1,500+ backed founders 04:50 — The prep behind every 30-minute founder call 05:59 — The survey Pioneer sends after every meeting 06:47 — Expert hours 08:13 — How Jason built a system for investors 09:36 — What it takes to become a Pioneer Fund VP ‍ Check out www.pioneerfund.vc
#81
August 7 · 10 min
START: Aram Shatakhtsyan, Founder & CEO, Modelence "Build production-ready apps with AI"
Every startup can build a demo. Then comes everything else: authentication, databases, hosting, monitoring, email, analytics, real-time infrastructure. None of it makes the demo, and every team rebuilds it anyway. Aram Shatakhtsyan spent nearly a decade scaling a startup and kept hitting the same thing. Too much engineering went into infrastructure that looked nearly identical from one product to the next. Modelence is a production-ready framework and cloud platform for the era of AI-generated software, where developers spend their time on product logic instead of rebuilding the same foundation. Generate a full-stack app from a prompt. Auth, database, and production deploys wired in from day one. Inspect, edit, and own the code. Deploy it to Modelence Cloud with production infrastructure, monitoring, scaling, and a custom domain, without assembling a stack of separate services. Prototypes are easy. Production isn't. We filmed this episode with Aram on January 23. Since then, the AI App Builder hit #2 Product of the Day on Product Hunt, and their new Mobile Builder launched in July. "Build production-ready apps with AI" ‍ 🎙️ Aram Shatakhtsyan, Co-Founder & CEO, Modelence on Fondo START pod ‍ 00:57 — The scaling challenges that inspired Modelence 01:22 — Why every startup keeps rebuilding the same infrastructure 02:01 — Why TypeScript became the foundation for AI-native development 03:06 — Building the TypeScript equivalent of Ruby on Rails 03:45 — Why infrastructure matters more than another AI app builder 04:18 — The difference between prototyping and production software 05:14 — Why today's frameworks weren't designed for AI coding agents 06:03 — Designing AI systems with guardrails instead of prompts 07:16 — The vision for production-ready AI applications 08:07 — What Aram hopes developers build with Modelence next ‍ Check out modelence.com
#94
August 6 · 13 min
START: Charu Sharma & Michael Mernagh, Co-founders, Fenrock AI: “The First AI Workspace for Banking Back Office”
99% of U.S. banks aren't JPMorgan. All of them are regulated like it. The bottleneck isn't serving customers. It's everything that happens after. Loans. Compliance. Fraud investigations. Customer operations. The work keeps growing. Headcount doesn't. JPMorgan has tens of thousands of analysts. A community bank has a handful. That's the gap Fenrock AI is closing. Fenrock is building the first AI workspace for the banking back office. Built alongside U.S. bank CEOs. Designed for banks. One workspace for all of it. AI gathers the information. Organizes the evidence. Drafts the analysis. Prepares the report. The analyst reviews. The analyst decides. No rip-and-replace. No data migration. Just an AI workspace embedded into existing workflows. Every action is documented with bullet-proof audit logs. Built-in regulatory guidance. Reporting designed for examiners and boards. An analyst clears about 10 alerts a day. Fenrock is built for 20x that. Not by replacing people. By giving them capacity they've never had. Banks process more. Pass their exams. Improve efficiency ratios. And keep serving the communities that depend on them. 🎙️ Charu Sharma & Michael Mernagh, Co-Founders, Fenrock AI on Fondo START pod 01:16 — Fenrock AI's vision: AI agents for the banking back office 01:57 — Customer discovery leads from financial crime to banking compliance 02:33 — Why small and midsize banks became the focus 03:02 — Charu's early life and the experience that shaped her resilience 03:52 — Building multiple startups before founding Fenrock 04:18 — Michael's background building privacy-preserving machine learning at Apple 05:07 — Finding the right co-founder and choosing a long-term mission 06:03 — Pivoting the company and using YC to accelerate execution 07:37 — How YC raised the team's ambition and execution speed 08:36 — Building the first AI workspace for the banking back office 09:17 — Helping small banks meet regulatory expectations with AI 10:24 — Human-in-the-loop workflows, audit trails, and early customer impact Check out fenrock.ai
#146
August 3 · 10 min
START: Chloe Sow, Co-Founder, Infera "The operating system for your laboratory”
Scientific discovery shouldn't slow down because of software. But every instrument in the lab ships its own, and someone has to learn all of them. Researchers don't want to memorize instrument interfaces. They want experiments to run. They want answers. They want data. That's the problem Infera is solving. Chloe Sow knows that side of it. Mechanical engineering at Harvard, research at Brigham and Women's, building medical devices and running the experiments by hand. Her co-founder Troy Cheng spent an entire research summer figuring out how to run his lab's experiments on one machine. That was the summer. So they built the thing they needed. Describe an experiment in plain English. Infera turns it into a validated, instrument-ready run across the equipment your lab already uses. One system for protocol logic. Vendor-specific scripts. Laboratory data. Inventory. Institutional knowledge. Today, running an experiment means going instrument by instrument. Tomorrow, one place for all of them. AI agents already design experiments and protocols. But nothing connects those designs to real laboratory instruments. One system. From intent to execution.‍ Infera: "Control lab instruments with natural language" 🎙️ Chloe Sow, Co-Founder, Infera on Fondo START pod ‍ 00:45 Claude Code for scientific instruments 01:27 Troy's entire job was one liquid handler 02:39 Every run captures a record. The missing layer between AI and instruments 03:12 Scientists pressing buttons without knowing the machine 04:22 Plain English to validated instrument-ready run. Academic labs and cores first 05:50 Every instrument ships its own closed software 06:02 Meeting at a virtual Caltech admit session 07:19 Applied to YC for feedback. Got in first try 08:35 Staying disciplined instead of chasing the SF event circuit ‍ Check out infera.bio
#117
July 31 · 12 min
START Nasrat Khalid - Founder & CEO, Aseel “Connecting artisans to global markets and enabling transparent aid”
You can track a burrito from the restaurant to your door in real time You donate to a family in a crisis zone. Usually you get a thank-you email. That's where it ends. Nasrat Khalid couldn't understand why. We expect complete visibility when we order dinner. Why not when we're helping another human being? So he built Aseel. A platform for "everything do good" You buy a food package. You see exactly who receives it. You can ask for a photo of the delivery. You can exchange messages with the recipients, if they choose to participate. Instead of donating into a system and hoping, you know the aid reached the person who needed it. That's the whole idea. No plane ticket. No project. No abstraction. "Award-winning US-based platform connecting artisans to global markets and enabling transparent aid" ‍ 🎙️ Nasrat Khalid, Founder & CEO, Aseel on Fondo START ‍ 00:45 The platform for everything do good 02:25 The first 16 years, as a refugee 02:55 Why he left institutional aid to build Aseel 03:40 Leaving Afghanistan at 16 days old 04:05 No ID means no school, no bank account 04:35 Why identity comes before food 05:15 Seven years inside the World Bank 05:58 What happened to aid in Afghanistan after 2021 07:00 AidOS, for institutions 07:40 The Uber Eats insight 08:20 The $30 package you can trace to a family 09:35 Why he joined the residency 12:30 How to get started ‍ Check out aseelapp.com
#147
July 28 · 20 min
START Sherwood Callaway, Founder & CEO, Sazabi “Observability On Autopilot”
AI changed how software gets built. The tools we use after we ship haven't caught up. Code is getting cheaper. Production is getting harder. That's the gap Sherwood Callaway saw after building with Cursor and Claude Code. AI had transformed how software gets built, but when something broke in production, he was back clicking through observability tools that hadn't kept pace. Sazabi is built for AI-native engineering teams. → Autonomous alerts with root-cause context → Conversational debugging instead of endless dashboards → AI that learns your codebase, architecture, and past incidents AI is making it easier than ever to build software. Sazabi makes it just as easy to understand what's happening in production—helping engineering teams detect issues earlier, identify the root cause faster, and get back to shipping. Observability is becoming one of the most important layers of the AI software stack. ‍ 🎙️ Sherwood Callaway, Founder & CEO, Sazabi on Fondo START pod ‍ 01:08 — Building AI-native observability for fast-moving engineering teams 01:45 — Why AI made observability a much bigger problem 02:07 — "Code is basically free" 02:36 — Why architecture and product thinking are the new bottlenecks 03:09 — "Measure twice, cut once" — how Sazabi stays focused 03:35 — History major to Dev Bootcamp: turning down investment banking 05:50 — Joining Brex at employee 70 through hypergrowth to $12B 07:10 — Starting Brex's observability team — the seed of Sazabi 07:48 — What observability actually is (it started with 1960s rocket science) 09:45 — "I will leave Brex today" — the Dalton Caldwell moment 12:16 — Building one of the first production AI agents at 11x 13:33 — The Cursor vs. Datadog contrast that sparked Sazabi ‍ Check out www.sazabi.com
#145
July 24 · 14 min
START: Cyrus Kelly, Co-Founder & CEO, tday.com “AI that turns your product into on-brand marketing content”
Your product didn't fail. No one saw it. The best product often loses Not because it's worse Because no one saw it Teams ship daily Marketing got faster too It just never stopped needing you Open the recorder. Fumble the demo. Redo it fifteen times. Edit Design Post Your flow is gone. So next time you don't bother That's how good products disappear Cyrus Kelly and co-founder David McDonough were involved in 11 startups. Every time, they became the marketing team Never once enjoyed it So they built tday Connect your GitHub repo Or point it at your product Every release becomes a demo video of the actual feature. On-brand graphics Published to your channels Ship an update and the demo updates itself Because it's tied to what your product does Not a one-time recording. Not three hours in tday instead of four hours in Canva. Minutes. Then never thinking about it again (unless you want to) The problem was never building It was that no one saw it Their mission is to make it so the best products do win. ‍ 🎙️ Cyrus Kelly, Co-Founder & CEO, Tday on Fondo START pod ‍ 00:20 — What tday does: marketing on autopilot for software companies 00:50 — Origin story: three engineers, 11 startups, always stuck doing marketing 01:35 — Why the best product doesn't always win 01:50 — Starting university at 13 02:15 — Building a student club platform with banking at 16 03:05 — The tech stack behind it 03:50 — Applying to YC four times 04:05 — Interviewing with Tom Blomfield 04:55 — How the product changed during the batch 05:35 — Not a better design tool: two minutes instead of hours 06:00 — Why repeated launches matter 06:30 — The idea of a product that records itself 06:50 — Who tday works best for 07:45 — Getting the domain 08:00 — What tday.com actually cost 08:45 — Eight months of waiting, and how the domain shaped the product 10:00 — Sam Altman offering $2 million in tokens 11:15 — Token maxing: agents running in parallel 12:20 — Where to find tday and Cyrus ‍ Check out tday.com
#71
July 23 · 6 min
START: Tarini Sai Padmanabhuni, Founder & CEO, DetectifAI “Real-time deepfake voice detection”
A phone call used to mean trust. Now it could be AI. DetectifAI is building the next layer of cybersecurity for the AI era Not another chatbot Not another AI wrapper Foundational models built to detect audio deepfakes It started with something personal. Tarini's grandfather lost thousands of dollars to a simple deepfake. That moment became the reason to build. Tarini had already been in machine learning since grade six Nearly a decade studying how AI works She saw where the technology was headed - and what was missing Fraud has existed for a very long time Cybersecurity has existed for a very long time Deepfake detection is that same discipline extended into the AI world. Today, DetectifAI serves clients across banking, finance, security, telecoms, and OEMs An API that integrates into existing enterprise infrastructure And on mobile, it goes even deeper - into the OEM layer itself. Which makes the vision tangible. You answer a call. Your phone gives you a rolling update on whether that voice is likely AI or a real human Detection during the call. Not after the money is gone. The scale comes from where it's deployed. A single OEM integration can unlock protection for millions of people. And deepfake detection is only the first step. The larger vision is an anti-fraud landscape that helps people navigate scam calls, robocalls, and anything that falls under the purview of fraud. The next generation of AI companies won't just build intelligence They'll build trust 🎙️ Tarini Padmanabhuni, CEO, DetectifAI on Fondo START pod 00:57 Founder origin story 01:18 ML background 01:42 Audio deepfake detection 01:53 Enterprise customers 02:15 Growing AI fraud 02:39 AI cybersecurity 03:16 Enterprise integration 03:29 Telecom and OEM strategy 03:46 OEM distribution vision 04:13 Real-time call detection 04:33 Broader anti-fraud vision 04:58 AWS grant journey 05:31 Building in San Francisco 05:52 Residency experience 06:15 Advice for founders Check out detectif.ai
#130
July 21 · 10 min
START: Dawson Chen, CEO & Founder, Letterbook "AI-native customer support platform"
100,000 users sounds like a dream Until you're personally answering 50+ support tickets a day... That was Dawson Chen. He'd scaled Martin, an AI personal assistant, to more than 100,000 users, but growth came with a new problem: Refund requests Subscription cancellations Login issues And the same support questions over and over again... To keep up, the team hired a virtual assistant and relied on tools like Zendesk and Freshdesk. But every ticket meant jumping between their inbox, Stripe, their database, and their knowledge base. The software wasn't built for how startups actually operate. So instead of accepting it, they built the tool they wished they'd had. Then shared it with a few founder friends. The response was immediate. That internal tool became Letterbook. Today, Letterbook is the AI-native alternative to Zendesk, Freshdesk, Zoho Desk, and Intercom - built specifically for startups. It connects to your inbox, Stripe, database, and knowledge base, then drafts a complete resolution for every support ticket: the reply, the refund, the cancellation, the next action. For many customers, 70–80% of tickets become a single approval instead of minutes of manual work. Their Product Hunt launch reached #3 Product of the Day. Most customer support platforms were built for enterprise support teams. Letterbook was built for founders. "The modern AI-native support platform" 🎙️ Dawson Chen, CEO & Founder, Letterbook on Fondo START pod ‍ 00:32 — From a 100,000-user AI app to discovering a support bottleneck 01:08 — Turning an internal tool into Letterbook 02:09 — Why AI-native support beats legacy help desks 02:47 — How context-aware AI drafts actions, not just replies 03:23 — Automating 70–80% of repetitive support work 04:20 — Why Letterbook is purpose-built for B2C startups 04:55 — Two YC founders, two co-founder breakups, one new company 06:42 — Building the default customer support platform for startups 08:08 — Lessons from launching to #3 on Product Hunt ‍ Check out www.letterbook.ai
#120
July 17 · 25 min
START: Emma Lawler, Product Lead, Rippling "Rippling Automated Compliance"
As a founder, Emma Lawler felt like SOC 2 was a major distraction from building. But when she started selling to enterprise logos, it became something that was impossible to ignore. Now, as Product Lead at Rippling, she channeled her first-hand experience of getting SOC 2 compliant to rethink how all automated compliance frameworks are run. It started with a retro. Every other SOC 2 vendor works the same way: Detect a problem Alert your team Fix it...somewhere else The problem with this checklist is that "somewhere else" requires dozens of additional integrations. Because these vendors are just reporting layers on top of your stack. Rippling is your stack. Which means most of your compliance evidence is collected before you start AND when there's a gap in compliance, Rippling fixes it. Unencrypted device --> encrypt it. Wrong app access --> de-provision automatically Incomplete security training --> gate system access until its done. Because compliance really isn't about the report. It's about operating your company securely -- and proving it without a yearly fire drill. Emma shares more about how her own founder journey influenced building Rippling's powerful new automated compliance product, available today for SOC 2 Type 1 and 2. 🎙️ Emma Lawler, Product Lead, Rippling on Fondo START pod ‍ 00:57 Introducing Rippling Automated Compliance 02:07 The evolution of compliance software 03:02 AI's role in compliance workflows 03:41 Understanding SOC 2 requirements 04:20 Compliance and enterprise procurement 05:03 Building secure operating practices 05:46 Product development at Rippling 06:28 Building with a lean team 07:15 Lessons from founding startups 08:55 Learning through product pivots 11:01 AI in modern product development 12:41 Planning and research with AI 16:05 Defining product-market fit 17:56 Using first-party data for compliance 21:35 Advice for early-stage founders ‍ Check out www.rippling.com/products/it/automated-compliance
#137
July 15 · 5 min
START: Agaaz Singhal, Founder & CEO, Tranzmit AI "Self-improving AI paywalls"
96% of users aren't saying no to your product. They're saying no to your paywall. And the only tool most teams have for that is manual A/B tests. Thousands of dollars per experiment. Weeks to trust one result. One variable at a time. Every test starts from zero. Stop guessing. Start compounding. Tranzmit AI builds, tests, and evolves paywalls instead. Analyze the behavioral data, generate variants, score them against simulation and conversion history, ship the winner with guardrails and auto-rollback. 50x faster than manual A/B. 25M paywall views a month feeding the loop. Every result sharpens the next one. Four months ago, Agaaz Singhal was pointing the same engine at the opposite end of the funnel. We recorded this episode in March, when Tranzmit sat on top of the cancel button: Detected at-risk customers before they cancelled Intervened with personalized conversations Identified the root cause of frustration Filed live Jira tickets for engineering Recovered customers who were ready to leave Five lines of code. Three-minute setup. Not just to stop churn. To understand it. Read the behavioral data, generate the intervention, measure it, loop. Same engine. The screen changed. In the episode Agaaz describes product teams flying blind for weeks, stitching together analytics dashboards while customers walked. Behavioral data, an intervention at the moment that decides revenue, measured and fed back. Same loop, pointed at the front door. Running 24/7. "Building self-improving software infrastructure" 🎙️ Agaaz Singhal, Founder, Tranzmit AI on Fondo START pod 00:26 Building AI product teams to reduce churn on consumer platforms 00:42 AI-native cancel buttons that understand why customers leave 01:11 Five lines of code. Three-minute implementation. 01:25 Predicting churn before users hit cancel 02:05 Recovering up to 28% of customers at the point of cancellation 02:35 Why product teams spend weeks trying to understand churn 03:20 Scaling a consumer platform to 700K monthly active users 03:35 The insight that led to building Tranzmit AI 03:50 Building in San Francisco at Founders Inc Check out tranzmitai.com
#102
July 14 · 16 min
START: Tarun Vedula & Alex Blackwell, Co-founders, Zatanna: “Turning all software into agent-first APIs”
Right now most AI agents interact with software the way humans do They open a browser, look at a screenshot, and try to figure out what to click That's like ripping the LIDAR off a Waymo and handing it a camera Tarun & Alex kept running into this problem. They were building an AI receptionist for dentists, and at conference after conference people asked the same thing: do you integrate with X or Y platform? Seven other people were doing the same thing. None of them could integrate. Alex and Tarun could, because they knew how to reverse engineer network requests That's when they stopped digging for gold and started selling shovels Zatanna turns legacy software into APIs by working at the network layer. No browsers. No screenshots. Just requests 10x faster on the workflows they benchmarked. Near-zero browser costs. Reliability goes from 70% to nearly 100%. Computers shouldn't navigate the web like humans do. Humans use screens. Computers use requests "No browser bots to babysit" ‍ 🎙️ Tarun Vedula & Alex Blackwell, Co-founders, Zatanna on Fondo START ‍ 00:57 From jury research to API infrastructure 02:04 The "sell the shovels" realization 03:18 Why browser agents break at scale 04:42 Turning legacy systems into APIs 05:47 Why repetitive workflows shouldn't use browsers 06:37 Teaching AI agents to navigate like computers 08:34 Founder-market fit and knowing when to pivot 10:20 From sneaker bots to reverse engineering anti-bots 12:23 The future of AI vs anti-bot warfare 13:37 Why companies are still stuck at 70% reliability Check out www.zatanna.ai to learn more.
#127
July 13 · 10 min
START: Kyle Wong, Co-Founder & CEO, InstaAgent “Scale marketing campaigns across hundreds of personas”
Before AI, marketing teams built five creatives for every campaign. Now they can generate fifty. But more content didn't solve marketing. It exposed a new bottleneck. Most of it is slop. AI solved the quantity problem. It created a quality problem. Kyle Wong and co-founder Colin Tseung built InstaAgent to solve the second one. A consumer brand hands InstaAgent a single marketing brief. From there, the team handles the strategy, the creative, the distribution, and the analytics. The result isn't 50 generic ads. It's personalized content built for hundreds of distinct audiences - each with its own messaging, creative, and targeting. Think about a global CPG company. One hundred SKUs. Ten countries. That's a thousand creative variations before you even start optimizing performance. The hard part isn't generating content anymore. It's knowing what to create. Anyone can pay $25 a month for an AI model. Very few know how to turn that model into marketing that actually performs. That's why InstaAgent isn't positioning itself as another self-serve AI tool. It's an AI-native marketing partner - combining human judgment with AI execution to produce creative that brands can actually scale. The market is responding. From $0 to $1M ARR in just 10 months. Enterprise customers including Nestlé and P&G. Enterprise sales cycles closing in less than a month. The first wave of AI made content abundant. The next wave will reward the companies that know exactly who that content is for. 🎙️ Kyle Wong, Co-Founder & CEO, InstaAgent on Fondo START pod 00:15 — What InstaAgent actually does: scaling one campaign across hundreds of personas 00:40 — The full loop from a single brief: strategy, creation, distribution, analytics 00:55 — Why the bet is on TikTok and Meta, where AI video is moving fastest 01:20 — The old way: five creatives per campaign, slow and expensive 01:39 — How AI multiplied output to 50 — and why most of it misses 02:06 — Moving upmarket from SMBs to enterprise names like Nestlé and P&G 02:30 — The CPG math that makes manual creative impossible: 100 SKUs, 10 countries 03:20 — Replacing the Canva-and-Photoshop resizing grind 03:44 — Why an agency model beats self-serve SaaS for AI creative 04:45 — On token-maxing and the tokens offer from Sam Altman at YC 05:47 — From eight years at Goldman to a game that hit 1M users in a month 07:20 — How a hot sauce brand used synthetic personas to broaden its audience ‍ Check out instaagent.com
#90
July 10 · 9 min
START: Koby Conrad, Founder & CEO, Sunflower Sober: “The #1 AI Companion for sobriety"
1.2 billion people struggle with addiction. There will never be enough clinicians to treat them. Koby Conrad believes AI changes that equation. His own story starts much smaller. High 24/7 from 19 to 24. He got sober. Taught himself to code. Built a side project called Sunflower. Years later, that side project became a VC-backed company with a much bigger ambition. Today, Sunflower has: → 500,000+ users and counting → Grown from 200 to 100,000 monthly active users in under 6 months → Reached a $1M run rate in about 10 months → Tracked 109 years of sobriety every single day → Expanded to users in almost every country, across 5 languages The product combines consumer software with clinical care. A consumer app featuring: An AI sponsor for addiction recovery Visual sobriety progression tracking A social network built for recovery CBT journaling and educational content across major addiction types Alongside a tele-therapy clinic: - Talk therapy in California and Texas, expanding nationwide with MAT - World-class doctors building the most effective protocols for addiction The mission began with one billion sober days. The team realized they'd reach that goal sooner than expected. So they raised the target. One trillion. Koby's growth philosophy mirrors the one behind his book, "Channels of Growth": Don't choose between product and distribution. Build both. Because at real scale, only a handful of growth channels matter. Find the one that fits your business—and optimize it relentlessly. His biggest prediction isn't about sobriety. It's about work. At Sunflower, they call it 'Operation Ender's Game' Map every task. Automate what AI can do today. Design for what AI will do tomorrow. The only role left? fleet operator. 🎙️ Koby Conrad, CEO & Founder, Sunflower Sober on Fondo START pod Chapters: 00:49 – Koby joins the show 01:10 – The pitch: a sobriety platform built for the age of ASI 01:35 – Sunflower's origin as a learn-to-code project 01:54 – Koby's own story: high 24/7 from 19 to 24 02:31 – From bootstrapped side project to VC-backed company 02:46 – Zero to $1M run rate in 10 months 03:00 – Tracking 109 years of sobriety every day 03:10 – Why the mission grew from one billion to one trillion days 03:52 – The growth framework: product and distribution, never one or the other 05:03 – The only channels that scale: virality, paid, organic audience 06:01 – Doing YC with his brother, from selling eggs to SF Compute 08:00 – Operation Ender's Game and the fleet operator future

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