YC Launch Startup Launch Videos

Most AI video tools stop at prompting, but LTX goes a layer deeper. Introducing the new LTX Trainer. Train LoRAs and IC-LoRAs across video, audio, cross-modal, and reference-conditioned workflows f

Introducing LTX’s newest open-weight model for realtime avatars - available on Reactor day 0. We're proud to partner with @ltx_io to make it easier than ever to build lip-synced, fully-voiced AI

Today, we’re launching Bland Speech v3 - The world's first Human Speech Engine. In @designarena’s Audio Realism benchmark, Speech v3 is the top model, outranking Elevenlabs, Grok, Cartesia, and

It’s never been easier to design your dream house. Draw a shape. Define your rooms. Set your constraints. @DraftedAI generates complete floor plans, elevations, and 3D home designs in seconds. Over

Introducing Respan AI Gateway. The world’s first AI gateway with built-in observability, evals, and prompt optimization. Access 1,000+ models through one endpoint, with the production layer teams ne

Today we're launching Paxel: a free tool that analyzes your Claude, Codex, and Cursor coding sessions and gives you a profile of how you build with AI. It runs locally inside Docker, and your co

Aster (@asterailabs) is building the autonomous research lab. They run thousands of AI agents in parallel to achieve 1000x speedups in autonomous research. Their lab just set a world record on Protei

Today we're launching Rivet, a tool that explores dozens of interfaces with you. - Start from your local agent - Connect your design references - See your directions in one place I want Rivet t

Nox Metals exists so America can build 100x more factories and technologically abundant industrial capacity in the West. We are announcing our $11.5M Seed round led by Hyperion, with participation fr

Today we're introducing Claude for sales. Just describe your ideal customer and Gojiberry instantly finds and contacts high-intent buyers. This is truly insane. https://t.co/PeD7baDKop

Today we're launching Luel Labs, our end-to-end multimodal data lab. Our research is powered by Luel's global network—leveraging 750,000+ contributors across 96+ countries to generate fully

We told our agent to hack another agent. It found a way in. Then another. Then another. And we can probably hack your agent too. Today, we’re launching Respan Security. https://t.co/zRka87R38o

Bloom (@trybloomai) is the brand layer for agents. It turns your brand into infrastructure that any agent can call to produce on-brand assets. Congrats on the launch, @rincidium! https://t.co/0qDEfQ

Today, we're launching Crosby Intelligence to push the frontier of legal AI forward. https://t.co/ia3NGm3390

The next big social platform won't start with photos or videos. It will start with games. https://t.co/EOEBWDUx2D is the TikTok for user-generated games: anyone can play, create, publish, and mo

1/ Today, we're launching universal deposit addresses. Each user gets one persistent address that accepts crypto deposits across supported chains and automatically settles funds into the token y

Varun Vummadi (@varunvummadi) is the co-founder of @GigaAI, which builds AI agents for customer support for some of the biggest companies in the world, including DoorDash, one of the largest crypto ex

Thomas is a virtual human who starts, runs, and grows his own companies. His only goal is to make money. In only 2 weeks, he made $17k. Congrats on the launch, @madebythomasai! https://t.co/R3T0Kz3

Congrats to @kiwicopple, @AntWilson, and the @supabase team on their $500M Series F at a $10B valuation! Database launches on Supabase have grown 600% in the past year, with more than 60% of new data

Today, we are announcing our $31M seed financing at Apollo Atomics. The $26M equity is led by FCVC with participation from Y Combinator, TeleSoft Partners, Alumni Ventures, Pelion Venture Partners, D

Introducing Respan Evals 2.0: Automation. Most AI production issues don’t show up as errors. They show up as answers that look valid but are wrong, incomplete, unsafe, or off-brand. Respan now runs

Today we're launching @onestop_sh. $1,000 to the most-starred listing by Sunday at midnight (NYC). Send your agent → https://t.co/1qt0uCpD2W May the most thrifty agent win. https://t.co/JDKGvM

Tenet Industries (@industriestenet) is building low-cost, mass-producible defense systems, starting with strike drones. Defense primes are still building Bugattis and Ferraris. Tenet is building the

Hub (@hubxyz) provides real-world training data to frontier AI labs and robotics. Human labor is half of global GDP. Almost none of it has ever been recorded. Hub opens access to it through a global

Result (@tryresult) is an operating system for starting a business. It helps users go from an idea to building a product, incorporating their companies, managing finances, filing taxes, and marketing—

Introducing Tacit Labs: an applied research lab at the intersection of AI and biology. https://t.co/lBhghiTVtY

1/ Introducing https://t.co/FQ8sagSilF - now live on @Pumpfun Reinventing the trading interface All of Solana on one canvas Imagine any trade strategy with AI And generate an interface for it $AL

We built the fastest explainer video generator in the world. Introducing Simi: turn any prompt, doc, or idea into a complete whiteboard explainer video in seconds. It supports 80+ languages, so the

Confido (@confidotech) is building the AI workforce for consumer brands, automating everything from accounting to sales and demand planning. They work with brands like Olipop and Dude Wipes, as well a

I joined Y Combinator with 14 users, building a dev tool for myself. Then @SaaiArora joined as CTO, and we started growing and shipping 2x faster. It forced us to rebuild product and infra from the g

Today, we're introducing Claude for Prospecting. Just describe your ideal customers, and Gojiberry finds and reaches out to hundreds of them from a single prompt. Welcome to the next era of sal

Sazabi is a next-generation observability platform designed for fast-moving, AI-native engineering teams. If you're using Datadog, Sentry, Grafana, or Axiom today, you could be moving ten times

Most voice AI falls apart the second a call gets complicated. @usebland is building the one that doesn't, and investors noticed. The company raised a $50 million Series C led by Dell Technolog

We just launched @TareBioInc (@ycombinator S26)! 🚀 We make personalized or population-level vaccines for any cancer or infection in weeks. We’ve already cured cancer in mice and will vaccinate our f

Lamina Labs is building the fastest infra for explainer videos. The first product from @laminalabs, Simi, turns any prompt or document into a whiteboard-style explainer video in seconds, across 80+ l

Today we're launching Yapper Earn: get paid to make content for brands. Browse paid opportunities, submit videos, and get paid every time a brand accepts your content. Comment "earn"

We just shipped self-serve for Locus Pro, the first OpenRouter for everything. You shouldn’t need a dozen subscriptions just to make your agent useful. Get access to 3,300+ providers and 16,000+ age

Soria is an AI Bloomberg Terminal built for sector-specialist investors, starting with healthcare. Agents aggregate hundreds of sources, monitor inflections, and alert investors in real time— and they

Today, we're introducing ChatGPT for Explainer Videos. With just one prompt, Simi lets you generate whiteboard-style explainer videos that actually teach you something in seconds. On our faste

Congrats to @CalebPeffer, @ericciarla, @nickscamara_, and @firecrawl on their $75M Series B! Firecrawl turns the web into clean, structured data for AI agents, with more than 1.5 million people build

Enjamb (@tryenjamb) puts AI agents across the entire drug program, from evidence synthesis to regulatory docs to statistical programming, cutting months off the path from preclinical to approval. htt

Today we're introducing Tinder for Sales. Just enter your URL, and Gojiberry finds and contacts your best high-intent leads automatically. This is crazy. https://t.co/5iKij1S5Mf

Plena (@plena_health) is the AI OS for specialty medical practices. It runs the operations — referrals, fax, scheduling & collections — end-to-end so doctors can focus on medicine. In 8 months, t

Congrats to @AndyLapsa, @Rkt_Da, and @stoke_space (W21) on their $1B Series E! They're building Nova, a rocket designed to be fully reusable, meaning both stages fly back and fly again. Today&#

Announcing our $15 million Series A, led by @Standard_Cap with participation from @ycombinator, @Vox_Capital, and other notable funds and angels. This brings our total funding to $30 million. We’re b

Gravy is building Agents for your money. @gravy_finance connects to your banks, investments, email and more to explain your money and automate your financial tasks. Congrats on the launch, @alitabba

Intelligence Factory is building human intelligence for robots. They train general-purpose manipulation models on human demonstration data (vision, action, and touch), then deploy them in warehouses,

Today, we're introducing Claude for Prospecting. Just describe your ideal customers, and Gojiberry finds and reaches out to hundreds of them from a single prompt. Welcome to the next era of sal