yc-s24
(29)
Affil.ai
Affil.ai is an AI-powered compliance and monitoring platform for financial affiliate marketing. It automatically reads the blogs, comparison sites and partner pages where affiliates promote a company's products, flags regulatory violations across thousands of pages, and turns each issue into a trackable ticket - letting banks, fintechs and other regulated brands scale affiliate programs without drowning in manual review. Founded in 2024 by John Ta, Vivek Olumbe and Vishal Vinjapuri, the company went through Y Combinator's Summer 2024 batch and has raised about $500K.
Apten
Apten is a Y Combinator (S24) startup building omni-channel AI agents that engage and nurture leads across SMS, voice, email, and webchat. Aimed at B2C enterprises in home services, insurance, education, healthcare, and financial services, its agents hold one continuous memory across every channel, follow up at the right moment, transfer live calls to humans, and plug into CRMs like Salesforce and HubSpot. The company says its conversational approach converts previously dead leads into sales opportunities at a much higher rate than robocalls or static drip campaigns.
Cheers
Cheers is a Y Combinator (S24) startup building a full-stack Generative Engine Optimization (GEO) platform for local service businesses. It helps HVAC, plumbing, roofing, solar and smart-home companies get recommended by AI assistants like ChatGPT and by Google, by auditing their AI visibility, fixing their web presence, and turning frontline employees into a review engine using NFC tap tools with per-employee attribution.
CreativeMode
CreativeMode is a no-code, AI-powered platform that lets Minecraft players build their own mods by describing what they want in plain English. It generates ready-to-play mobs, items, blocks, weapons and structures for both Java and Bedrock editions, then lets creators publish, share and compete with them. Founded in 2024 by three ex-Crusoe engineers and part of Y Combinator's Summer 2024 batch, CreativeMode says players have made more than 450,000 mods on the platform.
FirstWork
FirstWork is a San Francisco-based, YC S24 enterprise AI company building autonomous agents that automate workforce operations for frontline and seasonal labor. Its platform handles document verification, credentialing, continuous compliance, and worker onboarding inside a company's existing systems, cutting time-to-hire and onboarding by up to 80%. Founded in 2024 by Vardhan Kapoor (ex-Remitly, Deliveroo) and Shubham Choudhary (ex-Deel, Rippling), FirstWork raised a $5M seed round led by Gradient and serves staffing, logistics, delivery, and care companies including Deel, Job&Talent, Relay, and Wonolo.
Handled
Handled is an AI operations platform that automates the manual, reactive work that piles up after an online order is placed - order processing, shipment tracking, exception handling, returns, and invoice reconciliation - for omnichannel consumer-brand teams and the third-party logistics providers (3PLs) that fulfill for them. Founded in 2024 out of Y Combinator's S24 batch by Audrey Djiya and Peter Nsaka (legally Zimi, Inc.), the company connects to the ERPs, 3PLs, sales channels, and carriers a brand already uses and does the busywork around the clock.
HeroUI
HeroUI (formerly NextUI) is an open-source React and React Native component library that pairs the accessibility of React Aria with the utility-first styling of Tailwind CSS. Founded by Junior Garcia and backed by Y Combinator's Summer 2024 batch, it ships 75+ web components plus a native library, and positions itself as a UI framework built for both human developers and AI coding agents.
Intryc
Intryc is an AI-powered quality assurance platform for customer support teams. It evaluates up to 100% of support interactions in real time - human and AI-handled - using customizable scorecards, sampling rules and LLM-driven analysis, then turns those evaluations into coaching, training simulations and performance insights. Founded in 2023 by three ex-Revolut, Confluent, Amazon and Meta operators, Intryc went through Y Combinator's S24 batch and raised a $3.1M oversubscribed seed round in early 2025.
Kastle
Kastle is a San Francisco startup building AI voice and messaging agents purpose-built for consumer lending, starting with mortgage servicing. Its agents answer borrower calls, take payments, chase delinquent accounts, qualify loan inquiries and score every interaction against lending regulations like FDCPA, TILA and RESPA. Founded in 2024 by Rishi Choudhary and Nitish Poddar and backed by Y Combinator (S24), Kastle plugs into existing systems of record such as ICE MSP and works with large mortgage servicers, including Carrington Mortgage Services.
Kontigo
Kontigo is a USDC-based neobank built for Latinos in the U.S. and Latin America. It pairs a self-custody stablecoin wallet with a card, no-fee cross-border transfers, yield on balances, and an AI banker over WhatsApp - aiming to give people in high-inflation economies a dollar account that works across borders. Founded in 2023 and part of Y Combinator's Summer 2024 batch, it reported roughly 1 million users and over $1 billion in payment volume before raising a $20 million seed round in December 2025.
Miru
Miru is a San Francisco startup (Y Combinator S24) building configuration and deployment infrastructure for robotics and IoT fleets. Its platform lets engineers version, validate, and push software configs to thousands of devices as easily as pushing a change to GitHub, replacing the manual SSH scripts and homegrown tooling most robotics teams rely on today.
Moreta
Moreta (Moreta Pay) is a Y Combinator S24 fintech building a mobile wallet that lets international travelers, expats and digital nomads pay local merchants by scanning QR codes across Southeast Asia and Latin America - using their own currency, at real exchange rates, without needing a local bank account. It connects to national QR networks like Indonesia's QRIS, Thailand's PromptPay and the Philippines' QR Ph so a Western visitor can pay at street stalls and cafes the same way a local does.
Orca
Orca is a San Francisco startup (Y Combinator S24) that lets anyone build, host, and play Minecraft games without writing code. You describe a mod, plugin, or world in plain English and Orca's AI writes the code, generates textures, compiles a real mod, tests it, and can deploy it live to a free 8 GB server in seconds. The company frames its ambition as building a Roblox-style creator platform on top of Minecraft's 300M+ player base, playable from a browser or a free desktop client.
Passage
Passage is an AI co-pilot for customs brokers and freight forwarders that automates the tedious paperwork of clearing imported goods. Founded in 2024 by former Google and Flexport engineers Terrell Marshall and Aditya Nadkarni, and backed by Y Combinator's S24 batch, the software reads commercial invoices, bills of lading, and packing lists, checks them for consistency, classifies products under HTSUS tariff codes, drafts filings, and handles routine email correspondence - work that entry writers otherwise do by hand for hours each day.
RentFlow
RentFlow is a New York fintech, part of Y Combinator's Summer 2024 batch, that builds a 'Buy Now, Pay Later' layer for commercial rent. It pays landlords their full rent on the 1st of the month, then lets business tenants repay in smaller installments synced to their real cash flow. The company pairs payments infrastructure with AI underwriting that reads transaction-level and behavioral signals to price flexibility, aiming to keep otherwise-healthy small and medium businesses from being pushed into default by a single fixed lump-sum bill.
Rowboat
Rowboat (YC S24) is a San Francisco and Bengaluru startup building open-source AI agent software. It began as a pre-trained customer-support LLM agent, grew into a widely starred open-source IDE for building multi-agent systems on the OpenAI Agents SDK, and is now 'your AI coworker, with memory' - a local-first desktop app that turns your emails, meetings, and notes into an editable knowledge graph so agents can actually get work done. Founded by the team behind Agara (acquired by Coinbase in 2021).
Sensei Robotics
Sensei Robotics (YC S24) is a San Francisco startup building the data layer for robot learning. It pairs a sub-$300 sensorized exoskeleton arm with a distributed network of trained human operators - 'Senseis' - who perform real-world manipulation demonstrations on demand. Robotics and AI teams submit a task like folding cloth or loading a dishwasher, and Sensei returns curated, labeled human-demonstration data. The company positions itself as 'the Scale AI for robotics training data,' claiming roughly a tenth of the cost and twice the speed of conventional teleoperation setups.
Spaceium Inc.
Spaceium is a Y Combinator (S24) aerospace startup building unmanned refueling and servicing stations in orbit - what its founders call service stations along a 'space superhighway.' Its proprietary cryogenic storage system holds multiple metric tons of fuel for up to a decade in orbit without boil-off, and its high-precision robotic arm transfers propellant and performs repairs. The goal is to let spacecraft top up in space instead of carrying all their fuel from launch, extending missions and lowering costs for satellites, orbital transfer vehicles, and eventual Moon and Mars missions.
Typa
Typa is a YC-backed (S24) AI ghostwriting platform that helps founders, companies, and agencies turn voice notes, links, and stray ideas into on-brand posts across X, LinkedIn, Bluesky, and newsletters. Built by the team behind Weavel, its 24/7 agent 'Puff' learns a user's voice, keeps a self-updating knowledge base of their work, and drafts content for approval before publishing - aiming to make consistent, authentic content possible without burnout.
Vendra
Vendra is a San Francisco-based, YC-backed (S24) manufacturing platform that connects hardware teams with US manufacturers for custom parts. Customers submit a single RFQ; Vendra reads the CAD and drawings, matches the job to domestic suppliers with the right equipment and open capacity, gathers competitive quotes, and manages production through delivery. It is ITAR-registered and focused on aerospace, defense, and hard-tech companies, positioning itself against legacy quoting platforms like Xometry and Protolabs with real-time capacity matching.
winfunc
winfunc (formerly Asterisk, YC S24) is an AI-native security engineering platform that behaves like an autonomous hacker: it finds, verifies, and patches vulnerabilities in codebases. Instead of dumping thousands of unverified SAST alerts on engineers, winfunc spins up sandboxes, writes working proof-of-concept exploits, and only reports bugs it can actually trigger - aiming for near-zero false positives. Its agent has surfaced real vulnerabilities in Node.js, React, NGINX, Supabase, Bun, Sentry, Gumroad, Anthropic's MCP SDK, and others. Founded by Mufeed VH and Vivek R, the team previously built Devika, a popular open-source AI software engineer.
Usul
Usul is an AI platform that helps companies win government and defense contracts. Founded in 2024 and part of Y Combinator's Summer 2024 batch, it monitors trillions in annual government spending, scrapes DoD contracts, budgets, and Program Executive Offices, then matches companies to relevant opportunities and connects them with the right decision-makers. Often described as 'PitchBook for Government,' Usul aims to make an opaque, insider-driven procurement world navigable for any technology company.
Pulse
Pulse is a San Francisco AI company building production-grade document extraction for enterprises. Its vision-language models and OCR pipeline turn messy PDFs, scans, and spreadsheets into clean, structured, LLM-ready data - powering RAG, automation, and analytics across finance, healthcare, insurance, legal, and supply chain.
Corgi
Corgi is an AI-native, full-stack insurance carrier built specifically for technology startups. Founded in 2024 by Nico Laqua and Emily Yuan through Y Combinator's Summer 2024 batch, Corgi owns its own carrier (Technology Risk Retention Group), enabling it to underwrite, price, and bind policies in minutes rather than the industry-standard weeks. The company offers coverage including general liability, directors & officers, cyber, tech E&O, and AI liability — directly tailored to how startups actually operate. With 40,000+ customers across 49 U.S. states, $40M+ ARR, and $268M raised at a $1.3B valuation as of May 2026, Corgi became Y Combinator's latest unicorn just 18 months after its founding.
Zeit AI
Zeit AI is a YC S24 enterprise analytics startup founded by two former Palantir engineers who believe business intelligence should require nothing more than plain English. Their product, ZeitMind, lets non-technical users query Excel files, CSVs, ERP systems, and databases using natural language - turning weeks of analyst work into seconds of typing. Backed by Y Combinator, Oxford Seed Fund, and ACE Ventures, Zeit AI is quietly rewriting how enterprises turn raw data into decisions.
ZeroPath
ZeroPath is an AI-native application security platform that automatically finds and fixes software vulnerabilities. Founded in 2024 by four security and engineering veterans - including a former Google Security Engineer and a former Tesla Red Team engineer - ZeroPath replaces noisy legacy SAST tools with an LLM-powered engine that understands code semantics, verifies exploitability, and generates working patches. Within a year of launch, over 1,000 organizations trust ZeroPath to scan more than 200,000 codebases per month.
Zettascale Computing Corporation
Zettascale Computing Corporation (formerly Exa Laboratories) builds polymorphic XPU chips that reconfigure their own dataflow architecture to match each AI model - delivering up to 27.6x greater energy efficiency than NVIDIA H100 GPUs. Founded by a 21-year-old Swedish dropout and a Cambridge-trained engineer, this YC S24 company is shipping prototype Grasshopper cards fully manufactured in America, with commercial release planned for 2026. Their ambition: make zettascale computing sustainable and become the hardware substrate for all future AI.
Zoa Research
Zoa Research is a New York-based AI research lab building cross-domain quantitative forecasting models that generalize across finance, science, and beyond. Founded by Greg Volynsky and Sam Damashek - a Harvard Law/CMU duo and a Jane Street algorithmic trading veteran - Zoa trains LLM-powered multi-agent systems to automate the model-build-test-improve cycle. The result: forecasting engines that outperform narrow models in event prediction, deployed both as proprietary trading capital and as a Forecast-as-a-Service API for researchers, traders, and scientific labs. Backed by Y Combinator (S24), Zoa is building the infrastructure layer for probabilistic reasoning at scale.
Zuni (ZuniRemoteAI)
Zuni (by Old House Labs Inc.) is a Chrome sidebar AI copilot built for knowledge workers who refuse to leave their existing tools. Rather than forcing users into yet another chat interface, Zuni sits quietly in the browser sidebar, reads the open tab, understands the Gmail inbox, and surfaces actionable intelligence in real time. Founded in 2024 by Cambridge alumni George Seabridge and Will Taylor (a 2x YC founder), Zuni is backed by Y Combinator (S24) and offers access to the world's leading AI models — GPT-4o, Claude 3.7 Sonnet, Gemini 2.0 Flash, DeepSeek R1, and more — all in one place, without switching apps.