Y Combinator portfolio: 35 rounds in AI and data
Rounds where Y Combinator led or took part, newest first. Led: 3.
- Easol raises $31M Series A, . AI apps. Led by Y Combinator. Easol, a London-based experience commerce platform, has closed a €26.78 million ($30 million) Series A extension round, bringing its total raised to date to €53.57 million ($60 million).
- Sava raises $10M Seed, . AI apps. Led by Gradient Ventures. Sava is an AI-native, Nevada-chartered trust company.
- Nous Research raises $90M Series B, . AI models. Led by Robot Ventures. Nous Research develops open-source AI models and autonomous agents.
- Raindrop raises a Series A round, . Developer tools. Led by CRV. Monitoring and simulation tools that detect failures in production AI agents.
- Hypercubic raises $5.3M Seed, . Developer tools. Led by CIV. AI agents that map legacy COBOL codebases and rewrite them in modern languages.
- Blacksmith raises $45M Series B, . Developer tools. Led by Peak XV Partners. Code build and testing platform with an AI agent that fixes failed CI checks.
- Naïve raises $29M Series A, . AI apps. Led by Nexus Venture Partners. Single API that lets AI agents form companies and set up payments, email, phone numbers and cloud services.
- HappyRobot raises $150M Series C, . AI apps. Led by Prysm Capital, Eurazeo. Builds AI agents, including voice agents, that automate operational workflows for logistics and other enterprises.
- Dili raises $15M Series A, . AI apps. Led by Khosla Ventures. AI compliance software that checks federally funded construction projects against wage and labor rules.
- Weave raises $14M Series A, . Developer tools. Led by Standard Capital. Engineering-intelligence platform that measures human and AI code output and the ROI of AI tooling.
- Fly.io raises $25M Series D, . Developer tools. Led by Dell Technologies Capital, Intel Capital. Developer cloud that runs applications and AI agents on lightweight VMs close to users.
- telli raises $15M Seed, . AI apps. Led by redalpine. telli provides AI agents that handle customer conversations and operations for B2C companies across voice, chat and messaging.
- Bunkerhill Health raises $25M Series B, . AI apps. Led by Khosla Ventures. Deploys AI agents and FDA-cleared clinical algorithms inside hospitals to handle operational and clinical tasks.
- Emergent raises $130M Series C, . AI apps. Led by Creaegis. AI coding platform that lets small businesses and entrepreneurs build, deploy and host software apps.
- Sazabi raises $8M Seed, . Developer tools. Led by J2 Ventures, Village Global, Y Combinator. AI-native observability platform that uses agents and logs to detect and resolve production issues.
- Emergent raises $70M Series B, . Developer tools. Led by SoftBank Vision Fund 2, Khosla Ventures. Emergent is a vibe coding platform where AI agents build and deploy full applications from natural language prompts.
- Deepgram raises $130M Series C, . AI models. Led by AVP. Deepgram provides speech recognition, text to speech and voice agent APIs for developers.
- Raindrop raises $15M Seed, . Developer tools. Led by Lightspeed. Raindrop is a monitoring platform that detects silent failures in production AI agents.
- Mem0 raises $20M Series A, . AI infrastructure. Led by Basis Set Ventures. Mem0 builds a memory layer that lets AI apps and agents remember users and context across sessions.
- Supabase raises $100M Series E, . Databases. Led by Accel, Peak XV. Supabase offers an open source Postgres-based backend platform with auth, storage and APIs for app developers.
- Emergent raises $23M Series A, . Developer tools. Led by Lightspeed. Emergent is a vibe coding platform where AI agents build and deploy full applications from natural language prompts.
- Replit raises $250M Series C, . Developer tools. Led by Prysm Capital. Runs a browser based coding platform with an AI agent that builds and deploys apps.
- HappyRobot raises $44M Series B, . AI apps. Led by Base10 Partners. HappyRobot builds AI voice and agent workers that automate communication and operations for logistics and industrial companies.
- Firecrawl raises $15M Series A, . AI infrastructure. Led by Nexus Venture Partners. Firecrawl offers an API and open source tool that crawls, scrapes and converts websites into clean data for AI applications.
- Vanta raises $150M Series D, . Security. Led by Wellington Management. Vanta automates security compliance and trust management, including SOC 2, ISO 27001 and vendor risk.
- PostHog raises $70M Series D, . Analytics. Led by Stripe. PostHog makes an open source product analytics platform with session replay, feature flags, experiments and a data warehouse for developers.
- Supabase raises $200M Series D, . Databases. Led by Accel. Supabase offers an open source Postgres-based backend platform with auth, storage and APIs for app developers.
- telli raises $3.6M Pre-seed, . AI apps. Led by Cherry Ventures, Y Combinator. telli builds AI agents that handle calls and customer-facing operations for B2C companies.
- Speak raises $78M Series C, . AI apps. Led by Accel. Speak makes an AI language tutor app that teaches people to speak a new language through spoken conversation practice.
- Supabase raises $80M Series C, . Databases. Led by Peak XV, Craft Ventures. Supabase offers an open source Postgres-based backend platform with auth, storage and APIs for app developers.
- Vanta raises $150M Series C, . Security. Led by Sequoia Capital. Vanta automates security compliance and trust management, including SOC 2, ISO 27001 and vendor risk.
- Legora raises $25M Series A, . AI apps. Led by Redpoint Ventures. Legora makes a collaborative AI workspace for lawyers and law firms.
- Scale AI raises $1B Series F, . Data infrastructure. Led by Accel. Scale AI provides training data, data labeling and evaluation services for AI model builders and government customers.
- Photoroom raises $43M Series B, . AI apps. Led by Balderton Capital. Photoroom is an AI photo editing app and API for product images and background removal.
- Meticulous raises $4M Seed, . Developer tools. Meticulous automatically generates and maintains end to end UI tests that catch visual and logic regressions before code ships.