AI funding rounds in September 2025: 22 rounds
- Periodic Labs raises $300M Seed, . AI models. Led by Andreessen Horowitz, DST Global. Builds AI scientists and autonomous labs to discover new materials such as superconductors.
- Vercel raises $300M Series F, . Developer tools. Led by Accel, GIC. Vercel runs a cloud platform for deploying and hosting web apps and AI features, and makes the Next.js framework and v0.
- Modal raises $87M Series B, . AI infrastructure. Led by Lux Capital. Modal offers a serverless cloud platform for running AI inference, training and batch jobs on GPUs from Python code.
- PostHog raises $75M Series E, . Analytics. Led by Peak XV Partners. PostHog makes an open source product analytics platform with session replay, feature flags, experiments and a data warehouse for developers.
- Nscale raises $1.1B Series B, . AI infrastructure. Led by Aker ASA. Nscale builds and operates AI data centers and a GPU cloud across Europe and North America.
- Factory raises $50M Series B, . Developer tools. Led by NEA. Builds Droids, autonomous AI agents that carry out software development tasks.
- Modular raises $250M Series C, . AI infrastructure. Led by US Innovative Technology Fund. Modular builds a software platform and the Mojo language for running AI workloads across different chips without rewriting code.
- Cohere raises $100M Growth, . AI models. Cohere builds large language models and AI tools for enterprises.
- 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.
- Groq raises $750M Growth, . AI infrastructure. Led by Disruptive. Groq designs LPU inference chips and runs the GroqCloud service for fast AI model inference.
- Figure AI raises $1B Series C, . Robotics. Led by Parkway Venture Capital. Builds general-purpose humanoid robots for commercial and home work.
- Invisible Technologies raises $100M Growth, . Data infrastructure. Led by Vanara Capital. Invisible Technologies supplies AI training data and builds custom AI workflows and agents for enterprises.
- CodeRabbit raises $60M Series B, . Developer tools. Led by Scale Venture Partners. Provides AI code review for pull requests.
- 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.
- Perplexity raises $200M, . AI apps. Runs an AI answer engine that searches the web and cites its sources.
- Mistral AI raises a Series C round, . AI models. Led by ASML. Builds open-weight and commercial large language models for enterprises and governments.
- Cognition raises $400M, . Developer tools. Led by Founders Fund. Builds Devin, an autonomous AI software engineer, and owns the Windsurf editor.
- Verda raises $64M Series A, . AI infrastructure. Led by byFounders, Skaala, Varma, Tesi. Verda (formerly DataCrunch) is a European GPU cloud that provides AI compute and managed inference.
- Baseten raises $150M Series D, . AI infrastructure. Led by BOND. Baseten provides infrastructure for deploying and serving AI models in production with fast, reliable inference.
- Sierra raises $350M, . AI apps. Led by Greenoaks Capital. Builds AI agents that handle customer service for large companies.
- 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.
- Anthropic raises $13B Series F, . AI models. Led by ICONIQ, Fidelity Management & Research Company, Lightspeed Venture Partners. Builds the Claude family of AI models with a focus on AI safety research.