Reflection AI develops frontier open-weight language models and autonomous coding agents using reinforcement learning post-training.

Y CombinatorW24

Storio is an AI-powered fiction writing platform that helps authors draft, edit, and publish stories faster.

Scope provides AI-powered inspection workflow software for testing, inspection, and certification teams.

Ankar AI is an AI operating system for patent professionals that streamlines the entire patent lifecycle from invention to protection.

Y CombinatorW26

Ossus builds AI-native library systems for public and school libraries.

Y CombinatorS24

AI trade-compliance platform automating duty drawback, tariff recovery, and customs filings for importers.

Y CombinatorF25

Sol is a free macOS browser that turns the browser into an AI IDE for front-end development with coding agents.

Venice AI is a private, uncensored AI platform for text, image, and video generation.

Anthropic is an AI safety and research company building reliable, interpretable, and steerable AI systems.

DeepIP is a generative AI patent drafting and prosecution platform for patent attorneys.

Y CombinatorW25

Operand builds an AI platform that analyzes business data to deliver expert-verified decisions for retail and e-commerce brands.

Y CombinatorS18

AI-driven SaaS for efficient, safe lab management & equipment monitoring.

Y CombinatorS25

Billing infrastructure for AI.

Fonoa automates indirect tax compliance for global digital businesses.

Doublezero is a developer platform for building, operating, and monetizing fully autonomous agents.

Y CombinatorS25

Freya builds voice AI for enterprise customer interactions.

Letta builds a platform for stateful AI agents with persistent memory.

Leo AI builds an engineering assistant for mechanical design teams that generates assemblies and answers PLM-grounded questions.

DealWise AI is an AI-powered commercial real estate underwriting platform for investors, brokers, and operators.

Y CombinatorS24

AI transcription platform for court reporters producing live rough-draft transcripts of legal proceedings.

Y CombinatorS24

Document-intelligence API converting complex unstructured documents into structured, LLM-ready data for enterprises.

Y CombinatorF25

Visual AI editor letting product designers ship UI changes directly to production code.

Y CombinatorF25

Unified web intelligence API giving AI agents real-time people, company, and market data.

Y CombinatorW25

Voice AI platform with CRM and dialer for Medicare and ACA insurance agencies.

Y CombinatorX26

Developer of emotive, low-latency foundation voice models for building conversational voice agents.