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Cosmic

Cosmic is an AI-powered headless CMS

y-combinatorWinter 2019Developer ToolsAPI🇺🇸 San Francisco5 people
Tony Spiro

Tony Spiro · 1 founder

2018Founded
Team
5
current
Co-founders
1
current
Stage
Founded
Source for Founded
Profile coverage4 of 8 · missing Funding, Signals, Customers, Stack / tools · last run 8/11/2026

About

Cosmic is an AI-powered headless CMS built for teams that move fast. We combine flexible content infrastructure with AI Agents that live in Slack, write content, build features, fix bugs, and deploy apps autonomously. Developers get a REST API with sub-100ms response times, a TypeScript SDK, CLI, and MCP Server that plugs directly into Cursor, Claude Code, and GitHub Copilot. Content teams get an intuitive dashboard with 20+ metafield types, AI image and video generation, and no migrations ever. Teams use Cosmic because it eliminates the need to build and maintain CMS infrastructure while giving them AI capabilities most platforms haven't shipped yet. Used by teams in 150+ countries, 50M+ API requests per month, 99.9% uptime SLA. Forever free plan. No credit card required.

Founder