Developer tools

Cosmic

Website
Founded 2016Origin source ↗Checked 2026-09-15

Overview

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.

Company description As recorded 2026-11-08
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Developer toolsAPI platformBusinessesDevelopersSubscription

Founders & team

Previously Cosmic JS

Company history As recorded 2026-11-08

Tony Spiro

Founder/CEO

My name is Tony Spiro (Cosmic W2019) I'm interested in solving problems with technology. Find me on Twitter: @tonyspiro

LinkedIn X
Founder profile As recorded 2026-09-15
5team members reported
Source-reported As recorded 2026-09-15

Founded 2016 · Source

Origins

Tony, the CEO, worked on CMS tools for years (WordPress, Drupal, etc) and found the process of building websites with legacy CMS systems daunting. He started building Cosmic to have an API-powered CMS that enabled content to be delivered to any website or app.

Founder account As recorded 2026-09-15

News & product activity

Sources & observations

Product Hunt · Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA; Remote
Pricing evidenceA pricing page was detected
Maturity: Operating · 4 of 6 areas documented

Source-based assessment · automated evidence rules

The company website explicitly reports customer or user adoption. This is a source-based assessment of a company claim; scale and revenue are not independently verified.

Company website: about Checked 2026-09-16

Trusted by product and marketing teams shipping content at scale

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yearpricing page observeddocumentation observedrecent publishing observeddated product or funding activity
startup.observe Directory coverage · Sources & method