Cosmic

YC W19 · Active · Cosmic is an AI-powered headless CMS

Competitors

Companies closest to Cosmic
Company	Category	Status	Program
PayloadShared: headless cms, api, contentAcquiredDevtools	Devtools	Acquired	YCS22
TipeShared: headless cms, content, developerInactiveDevtools	Devtools	Inactive	YCW18
Magic HourShared: rest api, mcp server, imageActiveAI, Devtools	AI, Devtools	Active	YCW24
DaptaShared: headless cms, content, apiNot statedDevtools	Devtools	Not stated	500 GlobalGA 18
ManufactShared: mcp server, typescript, sdkActiveAI, Devtools	AI, Devtools	Active	YCS25

Adjacent

Companies next to Cosmic
Company	Category	Status	Program
TailorShared: api, headlessActiveAI, Devtools	AI, Devtools	Active	YCS22
HumworkShared: mcp server, claude code, apiActiveAI, Devtools	AI, Devtools	Active	YCX26
VoidShared: github copilot, cursor, featureActiveAI, Devtools	AI, Devtools	Active	YCS24
ParseShared: api, headless, developerActiveData, Devtools	Data, Devtools	Active	YCF25
Pen.devShared: claude code, mcp, cursorNot statedAI, Devtools	AI, Devtools	Not stated	speedrunSR005

Also from W19 in AI

All of W19

Company	Category	Status
BasilicaBasilica is an API that embeds high-dimensional data like images and…InactiveAI, Devtools	AI, Devtools	Inactive
GlideGlide turns spreadsheets into beautiful, intelligent apps.ActiveAI, Devtools	AI, Devtools	Active
1910Multimodal AI Platform for Modality Agnostic Drug Discovery™ActiveAI	AI	Active
Accept.inc (formerly BoardRE)BoardRE is a new type of mortgage company that upgrades any offer…AcquiredAI	AI	Acquired
AccioJobOffline-first tech skilling and placement for IndiaActiveAI	AI	Active
AI InsuranceAI Insurance is the platform that runs insurance companiesActiveAI	AI	Active

About Cosmic

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.

YC batch: W19 · Winter 2019
Status, per YC: Active
Category: AI, Developer tools
Team size: 5
Location: San Francisco, CA, USA; Remote
Checked: 31m ago

YC tags: Developer Tools, API

Cosmic in W19: 194 companies, 26% AI

Cosmic: questions

Which YC batch was Cosmic in?

Cosmic was in Y Combinator's Winter 2019 batch (W19).

Is Cosmic still active?

Y Combinator lists Cosmic as active.

Where is Cosmic based?

Cosmic lists San Francisco, CA, USA; Remote as its location on YC's directory.

Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.