Cosmic was founded by Tony Spiro in 2016.

Who are Cosmic's investors?

Cosmic's investors include Aera VC, Y Combinator, Pale Blue Dot, Possible Ventures, Syndicate One.

Where is Cosmic headquartered?

Cosmic is headquartered in San Francisco, US.

Cosmic

YC W19

San Francisco, US · Founded 2016 · 5 employees · 5 known investors

Find your way into Cosmic

Paths you didn't know you had: your email and LinkedIn already hold routes to the Cosmic team. We find them for you
2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Cosmic provides a content management system with web dashboard and API tools that enable teams to build and deploy applications faster. It serves development teams and digital businesses seeking to accelerate content velocity and application delivery.

Also known as Cosmic JS Inc. · Cosmic JS

AI & Machine Learning Cloud Computing Developer Tools Enterprise Software SaaS APIUnited States of AmericaAmerica / CanadaFully Remote

Founders & leadership· Y Combinator alumni (W19)

Cosmic was founded in 2016 by Tony Spiro.

Tony Spiro Founder · CEOTony Spiro is founder and CEO of Cosmic, a content management system with web dashboard and API tools for development teams building and deploying applications.

Carson GibbonsInvestor2016–2019

Investors · 5

Aera VClisted by Aera VCSingapore · $25K – $5M

How we know: Aera VC's portfolio page · press coverage · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Pale Blue DotreportedMalmö · $200K – $2.2M

How we know: press coverage · Not right? Tell us

Possible VenturesreportedMunich · $100K – $5M

How we know: press coverage · Not right? Tell us

Syndicate Onereported$550K

How we know: press coverage · Not right? Tell us

The YC application· Winter 2019 batch

Alumni Q&A

How did your company get started? (i.e., How did the founders meet? How did you come up with the idea? How did you decide to be a founder?): CEO Tony had spent years working with legacy CMS tools such as WordPress and Drupal and found building websites with them difficult. He started Cosmic to create an API-driven CMS that could deliver content to any website or app.
How did you decide to apply to Y Combinator? What was your experience applying, going through the batch, and fundraising at demo day?: The founders showed the product to developers for feedback, and one suggestion was to apply to YC. They found the batch valuable for the network, events, Bookface, and hiring.
How have you kept in touch with the YC community and continued to use YC resources & programs since the batch ended?: The founders have stayed connected through Bookface, using it to source talent and follow startup advice and news, but have not kept in touch with their group partners or batchmates.
What is the core problem you are solving? Why is this a big problem? What made you decide to work on it?: The company addresses the difficulty of building content-powered websites and apps, aiming to make content operations faster and easier so businesses can get to market more quickly.
What is your long-term vision? If you truly succeed, what will be different about the world?: The founders' long-term vision is a platform with three layers: a service offering a dashboard, API, and asset management; a marketplace drawing on the Cosmic community; and an integration network connecting to third-party services. The goal is to make building content-powered websites and apps faster, easier, and cheaper.

Summarized from the founders' answers on their Y Combinator profile.

Related companies · 10

HygraphHygraph is a GraphQL-native headless CMS platform that enables teams to create, deliver, and distribute content across multiple channels. It serves development teams building digital products who need flexible, API-driven content management without the limitations of traditional CMS systems.

MatterMatter is a read-later app for iPhone, iPad, and web that saves articles, newsletters, threads, PDFs, and video/podcast content with parsing and search capabilities. The app serves individual readers seeking organized content consumption and curation across multiple sources.

StrapiStrapi is a headless content management system that enables content teams to create, update, and publish website and app content without developer assistance. The platform targets business teams and developers who need faster content delivery and customizable templates across websites, apps, and IoT projects.

AfrostreamAfrostream is a video streaming service offering films, shows, and web series focused on African and African-American content, available across multiple devices and in 28 countries in Europe and Africa.

SanitySanity provides a content operations platform built on a structured content database where JSON documents and code-defined schemas power web, mobile, and AI agent applications through a single API. It offers a customizable content studio, programmable automation, content agents, and enterprise governance for teams managing content across multiple brands and channels.

Women.comWomen is a lifestyle media site covering celebrities, trends, fashion, beauty, and pop culture for readers seeking entertainment and cultural content.

PrismicPrismic is a headless CMS that enables marketing teams to quickly create and manage dynamic web pages using reusable components called slices, with design system integration and scalable architecture. The platform supports SEO-optimized landing page generation, personalization, and content localization for B2B companies looking to drive organic growth.

Curious FictionsA platform where readers can discover short stories and provide financial support directly to the writers who create them.

AnthropicAnthropic is an AI safety research company that builds reliable, interpretable, and steerable AI systems. The company conducts frontier AI research, applies safety techniques, and deploys systems through products and partnerships.

DataCampDataCamp is a learning platform for teams that teaches data and AI skills through hands-on coursework accessible via web browser and mobile app. It serves enterprise customers and development teams seeking to build technical capabilities.

Companies working in the same space as Cosmic.

Legal entities · 1

corporate structure

Cosmic JS Inc.

In the news

The Cosmic AI Platform: A complete AI-enabled app development & deployment platformycombinator.com · Aug 2025

🚀 Cosmic - Headless CMS and API toolkit v2.0ycombinator.com · May 2023

Frequently asked questions

What does Cosmic do?: Cosmic provides a content management system with web dashboard and API tools that enable teams to build and deploy applications faster. It serves development teams and digital businesses seeking to accelerate content velocity and application delivery.
Who founded Cosmic?: Cosmic was founded by Tony Spiro in 2016.
Who are Cosmic's investors?: Cosmic's investors include Aera VC, Y Combinator, Pale Blue Dot, Possible Ventures, Syndicate One.
Where is Cosmic headquartered?: Cosmic is headquartered in San Francisco, US.