Awesome open-source alternatives to SaaS

Awesome list of open-source startup alternatives to established SaaS products. Maintained by folks at

Also checkout our ROSS index: fastest-growing open-source startups, every quarter.

Criteria

Open-source company is added to the list if: 1. Its product is strongly based on an open-source repo 2. It has a well-known closed-source competitor, solving a similar business problem 3. It is a private for-profit company, founded in the last 10 years 4. Its repo has 100+ stars on GitHub

Things change really fast in the startup world, so this list can neither be fully complete, nor 100% up to date.

Don't hesitate to contribute and add new startups. Let's build the most comprehensive list together.

Any questions or suggestions? Feel free to DM project maintainer @garrrikkotua

Startup List

All startups in the list are sorted by categories and sorted in alphabetical order. If you click on the stars badge you will get to the product's repo. Have a good search!

Category	Company	Description	GitHub Stars	Alternative to
API Gateway	Apache APISIX	Cloud Native API Gateway under the Apache Software Foundation		apigee
API Platform	Firecamp	DX first open-source API devtool		Postman
API Platform	Fusio	API management platform		Postman
API Platform	Hoppscotch	API development ecosystem		Postman
API Platform	Keploy	e2e Testing and Data Mocking		Smartbear, Newman
API Platform	Step CI	API Testing and Monitoring		Checkly, Postman
Auth & SSO	BoxyHQ	Enterprise Readiness made simple		Auth0
Auth & SSO	Cerbos	Granular access control		Okta, Auth0
Auth & SSO	FusionAuth	User authentication and session management framework		Okta, Auth0
Auth & SSO	Hanko	Passkey-first authentication framework		Okta, Auth0
Auth & SSO	Keycloak	User authentication and session management framework		Okta, Auth0
Auth & SSO	OPAL (Permit.io)	Authorization administration framework (Open Policy)		Okta, Auth0
Auth & SSO	Ory	Identity platform		Okta, Auth0
Auth & SSO	Oso	Authorization building framework		Okta, Auth0
Auth & SSO	Supertokens	User authentication and session management framework		Okta, Auth0
Auth & SSO	Warrant	Authorization and access control as a service		Okta, Auth0
Auth & SSO	Zitadel	User authentication and session management framework		Okta, Auth0
Backend as a service	AceBase	Backend server with REST APIs to manage core backend needs		Firebase
Backend as a service	Amplication	Backend server with REST and GraphQL APIs to manage core backend needs		Firebase
Backend as a service	Appwrite	Backend server with REST APIs to manage core backend needs		Firebase
Backend as a service	CASE	Lightweight Backend-as-a-Service with essential features		Firebase
Backend as a service	Encore	Backend Development Engine for cloud-based apps, APIs, and distributed systems		Firebase
Backend as a service	Kuzzle	Backend server with REST APIs to manage core backend needs		Firebase
Backend as a service	Nhost	Backend server with GraphQL		Firebase
Backend as a service	PocketBase	Backend server with REST APIs to manage core backend needs		Firebase
Backend as a service	Supabase	Backend server with REST APIs to manage core backend needs		Firebase
Business Intelligence	Metabase	Business intelligence software		Tableau, Power BI, DataStudio
Business Intelligence	Preset	Modern BI platform powered by Apache Superset		PowerBI, Tableau, Mode Analytics
CMS	Builder	Drag and drop page builder and CMS		Contentful
CMS	Concrete	CMS for teams		Contentful
CMS	Decap CMS	Git-based CMS for static site generators		Contentful
CMS	Directus	Data platform which wraps any database with an intuitive app		Contentful
CMS	Ghost	Headless Node.js publishing platform		Medium, Substack
CMS	Plasmic	The headless page builder for singe-page frameworks		Contentful
CMS	Strapi	Node.js Headless CMS to build customisable APIs		Contentful
CMS	Sulu	Modern Symfony based CMS		Contentful
CMS	Tina	Visual editor for React websites		Contentful
CMS	Webiny	Enterprise serverless CMS	<img src