Discover the Best Open Source Repositories

Parse Server

Open-source Node.js backend with REST and GraphQL APIs, push notifications, and file storage on MongoDB or Postgres.

Alternative to:

Firebase

Stars21.4K

Forks4.8K

Last commit3 days ago

Docmost

Docmost is an open source collaborative wiki and documentation platform with real-time editing, diagrams, spaces, and permissions.

Alternative to:

Confluence

Stars22K

Forks1.7K

Last commit3 days ago

LiveKit

LiveKit is an open source WebRTC platform providing a scalable SFU media server and client/server SDKs for real-time video, audio, and data.

Alternative to:

Agora

Stars21.5K

Forks2.5K

Last commit3 days ago

BookStack

BookStack is an open source platform for organizing documentation and information into books, chapters, and pages.

Alternative to:

Confluence

Stars19.1K

Forks2.4K

Last commit3 days ago

Windmill

Windmill is an open source platform that turns scripts into APIs, workflows, and internal UIs with auto-generated frontends.

Alternative to:

Retool

Stars18.2K

Forks1.1K

Last commit2 days ago

APITable

APITable is a database-spreadsheet hybrid with real-time collaboration, unlimited cross-table links, and an API-first architecture.

Alternative to:

Airtable

Stars15.6K

Forks1.4K

Last commit1 month ago

SuperTokens

SuperTokens is an open source, self-hosted alternative to Auth0 and Firebase Auth with SDKs for major frameworks.

Alternative to:

Auth0

Stars15.3K

Forks835

Last commit3 days ago

PeerTube

PeerTube is a decentralized, federated video platform built on ActivityPub, an open-source alternative to YouTube.

Alternative to:

YouTube

Stars15.4K

Forks1.9K

Last commit3 days ago

Seafile

Self-hosted cloud storage and file sync platform with library encryption, versioning, and team sharing.

Alternative to:

Dropbox

Stars15.3K

Forks1.7K

Last commit3 days ago

ZITADEL

ZITADEL is an open source identity and access management platform with SSO, MFA, passkeys, OIDC, SAML, and native multi-tenancy.

Alternative to:

Auth0

Stars15.3K

Forks1.4K

Last commit3 days ago

Automatisch

Automatisch is a self-hosted automation tool connecting apps like Slack and Twitter into workflows, without requiring programming knowledge.

Alternative to:

Zapier

Stars14K

Forks1.1K

Last commit8 months ago

Ory Kratos

Ory Kratos is an open source, API-first identity and user management system for login, registration, recovery, and MFA.

Alternative to:

Auth0

Stars13.9K

Forks1.2K

Last commit3 months ago

Documenso

Documenso is the open source, self-hostable alternative to DocuSign for digital document signing.

Alternative to:

DocuSign

Stars15.4K

Forks3.4K

Last commit2 days ago

Unleash

Unleash is a feature flag platform for gradual rollouts, canary releases, and toggling functionality without redeploying code.

Alternative to:

LaunchDarkly

Stars13.9K

Forks910

Last commit3 days ago

Formbricks

Formbricks is an open source survey platform for in-app, website, link, and email surveys, self-hosted via Docker.

Alternative to:

Qualtrics

Stars13.1K

Forks2.6K

Last commit2 days ago

ILLA Builder

ILLA Builder is an open-source, self-hosted low-code platform for developers to build internal tools quickly.

Alternative to:

Retool

Stars12.3K

Forks1.2K

Last commit5 months ago

Quickwit

Open-source, Elasticsearch-API-compatible search engine built for sub-second search directly on cloud storage.

Alternative to:

Elasticsearch

Stars11.7K

Forks615

Last commit3 days ago

Owncast

Owncast is an open source, self-hosted live video streaming and chat server that gives you full control over your content.

Alternative to:

Twitch

Stars11.6K

Forks1.2K

Last commit4 days ago

Leantime

Leantime is an open source project management tool combining kanban, gantt, goal tracking, and wikis, built as an alternative to Asana and ClickUp.

Alternative to:

Asana

Stars11.8K

Forks1.2K

Last commit3 days ago

Mautic

Mautic is an open source marketing automation platform for email campaigns, segmentation, and multi-channel workflows.

Alternative to:

HubSpot

Stars10.8K

Forks3.5K

Last commit3 days ago

Akaunting

Akaunting is open source, self-hosted accounting software for small businesses, built on Laravel and Vue.

Alternative to:

QuickBooks

Stars10.2K

Forks3K

Last commit11 days ago

Invoice Ninja

Invoice Ninja is a self-hostable invoicing, billing, and payments platform with client portals, recurring invoices, and Stripe support.

Alternative to:

FreshBooks

Stars10.3K

Forks2.8K

Last commit3 days ago

Nhost

Nhost bundles PostgreSQL, an instant GraphQL API, authentication, storage, and functions as a Firebase alternative.

Alternative to:

Firebase

Stars9.4K

Forks634

Last commit3 days ago

BigBlueButton

BigBlueButton is an open-source virtual classroom with video, whiteboards, polling, and breakout rooms for teaching.

Alternative to:

Google Meet

Stars9.2K

Forks6K

Last commit2 days ago

Ghostfolio

Open-source wealth management app for tracking stocks, ETFs, and crypto with portfolio performance analytics.

Alternative to:

Kubera

Stars9.5K

Forks1.4K

Last commit3 days ago

HeyForm

HeyForm is an open source conversational form builder for surveys, quizzes, and polls, with logic, theming, and analytics.

Alternative to:

Typeform

Stars9K

Forks719

Last commit4 days ago

Anytype

Anytype is a local-first, end-to-end encrypted personal knowledge base for building pages, wikis, and databases with peer-to-peer sync.

Alternative to:

Notion

Stars8.9K

Forks591

Last commit6 days ago

Vendure

Vendure is an open source, headless commerce platform built on Node.js, NestJS, and GraphQL for D2C, B2B, and marketplace stores.

Alternative to:

commercetools

Stars8.5K

Forks1.5K

Last commit3 days ago

GrowthBook

GrowthBook is an open source, warehouse-native platform for feature flags, experimentation, and product analytics.

Alternative to:

LaunchDarkly

Stars8.5K

Forks884

Last commit2 days ago

Standard Notes

Standard Notes is an end-to-end encrypted note-taking app with cross-platform sync and a self-hostable, public source codebase.

Alternative to:

Evernote

Stars6.7K

Forks561

Last commit2 days ago

Flagsmith

Flagsmith is an open source feature flag, remote config, and A/B testing platform with on-premise hosting options.

Alternative to:

LaunchDarkly

Stars6.6K

Forks587

Last commit2 days ago

Lightdash

Lightdash is an open-source BI tool that turns your dbt project's metrics and dimensions into shareable dashboards.

Alternative to:

Looker

Stars6.2K

Forks791

Last commit2 days ago

Zammad

Web-based, open-source helpdesk platform unifying email, chat, phone, and social support in one place.

Alternative to:

Freshdesk

Stars6K

Forks1.1K

Last commit3 days ago

Baserow

Baserow is an open source, no-code platform for building databases, applications, automations, and dashboards, self-hosted or cloud.

Alternative to:

Airtable

Stars6.2K

Forks767

Last commit3 days ago

Vikunja

Vikunja is a self-hosted to-do and task management app with an AGPL-licensed API and web client for organizing personal and team work.

Alternative to:

Todoist

Stars5.8K

Forks759

Last commit2 days ago

Parse Server

Open-source Node.js backend with REST and GraphQL APIs, push notifications, and file storage on MongoDB or Postgres.

Alternative to:

Firebase

Stars21.4K

Forks4.8K

Last commit3 days ago

Docmost

Docmost is an open source collaborative wiki and documentation platform with real-time editing, diagrams, spaces, and permissions.

Alternative to:

Confluence

Stars22K

Forks1.7K

Last commit3 days ago

LiveKit

LiveKit is an open source WebRTC platform providing a scalable SFU media server and client/server SDKs for real-time video, audio, and data.

Alternative to:

Agora

Stars21.5K

Forks2.5K

Last commit3 days ago

BookStack

BookStack is an open source platform for organizing documentation and information into books, chapters, and pages.

Alternative to:

Confluence

Stars19.1K

Forks2.4K

Last commit3 days ago

Windmill

Windmill is an open source platform that turns scripts into APIs, workflows, and internal UIs with auto-generated frontends.

Alternative to:

Retool

Stars18.2K

Forks1.1K

Last commit2 days ago

APITable

APITable is a database-spreadsheet hybrid with real-time collaboration, unlimited cross-table links, and an API-first architecture.

Alternative to:

Airtable

Stars15.6K

Forks1.4K

Last commit1 month ago

SuperTokens

SuperTokens is an open source, self-hosted alternative to Auth0 and Firebase Auth with SDKs for major frameworks.

Alternative to:

Auth0

Stars15.3K

Forks835

Last commit3 days ago

PeerTube

PeerTube is a decentralized, federated video platform built on ActivityPub, an open-source alternative to YouTube.

Alternative to:

YouTube

Stars15.4K

Forks1.9K

Last commit3 days ago

Seafile

Self-hosted cloud storage and file sync platform with library encryption, versioning, and team sharing.

Alternative to:

Dropbox

Stars15.3K

Forks1.7K

Last commit3 days ago

ZITADEL

ZITADEL is an open source identity and access management platform with SSO, MFA, passkeys, OIDC, SAML, and native multi-tenancy.

Alternative to:

Auth0

Stars15.3K

Forks1.4K

Last commit3 days ago

Automatisch

Automatisch is a self-hosted automation tool connecting apps like Slack and Twitter into workflows, without requiring programming knowledge.

Alternative to:

Zapier

Stars14K

Forks1.1K

Last commit8 months ago

Ory Kratos

Ory Kratos is an open source, API-first identity and user management system for login, registration, recovery, and MFA.

Alternative to:

Auth0

Stars13.9K

Forks1.2K

Last commit3 months ago

Documenso

Documenso is the open source, self-hostable alternative to DocuSign for digital document signing.

Alternative to:

DocuSign

Stars15.4K

Forks3.4K

Last commit2 days ago

Unleash

Unleash is a feature flag platform for gradual rollouts, canary releases, and toggling functionality without redeploying code.

Alternative to:

LaunchDarkly

Stars13.9K

Forks910

Last commit3 days ago

Formbricks

Formbricks is an open source survey platform for in-app, website, link, and email surveys, self-hosted via Docker.

Alternative to:

Qualtrics

Stars13.1K

Forks2.6K

Last commit2 days ago

ILLA Builder

ILLA Builder is an open-source, self-hosted low-code platform for developers to build internal tools quickly.

Alternative to:

Retool

Stars12.3K

Forks1.2K

Last commit5 months ago

Quickwit

Open-source, Elasticsearch-API-compatible search engine built for sub-second search directly on cloud storage.

Alternative to:

Elasticsearch

Stars11.7K

Forks615

Last commit3 days ago

Owncast

Owncast is an open source, self-hosted live video streaming and chat server that gives you full control over your content.

Alternative to:

Twitch

Stars11.6K

Forks1.2K

Last commit4 days ago

Leantime

Leantime is an open source project management tool combining kanban, gantt, goal tracking, and wikis, built as an alternative to Asana and ClickUp.

Alternative to:

Asana

Stars11.8K

Forks1.2K

Last commit3 days ago

Mautic

Mautic is an open source marketing automation platform for email campaigns, segmentation, and multi-channel workflows.

Alternative to:

HubSpot

Stars10.8K

Forks3.5K

Last commit3 days ago

Akaunting

Akaunting is open source, self-hosted accounting software for small businesses, built on Laravel and Vue.

Alternative to:

QuickBooks

Stars10.2K

Forks3K

Last commit11 days ago

Invoice Ninja

Invoice Ninja is a self-hostable invoicing, billing, and payments platform with client portals, recurring invoices, and Stripe support.

Alternative to:

FreshBooks

Stars10.3K

Forks2.8K

Last commit3 days ago

Nhost

Nhost bundles PostgreSQL, an instant GraphQL API, authentication, storage, and functions as a Firebase alternative.

Alternative to:

Firebase

Stars9.4K

Forks634

Last commit3 days ago

BigBlueButton

BigBlueButton is an open-source virtual classroom with video, whiteboards, polling, and breakout rooms for teaching.

Alternative to:

Google Meet

Stars9.2K

Forks6K

Last commit2 days ago

Ghostfolio

Open-source wealth management app for tracking stocks, ETFs, and crypto with portfolio performance analytics.

Alternative to:

Kubera

Stars9.5K

Forks1.4K

Last commit3 days ago

HeyForm

HeyForm is an open source conversational form builder for surveys, quizzes, and polls, with logic, theming, and analytics.

Alternative to:

Typeform

Stars9K

Forks719

Last commit4 days ago

Anytype

Anytype is a local-first, end-to-end encrypted personal knowledge base for building pages, wikis, and databases with peer-to-peer sync.

Alternative to:

Notion

Stars8.9K

Forks591

Last commit6 days ago

Vendure

Vendure is an open source, headless commerce platform built on Node.js, NestJS, and GraphQL for D2C, B2B, and marketplace stores.

Alternative to:

commercetools

Stars8.5K

Forks1.5K

Last commit3 days ago

GrowthBook

GrowthBook is an open source, warehouse-native platform for feature flags, experimentation, and product analytics.

Alternative to:

LaunchDarkly

Stars8.5K

Forks884

Last commit2 days ago

Standard Notes

Standard Notes is an end-to-end encrypted note-taking app with cross-platform sync and a self-hostable, public source codebase.

Alternative to:

Evernote

Stars6.7K

Forks561

Last commit2 days ago

Flagsmith

Flagsmith is an open source feature flag, remote config, and A/B testing platform with on-premise hosting options.

Alternative to:

LaunchDarkly

Stars6.6K

Forks587

Last commit2 days ago

Lightdash

Lightdash is an open-source BI tool that turns your dbt project's metrics and dimensions into shareable dashboards.

Alternative to:

Looker

Stars6.2K

Forks791

Last commit2 days ago

Zammad

Web-based, open-source helpdesk platform unifying email, chat, phone, and social support in one place.

Alternative to:

Freshdesk

Stars6K

Forks1.1K

Last commit3 days ago

Baserow

Baserow is an open source, no-code platform for building databases, applications, automations, and dashboards, self-hosted or cloud.

Alternative to:

Airtable

Stars6.2K

Forks767

Last commit3 days ago

Vikunja

Vikunja is a self-hosted to-do and task management app with an AGPL-licensed API and web client for organizing personal and team work.

Alternative to:

Todoist

Stars5.8K

Forks759

Last commit2 days ago

Discover the Best Open Source Repositories

A curated directory of the best GitHub repositories, ranked by stars and organized by category. Find your next open-source tool, framework, or library.