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Sealbook / Open source / Self-hosted apps (SaaS alternatives)

Top open-source self-hosted apps (saas alternatives) on GitHub

1,859 repositories with 1,000+ stars, ranked by stars. Leading: excalidraw, immich, Stirling-PDF.

RepositoryStarsLanguageLicenseActivity
101linkwarden/linkwarden⚡️⚡️⚡️ Self-hosted collaborative bookmark manager to collect, read, annotate, and fully preserve what matters, all in one place.★ 20.1kTypeScriptAGPL-3.0Active
102refactoringhq/tolariaDesktop app to manage markdown knowledge bases★ 20.1kTypeScriptAGPL-3.0Active
103resend/react-email💌 Build and send emails using React★ 19.8kTypeScriptMITActive
104uvdesk/community-skeletonUVdesk Open Source Community Helpdesk is a comprehensive ticketing support system designed for everyone, offering robust features to streaml★ 19.6kCSSOSL-3.0Active
105simplex-chat/simplex-chatSimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps★ 19.6kHaskellAGPL-3.0Active
106stitionai/devikaDevika is the first open-source implementation of an Agentic Software Engineer. Initially started as an open-source alternative to Devin.★ 19.6kPythonMITStale
107decaporg/decap-cmsA Git-based CMS for Static Site Generators★ 19.4kJavaScriptMITActive
108ActivityWatch/activitywatchThe best free and open-source automated time tracker. Cross-platform, extensible, privacy-focused.★ 19.3kPythonMPL-2.0Active
109C4illin/ConvertX💾 Self-hosted online file converter. Supports 1000+ formats ⚙️★ 19.2kTypeScriptAGPL-3.0Active
110BookStackApp/BookStackNOW MANAGED ON CODEBERG★ 19.1kPHPMITActive
111baidu/amis前端低代码框架，通过 JSON 配置就能生成各种页面。★ 18.9kTypeScriptApache-2.0Slowing
112spotify/luigiLuigi is a Python module that helps you build complex pipelines of batch jobs. It handles dependency resolution, workflow management, visual★ 18.8kPythonApache-2.0Active
113docusealco/docusealOpen source DocuSign alternative. Create, fill, and sign digital documents ✍️★ 18.8kRubyAGPL-3.0Active
114ether/etherpadEtherpad: A modern really-real-time collaborative document editor.★ 18.6kTypeScriptApache-2.0Active
115teambit/bitAI-powered development workspaces with reusable components, architectural clarity and zero overhead.★ 18.5kTypeScriptOtherActive
116APIJSON/APIJSON🏆 Real-Time no-code, powerful and secure ORM 🚀 providing APIs and Docs without coding by Backend, and Frontend(Client) can customize respon★ 18.4kJavaOtherActive
117mjmlio/mjmlMJML: the only framework that makes responsive email easy★ 18.3kJavaScriptMITActive
118windmill-labs/windmillOpen-source developer platform to power your entire infra and turn scripts into webhooks, workflows and UIs. Fastest workflow engine (13x vs★ 18.2kRustOtherActive
119Foundry376/Mailspring:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.★ 17.9kTypeScriptGPL-3.0Active
120nodemailer/nodemailer✉️ Send e-mails with Node.JS – easy as cake!★ 17.7kTypeScriptOtherActive
121getzola/zolaA fast static site generator in a single binary with everything built-in. https://www.getzola.org★ 17.5kRustEUPL-1.2Active
122foambubble/foamA personal knowledge management and sharing system for VSCode★ 17.5kTypeScriptOtherActive
123robbietilton/CompositorThe Photoshop alternative for Mac★ 17.4kSwiftMITActive
124suitenumerique/docsDocs is an open-source text editor: web-native, made for real-time collaboration, cleanly structured documents and sub-documents with full o★ 16.9kPythonMITActive
125hubotio/hubotA customizable life embetterment robot.★ 16.8kJavaScriptMITActive
126openimsdk/open-im-serverIM Chat OpenClaw★ 16.7kGoApache-2.0Active
127iamgio/quarkdown🪐 Markdown with superpowers: from ideas to papers, presentations, websites, books, and knowledge bases.★ 16.3kKotlinGPL-3.0Active
128FreshRSS/FreshRSSA free, self-hostable news aggregator…★ 16.3kPHPAGPL-3.0Active
129gotify/serverA simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)★ 16.1kGoOtherActive
130alam00000/bentopdfThe Privacy First PDF Toolkit★ 16.1kJavaScriptAGPL-3.0Active
131bagisto/opensource-ecommerce-mobile-appThis open-source mobile ecommerce app seamlessly transforms your Bagisto store into a powerful mobile platform, providing real-time synchron★ 16.1kDart—Active
132amplication/amplicationAmplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows th★ 16kTypeScriptOtherSlowing
133Billionmail/BillionMailBillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Jo★ 15.9kGoAGPL-3.0Slowing
134rjsf-team/react-jsonschema-formA React component for building Web forms from JSON Schema.★ 15.9kTypeScriptApache-2.0Active
135alibaba/lowcode-engineAn enterprise-class low-code technology stack with scale-out design / 一套面向扩展设计的企业级低代码技术体系★ 15.9kTypeScriptMITStale
136spree/spreeOpen Source Platform for DTC, B2B Commerce, Marketplaces & Omnichannel. REST APIs, TypeScript SDKs, and production-ready Next.js storefront.★ 15.8kRubyBSD-3-ClauseActive
137getgrav/gravModern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS powered by PHP, Markdown, Twig, and Symfony★ 15.7kPHPMITActive
138apitable/apitable🚀🎉📚 APITable, an API-oriented low-code platform for building collaborative apps and better than all other Airtable open-source alternatives.★ 15.6kTypeScriptAGPL-3.0Active
139Termix-SSH/TermixSelf-hosted, plugin-based server management.★ 15.6kTypeScriptApache-2.0Active
140rmyndharis/OpenWAFree, Open Source, Self-Hosted WhatsApp API Gateway★ 15.6kTypeScriptMITActive
141xournalpp/xournalppXournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian,★ 15.5kC++GPL-2.0Active
142documenso/documensoThe Open Source DocuSign Alternative.★ 15.5kTypeScriptAGPL-3.0Active
143mail-in-a-box/mailinaboxMail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail★ 15.4kPythonCC0-1.0Active
144supertokens/supertokens-coreOpen source alternative to Auth0 / Firebase Auth / AWS Cognito ★ 15.3kJavaOtherActive
145haiwen/seafileBeyond file syncing and sharing, a new way to organize your files with extensible file properties and flexible views★ 15.3kCOtherActive
146theonedev/onedevThe Unified and Autonomous Development Platform★ 15.3kJavaMITActive
147cachethq/cachet🚦 Cachet, the open source, self-hosted status page system.★ 15.3kPHPOtherActive
148librespeed/speedtestSelf-hosted Speed Test for HTML5 and more. Easy setup, examples, configurable, mobile friendly. Supports PHP, Node, Multiple servers, and mo★ 15.2kJavaScriptLGPL-3.0Active
149megadose/holeheholehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the fo★ 15.2kPythonGPL-3.0Stale
150tteck/ProxmoxProxmox VE Helper-Scripts★ 15.2kShellMITArchived