Mattermost
A secure, self-hostable, open-source communication platform designed for enterprises that prioritize data sovereignty and require a private alternative to SaaS chat solutions.
Open Source Alternatives: The Sovereign Stack
A curated database of vetted open source alternatives to proprietary SaaS. Find tools that are safe, compliant, and ready for business.
Showing of 110 solutions
Docmost
An open-source, self-hosted alternative to Notion and Confluence, providing real-time collaborative documentation and wikis with complete data sovereignty.
Keycloak
The open-source standard for Identity and Access Management (IAM), offering complete sovereignty over user data, federation, and SSO infrastructure without per-user licensing costs.
PostHog
The all-in-one open-source platform for product analytics, session recording, feature flags, and experimentation.
Zitadel
An open-source, API-first identity infrastructure platform for multi-tenant authentication and authorization, providing an alternative to Auth0 or Firebase.
Coolify
An open-source, self-hostable platform-as-a-service (PaaS) that simplifies the deployment and management of web applications and databases.
OpenBao
A community-driven, open-source fork of HashiCorp Vault, providing secure secrets management for all environments.
RustDesk
A full-featured, open-source remote desktop alternative to TeamViewer and AnyDesk, written in Rust for high performance and security.
Zammad
A modern, fully open-source helpdesk and customer support system that unifies email, chat, and social channels into a single interface.
Penpot
The first open-source design and prototyping platform for product teams that bridges the gap between design and code, built with open web standards.
Open WebUI
A feature-rich, self-hosted web interface for LLMs (Ollama, OpenAI). Includes RAG, RBAC, and full offline capability for enterprise privacy.
Dark Reader
An open-source browser extension that intelligently inverts website colors to provide a comfortable dark theme, reducing eye strain.
IndustryFusion
An open-source, manufacturer-driven operating system for the smart factory. Enables digital sovereignty and interoperability in industrial environments.
Paperless-ngx
A free and open-source document management system that transforms your paper and digital chaos into a smart, searchable archive with AI automation.
BentoPDF
A 100% client-side, secure, and open-source alternative to iLovePDF. Process confidential documents without them ever leaving your browser.
Umami
A simple, fast, privacy-focused alternative to Google Analytics. Cookieless tracking means 100% data accuracy without consent banners.
AnythingLLM
The all-in-one desktop AI application for RAG, AI Agents, and No-Code automation. Run LLMs locally with full data privacy.