openDesk
Germany's government-built alternative to Microsoft 365. A Kubernetes-based suite integrating Nextcloud, Element, OpenProject and Collabora, stewarded by a state-owned company for the public sector.
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 183 solutions
OpenTalk
German-built, EUPL-licensed video conferencing for the European public sector. Self-hosted, GDPR-aligned, and the first VC service to earn Germany's BSI IT security label.
Gitea
MIT-licensed Git forge self-hosted on one Go binary: issues, CI/CD actions and a package registry. Now steered by a US for-profit; SAML, audit logs and IP allowlisting sit behind a paid Enterprise tier.
GitLab
Open-core DevSecOps platform: Git hosting, CI/CD and project management in one self-hostable app. The core is genuinely MIT, but SSO, merge approvals and compliance tooling are gated to paid tiers.
Forgejo
A self-hosted Git forge that replaces GitHub and GitLab, with issues, pull requests and CI/CD built in. Every feature is free software, with no paid tier and no managed option.
Horilla
A self-hosted Django HRMS covering recruitment, payroll, attendance and performance, all free under LGPL-2.1. No module is paywalled; only SSO and managed hosting sit behind a paid tier.
Proxmox VE
An AGPLv3 bare-metal platform for virtual machines and containers, built to replace VMware vSphere. Clustering, HA and live migration are free; only the tested enterprise update track needs a subscription.
OrangeHRM
GPL-3.0 self-hosted HR management system for employee records, leave and time tracking. The free Starter edition covers core HR, but external API access, payroll connectors and advanced recruitment are gated to a paid tier.
LibreOffice
Mature open-source desktop office suite for documents, spreadsheets and presentations. Fully offline, no per-seat licence, native OpenDocument format, the standard exit route from Microsoft format lock-in.
OPNsense
A FreeBSD-based firewall and router that replaces Fortinet and Cisco appliances, with IDS/IPS, VPN and traffic shaping built in. The paid edition only gates a hardened, slower release track, not features.
Nextcloud
A self-hosted alternative to Microsoft 365: files, calendars, mail, chat and office in one suite, with every byte on infrastructure you control. Enterprise hardening and support are a paid subscription.
Beekeeper Studio
GPLv3 modern SQL editor with a polished, friendly UI: the free Community Edition covers the common relational databases. Enterprise and NoSQL drivers, SSO, team cloud workspaces, and AI sit behind the paid Ultimate edition.
ShareX
Screen-capture power tool for Windows: screenshots, screen recording, and scriptable capture-to-link workflows across 80+ upload destinations. No cloud, no account, no telemetry. Windows-only; GPL-3.0.
LocalSend
Moves files directly between devices on your local network. No cloud, no account, no internet hop. A cross-platform, offline alternative to AirDrop and WeTransfer (Windows, macOS, Linux, iOS, Android). Apache-2.0; single-maintainer project.
Murmure
Fully local, offline speech-to-text dictation that types into any app using on-device Parakeet models and optional Ollama cleanup: zero telemetry, no cloud, and completely free.
Varlock
Schema-driven .env management adding type-safety, validation, and AI-safe secret redaction over plain .env files: keeps credentials out of AI prompts, logs, and client bundles.
Coder
AGPL-licensed platform for self-hosted cloud development environments: provision Terraform-defined workspaces and govern AI coding agents on infrastructure you control, with no per-seat SaaS fees.
CryptPad
Zero-knowledge encrypted office suite (docs, sheets, slides, forms): the server stores only ciphertext, so even the admin can't read your files. AGPL, EU-based; the full suite is free, only managed hosting is paid.
Mem0
A memory layer for AI agents: extracts and recalls facts across sessions so the LLM stops re-sending full history. Apache-2.0, self-hostable on Postgres and Qdrant; SSO and audit logs are Enterprise-gated.
Chroma
AI-native embedding database for RAG: runs embedded via pip or as a Docker server, with portable SQLite/Parquet storage for clean data exit. Apache-2.0, but the OSS core ships without built-in authentication.