Open Source & Self-Hostable Directory • 2026
Ditch the SaaS Tax.
Go Open Source.
Own your data, eliminate recurring per-seat fees, and regain autonomy. Below is our curated index of premier open-source alternatives to proprietary cloud giants.
Supabase
Apache-2.0The open-source Firebase alternative. Instant Postgres database, real-time subscriptions, authentication, storage, and auto-generated REST & GraphQL APIs.
Penpot
MPL-2.0The first open-source, web-based design and prototyping platform built for cross-domain teams. Uses native SVG as the default format.
PostHog
MITSingle platform for product analytics, session replays, feature flags, A/B testing, and user surveys with zero data limits on self-hosted instances.
Mattermost
AGPL-3.0Open-source, self-hosted collaboration platform with private cloud messaging, voice calls, audio screen sharing, and workflow automation for technical teams.
Cal.com
AGPL-3.0Scheduling infrastructure for everyone. Fully customizable booking links, team round-robin routing, and automatic timezone conversions with white-label embed.
Plausible Analytics
AGPL-3.0Simple, lightweight (< 1 kB script) and privacy-focused web analytics alternative. No cookies, fully compliant with GDPR, CCPA and PECR out of the box.
n8n
Sustainable Use LicenseFair-code workflow automation tool with 400+ native integrations, AI agent node connectors, and self-hosted execution without task limit overages.
NocoDB
AGPL-3.0Open-source smart spreadsheet that turns any existing PostgreSQL, MySQL, SQL Server, or SQLite database into a collaborative smart table.
AppFlowy
AGPL-3.0Open-source Notion alternative built with Flutter and Rust. Prioritizes local-first data security, native offline performance, and extensible plugins.
Coolify
Apache-2.0An open-source & self-hostable all-in-one PaaS that helps you manage servers, applications, and databases across any VPS with simple Git push deployments.
Formbricks
AGPL-3.0Open-source survey software for collecting micro-surveys in-app, on websites, and via links. Clean typography, customizable triggers, and privacy controls.
Listmonk
AGPL-3.0High-performance, self-hosted newsletter and mailing list manager powered by a single Go binary and PostgreSQL. Sends thousands of emails per second.