After Curating 72 Tools, Here Are the 12 Most-Deployed Self-Hosted Tools (2026)

We Curated 72 Tools — These 12 Are the Ones Teams Actually Deploy

Over the past year we curated 72 open-source alternatives across 16 categories, each mapped to the commercial SaaS it replaces. When you sort the whole directory by what the community actually uses — GitHub stars, real deployments, active maintenance — a short list of heavy hitters rises to the top.

Here are the 12 we keep coming back to, grouped by what they replace. Every one is free to self-host, and each entry links to the project's official site.

Backends & Data

Supabase (Free)

The default open-source Firebase alternative, with roughly 108,000 GitHub stars and an Apache-2.0 license. It gives you a real Postgres database with auth, realtime, storage, and edge functions. Read our full Supabase review for the details.

Appwrite (Free)

A self-hostable backend covering auth, databases, storage, and functions, with roughly 57,000 GitHub stars under a BSD-3-Clause license. Where Supabase centers on Postgres, Appwrite offers a broader BaaS surface with strong self-host docs and SDKs.

PocketBase (Free)

A single-binary Go backend with a realtime database, auth, and file storage, at roughly 61,000 GitHub stars and an MIT license. It is the favorite for small apps and prototypes that should deploy as one executable with no external services.

Meilisearch (Free)

A fast, typo-tolerant search API you run as a single Rust binary, with roughly 59,000 GitHub stars and an MIT license. It is the closest open-source answer to Algolia's instant-search experience.

Together these four cover the backend-plus-data layer: Supabase and Appwrite for the full Firebase replacement, PocketBase for the smallest possible footprint, and Meilisearch for search.

AI & Local Models

Ollama (Free)

The most-starred project in the directory at roughly 180,000 GitHub stars, under an MIT license. Ollama is a local LLM runtime that pulls and serves open models behind a simple API — the engine most self-hosted chat UIs sit on top of.

Open WebUI (Free)

A self-hosted chat UI for Ollama and OpenAI-compatible models, with roughly 151,000 GitHub stars under the Open WebUI license. It turns a local Ollama setup into a browser-based assistant with RAG and multi-user support. See also the AI chat and local LLM alternatives in the full list.

Ollama and Open WebUI are the two halves of a self-hosted AI stack: one serves the models, the other gives you a chat front end that keeps your prompts on your own hardware.

Notes & Docs

AppFlowy (Free)

An open-source Notion-style workspace with docs and databases, at roughly 76,000 GitHub stars under AGPL-3.0. It is the most direct Notion replacement in the directory, with a local-first core and self-hosting support.

AFFiNE (Free)

A knowledge base that mixes docs, whiteboards, and databases, with roughly 72,000 GitHub stars under an MIT license. Its whiteboard-plus-docs model goes beyond what a plain wiki can do.

Outline (Free)

A team wiki and knowledge base built for internal docs, at roughly 40,000 GitHub stars under BUSL-1.1. It is the pick when you specifically need a clean, fast internal wiki rather than a general notes tool.

These three solve the Notion problem in different ways: AppFlowy for the closest look-and-feel, AFFiNE for whiteboard-plus-docs, and Outline for a focused internal wiki.

Dev Tools & Communication

Hoppscotch (Free)

An open-source API development ecosystem with roughly 80,000 GitHub stars and an MIT license. It is the browser-first Postman alternative, with optional self-hosted sync.

PostHog (Free)

Product analytics, session replay, and feature flags in one suite, at roughly 40,000 GitHub stars and an MIT license. It is the fullest open-source answer to Mixpanel or Amplitude, and it self-hosts cleanly.

Rocket.Chat (Free)

An open-source team chat and omnichannel platform, with roughly 46,000 GitHub stars and an MIT license. It is the Slack replacement when internal chat plus customer-facing channels belong in one tool.

These three round out the everyday developer stack: Hoppscotch for API work, PostHog for product analytics, and Rocket.Chat for team communication.

Wrapping It Up

We compiled this list from a directory of 72 tools, and the pattern is clear: the projects teams actually deploy are the ones with a strong self-host story, a real community, and a clear answer to "which SaaS does this replace." Stars are a proxy, not a verdict — but combined with active maintenance and self-hosting support, they are a reliable signal.

These 12 are a good starting point, not the whole story. For the complete directory, see all 72 alternatives, or browse every tool by category on the OpenElse tools page and the self-hosted listings.

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OpenElse Editorial — OpenElse is a curated directory of open-source and self-hostable alternatives to developer SaaS, from Notion and Auth0 to Firebase and GitHub Copilot.