S SwapToSaaS

Tool profiles

One page per open-source project we recommend: what it replaces, how hard it is to self-host, licence class, and live GitHub activity. 45 profiles published.

GitHub metrics snapshot: 2026-09-02

n8n

203.2k ★

Free and source-available fair-code licensed workflow automation tool.

Replaces: zapier, make

Ollama

180.0k ★

Get up and running with large language models locally.

Replaces: chatgpt

Open WebUI

150.7k ★

Extensible, feature-rich, self-hosted ChatGPT-like WebUI.

Replaces: chatgpt

Excalidraw

131.0k ★

Virtual whiteboard for sketching hand-drawn like diagrams.

Replaces: figma, miro

Supabase

108.7k ★

The open source Firebase alternative.

Replaces: firebase

LobeChat

82.2k ★

Open-source, modern-design AI chat framework.

Replaces: chatgpt

Grafana

76.6k ★

The open observability platform.

Replaces: datadog

AppFlowy

76.2k ★

The open source alternative to Notion.

Replaces: notion

Strapi

73.1k ★

Design APIs fast, manage content easily. Leading Open-Source Headless CMS.

Replaces: contentful

AFFiNE

72.1k ★

There can be more than Notion and Miro.

Replaces: notion, miro

NocoDB

64.8k ★

The open source Airtable alternative.

Replaces: airtable

MinIO

61.4k ★

High performance, S3 compatible object storage.

Replaces: s3

Coolify

61.3k ★

An open-source & self-hostable Heroku / Netlify / Vercel alternative.

Replaces: vercel, netlify, heroku

PocketBase

60.9k ★

Open Source realtime backend in 1 file.

Replaces: firebase

Penpot

59.5k ★

The open-source design tool for design & code collaboration.

Replaces: figma

Plane

58.8k ★

Open source project management tool. Alternative to Jira, Linear, Height.

Replaces: linear, jira

Appwrite

57.2k ★

Build like a team of hundreds. Open-source backend server.

Replaces: firebase

Huginn

49.9k ★

Create agents that monitor and act on your behalf.

Replaces: zapier, ifttt

Cal.com

48.1k ★

Scheduling infrastructure for absolutely everyone.

Replaces: calendly

Rocket.Chat

46.1k ★

The open source omnichannel customer communication platform.

Replaces: slack, microsoft-teams

Logseq

44.7k ★

A privacy-first, open-source platform for knowledge management and collaboration.

Replaces: notion, roam-research

Payload CMS

44.5k ★

The next-generation Headless CMS and application framework built with TypeScript.

Replaces: contentful, strapi

LibreChat

42.7k ★

Enhanced ChatGPT clone with agents, DALL-E, RAG, and multi-modal chat.

Replaces: chatgpt

Appsmith

40.8k ★

Low-code project for building internal applications.

Replaces: retool, airtable

Directus

37.7k ★

Modern Open-Source Data Platform. Instant APIs & Apps for any SQL Database.

Replaces: contentful, airtable

Keycloak

36.6k ★

Open Source Identity and Access Management for modern applications.

Replaces: auth0

Chatwoot

36.4k ★

Open-source live-chat, email support, omni-channel desk.

Replaces: intercom, zendesk

Dokku

32.1k ★

The smallest PaaS implementation you've ever seen.

Replaces: heroku

Zulip

25.8k ★

Open-source team chat that helps teams stay productive.

Replaces: slack

Authentik

25.3k ★

The authentication glue you need.

Replaces: auth0

Activepieces

24.2k ★

AI-first, no-code workflow automation.

Replaces: zapier, make

Node-RED

23.6k ★

Low-code programming for event-driven applications.

Replaces: zapier, make

OpenObserve

21.6k ★

10x easier, 140x lower storage cost, high performance observability platform.

Replaces: datadog, elasticsearch

Docmost

21.6k ★

Open-source collaborative wiki and documentation software.

Replaces: notion, confluence

BookStack

19.0k ★

A simple, self-hosted, easy-to-use platform for organising and storing information.

Replaces: notion, confluence

SuperTokens

15.3k ★

Open source alternative to Auth0 / Firebase Auth / AWS Cognito.

Replaces: auth0

CapRover

15.2k ★

Scalable PaaS (automated Docker + Nginx cluster manager).

Replaces: heroku, vercel

Automatisch

14.0k ★

The open source Zapier alternative.

Replaces: zapier

Element

13.4k ★

Secure decentralized communication built on Matrix.

Replaces: slack, signal

Formbricks

12.9k ★

Open source experience management. Free & self-hostable.

Replaces: typeform

Mautic

10.4k ★

The world's largest open source marketing automation platform.

Replaces: mailchimp, hubspot

Nhost

9.3k ★

The Open Source Firebase alternative with GraphQL.

Replaces: firebase

BigBlueButton

9.2k ★

Open source virtual classroom software.

Replaces: zoom

Baserow

5.8k ★

Open source no-code database and Airtable alternative.

Replaces: airtable

Jitsu

5.1k ★

An open-source Segment alternative. Fully-scriptable data ingestion engine.

Replaces: segment