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. 59 profiles published.

GitHub metrics snapshot: 2026-10-31

n8n

209.2k ★

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

Replaces: zapier, make

Ollama

185.5k ★

Get up and running with large language models locally.

Replaces: chatgpt

Open WebUI

157.4k ★

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

Replaces: chatgpt

Excalidraw

134.9k ★

Virtual whiteboard for sketching hand-drawn like diagrams.

Replaces: figma, miro

Supabase

114.4k ★

The open source Firebase alternative.

Replaces: firebase

LobeChat

83.6k ★

Open-source, modern-design AI chat framework.

Replaces: chatgpt

AppFlowy

78.0k ★

The open source alternative to Notion.

Replaces: notion

Grafana

77.6k ★

The open observability platform.

Replaces: datadog

AFFiNE

74.0k ★

There can be more than Notion and Miro.

Replaces: notion, miro

Strapi

73.4k ★

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

Replaces: contentful

NocoDB

65.4k ★

The open source Airtable alternative.

Replaces: airtable

Coolify

65.4k ★

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

Replaces: vercel, netlify, heroku

Penpot

61.9k ★

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

Replaces: figma

Plane

61.8k ★

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

Replaces: linear, jira

PocketBase

61.6k ★

Open Source realtime backend in 1 file.

Replaces: firebase

MinIO

61.3k ★

High performance, S3 compatible object storage.

Replaces: s3

Appwrite

57.8k ★

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

Replaces: firebase

Huginn

50.2k ★

Create agents that monitor and act on your behalf.

Replaces: zapier, ifttt

Cal.com

49.6k ★

Scheduling infrastructure for absolutely everyone.

Replaces: calendly

LibreChat

46.6k ★

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

Replaces: chatgpt

Rocket.Chat

46.4k ★

The open source omnichannel customer communication platform.

Replaces: slack, microsoft-teams

Payload CMS

45.6k ★

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

Replaces: contentful, strapi

Logseq

45.4k ★

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

Replaces: notion, roam-research

Appsmith

41.1k ★

Low-code project for building internal applications.

Replaces: retool, airtable

Outline

41.1k ★

The fastest knowledge base for growing teams.

Replaces: notion, confluence

PostHog

40.6k ★

All-in-one product analytics, session replay, feature flags, A/B testing.

Replaces: mixpanel, amplitude, google-analytics

Umami

39.8k ★

Simple, fast, privacy-focused alternative to Google Analytics.

Replaces: google-analytics

Directus

38.8k ★

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

Replaces: contentful, airtable

Chatwoot

38.7k ★

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

Replaces: intercom, zendesk

Keycloak

37.6k ★

Open Source Identity and Access Management for modern applications.

Replaces: auth0

Nextcloud

37.4k ★

The most deployed on-premises file share and collaboration platform.

Replaces: dropbox, google-drive, office-365

Dokku

32.2k ★

The smallest PaaS implementation you've ever seen.

Replaces: heroku

Plausible Analytics

29.7k ★

Simple, privacy-friendly Google Analytics alternative.

Replaces: google-analytics

Focalboard

26.5k ★

Open source, self-hosted alternative to Trello, Notion, and Asana.

Replaces: linear, trello, notion

Authentik

26.2k ★

The authentication glue you need.

Replaces: auth0

Zulip

26.1k ★

Open-source team chat that helps teams stay productive.

Replaces: slack

Activepieces

25.3k ★

AI-first, no-code workflow automation.

Replaces: zapier, make

Listmonk

24.1k ★

High performance, self-hosted newsletter and mailing list manager.

Replaces: mailchimp

Node-RED

23.8k ★

Low-code programming for event-driven applications.

Replaces: zapier, make

OpenObserve

22.6k ★

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

Replaces: datadog, elasticsearch

Docmost

22.2k ★

Open-source collaborative wiki and documentation software.

Replaces: notion, confluence

Matomo

22.0k ★

The Google Analytics alternative that protects your data.

Replaces: google-analytics

BookStack

19.1k ★

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

Replaces: notion, confluence

Windmill

18.3k ★

Open-source developer platform to turn scripts into workflows and UIs.

Replaces: zapier, retool, airplane

Seafile

15.4k ★

High performance file syncing and sharing, with also Markdown WYSIWYG editing.

Replaces: dropbox

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

13.6k ★

Secure decentralized communication built on Matrix.

Replaces: slack, signal

Formbricks

13.2k ★

Open source experience management. Free & self-hostable.

Replaces: typeform

Mautic

10.9k ★

The world's largest open source marketing automation platform.

Replaces: mailchimp, hubspot

Nhost

9.4k ★

The Open Source Firebase alternative with GraphQL.

Replaces: firebase

BigBlueButton

9.3k ★

Open source virtual classroom software.

Replaces: zoom

Baserow

6.3k ★

Open source no-code database and Airtable alternative.

Replaces: airtable

Papercups

6.1k ★

Open source live chat alternative to Intercom, Zendesk, Drift.

Replaces: intercom

Vikunja

5.9k ★

The open-source, self-hostable to-do app.

Replaces: todoist, linear

Jitsu

5.1k ★

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

Replaces: segment

RudderStack

4.5k ★

Warehouse-native CDP built for developers.

Replaces: segment

Trilium Notes

2.9k ★

Hierarchical note-taking application with focus on building large personal knowledge bases.

Replaces: notion, obsidian