Open Source Alternatives
  • Alternatives
  • Categories
    Categories by size894 projects
    • Developer Tools463
    • AI & Machine Learning404
    • Web Development196
    • Business & Productivity194
    • Security & Monitoring129
    • Communication & Collaboration128
    • IT Management124
    • Cloud & Hosting108
    • Product & Project Management106
    • Data & Analytics104
    Browse all 21 categoriesDesign & Creative, LLMOps & AI Tooling and 9 more
  • Blog
  • Advertise
SearchNotion, Slack, password manager.../
Submit
Open Source Alternatives
  • Alternatives
    • Developer Tools463
    • AI & Machine Learning404
    • Web Development196
    • Business & Productivity194
    • Security & Monitoring129
    • Communication & Collaboration128
    • Browse all 21 categories
  • Blog
  • Advertise
Submit your project

New open source projects by email

The projects we add and every new guide. Free, unsubscribe any time.

Open Source Alternatives LogoOpen Source Alternatives

Handpicked Open Source Alternatives to Paid Softwares

Product

  • Categories
  • Tag
  • Advertise

Resources

  • Blog
  • Collection
  • Submit

Company

  • Privacy Policy
  • Terms of Service
  • Refund Policy
  • Sitemap

Alternatives

  • Claude Code
  • Jira
  • Notion
  • Slack
  • Linear
  • Wispr Flow
  • All alternatives
© 2026 Open Source Alternatives. All rights reserved.
Open SourceAlternatives

Tag

Self Hosted Open Source Tools

  • All
  • 3D Modeling
  • A/B Testing
  • AI Agents
  • AI Coding Assistant
  • AI SDK
  • AI Search Tools
  • API Development Tools
  • API Infrastructure
  • Authentication
  • Authorization
  • BaaS
  • Chat
  • Chatbots
  • CI/CD Platforms
  • Cloud Management
  • Cloud Native
  • Cloud Native
  • CMS
  • Coding
  • CRM
  • Customer Support
  • Cybersecurity
  • Data Visualization
  • Database
  • Developer Framework
  • Developer Tools
  • DevOps Tools
  • Docker Management
  • Documentation
  • Email
  • File Sharing
  • File Sync & Storage
  • Graphic Design
  • Headless CMS
  • Knowledge Base
  • Knowledge Management
  • LLM
  • LLMOps
  • Monitoring
  • No Code
  • Note-taking Apps
  • Open Core
  • Privacy Tools
  • Project Management
  • RAG
  • Security
  • Self Hosted
  • Server Management
  • Social Media
  • Testing
  • UI/UX Design
  • Video
  • Web Analytics
  • Web Browsers
  • Web Hosting
  • Web3
  • WebSocket Servers
  • Workflow Automation
  • Workflow Orchestration

420 projects, sorted by GitHub stars.

Remodex

InAI & Machine Learning

Control Codex agents from your iPhone, open source and free

  • 3,345 GitHub stars
  • Apache-2.0Licence Apache-2.0

Converse.js

Alternative toSlack

Self-hosted web-based XMPP chat client for any server

  • 3,301 GitHub stars
  • MPL-2.0Licence MPL-2.0
  • #Chat

Esp32 C3 Adblock

Alternative toNextDNS

Pi-hole-style DNS ad-blocker on a $2 ESP32-C3 board

  • 3,299 GitHub stars
  • MITLicence MIT

willow

Alternative toGoogle Home

Self-hosted Amazon Echo alternative for $50 ESP32 hardware

  • 3,127 GitHub stars
  • Apache-2.0Licence Apache-2.0

whishper

Alternative toHappy Scribe

Local speech-to-text transcription and subtitling with a web UI

  • 3,093 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

CloddsBot

Alternative to3Commas

AI trading agent for crypto, DeFi, and prediction markets

  • 2,989 GitHub stars
  • MITLicence MIT

LittleLink

Alternative toLinktree

Self-hosted link-in-bio page with no database or monthly fees

  • 2,952 GitHub stars
  • MITLicence MIT

vexa

Alternative toRecall.ai

Self-hosted meeting bot API for Meet, Teams, Zoom, and Jitsi

  • 2,894 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #Open Core

Paymenter

Alternative toWHMCS

Self-hosted billing for hosting providers, MIT licensed

  • 2,770 GitHub stars
  • MITLicence MIT

Trieve

Alternative toAlgolia

Hybrid search and RAG infrastructure for AI knowledge bases

  • 2,721 GitHub stars
  • MITLicence MIT

Open Wearables

Alternative toHHuman API

Open source health API for wearable device developers

  • 2,692 GitHub stars
  • MITLicence MIT

Quiet

Alternative toSlack

Peer-to-peer serverless chat app with no central server

  • 2,659 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Chat
  • Previous
  • 1
  • More pages
  • 25
  • 26
  • 27
  • More pages
  • 35
  • Next