Open Source Alternatives
  • Alternatives
  • Categories
    Categories by size897 projects
    • Developer Tools464
    • AI & Machine Learning405
    • Web Development196
    • Business & Productivity195
    • Security & Monitoring130
    • Communication & Collaboration128
    • IT Management125
    • 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 Tools464
    • AI & Machine Learning405
    • Web Development196
    • Business & Productivity195
    • Security & Monitoring130
    • 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

Developer 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

578 projects, sorted by GitHub stars.

fmt

InCustomer Support

Fast, type-safe C++ formatting that replaces printf and iostreams

  • 25,884 GitHub stars
  • MITLicence MIT

compound-engineering-plugin

InAI & Machine Learning

Add CE planning and review workflows to agents

  • 25,625 GitHub stars
  • MITLicence MIT

TDengine

Alternative toInfluxDB Cloud

High-performance time-series database for IoT and telemetry

  • 25,171 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Database

Activepieces

Alternative toZapier

Build AI-powered automations and agents without vendor lock-in

  • 25,140 GitHub stars
  • MITLicence MIT

Turso

Alternative toPlanetScale

Edge SQLite database with multi-tenancy for serverless apps

  • 24,878 GitHub stars
  • MITLicence MIT
  • #Database

Simdjson

InDeveloper Tools

Parse gigabytes of JSON per second with SIMD instructions

  • 24,438 GitHub stars
  • Apache-2.0Licence Apache-2.0

open-seo

Alternative toSemrush

Open source alternative to Semrush and Ahrefs

  • 24,272 GitHub stars
  • MITLicence MIT

DwarfStar (ds4)

Alternative toHugging Face Inference Endpoints

Local inference engine for DeepSeek V4 Flash/PRO and GLM 5.2

  • 23,970 GitHub stars
  • MITLicence MIT
  • #LLM

RAG-Anything

Alternative toRagie AI

Comprehensive multimodal document processing framework

  • 23,910 GitHub stars
  • MITLicence MIT
  • #RAG

listmonk

Alternative toMailchimp

High-performance newsletter and mailing list manager

  • 23,880 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Email

Superfile

Alternative toDirectory Opus

Terminal file manager with multi-panel layout and 20+ themes

  • 23,876 GitHub stars
  • MITLicence MIT

OpenLogi

Alternative toLogitech Options+

Local-first Logitech control without accounts or telemetry

  • 23,860 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • Previous
  • 1
  • More pages
  • 15
  • 16
  • 17
  • More pages
  • 48
  • Next