Open Source Alternatives to Popular Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
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Build APIs like code with Git-native workspace
Stars
1,812Last commit
14 hours agoLicense
Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.
Open Source Alternative to:
Full-text search API with real-time indexing and crawling
Stars
1,938Last commit
2 days agoLicense
Apache-2.0
Cloud search API and crawler service supporting billions of documents, real-time indexing, autocomplete, faceted filtering, and multi-language text across any application.
Open Source Alternative to:
Create custom spaces to chat, game, and connect globally
Stars
2,029Last commit
14 hours agoLicense
MIT
Build your own community space for gaming, chatting, and hanging out with friends worldwide. Customize your environment for the perfect social experience.
Open Source Alternative to:
Unified API for all LLM providers with analytics
Stars
Stars growing over the last 30 days1,738Last commit
5 hours agoLicense
MIT
Route, manage, and analyze LLM requests across multiple providers with one API. Compatible with OpenAI format, includes usage analytics and performance monitoring.
Open Source Alternative to:
Secure, private, and decentralized file storage
Stars
2,554Last commit
5 hours agoLicense
AGPL-3.0
A peer-to-peer encrypted filesystem for secure file storage, sharing, and collaboration with end-to-end encryption and user-controlled data.
Open Source Alternative to:
AI code review that learns your team's standards
Stars
Stars growing over the last 30 days1,611Last commit
5 hours agoLicense
AGPL-3.0
Open source AI code reviewer that analyzes pull requests for quality, security, and performance while respecting your existing rules and model preferences.
Open Source Alternative to:
Serverless GPU compute with sub-second cold starts
Stars
1,850Last commit
1 day agoLicense
AGPL-3.0
Run GPU inference, task queues, and sandboxes on serverless infrastructure with sub-second cold starts, autoscaling, and support for your own AWS, GCP, or bare metal.
Open Source Alternative to:
Lightroom-compatible RAW editor, no subscription
Stars
Stars growing quickly over the last 30 days1,674Last commit
5 hours agoLicense
MIT
Non-destructive RAW photo editor for macOS, Linux, and Windows that reads Lightroom catalogs, presets, and camera profiles. Free, MIT licensed, built in Rust.
Open Source Alternative to:
Managed identity and access management for any app
Stars
2,152Last commit
9 hours agoLicense
Apache-2.0
Authgear is a managed IAM platform handling authentication, SSO, and user management for B2C and B2B apps, with biometrics, MFA, and zero-trust support.
Open Source Alternative to:
Encrypted, queryable backups for engineers who value time
Stars
Stars growing over the last 30 days2,171Last commit
10 hours agoLicense
ISC
Backup solution with CLI, API and UI interfaces. Clean defaults, easy deployment. Encrypted, queryable backups with deduplication and compression.
Open Source Alternative to:
Enterprise file sync, share, and collaboration platform
Stars
2,189Last commit
6 hours agoLicense
Apache-2.0
Self-hostable file platform for enterprises needing data sovereignty, real-time document collaboration, and compliance with GDPR, HIPAA, and other regulations.
Open Source Alternative to:
Collaborative content creation for technical teams
Stars
2,004Last commit
2 days agoLicense
AGPL-3.0
A powerful platform for technical writing, offering real-time collaboration, version control, and seamless integrations.
Open Source Alternative to:
Type 10x faster with AI-powered voice dictation
Stars
Stars growing over the last 30 days1,614Last commit
1 day agoLicense
MIT
Open source AI dictation app that transforms speech to text with context-aware formatting. Fast, accurate transcription for meetings, notes, and hands-free typing.
Open Source Alternative to:
Open source CI/CD platform that's faster and costs less
Stars
1,639Last commit
5 hours agoLicense
Unknown
Continuous integration and delivery platform offering faster builds, lower costs, and maintenance-free operations. Cut build times dramatically while reducing CI/CD expenses by 50%.
Open Source Alternative to:
Open-source feature flag management for seamless deployments
Stars
1,986Last commit
11 hours agoLicense
MIT
FeatBit is a fast, scalable feature flag service that enables risk mitigation and fosters business growth through controlled feature releases.
Open Source Alternative to:
Transform any song into karaoke with AI-powered vocals
Stars
Stars growing over the last 30 days1,547Last commit
3 days agoLicense
GPL-3.0
AI-powered karaoke software that separates vocals from any song, transcribes lyrics with word-level sync, scores your pitch in real-time, and includes dynamic backgrounds.
Open Source Alternative to:
Security framework that protects from within your product
Stars
1,570Last commit
20 days agoLicense
AGPL-3.0
Open-source security framework for threat detection, fraud prevention, and abuse monitoring. Self-hosted solution with built-in dashboard and risk scoring.
Open Source Alternative to:
Automated localization for modern development teams
Stars
2,033Last commit
6 months agoLicense
MIT
A developer-focused localization platform that automates translation workflows within your existing development pipeline and CI/CD processes.
Open Source Alternative to:
Self-hosted password vault built for teams and compliance
Stars
Stars growing over the last 30 days1,891Last commit
17 hours agoLicense
GPL-3.0
Collaborative password manager with folder-level access control, AES-256-GCM encryption, governance tools, and Linux password rotation, runs on your own servers.
Open Source Alternative to:
API management platform for developers and AI agents
Stars
2,131Last commit
2 days agoLicense
Apache-2.0
Open source API management platform that exposes databases as REST, routes microservice traffic, handles billing, and generates SDKs across multiple languages.
Open Source Alternative to:
Track your TV shows and movies on Android
Stars
2,167Last commit
13 hours agoLicense
Unknown
Android app for tracking TV shows and movies you're watching, have watched, or plan to watch, powered by TMDb data.
Open Source Alternative to:
Complete infrastructure monitoring with 25+ years of expertise
Stars
2,064Last commit
17 days agoLicense
GPL-2.0
Free open source IT monitoring solution for servers, networks, and applications. Trusted by 1M+ users worldwide with powerful alerting and enterprise-grade features.
Open Source Alternative to:
Open-source message stream built on Postgres
Stars
2,229Last commit
9 months agoLicense
MIT
Sequin offers a feature-rich messaging system with a simple HTTP API, providing RabbitMQ-like functionality without adding complexity to your stack.
Open Source Alternative to:
Privacy-first analytics for mobile and desktop apps
Stars
1,871Last commit
7 days agoLicense
AGPL-3.0
Open-source, self-hostable analytics platform for mobile and desktop apps, prioritizing user privacy and data control.
Open Source Alternative to:
Next-Gen ERD: Design, Explore, Document and Analyze your database.
Stars
2,199Last commit
3 months agoLicense
MIT
Azimutt is a powerful tool for seamlessly exploring, documenting, and optimizing large and complex databases.
Open Source Alternative to:
Parallel AI agent workspaces with Git and project context
Stars
Stars growing over the last 30 days1,417Last commit
1 day agoLicense
Apache-2.0
Run multiple AI coding agents in isolated Git worktrees, with cross-repo context, GitHub/Linear integrations, and support for Claude, Codex, Cursor, and more.
Open Source Alternative to:
Cloud-native framework for infrastructure from code
Stars
2,018Last commit
20 days agoLicense
Apache-2.0
Nitric automates cloud infrastructure provisioning from your application code for AWS, GCP and Azure
Open Source Alternative to:
Chat with private and local large language models
Stars
2,269Last commit
2 years agoLicense
MIT
A mobile app for interacting with private, local large language models that work offline and are optimized for Apple silicon.
Open Source Alternative to:
Simplify container deployment across environments
Stars
1,845Last commit
1 month agoLicense
Apache-2.0
Effortless container orchestration platform for seamless deployment, management, and monitoring of applications across multiple environments.
Open Source Alternative to:
Cross-system automation and knowledge base for accounting firms
Stars
1,722Last commit
6 months agoLicense
Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Privacy-first proof-of-work CAPTCHA without user friction
Stars
2,502Last commit
1 year agoLicense
AGPL-3.0
Privacy-focused proof-of-work CAPTCHA system that silently protects websites without tracking users or requiring image solving. Drop-in replacement for reCAPTCHA.
Open Source Alternative to:
Effortlessly split expenses with friends and groups
Stars
1,492Last commit
9 days agoLicense
MIT
Free, open-source expense sharing app with multi-currency support, unequal splits, and receipt uploads. Import from Splitwise and enjoy PWA functionality.
Open Source Alternative to:
AI-powered PostgreSQL management made simple
Stars
1,468Last commit
5 hours agoLicense
AGPL-3.0
Modern PostgreSQL database management with AI-powered filtering, natural language queries, and cloud sync. Focus on your data while AI handles complexity.
Open Source Alternative to:
Self-hosted SERP API for Google, Bing, Yandex, and more
Stars
Stars growing over the last 30 days1,578Last commit
2 days agoLicense
MIT
Query Google, Bing, Yandex, Baidu, DuckDuckGo, and Ecosia through one REST API. Self-host free under MIT, or use the managed cloud option.
Open Source Alternative to:
Secure collaboration platform with end-to-end encryption
Stars
2,556Last commit
10 months agoLicense
GPL-3.0
A comprehensive collaboration platform offering end-to-end encrypted messaging, file sharing, and video calls with enterprise-grade security and compliance features.
Open Source Alternative to:
AI agent workflows built natively into GitHub
Stars
Stars growing quickly over the last 30 days1,448Last commit
6 hours agoLicense
MIT
An open-source GitHub bot that runs AI agents to review PRs, triage issues, fix CI failures, and ship code using any LLM provider.
Open Source Alternative to:
Unlock Data's Potential with Open Source Power
Stars
1,444Last commit
5 hours agoLicense
Apache-2.0
Leverage advanced analytics with a modern PostgreSQL kernel. 100% open source for robust data solutions.
Open Source Alternative to:
Self-hostable omnichannel chatbot platform for agencies
Stars
Stars growing quickly over the last 30 days1,115Last commit
11 hours agoLicense
MIT
Open source agentic chat marketing platform you can self-host, white-label, and resell. Automate omnichannel conversations across WhatsApp, Messenger, Instagram, Telegram, Zalo, TikTok, Email, and Webchat with a flow builder, shared inbox, AI agents, CRM, and broadcasts.
Open Source Alternative to:
The modern GraphQL runtime
Stars
1,443Last commit
3 months agoLicense
Apache-2.0
Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.
Open Source Alternative to:
Local-first, offline-first no-code database platform
Stars
2,976Last commit
2 months agoLicense
AGPL-3.0
Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly
Open Source Alternative to:
Secure self-hosted cloud storage with end-to-end encryption
Stars
1,556Last commit
8 days agoLicense
Unknown
Lightweight, self-hosted cloud storage built with Rust and Vue.js. Features end-to-end encryption, file sharing, search capabilities, and Docker deployment.
Open Source Alternative to:
Local-first 2FA authenticator and password manager
Stars
1,572Last commit
13 days agoLicense
GPL-3.0
Open-source authenticator and password manager that stores 2FA tokens and passwords locally on your device, with zero-knowledge encryption and no account required.
Open Source Alternative to:
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