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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Modern open-source CRM that grows with your business
Stars
1,563Last commit
8 hours agoLicense
AGPL-3.0
Transform customer relationships with this intuitive open-source CRM. Features task management, sales pipeline tracking, and customizable data models.
Open Source Alternative to:
Encrypted, queryable backups for engineers who value time
Stars
2,037Last commit
23 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:
Security framework that protects from within your product
Stars
1,505Last commit
15 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:
Open-source feature flag management for seamless deployments
Stars
1,904Last commit
21 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:
Type 10x faster with AI-powered voice dictation
Stars
1,512Last commit
3 days 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:
Simplify container deployment across environments
Stars
1,847Last commit
20 hours agoLicense
Apache-2.0
Effortless container orchestration platform for seamless deployment, management, and monitoring of applications across multiple environments.
Open Source Alternative to:
Privacy-first analytics for mobile and desktop apps
Stars
1,784Last commit
16 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:
Managed identity and access management for any app
Stars
2,014Last commit
3 days 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:
Transform any song into karaoke with AI-powered vocals
Stars
1,426Last commit
21 hours 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:
Secure password manager with end-to-end encryption
Stars
2,922Last commit
1 year agoLicense
AGPL-3.0
Open-source password manager with end-to-end encryption for passwords, credit cards, notes, and documents. Cross-platform sync with secure sharing capabilities.
Open Source Alternative to:
Privacy-first proof-of-work CAPTCHA without user friction
Stars
2,486Last commit
11 months 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:
Cross-system automation and knowledge base for accounting firms
Stars
1,720Last commit
3 months agoLicense
Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Create custom spaces to chat, game, and connect globally
Stars
1,667Last commit
22 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:
Secure collaboration platform with end-to-end encryption
Stars
2,544Last commit
8 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 code review that learns your team's standards
Stars
1,333Last commit
14 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:
AI-powered PostgreSQL management made simple
Stars
1,435Last commit
2 days 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 AI agents and workflows across any channel
Stars
1,208Last commit
5 days agoLicense
AGPL-3.0
Build and run AI agents, agentic workflows, and multichannel automation on your own infrastructure, with memory, RAG, MCP tools, and full data control.
Open Source Alternative to:
The modern GraphQL runtime
Stars
1,443Last commit
2 days agoLicense
Apache-2.0
Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.
Open Source Alternative to:
Effortlessly split expenses with friends and groups
Stars
1,416Last commit
13 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:
Fast, scalable analytics infrastructure
Stars
1,661Last commit
5 months agoLicense
MIT
Open source analytics platform built on ClickHouse and Kafka, offering high-speed event tracking and real-time querying capabilities.
Open Source Alternative to:
Parallel AI agent workspaces with Git and project context
Stars
1,206Last commit
4 days 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:
All-in-one observability with unlimited data ingestion
Stars
1,702Last commit
16 hours agoLicense
AGPL-3.0
Unified platform for logs, metrics, traces and profiles with native compatibility for popular tools like OpenTelemetry, Prometheus, and Loki. No data silos, no usage limits.
Open Source Alternative to:
Self-hosted email marketing with unlimited everything
Stars
2,161Last commit
2 years agoLicense
MIT
Open-source email marketing platform offering unlimited subscribers, campaigns, and workspaces. Self-hosted solution with powerful API and beautiful interface.
Open Source Alternative to:
AI chat companion with versatile model support
Stars
1,531Last commit
9 months agoLicense
Apache-2.0
Open-source chat application that lets you interact with multiple AI models in one interface, offering flexible conversations and diverse capabilities.
Open Source Alternative to:
Unlock Data's Potential with Open Source Power
Stars
1,377Last commit
11 hours agoLicense
Apache-2.0
Leverage advanced analytics with a modern PostgreSQL kernel. 100% open source for robust data solutions.
Open Source Alternative to:
Cloud-native framework for infrastructure from code
Stars
2,015Last commit
7 months agoLicense
Apache-2.0
Nitric automates cloud infrastructure provisioning from your application code for AWS, GCP and Azure
Open Source Alternative to:
Cookie-less analytics for privacy-focused insights
Stars
1,740Last commit
9 months agoLicense
Apache-2.0
Track user behavior, custom events, and conversion funnels in real-time with a single line of code, all while maintaining GDPR compliance.
Open Source Alternative to:
Local-first 2FA authenticator and password manager
Stars
1,498Last commit
3 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:
Open-source knowledge management and collaboration platform
Stars
1,302Last commit
10 hours agoLicense
LGPL-2.1
XWiki is a flexible, feature-rich wiki software that helps organizations structure and share knowledge efficiently.
Open Source Alternative to:
Privacy-first analytics without cookies or tracking
Stars
1,140Last commit
10 hours agoLicense
AGPL-3.0
Get powerful web analytics with zero cookies, 100% GDPR compliance, and full data ownership. Lightweight 3KB script delivers real-time insights without compromising user privacy.
Open Source Alternative to:
Secure self-hosted cloud storage with end-to-end encryption
Stars
1,459Last commit
14 hours 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:
GitOps orchestration for infrastructure as code
Stars
1,269Last commit
20 hours agoLicense
MPL-2.0
Automate infrastructure changes with secure GitOps workflows. Plan, validate, and deploy Terraform, OpenTofu, and Pulumi directly from pull requests.
Open Source Alternative to:
Transform team email into efficient collaborative workflows
Stars
1,757Last commit
7 months agoLicense
AGPL-3.0
Streamline team communication with shared inboxes, unlimited email addresses, and customizable workflows. Perfect for modern businesses seeking organized email management.
Open Source Alternative to:
Transform your source code into stunning visuals
Stars
1,844Last commit
8 months agoLicense
MIT
Create beautiful, customizable images of your source code with ease, perfect for presentations, documentation, and social media sharing.
Unify APIs, databases, and services effortlessly
Stars
1,256Last commit
15 hours agoLicense
Apache-2.0
A powerful backend framework that simplifies API integration, enhances security, and boosts developer productivity for modern web applications.
Open Source Alternative to:
Powerful open-source business intelligence for data-driven decisions
Stars
1,009Last commit
1 day agoLicense
AGPL-3.0
Connect multiple data sources, build complex queries, create insightful visualizations, and organize powerful dashboards to make informed business decisions.
Open Source Alternative to:
Handcrafted minimal bookmark manager with advanced tagging system
Stars
1,283Last commit
24 days agoLicense
MIT
A private, open-source bookmark manager for power users and large libraries, with a powerful, clutter-free UI.
Open Source Alternative to:
Local-first notes app with no cloud, no AI, no tracking
Stars
1,335Last commit
4 days agoLicense
MIT
A privacy-focused, offline-first note-taking app that stores everything on your device, with Markdown, note linking, file attachments, LaTeX math, and bring-your-own sync.
Open Source Alternative to:
Open-source webhooks for seamless integrations
Stars
1,482Last commit
7 hours agoLicense
SSPL-1.0
Self-hosted webhook solution for effortless event-driven communication between applications, enhancing system interoperability and automation.
Open Source Alternative to:
Open-source testing agent for UI, API, security, accessibility & visual QA
Stars
1,134Last commit
25 days agoLicense
AGPL-3.0
Hercules is the first open-source testing agent, enabling zero-code, zero-maintenance UI, API, security, accessibility, and visual validations.
Open Source Alternative to:
Self-hosted SERP API for Google, Bing, Yandex, and more
Stars
1,318Last commit
1 month 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:
Firefox fork hardened for privacy, security, and freedom
Stars
1,308Last commit
10 hours agoLicense
Unknown
A Firefox-based browser that strips telemetry, blocks trackers, disables DRM, and ships with a content blocker out of the box.
Open Source Alternative to:
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Trending categories
View all categoriesAI Coding Agent Orchestrators
Tools that run and coordinate multiple AI coding agents in parallel across isolated git worktrees, also known as agent harnesses or agentic dev environments.
Voice Dictation Tools
Applications that convert spoken words into text for faster writing across any application.
ERP Systems
Enterprise Resource Planning systems integrating various business functions.
AI Coding Agents
Tools that take a task or issue and carry it to completion on their own: planning, editing files, running tests, and opening pull requests.
Subscription & Billing Management Tools
Platforms for managing recurring subscriptions and complex billing models.
Scraping Platforms & SDKs
Platforms and SDKs for building web scraping solutions.
Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.
Openlane
InfluxDB
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