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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Secure, customizable e-signatures for modern businesses
Stars
7,230Last commit
3 days agoLicense
AGPL-3.0
A powerful, open-source e-signature solution offering customization, integration, and enhanced security for businesses of all sizes.
Open Source Alternative to:
Full-stack observability without code changes
Stars
8,002Last commit
18 hours agoLicense
Apache-2.0
Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.
Open Source Alternative to:
Comprehensive monitoring and incident management platform
Stars
7,795Last commit
1 hour agoLicense
Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
Open Source Alternative to:
Run a team of AI agents together on your desktop
Stars
Stars growing quickly over the last 30 days5,875Last commit
1 hour agoLicense
Other
Desktop app that lets multiple AI agents collaborate as a team, using your existing ChatGPT, Claude, Gemini, or Grok plans, with workspaces and conversations stored locally.
Open Source Alternative to:
Simplify expense management for businesses of all sizes
Stars
5,088Last commit
1 hour agoLicense
MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.
Modular auth, payments, emails, and analytics for your product
Stars
6,886Last commit
2 days agoLicense
Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Open Source Alternative to:
Dashboard for running multiple coding agents in parallel
Stars
Stars growing over the last 30 days6,203Last commit
1 hour agoLicense
Apache-2.0
Desktop app that runs 25+ coding agents simultaneously, each isolated in its own Git worktree, so you can orchestrate code changes without switching tools.
Open Source Alternative to:
Visual app builder that integrates with your existing codebase
Stars
7,149Last commit
17 hours agoLicense
MIT
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.
Open Source Alternative to:
Open-source serverless CMS for modern web projects
Stars
8,048Last commit
2 hours agoLicense
MIT
A powerful, scalable platform for building custom websites and apps with serverless architecture, offering flexibility and cost-efficiency.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,471Last commit
18 hours agoLicense
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Open Source Alternative to:
Unify vector search and graph traversals in one database
Stars
6,268Last commit
8 hours agoLicense
Apache-2.0
Rust-built native graph-vector database combining vector similarity search and graph traversals. 10x faster development with unified architecture, sub-1ms queries.
Open Source Alternative to:
Desktop SQL client with built-in MCP for AI agent access
Stars
Stars growing over the last 30 days5,395Last commit
12 hours agoLicense
Apache-2.0
Desktop database client for PostgreSQL, MySQL/MariaDB, SQLite, and 14+ more databases, with a built-in MCP server, SQL notebooks, visual query builder, and a plugin system.
Open Source Alternative to:
Open-source cloud communications platform for developers
Stars
8,162Last commit
5 hours agoLicense
MIT
Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.
Open Source Alternative to:
The tensor database for AI data
Stars
9,264Last commit
6 months agoLicense
Apache-2.0
Deep Lake is an open-source database for storing, querying and managing complex AI data like images, audio, and embeddings.
Open Source Alternative to:
Unified observability database for metrics, logs, and traces
Stars
6,789Last commit
1 hour agoLicense
Apache-2.0
Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
Open Source Alternative to:
Auto-generated network diagrams that stay current
Stars
5,941Last commit
18 hours agoLicense
AGPL-3.0
Discovers your network via SNMP, LLDP, and ARP, then builds and maintains L2/L3 topology diagrams, host inventories, and service dependency maps automatically.
Open Source Alternative to:
Self-hosted file sharing built for digital sovereignty
Stars
6,286Last commit
11 hours agoLicense
Apache-2.0
Self-hostable cloud file management and collaboration platform with an integrated office suite, zero-trust security, and GDPR compliance for teams and organizations.
Open Source Alternative to:
Automate crypto trading with open-source strategies
Stars
Stars growing over the last 30 days6,899Last commit
3 days agoLicense
GPL-3.0
OctoBot is an open-source platform for automated cryptocurrency trading, offering customizable strategies and easy integration with exchanges.
Open Source Alternative to:
Secure email, calendar and contacts with end-to-end encryption
Stars
8,124Last commit
13 hours agoLicense
GPL-3.0
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.
Open Source Alternative to:
Build stateful backends with in-memory actors
Stars
Stars growing over the last 30 days6,702Last commit
9 hours agoLicense
Apache-2.0
Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.
Open Source Alternative to:
Secure collaboration with end-to-end encryption
Stars
8,052Last commit
17 hours agoLicense
AGPL-3.0
Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.
Open Source Alternative to:
Open-source legal AI that law firms control and extend
Stars
4,422Last commit
1 hour agoLicense
AGPL-3.0
Self-hostable alternative to Harvey and Legora with document analysis, contract drafting, tabular review, and reusable workflows. Zero licensing costs, full data control.
Open Source Alternative to:
Browser-based IMAP webmail with a full email client feel
Stars
7,258Last commit
21 hours agoLicense
GPL-3.0
PHP-based webmail client with MIME support, address book, folder management, threaded views, PGP encryption, and a plugin API for self-hosted email.
Open Source Alternative to:
Transform SQL into beautiful data stories
Stars
7,093Last commit
6 hours agoLicense
MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Open Source Alternative to:
Run 60+ AWS services locally, free forever
Stars
Stars growing over the last 30 days5,108Last commit
8 hours agoLicense
MIT
MIT-licensed AWS emulator running 60+ services in a single Docker container. Drop-in replacement for LocalStack with real Postgres, Redis, and Docker containers.
Open Source Alternative to:
Build reliable AI apps with comprehensive observability
Stars
6,270Last commit
9 days agoLicense
Apache-2.0
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.
Open Source Alternative to:
Ad-free photo sharing with privacy and federation
Stars
7,140Last commit
3 hours agoLicense
AGPL-3.0
Decentralized photo sharing platform with chronological feeds, privacy controls, and ActivityPub federation. No ads, no algorithms, just authentic connections.
Open Source Alternative to:
Launch Your Store in Minutes, No Code Needed
Stars
5,538Last commit
21 hours agoLicense
MIT
Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.
Open Source Alternative to:
Organize and secure your documents in one central hub
Stars
Stars growing over the last 30 days5,714Last commit
7 hours agoLicense
AGPL-3.0
A document management platform that helps you archive, organize, and search files with email ingestion, tagging capabilities, and powerful search functionality.
Open Source Alternative to:
Flexible project management you can host yourself
Stars
6,072Last commit
4 hours agoLicense
GPL-2.0
Self-hosted project management web app built on Ruby on Rails with issue tracking, time logging, SCM integration, and multi-project support across any database.
Open Source Alternative to:
Programmable notes with queries, Lua scripting, and wiki links
Stars
Stars growing over the last 30 days6,466Last commit
2 hours agoLicense
MIT
A self-hosted, browser-based note-taking system that turns plain Markdown pages into a queryable, scriptable knowledge base you control.
Open Source Alternative to:
Create privacy-first static websites with ease
Stars
7,392Last commit
3 days agoLicense
GPL-3.0
Desktop CMS for building fast, secure static websites with zero technical complexity. GDPR & CCPA compliant with one-click deployment.
Open Source Alternative to:
Time-series database built for industrial IoT workloads
Stars
6,427Last commit
1 hour agoLicense
Apache-2.0
Apache IoTDB manages industrial IoT time-series data with high-throughput read/write, edge-cloud sync, ultra-high compression, and integrations with Hadoop, Spark, Flink, and Grafana.
Open Source Alternative to:
Sync and transform data from any source to any destination
Stars
6,553Last commit
16 hours agoLicense
MPL-2.0
CloudQuery is an open-source ELT platform that enables easy data integration from hundreds of cloud and security tools to any destination.
Open Source Alternative to:
Complete office suite for documents, spreadsheets & more
Stars
7,095Last commit
11 days agoLicense
AGPL-3.0
Open-source online editor for documents, spreadsheets, presentations, and PDFs. Features real-time collaboration, AI integration, and accessibility tools.
Open Source Alternative to:
Automated translations that scale with your code and commits
Stars
5,404Last commit
3 days agoLicense
Apache-2.0
Transform your app into a global product with AI-powered localization that integrates directly into your development workflow. Supports 83+ languages with Git-native automation.
Open Source Alternative to:
Virtual office platform for engaging remote collaboration
Stars
5,914Last commit
14 hours agoLicense
Unknown
Create customizable virtual workspaces for remote teams to interact naturally, host events, and collaborate through spontaneous conversations and scheduled meetings.
Open Source Alternative to:
Smart desktop AI assistant with powerful local knowledge features
Stars
5,371Last commit
23 hours agoLicense
Unknown
Cross-platform desktop AI assistant supporting multiple providers, local knowledge base, and custom prompts. Integrates MCP protocol for enhanced AI tool capabilities.
Open Source Alternative to:
Open source kanban boards with unlimited everything
Stars
5,886Last commit
10 hours agoLicense
AGPL-3.0
Free kanban project management with unlimited boards, lists, and cards. Import Trello boards, collaborate with teams, and self-host for complete control.
Open Source Alternative to:
Open-source BI for modern data teams
Stars
6,223Last commit
1 hour agoLicense
MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.
Open Source Alternative to:
AI-powered embedded AR/AP automation for platforms
Stars
8,360Last commit
2 years agoLicense
AGPL-3.0
Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.
Open Source Alternative to:
Self-hosted group chat without recurring subscription fees
Stars
4,817Last commit
2 days agoLicense
MIT
Install your own group chat system with @mentions, DMs, and mobile support. One-time purchase, no monthly fees. Includes full source code for customization.
Open Source Alternative to:
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Stellar Hosted – Managed Open Source software hosting in the EU: secure, compliant, fast.
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