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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Effortlessly manage events and sell tickets online
Stars
4,082Last commit
7 hours agoLicense
Unknown
Hi.Events is a comprehensive platform for event management and online ticket sales, offering features like QR code check-in, custom ticket types, and embeddable widgets.
Open Source Alternative to:
Self-hosted team workspace with chat, docs, and databases
Stars
5,173Last commit
7 months agoLicense
Apache-2.0
Local-first collaboration platform combining real-time chat, rich text pages, databases, and file management in a single self-hostable workspace.
Open Source Alternative to:
The definitive self-hosted URL shortener
Stars
5,374Last commit
2 days agoLicense
MIT
Keep control over all your shortened URLs by serving them under your own domains with this simple yet powerful tool.
Open Source Alternative to:
Build powerful websites with the open-source CMS
Stars
4,296Last commit
4 hours agoLicense
GPL-2.0
A flexible and extensible content management system for creating dynamic websites and digital experiences
Open Source Alternative to:
Craft flexible, powerful websites with ease
Stars
4,910Last commit
3 hours agoLicense
Unknown
A flat-file CMS that combines simplicity and flexibility, empowering developers to build custom websites without database complexity.
Open Source Alternative to:
Lightweight distributed storage for self-hosting
Stars
Stars growing over the last 30 days4,773Last commit
2 days agoLicense
AGPL-3.0
Self-contained distributed object storage with S3 API compatibility. Runs on minimal hardware, replicates data across 3 zones for maximum resilience.
Open Source Alternative to:
Stateful AI agents that remember, learn, and improve over time
Stars
Stars growing over the last 30 days3,712Last commit
3 hours agoLicense
Apache-2.0
Build persistent AI agents with continuous memory, scheduled tasks, and multi-channel communication via Slack, Discord, and Telegram, using your own API keys.
Open Source Alternative to:
A spreadsheet engine you can embed, self-host, or run in the browser
Stars
4,229Last commit
5 hours agoLicense
Apache-2.0
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.
Open Source Alternative to:
System-wide ad-blocking and privacy protection, no extensions needed
Stars
4,310Last commit
3 hours agoLicense
MIT
Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.
Open Source Alternative to:
YAML-defined workflow orchestration, no database required
Stars
Stars growing over the last 30 days4,450Last commit
6 hours agoLicense
GPL-3.0
Single-binary workflow orchestrator that runs scheduled DAGs locally or over SSH, with retries, human tasks, a built-in Web UI, and file-based state storage.
Open Source Alternative to:
Feature-rich backend that runs anywhere you need it
Stars
3,775Last commit
10 hours agoLicense
Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.
Open Source Alternative to:
Build powerful backends without leaving your browser
Stars
6,843Last commit
2 years agoLicense
Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.
Open Source Alternative to:
Open-source helpdesk for seamless customer support
Stars
4,618Last commit
17 hours agoLicense
AGPL-3.0
Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.
Open Source Alternative to:
Open-source platform for collecting and prioritizing feedback
Stars
4,590Last commit
6 days agoLicense
AGPL-3.0
A self-hosted community feedback tool that helps organizations gather, discuss, and prioritize user suggestions and feature requests.
Open Source Alternative to:
Open-source growth platform for customer-centric teams
Stars
4,100Last commit
9 hours agoLicense
AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.
Open Source Alternative to:
Open source security automation platform for builders
Stars
3,867Last commit
3 hours agoLicense
AGPL-3.0
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.
Open Source Alternative to:
Deploy apps instantly with git push - open source alternative
Stars
4,780Last commit
8 months agoLicense
MIT
Open source deployment platform that deploys apps directly from GitHub with zero-downtime, real-time logs, preview URLs, and support for Python, Node.js frameworks.
Open Source Alternative to:
Secure, policy-based access control for modern applications
Stars
4,632Last commit
11 hours agoLicense
Apache-2.0
A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions management.
Open Source Alternative to:
Free office suite with Microsoft compatibility
Stars
Stars growing over the last 30 days4,560Last commit
3 hours agoLicense
GPL-3.0
Complete free office suite compatible with Microsoft formats (.doc, .docx, .xls, .xlsx, .ppt, .pptx). Open source alternative with regular updates.
Open Source Alternative to:
Git-native feature management for developers
Stars
4,928Last commit
6 hours agoLicense
GPL-3.0
A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.
Open Source Alternative to:
Track coding time effortlessly, gain insights instantly
Stars
4,462Last commit
2 days agoLicense
MIT
Open-source, self-hosted time tracking solution for developers. Analyze coding habits, improve productivity, and visualize progress.
Open Source Alternative to:
High-performance graph computing for scalable data analysis
Stars
4,630Last commit
7 hours agoLicense
Unknown
Memgraph is a scalable, in-memory graph database solution offering high-performance computing and Neo4j compatibility.
Open Source Alternative to:
Open-source ticketing system for streamlined support
Stars
3,450Last commit
9 hours agoLicense
AGPL-3.0
Frappe Helpdesk consolidates customer issues, automates workflows, and empowers self-service to boost agent productivity and customer satisfaction.
Open Source Alternative to:
Open source observability platform for modern applications
Stars
4,305Last commit
5 days agoLicense
AGPL-3.0
Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
Stars growing over the last 30 days3,867Last commit
5 hours agoLicense
AGPL-3.0
A versatile open-source form builder for collecting data, managing submissions, and integrating with your favorite tools.
Open Source Alternative to:
Secure and elegant Matrix client for seamless conversations
Stars
3,945Last commit
3 hours agoLicense
AGPL-3.0
Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.
Open Source Alternative to:
Self-hosted photo management with full control
Stars
4,314Last commit
2 days agoLicense
MIT
Free photo management tool that runs on your server. Upload, organize, and share photos with beautiful interface, EXIF support, and complete privacy control.
Open Source Alternative to:
Your digital identity, beautifully organized
Stars
3,923Last commit
11 hours agoLicense
AGPL-3.0
A free, open-source link management platform for creating customizable, self-hosted link pages to showcase your online presence.
Open Source Alternative to:
Automate financial processes for smarter business decisions
Stars
3,965Last commit
1 day agoLicense
AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.
Open Source Alternative to:
One API to deploy and run agents on any model or machine
Stars
Stars growing quickly over the last 30 days3,269Last commit
3 hours agoLicense
Apache-2.0
Production-ready agent infrastructure that handles state, machines, permissions, and history so you don't have to build the platform yourself.
Open Source Alternative to:
Embedded storage engine built on object storage
Stars
Stars growing over the last 30 days3,593Last commit
4 hours agoLicense
Apache-2.0
SlateDB is an embedded storage engine that leverages object storage for durability, scalability, and simplified replication without the need for disk management.
Open Source Alternative to:
AI-powered platform for engineering LLM products
Stars
Stars growing over the last 30 days3,448Last commit
4 hours agoLicense
Apache-2.0
Laminar is an open-source platform that helps collect, understand, and utilize data for building high-quality LLM applications.
Open Source Alternative to:
Browser and notebook combined with local-first AI
Stars
3,610Last commit
2 months agoLicense
Apache-2.0
A browser that doubles as a personal notebook, letting you research, summarize, and take notes on web pages, PDFs, and videos without switching apps.
Open Source Alternative to:
Scalable SQL database for real-time analytics
Stars
4,446Last commit
5 hours agoLicense
Apache-2.0
Distributed SQL database designed for high-speed ingestion and complex queries on massive datasets, ideal for IoT and time-series data.
Open Source Alternative to:
Quick access to apps and files with keyboard shortcuts
Stars
4,613Last commit
4 days agoLicense
MIT
A keyboard-driven launcher that helps you quickly find and open applications, files, and bookmarks across Windows, macOS, and Linux
Open Source Alternative to:
Convert wearable data into actionable health insights with open algorithms
Stars
Stars growing over the last 30 days2,719Last commit
3 hours agoLicense
MIT
Self-hosted health intelligence platform with open algorithms, AI reasoning engine, and zero per-user fees. Connect Apple Health, Whoop, Garmin, Oura, and more.
Open Source Alternative to:
Next-gen WebSockets server for real-time apps
Stars
5,632Last commit
2 years agoLicense
AGPL-3.0
Open-source, Pusher-compatible WebSockets server that's simple, fast, and resilient for building real-time applications.
Open Source Alternative to:
Open-source code security engine for developers
Stars
Stars growing over the last 30 days3,243Last commit
2 days agoLicense
LGPL-2.1
Opengrep is a community-driven fork of SemgrepCE, providing accessible static code analysis and security scanning for developers.
Create stunning data visualizations with ease
Stars
4,064Last commit
7 days agoLicense
MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.
Open Source Alternative to:
Effortlessly split expenses with friends and roommates
Stars
3,023Last commit
5 days agoLicense
MIT
A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.
Open Source Alternative to:
Open source agency management tool for streamlined success
Stars
3,274Last commit
12 hours agoLicense
AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.
Open Source Alternative to:
Create engaging surveys and gather valuable insights
Stars
3,780Last commit
3 hours agoLicense
Unknown
LimeSurvey is a powerful open-source tool for creating customizable online surveys, polls, and questionnaires.
Open Source Alternative to:
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