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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Navigate anywhere offline with complete privacy
Stars
2,165Last commit
6 hours agoLicense
Apache-2.0
Offline navigation app for hiking, biking, and driving. No tracking, no data collection, community-driven maps. Works without internet connection.
Open Source Alternative to:
Serverless team chat over Tor, no phone number needed
Stars
2,659Last commit
2 days agoLicense
GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.
Open Source Alternative to:
Sell tickets for events, conferences, and exhibitions
Stars
2,541Last commit
17 hours agoLicense
Unknown
Full-stack ticketing platform covering online shop, point of sale, access control, and hardware for events of any size or industry.
Open Source Alternative to:
Secure password manager with end-to-end encryption
Stars
2,928Last commit
21 hours 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:
Comprehensive open-source HR management solution
Stars
1,457Last commit
8 hours agoLicense
LGPL-2.1
Horilla is a free, open-source HRMS that streamlines HR processes, from recruitment to offboarding, with customizable modules.
Open Source Alternative to:
AI-native CRM/ERP foundation with 80% already built
Stars
1,855Last commit
6 hours agoLicense
MIT
A modular CRM/ERP framework built on Next.js and TypeScript that encodes hundreds of architectural decisions so dev teams can ship production features in days, not months.
Open Source Alternative to:
OpenTelemetry observability with traces, logs, and metrics
Stars
1,836Last commit
14 hours agoLicense
Unknown
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.
Open Source Alternative to:
Turn bare metal into intelligent cloud infrastructure
Stars
2,258Last commit
9 hours agoLicense
Apache-2.0
Transform bare metal servers into a complete cloud platform with REST API for Kubernetes clusters, databases, VMs, and load balancers. Build your own cloud.
Open Source Alternative to:
Open-source CRM toolkit for personalized solutions
Stars
1,378Last commit
2 days agoLicense
MIT
Build a customizable CRM that matches your company's vision, designed for developers and loved by end users.
Open Source Alternative to:
Powerful, customizable web analytics for your site
Stars
2,695Last commit
3 days agoLicense
GPL-2.0
Open-source web analytics platform offering comprehensive visitor tracking, customizable dashboards, and data ownership for websites and applications.
Open Source Alternative to:
Open-source file storage with complete data sovereignty
Stars
1,925Last commit
15 hours agoLicense
AGPL-3.0
Secure, open-source platform for file storage, sharing, and collaboration. Host your data on your own infrastructure with full control and transparency.
Open Source Alternative to:
Data observability for modern data teams
Stars
2,421Last commit
2 days agoLicense
Apache-2.0
Elementary provides dbt-native data observability to detect issues, understand root causes, and resolve problems quickly in data pipelines.
Open Source Alternative to:
GPU orchestration across clouds, Kubernetes, and on-prem
Stars
2,283Last commit
8 hours agoLicense
MPL-2.0
Unified control plane for AI compute that provisions and schedules GPU workloads across any cloud, Kubernetes cluster, or bare-metal server.
Open Source Alternative to:
Business rules engine with AI, visual flows, and audit trails
Stars
2,065Last commit
2 days agoLicense
MIT
Model business logic in decision tables, visual flows, and natural-language rules. Change rules without deploys, test every path, and run the same engine anywhere.
Open Source Alternative to:
Self-hosted error tracking for full control and scalability
Stars
2,127Last commit
2 days agoLicense
Unknown
Bugsink offers real-time error tracking with self-hosting capabilities, allowing easy installation and connection to any app using Sentry-compatible SDKs.
Open Source Alternative to:
Terminal coding agent with full model and data control
Stars
1,736Last commit
6 hours agoLicense
MIT
Open-source AI coding agent for the terminal that works with 25+ model providers, keeps sessions on your disk, and ships as a single Go binary with no telemetry.
Open Source Alternative to:
Real-time stream processing made simple and affordable
Stars
2,269Last commit
3 days agoLicense
Apache-2.0
Timeplus is a lightweight, powerful, and cost-efficient stream processing platform for real-time analytics, deployed as a single binary.
Self-hosted email marketing with unlimited everything
Stars
2,173Last commit
3 days 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:
Simplify AWS SES email management with ease
Stars
2,302Last commit
4 months agoLicense
MIT
A comprehensive platform for managing transactional and marketing emails through AWS SES, featuring customer data management, SMS capabilities, and workflow automation.
Open Source Alternative to:
Build your custom learning academy in minutes
Stars
1,718Last commit
10 hours agoLicense
AGPL-3.0
Open source LMS designed for companies and training organizations. Create, manage, and deliver courses with AI support, customizable dashboards, and collaborative features.
Open Source Alternative to:
Unified API development ecosystem for modern teams
Stars
2,615Last commit
8 months agoLicense
AGPL-3.0
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
Open Source Alternative to:
Build APIs like code with Git-native workspace
Stars
1,819Last commit
9 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:
Simplify your workflow with offline Kanban boards
Stars
2,054Last commit
16 hours agoLicense
GPL-3.0
Kanri is a free, open-source personal Kanban app that works offline, offering a modern and simple experience while respecting your privacy.
Open Source Alternative to:
Open source monitoring for complex IT infrastructure
Stars
2,240Last commit
7 hours agoLicense
GPL-3.0
Monitor networks, servers, and cloud environments with flexible open-source solution. Custom checks, fast alerts, and complete infrastructure control.
Open Source Alternative to:
Local meeting recorder that keeps your audio off the cloud
Stars
1,550Last commit
11 hours agoLicense
MIT
Records meetings and voice memos locally using whisper.cpp, writes structured markdown to disk, and exposes 31 MCP tools so any AI agent can query your conversation history.
Open Source Alternative to:
Self-hosted CRM with built-in AI chat and agent tools
Stars
1,768Last commit
2 days agoLicense
AGPL-3.0
Open-source CRM with a built-in AI assistant, 37 MCP tools for external agents, custom fields, role-based permissions, and a REST API. No per-seat pricing.
Open Source Alternative to:
Open-source email marketing for the privacy-conscious
Stars
2,233Last commit
13 days agoLicense
AGPL-3.0
Self-hosted newsletter platform with powerful features, data protection, and full control over your mailing lists and campaigns.
Open Source Alternative to:
Full-text search API with real-time indexing and crawling
Stars
1,917Last 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:
Secure, private, and decentralized file storage
Stars
2,532Last commit
2 days 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:
Create custom spaces to chat, game, and connect globally
Stars
1,998Last commit
10 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
1,687Last commit
6 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:
Serverless GPU compute with sub-second cold starts
Stars
1,815Last commit
12 hours 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:
Automated localization for modern development teams
Stars
2,033Last commit
5 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:
Collaborative content creation for technical teams
Stars
2,004Last commit
4 days agoLicense
AGPL-3.0
A powerful platform for technical writing, offering real-time collaboration, version control, and seamless integrations.
Open Source Alternative to:
Enterprise file sync, share, and collaboration platform
Stars
2,154Last 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:
Next-Gen ERD: Design, Explore, Document and Analyze your database.
Stars
2,190Last commit
2 months agoLicense
MIT
Azimutt is a powerful tool for seamlessly exploring, documenting, and optimizing large and complex databases.
Open Source Alternative to:
Open source CI/CD platform that's faster and costs less
Stars
1,623Last commit
6 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 message stream built on Postgres
Stars
2,213Last commit
8 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:
Security framework that protects from within your product
Stars
1,546Last commit
9 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:
Encrypted, queryable backups for engineers who value time
Stars
2,087Last commit
14 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:
Track your TV shows and movies on Android
Stars
2,167Last commit
9 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:
Open-source feature flag management for seamless deployments
Stars
1,942Last commit
13 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:
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Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
Stellar Hosted
InfluxDB