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.
Built withDirstarterOpenAlternative is supported by these incredible partners and sponsors. Advertise with us
Common layer for composing and governing AI agents
Stars
Stars growing over the last 30 days11,066Last commit
1 hour agoLicense
Apache-2.0
Meta-harness that sits above Claude Code, Codex, and other AI agents to add policy enforcement, sandboxing, and real-time collaborative sessions.
Open Source Alternative to:
Secure cloud environments for enterprise AI agents
Stars
Stars growing over the last 30 days14,567Last commit
5 hours agoLicense
Apache-2.0
Provide AI agents with secure, isolated sandboxes featuring real-world tools, code execution, and enterprise-grade security. Trusted by 88% of Fortune 100 companies.
Open Source Alternative to:
Privacy-first offline maps for hiking, cycling & navigation
Stars
15,780Last commit
2 hours agoLicense
Apache-2.0
Free, open-source offline maps app with detailed trails, turn-by-turn navigation, and zero tracking. Perfect for hikers, cyclists, and travelers seeking privacy.
Open Source Alternative to:
Native desktop email with tracking, templates, and dark mode
Stars
17,945Last commit
1 hour agoLicense
GPL-3.0
Desktop email client for Mac, Windows, and Linux with unified inbox, read receipts, link tracking, send later, grammar checking, and contact enrichment.
Open Source Alternative to:
Secure, seamless authentication for modern applications
Stars
14,799Last commit
6 hours agoLicense
MPL-2.0
An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.
Open Source Alternative to:
Visual database for workflow automation across apps
Stars
15,651Last commit
2 months agoLicense
AGPL-3.0
AITable.ai offers a visual database platform that simplifies workflow automation and connects to over 6,000 apps through integrations like Zapier and Make.
Open Source Alternative to:
High-performance time-series database for massive data scale
Stars
17,476Last commit
2 hours agoLicense
Apache-2.0
Open-source time-series database offering massive ingestion throughput, millisecond queries, and SQL extensions, designed for optimal performance at any hardware scale.
Open Source Alternative to:
Open-source search and analytics at enterprise scale
Stars
13,911Last commit
2 hours agoLicense
Apache-2.0
Community-driven, Apache 2.0-licensed search and analytics suite for ingesting, searching, visualizing, and analyzing data at scale with AI/ML capabilities.
Open Source Alternative to:
Advanced terminal with modern features for Mac developers
Stars
18,217Last commit
3 hours agoLicense
GPL-2.0
Feature-rich terminal replacement for macOS with split panes, search, autocomplete, and extensive customization options for enhanced productivity.
Open Source Alternative to:
AI email assistant that automates, organizes, and declutters
Stars
Stars growing over the last 30 days12,821Last commit
2 hours agoLicense
AGPL-3.0
Automates Gmail and Outlook with AI-drafted replies, bulk unsubscribe, cold email blocking, attachment filing, and inbox analytics for individuals and teams.
Open Source Alternative to:
Self-hosted mail delivery platform for sending and receiving email
Stars
16,895Last commit
6 days agoLicense
MIT
Run your own mail delivery infrastructure with a web interface, webhooks, IP pools, and spam filtering integrations for inbound and outbound email.
Open Source Alternative to:
AI-native vector database for intuitive applications
Stars
16,918Last commit
5 hours agoLicense
BSD-3-Clause
Open-source vector database designed for building powerful, production-ready AI applications with hybrid search capabilities and flexible deployment options.
Open Source Alternative to:
On-device voice dictation for macOS with adaptive AI
Stars
Stars growing over the last 30 days12,468Last commit
1 day agoLicense
GPL-3.0
Free, open-source macOS dictation app that transcribes speech locally, polishes output with an on-device AI model, and adapts tone to whichever app you're typing into.
Open Source Alternative to:
Zero Trust VPN solutions for secure business networking
Stars
14,729Last commit
7 hours agoLicense
Unknown
Secure remote access VPN solutions with zero trust network access. Self-hosted and cloud-managed options for businesses of all sizes. Trusted by 20,000+ organizations.
Open Source Alternative to:
Streamline your business finances and operations
Stars
15,098Last commit
5 months agoLicense
AGPL-3.0
All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.
Open Source Alternative to:
Zero-knowledge encrypted notes that sync across all devices
Stars
14,831Last commit
7 hours agoLicense
GPL-3.0
End-to-end encrypted note-taking app with zero-knowledge architecture, cross-device sync, web clipper, and a self-hostable sync server.
Open Source Alternative to:
Secure and streamline database changes with CI/CD automation
Stars
14,640Last commit
2 hours agoLicense
MIT
Comprehensive platform for database schema migrations, security controls, and data masking with built-in review workflows and GitOps integration.
Build powerful AI agents with cutting-edge LLM technology
Stars
14,970Last commit
3 days agoLicense
MIT
A comprehensive platform for creating AI agents with intuitive tools, extensive integrations, and enterprise-grade features powered by the latest language models.
Open Source Alternative to:
Modern forum software for vibrant online communities
Stars
16,433Last commit
17 days agoLicense
MIT
Lightweight, extensible forum platform with a sleek interface, powerful moderation tools, and seamless integration capabilities.
Open Source Alternative to:
Secure, customizable authentication for your applications
Stars
15,334Last commit
4 days agoLicense
Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.
Open Source Alternative to:
Build full-stack apps with TypeScript and real-time sync
Stars
12,760Last commit
2 hours agoLicense
Unknown
Open-source reactive database that keeps your web and mobile apps in sync. Write everything in TypeScript with built-in auth, cron jobs, and AI integration.
Open Source Alternative to:
Ultra-fast data transformation for AI with lineage
Stars
11,755Last commit
2 hours agoLicense
Apache-2.0
Open-source ETL framework built in Rust for AI workloads. Features incremental processing, data lineage, and observability tools for semantic search and RAG applications.
Open Source Alternative to:
Client-side encryption for your cloud files
Stars
16,349Last commit
3 hours agoLicense
GPL-3.0
Encrypts files and filenames locally before they reach Dropbox, Google Drive, OneDrive, or any other cloud, so only you hold the key.
Open Source Alternative to:
Build beautiful documentation sites with Next.js
Stars
13,481Last commit
2 hours agoLicense
MIT
A flexible Next.js framework for creating stunning documentation sites with MDX support, built-in search, and customizable components.
Open Source Alternative to:
Centralize, transform, and stash your data
Stars
14,970Last commit
4 hours agoLicense
Unknown
Logstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired destination.
Open Source Alternative to:
Decentralized video platform for true digital freedom
Stars
15,366Last commit
5 hours agoLicense
AGPL-3.0
Create your own video hosting platform with PeerTube - a free, open-source alternative to YouTube. Join 600,000+ videos across 1,000+ interconnected platforms without ads or tracking.
Open Source Alternative to:
Remove Mac apps and all their leftover files
Stars
14,981Last commit
4 months agoLicense
Unknown
Mac app uninstaller that finds and removes associated files, orphaned leftovers, and development artifacts across macOS 13 and later.
Open Source Alternative to:
Open source messaging with privacy and community focus
Stars
10,662Last commit
2 hours agoLicense
AGPL-3.0
Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.
Open Source Alternative to:
Real-time analytics database for sub-second OLAP queries
Stars
14,095Last commit
5 hours agoLicense
Apache-2.0
Columnar, time-indexed analytics database built for streaming and batch data at scale, handling billions to trillions of rows with millisecond query response times.
Open Source Alternative to:
Unify, automate, and elevate your monitoring workflow
Stars
12,445Last commit
4 days agoLicense
MIT
Open-source platform for centralizing alerts, automating responses, and enhancing incident management across your tech stack.
Open Source Alternative to:
Create powerful chatbots without coding
Stars
10,580Last commit
10 hours agoLicense
Unknown
Design, build, and deploy interactive chatbots with a visual editor. Integrate easily and collect data effortlessly.
Open Source Alternative to:
Minimalistic AI-powered search engine for instant answers
Stars
11,910Last commit
2 months agoLicense
AGPL-3.0
Scira delivers concise, AI-generated responses to queries using a clean interface and powerful search capabilities.
Open Source Alternative to:
Free, open-source framework for cross-platform game development
Stars
14,573Last commit
3 hours agoLicense
Unknown
Build games in C# that run on Windows, macOS, Linux, iOS, Android, and major consoles. No royalties, no subscriptions, no runtime fees.
Open Source Alternative to:
Your all-in-one marketplace for digital creators and products
Stars
10,026Last commit
1 hour agoLicense
MIT
A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.
Open Source Alternative to:
Build your own federated discussion community
Stars
14,648Last commit
6 hours agoLicense
AGPL-3.0
Open-source forum and link aggregator that connects communities across the fediverse. Self-hosted, ad-free, with powerful moderation tools and federation.
Open Source Alternative to:
Professional status page system for transparent downtime communication
Stars
15,261Last commit
11 days agoLicense
Unknown
Open-source status page platform that helps organizations communicate system status and incidents effectively with customizable components and metrics tracking
Open Source Alternative to:
Voice-to-text that works offline, privately, on any app
Stars
Stars growing quickly over the last 30 days10,045Last commit
2 hours agoLicense
MIT
Dictation app powered by OpenAI Whisper and NVIDIA Parakeet. Runs locally on macOS, Windows, and Linux with zero data retention and 100+ language support.
Open Source Alternative to:
A free, open source, cross-platform video editor
Stars
15,501Last commit
4 hours agoLicense
GPL-3.0
Free, open-source video editor supporting 4K resolution, hundreds of formats, and professional features like Blackmagic Design integration across Windows, Mac, and Linux.
Open Source Alternative to:
Unified file management for your enterprise storage
Stars
14,830Last commit
20 hours agoLicense
AGPL-3.0
Filestash is an open-source file manager that integrates with multiple storage backends, authentication systems, and offers customization options.
Open Source Alternative to:
Complete production stack for AI teams
Stars
13,276Last commit
5 months agoLicense
MIT
Comprehensive AI platform with gateway, observability, guardrails, and prompt management. Access 1,600+ LLMs via unified API with enterprise-grade security.
Open Source Alternative to:
Open-source LLM tracing & evaluation for AI optimization
Stars
Stars growing over the last 30 days12,014Last commit
1 hour agoLicense
Elastic-2.0
Open-source platform for LLM tracing, evaluation, and optimization. Features automatic instrumentation, prompt playground, and real-time AI application monitoring.
Open Source Alternative to:
Collect, organize, cite, and share research in one place
Stars
15,758Last commit
2 hours agoLicense
Unknown
Reference manager that captures sources from the web, organizes them with tags and collections, and generates citations in 9,000+ styles for Word, LibreOffice, and Google Docs.
Open Source Alternative to:
People are looking for alternatives to...
View all alternatives
Spotify
Access millions of songs, podcasts, and playlists instantly with personalized recommendations and offline listening across all your devices.
2 alternatives
Claude Code
An agentic coding tool that runs in your terminal, reads your codebase, and executes tasks like writing features, fixing bugs, and running tests.
18 alternatives
Claude
A next generation AI assistant built for work and trained to be safe, accurate, and secure.
12 alternatives
CapCut
Free video editing app that lets you create professional-quality videos with advanced editing tools, effects, and templates for social media and beyond.
5 alternatives
Notion
An all-in-one workspace for note-taking, project management, knowledge sharing, and collaboration across teams.
22 alternatives
Lovable
Create fully functional applications by describing your idea, with AI-powered code generation and beautiful design
3 alternatives
Trending categories
View all categoriesSEO Tools
Tools that analyze website performance, optimize content visibility, track rankings, and improve search engine results.
AI 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.
CRM Systems
Customer relationship management systems for tracking contacts, deals, and pipelines, with activity history and sales reporting.
Social Media Management Tools
Tools for scheduling and managing posts on social media networks.
ERP Systems
Enterprise Resource Planning systems integrating various business functions.
Openlane – Open-source, developer-first platform for automated compliance, risk management, and built-in Trust Center.
Docmost
Stellar Hosted
InfluxDB