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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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InfluxDB
Docmost
Capture
CodeRabbit
ScreenshotOne
Windshift
Sent
c15t
Sevalla
Openlane
Favicon of Ceph

Ceph

Scalable open-source distributed storage system

  • Stars

    17,011

  • Last commit

    9 hours ago

  • License

    Unknown
Ceph provides unified object, block, and file storage from a single cluster built on commodity hardware.

Open Source Alternative to:

Favicon of Amazon S3
Amazon S3
Favicon of Documenso

Documenso

Secure, open-source document signing for everyone

  • Stars

    14,933

  • Last commit

    9 hours ago

  • License

    AGPL-3.0
Streamline your document workflows with a powerful, privacy-focused e-signature platform that puts you in control of your data.

Open Source Alternative to:

Favicon of DocuSign
DocuSign
Favicon of Windmill

Windmill

Open-source workflow automation for developers

  • Stars

    17,811

  • Last commit

    7 hours ago

  • License

    Unknown
Powerful, self-hosted platform for building and running workflows, scripts, and apps with code-first approach and collaborative features.

Open Source Alternative to:

Favicon of Make
Make
Favicon of Bitwarden

Bitwarden

Secure password management for individuals and businesses

  • Stars

    20,095

  • Last commit

    7 hours ago

  • License

    Unknown
Bitwarden is an open source password manager that securely stores, shares, and autofills passwords across unlimited devices.

Open Source Alternative to:

Favicon of LastPass
LastPass
Favicon of Billion Mail

Billion Mail

AI
Open-source mail server with unlimited sending & AI tools

  • Stars

    15,550

  • Last commit

    3 months ago

  • License

    AGPL-3.0
Self-hosted email marketing platform with unlimited sending, AI-powered email creation, real-time analytics, and no monthly fees. Complete SMTP solution.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Trigger

Trigger

Run long-running AI tasks without timeouts or servers

  • Stars

    16,230

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Open source TypeScript platform for building and deploying AI agents and background workflows with retries, queues, observability, and elastic scaling.

Open Source Alternative to:

Favicon of Make
Make
Favicon of Apache APISIX

Apache APISIX

High-performance API gateway with built-in LLM support

  • Stars

    17,093

  • Last commit

    14 hours ago

  • License

    Apache-2.0
Apache APISIX is an open-source API gateway built on NGINX and etcd, offering dynamic routing, 100+ plugins, load balancing, authentication, and traffic management for APIs and LLM workloads.

Open Source Alternative to:

Favicon of Kong
Kong
Favicon of Turso

Turso

SQLite-compatible database for scalable multi-tenant applications

  • Stars

    17,208

  • Last commit

    13 days ago

  • License

    MIT
Turso provides a simple developer experience with SQLite compatibility, allowing you to build and scale multi-tenant applications with unlimited databases.

Open Source Alternative to:

Favicon of Supabase
Supabase
Favicon of Nuclear

Nuclear

Ad-free music player that streams from multiple sources

  • Stars

    18,409

  • Last commit

    17 hours ago

  • License

    AGPL-3.0
Open-source desktop music player for Windows, macOS, and Linux. Search artists and tracks across multiple sources, build playlists, and listen without ads or tracking.

Open Source Alternative to:

Favicon of Spotify
Spotify
Favicon of Audacity

Audacity

Professional audio editing made simple and free

  • Stars

    18,345

  • Last commit

    23 hours ago

  • License

    Unknown
Free, open-source audio editor and recorder for all platforms. Record, edit, mix and enhance audio with professional tools. Perfect for music, podcasts, and more.

Open Source Alternative to:

Favicon of Ableton Live
Ableton Live
Favicon of Apache Answer

Apache Answer

Open-source Q&A platform for knowledge sharing

  • Stars

    15,665

  • Last commit

    11 hours ago

  • License

    Apache-2.0
A versatile, community-driven Q&A platform that fosters collaboration and knowledge exchange within organizations and communities.

Open Source Alternative to:

Favicon of Skool
Skool
Favicon of Scalar

Scalar

Open-source API documentation and testing platform

  • Stars

    16,078

  • Last commit

    8 hours ago

  • License

    MIT
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.

Open Source Alternative to:

Favicon of Postman
Postman
Favicon of VictoriaMetrics

VictoriaMetrics

High-performance time series database for metrics and logs

  • Stars

    17,679

  • Last commit

    24 hours ago

  • License

    Apache-2.0
Time series database and monitoring platform compatible with Prometheus, handling billions of metrics with lower resource usage than most alternatives.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of Spree Commerce

Spree Commerce

Open source headless commerce with REST API, no platform fees, built for B2B and marketplaces

  • Stars

    15,675

  • Last commit

    7 hours ago

  • License

    BSD-3-Clause
Headless eCommerce platform with REST API, TypeScript SDK, and Next.js storefront. Handle B2B, multi-vendor marketplaces, and cross-border commerce. Self-hosted, open source, zero fees.

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of Leon

Leon

AI
Your open-source personal assistant for server automation

  • Stars

    17,496

  • Last commit

    1 day ago

  • License

    MIT
Leon is an AI-powered virtual assistant that lives on your server, automating tasks and managing your digital life with privacy and customization.

Open Source Alternative to:

Favicon of ChatGPT
ChatGPT
Favicon of LibreTranslate

LibreTranslate

Free offline machine translation API you can host yourself

  • Stars

    16,317

  • Last commit

    5 days ago

  • License

    AGPL-3.0
Self-hosted machine translation API that works offline. Download, setup, and run your own translation server in minutes with complete privacy control.

Open Source Alternative to:

Favicon of Google Translate
Google Translate
Favicon of Harper

Harper

Fast grammar checking that respects your privacy

  • Stars

    15,023

  • Last commit

    7 hours ago

  • License

    Apache-2.0
Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.

Open Source Alternative to:

Favicon of Grammarly
Grammarly
Favicon of AITable

AITable

Visual database for workflow automation across apps

  • Stars

    15,589

  • Last commit

    2 days ago

  • License

    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:

Favicon of Airtable
Airtable
Favicon of WooCommerce

WooCommerce

Open-source ecommerce platform for WordPress

  • Stars

    10,494

  • Last commit

    7 hours ago

  • License

    GPL-2.0
Build and manage online stores with customizable features, extensions, and themes for businesses of all sizes.

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of ActivityWatch

ActivityWatch

Track time automatically with privacy-first design

  • Stars

    18,834

  • Last commit

    8 hours ago

  • License

    MPL-2.0
Free open-source time tracker that automatically monitors your device usage. Cross-platform support with local data storage for complete privacy.

Open Source Alternative to:

Favicon of WakaTime
WakaTime
Favicon of Midday

Midday

Streamline your business finances and operations

  • Stars

    14,970

  • Last commit

    3 months ago

  • License

    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:

Favicon of YNAB
YNAB
Favicon of Rybbit

Rybbit

Understand your audience with privacy-first analytics.

  • Stars

    12,939

  • Last commit

    4 days ago

  • License

    AGPL-3.0
Get next-gen, open-source, and cookieless web analytics. Understand user behavior with session replays, real-time data, and web vitals. GDPR/CCPA compliant.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Formbricks

Formbricks

Privacy-first survey and experience management platform

  • Stars

    12,907

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Collect feedback across websites, apps, and emails with targeted surveys, user segmentation, and GDPR-compliant data handling. Self-host or use the cloud.

Open Source Alternative to:

Favicon of Google Forms
Google Forms
Favicon of OpenProject

OpenProject

Classic, agile, or hybrid project management, self-hosted

  • Stars

    16,051

  • Last commit

    7 hours ago

  • License

    GPL-3.0
Full-featured project management platform with Gantt charts, agile boards, time tracking, and team collaboration. Self-host or use managed cloud hosting.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Zitadel

Zitadel

Secure, customizable identity infrastructure for developers

  • Stars

    14,959

  • Last commit

    10 hours ago

  • License

    AGPL-3.0
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

Open Source Alternative to:

Favicon of Supabase
Supabase
Favicon of Logto

Logto

Secure, seamless authentication for modern applications

  • Stars

    14,517

  • Last commit

    9 hours ago

  • License

    MPL-2.0
An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

Open Source Alternative to:

Favicon of Auth0
Auth0
Favicon of Organic Maps

Organic Maps

Privacy-first offline maps for hiking, cycling & navigation

  • Stars

    15,348

  • Last commit

    9 hours ago

  • License

    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:

Favicon of Google Maps
Google Maps
Favicon of Coder

Coder

AI
Fast, secure cloud development environments on your infrastructure

  • Stars

    14,399

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Self-hosted development platform that enables secure, scalable remote coding with automated provisioning, reduced cloud costs, and enterprise-grade security.

Open Source Alternative to:

Favicon of GitHub Codespaces
GitHub Codespaces
Favicon of QuestDB

QuestDB

High-performance time-series database for massive data scale

  • Stars

    17,310

  • Last commit

    8 hours ago

  • License

    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:

Favicon of InfluxDB
InfluxDB
Favicon of OpenSearch

OpenSearch

Open-source search and analytics at enterprise scale

  • Stars

    13,681

  • Last commit

    22 hours ago

  • License

    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:

Favicon of ElasticSearch
ElasticSearch
Favicon of iTerm 2

iTerm 2

Advanced terminal with modern features for Mac developers

  • Stars

    18,024

  • Last commit

    15 hours ago

  • License

    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:

Favicon of Warp
Warp
Favicon of Weaviate

Weaviate

AI
AI-native vector database for intuitive applications

  • Stars

    16,793

  • Last commit

    7 hours ago

  • License

    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:

Favicon of Supabase
Supabase
Favicon of FluidVoice

FluidVoice

AI
On-device voice dictation for macOS with adaptive AI

  • Stars

    11,318

  • Last commit

    9 hours ago

  • License

    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:

Favicon of Wispr Flow
Wispr Flow
Favicon of OpenVPN

OpenVPN

Zero Trust VPN solutions for secure business networking

  • Stars

    14,518

  • Last commit

    8 hours ago

  • License

    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:

Favicon of Cloudflare Tunnel
Cloudflare Tunnel
Favicon of E2B

E2B

AI
Secure cloud environments for enterprise AI agents

  • Stars

    13,710

  • Last commit

    19 hours ago

  • License

    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:

Favicon of Daytona
Daytona
Favicon of Flarum

Flarum

Modern forum software for vibrant online communities

  • Stars

    16,391

  • Last commit

    12 days ago

  • License

    MIT
Lightweight, extensible forum platform with a sleek interface, powerful moderation tools, and seamless integration capabilities.

Open Source Alternative to:

Favicon of Skool
Skool
Favicon of SuperTokens

SuperTokens

Secure, customizable authentication for your applications

  • Stars

    15,295

  • Last commit

    4 days ago

  • License

    Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

Open Source Alternative to:

Favicon of Auth0
Auth0
Favicon of Pearcleaner

Pearcleaner

Remove Mac apps and all their leftover files

  • Stars

    14,559

  • Last commit

    3 months ago

  • License

    Unknown
Mac app uninstaller that finds and removes associated files, orphaned leftovers, and development artifacts across macOS 13 and later.

Open Source Alternative to:

Favicon of CCleaner
CCleaner
Favicon of Botpress

Botpress

AI
Build powerful AI agents with cutting-edge LLM technology

  • Stars

    14,898

  • Last commit

    4 days ago

  • License

    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:

Favicon of Manychat
Manychat
Favicon of Scira

Scira

AI
Minimalistic AI-powered search engine for instant answers

  • Stars

    11,863

  • Last commit

    27 days ago

  • License

    AGPL-3.0
Scira delivers concise, AI-generated responses to queries using a clean interface and powerful search capabilities.

Open Source Alternative to:

Favicon of Perplexity
Perplexity
Favicon of Inbox Zero

Inbox Zero

AI email assistant that automates, organizes, and declutters

  • Stars

    12,166

  • Last commit

    8 hours ago

  • License

    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:

Favicon of Superhuman Mail
Superhuman Mail
Favicon of Notesnook

Notesnook

Zero-knowledge encrypted notes that sync across all devices

  • Stars

    14,551

  • Last commit

    9 hours ago

  • License

    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:

Favicon of Notion
Notion
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Access millions of songs, podcasts, and playlists instantly with personalized recommendations and offline listening across all your devices.
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Tools that run and coordinate multiple AI coding agents in parallel across isolated git worktrees, also known as agent harnesses or agentic dev environments.
Favicon of OrcaFavicon of PaseoFavicon of Omnigent
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