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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
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Favicon of FalkorDB

FalkorDB

AI
Graph database built for GraphRAG and multi-tenant AI apps

  • Stars

    5,946

  • Last commit

    8 hours ago

  • License

    SSPL-1.0
Graph database using sparse matrix representation and linear algebra to deliver ultra-low latency Cypher queries, native multi-tenancy, and built-in GraphRAG support for AI applications.

Open Source Alternative to:

Favicon of TigerGraph
TigerGraph
Favicon of Kan

Kan

Open source kanban boards with unlimited everything

  • Stars

    5,591

  • Last commit

    1 day ago

  • License

    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:

Favicon of Jira
Jira
Favicon of Cosmos Server

Cosmos Server

Self-hosted cloud platform with automated security

  • Stars

    6,147

  • Last commit

    3 days ago

  • License

    Unknown
Complete self-hosting solution with automated maintenance, Smart-Shield protection, anti-DDoS, SSO authentication, and VPN access for secure private cloud management.

Open Source Alternative to:

Favicon of Umbrel
Umbrel
Favicon of Lightdash

Lightdash

Open-source BI for modern data teams

  • Stars

    6,122

  • Last commit

    8 hours ago

  • License

    MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.

Open Source Alternative to:

Favicon of Power BI
Power BI
Favicon of Workadventure

Workadventure

Virtual office platform for engaging remote collaboration

  • Stars

    5,750

  • Last commit

    1 day ago

  • License

    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:

Favicon of Microsoft Teams
Microsoft Teams
Favicon of Papra

Papra

Organize and secure your documents in one central hub

  • Stars

    5,300

  • Last commit

    20 hours ago

  • License

    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:

Favicon of Google Drive
Google Drive
Favicon of Requestly

Requestly

Intercept, modify, and debug HTTP(S) requests effortlessly

  • Stars

    6,758

  • Last commit

    10 hours ago

  • License

    AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing

Open Source Alternative to:

Favicon of Postman
Postman
Favicon of Plunk

Plunk

The open-source, affordable email platform

  • Stars

    5,442

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of OpenStack

OpenStack

Open source cloud infrastructure trusted at massive scale

  • Stars

    6,022

  • Last commit

    8 hours ago

  • License

    Apache-2.0
OpenStack manages compute, storage, and networking across VMs, bare metal, and containers via APIs or a dashboard. Trusted by Walmart, China Mobile, and more.

Open Source Alternative to:

Favicon of Microsoft Azure
Microsoft Azure
Favicon of ONLYOFFICE Docs

ONLYOFFICE Docs

Complete office suite for documents, spreadsheets & more

  • Stars

    6,883

  • Last commit

    2 months ago

  • License

    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:

Favicon of Microsoft 365
Microsoft 365
Favicon of Zabbix

Zabbix

Enterprise monitoring for networks, apps, and infrastructure

  • Stars

    6,351

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Monitors networks, servers, cloud services, IoT, and OT environments with no per-device licensing fees, available self-hosted or as a managed SaaS platform.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of Forgejo

Forgejo

Self-hosted Git forge that's lightweight and secure

  • Stars

    5,442

  • Last commit

    11 hours ago

  • License

    Unknown
Self-hosted software forge offering GitHub-like features with minimal resources. Easy installation, low maintenance, and 100% free software for secure project management.

Open Source Alternative to:

Favicon of GitHub
GitHub
Favicon of Flagsmith

Flagsmith

Feature flags and remote config for rapid deployment

  • Stars

    6,541

  • Last commit

    8 hours ago

  • License

    BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.

Open Source Alternative to:

Favicon of LaunchDarkly
LaunchDarkly
Favicon of UnKey

UnKey

Secure, scalable API key management for developers

  • Stars

    5,433

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.

Open Source Alternative to:

Favicon of Kong
Kong
Favicon of Campfire

Campfire

Self-hosted group chat without recurring subscription fees

  • Stars

    4,604

  • Last commit

    7 days ago

  • License

    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:

Favicon of Slack
Slack
Favicon of Standard Notes

Standard Notes

Secure, encrypted notes for your digital life

  • Stars

    6,624

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.

Open Source Alternative to:

Favicon of Obsidian
Obsidian
Favicon of 5ire

5ire

AI
Smart desktop AI assistant with powerful local knowledge features

  • Stars

    5,345

  • Last commit

    2 months ago

  • License

    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:

Favicon of Claude
Claude
Favicon of Apache Pinot

Apache Pinot

Distributed OLAP database for real-time analytics at scale

  • Stars

    6,132

  • Last commit

    13 hours ago

  • License

    Apache-2.0
Sub-second SQL queries on fresh streaming data at petabyte scale, built for high-concurrency user-facing apps and AI agent backends.

Open Source Alternative to:

Favicon of Splunk
Splunk
Favicon of Permify

Permify

Build scalable authorization in minutes, not months

  • Stars

    5,950

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.

Open Source Alternative to:

Favicon of Auth0
Auth0
Favicon of Fathom Lite

Fathom Lite

Privacy-focused analytics without the complexity

  • Stars

    8,018

  • Last commit

    6 months ago

  • License

    MIT
A simple, privacy-first analytics platform that provides valuable website insights without compromising visitor data or requiring cookie consent banners.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of OpenShot

OpenShot

Free, cross-platform video editor that's easy to learn

  • Stars

    6,460

  • Last commit

    17 hours ago

  • License

    GPL-3.0
A free, open-source video editor for Linux, Mac, and Windows with animation, effects, multi-track editing, and 3D title rendering.

Open Source Alternative to:

Favicon of CapCut
CapCut
Favicon of BleachBit

BleachBit

Clean your system and free disk space

  • Stars

    6,830

  • Last commit

    12 hours ago

  • License

    GPL-3.0
BleachBit frees disk space & protects privacy by deleting cache, cookies, history & temp files from Firefox, Chrome & more. Open source for Linux/Windows.

Open Source Alternative to:

Favicon of CCleaner
CCleaner
Favicon of Weblate

Weblate

Continuous web-based localization for global reach

  • Stars

    6,059

  • Last commit

    8 hours ago

  • License

    GPL-3.0
Web-based continuous localization platform with version control integration, quality checks, and clean interface. Used by 2,500+ projects in 165+ countries.

Open Source Alternative to:

Favicon of Crowdin
Crowdin
Favicon of ezBookkeeping

ezBookkeeping

Lightweight self-hosted bookkeeping with AI receipt scanning

  • Stars

    5,542

  • Last commit

    9 hours ago

  • License

    MIT
A privacy-first personal finance app with two-level accounts, multi-currency support, AI receipt recognition, and broad data import from formats like GnuCash and Firefly III.

Open Source Alternative to:

Favicon of YNAB
YNAB
Favicon of Kener

Kener

Deploy a professional status page in minutes, no coding required

  • Stars

    5,154

  • Last commit

    2 days ago

  • License

    MIT
Free, open-source status page and uptime monitor with Docker deployment. Track 11 service types, manage incidents, schedule maintenance, and notify subscribers instantly.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of GIMP

GIMP

Professional image editing without the price tag

  • Stars

    6,400

  • Last commit

    12 hours ago

  • License

    Unknown
Free, open-source image editor with professional tools for photo manipulation, digital art creation, and graphic design. Cross-platform support.

Open Source Alternative to:

Favicon of Adobe Photoshop
Adobe Photoshop
Favicon of Inngest

Inngest

Effortless event-driven workflows for modern applications

  • Stars

    5,818

  • Last commit

    1 day ago

  • License

    SSPL-1.0
Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.

Open Source Alternative to:

Favicon of Kafka
Kafka
Favicon of Agenta

Agenta

AI
Build, automate, and improve AI agents with your team

  • Stars

    4,731

  • Last commit

    9 hours ago

  • License

    MIT
Open-source workspace for building and running AI agents: chat-driven development, scheduling, human-in-the-loop approvals, versioning, and tracing. Self-host or use the cloud.

Open Source Alternative to:

Favicon of Claude Cowork
Claude Cowork
Favicon of useSend

useSend

Pay per email sent, not for contact storage

  • Stars

    4,661

  • Last commit

    9 days ago

  • License

    AGPL-3.0
Open source email platform for transactional and marketing emails. Self-host or use cloud service with transparent pricing - pay only for emails sent.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Latitude

Latitude

AI
Full observability for AI agents in production

  • Stars

    4,632

  • Last commit

    8 hours ago

  • License

    MIT
Open-source platform for monitoring AI agents: captures traces, surfaces failure patterns, alerts on issues, and helps you verify fixes with automated evals.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Passbolt

Passbolt

Secure password management for teams

  • Stars

    6,111

  • Last commit

    18 days ago

  • License

    AGPL-3.0
Open source password manager focused on security, collaboration and privacy for organizations

Open Source Alternative to:

Favicon of LastPass
LastPass
Favicon of Vikunja

Vikunja

Organize, collaborate, and conquer your tasks

  • Stars

    5,321

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
A powerful, open-source task management platform for teams and individuals, offering customizable workflows and seamless integration.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Digger

Digger

Terraform automation with pull request workflows

  • Stars

    5,041

  • Last commit

    28 days ago

  • License

    MIT
Open-source CI/CD orchestrator for Terraform with pull request automation, drift detection, and enterprise-grade security. Self-hostable with private runners.

Open Source Alternative to:

Favicon of env0
env0
Favicon of Solidus

Solidus

Flexible eCommerce platform for brands that stand out

  • Stars

    5,324

  • Last commit

    1 day ago

  • License

    BSD-3-Clause
Open-source eCommerce platform offering customization, scalability and enterprise-grade features for brands of all sizes

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of Frappe Books

Frappe Books

Modern desktop accounting made simple and free

  • Stars

    4,937

  • Last commit

    3 days ago

  • License

    AGPL-3.0
A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.

Open Source Alternative to:

Favicon of Quickbooks
Quickbooks
Favicon of Zammad

Zammad

Powerful helpdesk solution for streamlined customer service

  • Stars

    5,896

  • Last commit

    9 hours ago

  • License

    AGPL-3.0
Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.

Open Source Alternative to:

Favicon of LiveChat
LiveChat
Favicon of ACI.dev

ACI.dev

AI
Build reliable AI agents with unified tool integration

  • Stars

    4,889

  • Last commit

    3 months ago

  • License

    Apache-2.0
Platform for connecting AI agents to 500+ tools with built-in multi-tenant auth management and granular permissions using either function calling or a unified MCP server

Open Source Alternative to:

Favicon of Pipedream
Pipedream
Favicon of Waterfox

Waterfox

Privacy-first browser built for power users

  • Stars

    6,261

  • Last commit

    20 hours ago

  • License

    Unknown
Firefox-based browser with built-in ad blocking, oblivious DNS, zero telemetry, tree-style tabs, and no AI features sending your data anywhere.

Open Source Alternative to:

Favicon of Firefox
Firefox
Favicon of Countly

Countly

Comprehensive analytics for data-driven decisions

  • Stars

    5,896

  • Last commit

    14 hours ago

  • License

    Unknown
All-in-one analytics platform for mobile, web, and desktop apps. Track user behavior, monitor performance, and optimize your product.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Mathesar

Mathesar

Spreadsheet-like interface for PostgreSQL databases

  • Stars

    5,113

  • Last commit

    16 hours ago

  • License

    GPL-3.0
A self-hosted tool that provides an intuitive, spreadsheet-style interface for viewing, editing, and querying PostgreSQL databases without technical expertise.

Open Source Alternative to:

Favicon of Airtable
Airtable
Favicon of Frappe CRM

Frappe CRM

Open-source CRM that puts simplicity and control first

  • Stars

    3,488

  • Last commit

    8 hours ago

  • License

    AGPL-3.0
A flexible and customizable CRM platform for managing contacts, deals, and customer relationships without the complexity or user-based pricing of traditional solutions.

Open Source Alternative to:

Favicon of Attio
Attio
Favicon of OSMAnd

OSMAnd

Navigate anywhere with detailed offline maps and GPS

  • Stars

    5,962

  • Last commit

    8 hours ago

  • License

    Unknown
Comprehensive offline navigation app with detailed maps, turn-by-turn guidance, and specialized routing for hiking, cycling, and walking worldwide.

Open Source Alternative to:

Favicon of Google Maps
Google Maps
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Favicon of Claude Code

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Favicon of Spotify

Spotify

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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