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Open Source Projects tagged "Open Source"

A curated collection of the best open source projects tagged "Open Source". Each listing includes a website screenshot along with a detailed review of its features.

Favicon of Lago

Lago

Transform complex usage data into accurate, real-time billing

  • Stars

    10,369

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Open Source Alternative to:

Favicon of Stripe Billing
Stripe Billing
Favicon of Alokai

Alokai

Build and deploy scalable storefronts with ease

  • Stars

    10,942

  • Last commit

    2 months ago

  • License

    MIT
A comprehensive Frontend as a Service solution that helps developers create, deploy and manage enterprise ecommerce storefronts with ready integrations and cloud infrastructure.

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of WebStudio

WebStudio

Visual web development with code-level control

  • Stars

    8,846

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Powerful no-code platform for building responsive websites. Combines visual editing with full HTML/CSS customization.

Open Source Alternative to:

Favicon of Framer
Framer
Favicon of OpenStatus

OpenStatus

Status page and uptime monitoring for growing teams

  • Stars

    8,994

  • Last commit

    6 hours ago

  • License

    AGPL-3.0
Open-source status page and uptime monitor that tracks endpoints from 28 global regions, communicates incidents, and helps satisfy SOC 2 audit requirements.

Open Source Alternative to:

Favicon of incident.io
incident.io
Favicon of Highlight

Highlight

Real-time observability for modern web applications

  • Stars

    9,367

  • Last commit

    1 day ago

  • License

    Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of OpenLLMetry

OpenLLMetry

AI
Monitor LLM performance with open-source observability

  • Stars

    7,385

  • Last commit

    10 days ago

  • License

    Apache-2.0
Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of OpenSign

OpenSign

Secure, customizable e-signatures for modern businesses

  • Stars

    6,878

  • Last commit

    14 hours ago

  • License

    AGPL-3.0
A powerful, open-source e-signature solution offering customization, integration, and enhanced security for businesses of all sizes.

Open Source Alternative to:

Favicon of DocuSign
DocuSign
Favicon of OpenWispr

OpenWispr

AI
Voice-to-text that works offline, privately, on any app

  • Stars

    5,562

  • Last commit

    6 hours ago

  • License

    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:

Favicon of Wispr Flow
Wispr Flow
Favicon of Webiny

Webiny

Open-source serverless CMS for modern web projects

  • Stars

    8,031

  • Last commit

    8 hours ago

  • License

    MIT
A powerful, scalable platform for building custom websites and apps with serverless architecture, offering flexibility and cost-efficiency.

Open Source Alternative to:

Favicon of WordPress
WordPress
Favicon of Helicone

Helicone

AI
Build reliable AI apps with comprehensive observability

  • Stars

    6,084

  • Last commit

    3 days ago

  • License

    Apache-2.0
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of Requestly

Requestly

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

  • Stars

    6,750

  • Last commit

    13 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 Kan

Kan

Open source kanban boards with unlimited everything

  • Stars

    5,359

  • Last commit

    7 days 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 UnKey

UnKey

Secure, scalable API key management for developers

  • Stars

    5,420

  • Last commit

    7 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 ACI.dev

ACI.dev

AI
Build reliable AI agents with unified tool integration

  • Stars

    4,880

  • 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 Latitude

Latitude

AI
Full observability for AI agents in production

  • Stars

    4,595

  • Last commit

    7 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 Agenta

Agenta

AI
Build reliable LLM apps with integrated workflows

  • Stars

    4,495

  • Last commit

    7 hours ago

  • License

    MIT
Open-source LLMOps platform providing prompt management, evaluation, and observability tools for building robust AI applications with team collaboration.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Frappe Books

Frappe Books

Modern desktop accounting made simple and free

  • Stars

    4,891

  • Last commit

    3 months 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 YNAB
YNAB
Favicon of Frappe CRM

Frappe CRM

Open-source CRM that puts simplicity and control first

  • Stars

    3,354

  • Last commit

    7 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 Hi.Events

Hi.Events

Effortlessly manage events and sell tickets online

  • Stars

    3,986

  • Last commit

    7 days ago

  • License

    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:

Favicon of Eventbrite
Eventbrite
Favicon of OpnForm

OpnForm

Create powerful forms with ease and flexibility

  • Stars

    3,611

  • Last commit

    14 hours ago

  • License

    AGPL-3.0
A versatile open-source form builder for collecting data, managing submissions, and integrating with your favorite tools.

Open Source Alternative to:

Favicon of Google Forms
Google Forms
Favicon of Laminar

Laminar

AI
AI-powered platform for engineering LLM products

  • Stars

    3,182

  • Last commit

    24 hours ago

  • License

    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:

Favicon of LangChain
LangChain
Favicon of LinkStack

LinkStack

Your digital identity, beautifully organized

  • Stars

    3,799

  • Last commit

    29 days ago

  • License

    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:

Favicon of LinkTree
LinkTree
Favicon of Collabora Online

Collabora Online

Open-source document editing suite for secure collaboration

  • Stars

    3,319

  • Last commit

    1 day ago

  • License

    Unknown
Powerful online document editor with Microsoft Office compatibility. Integrate into your infrastructure or use trusted hosting partners for secure team collaboration.

Open Source Alternative to:

Favicon of Microsoft Word
Microsoft Word
Favicon of EspoCRM

EspoCRM

Complete customer relationship management made simple

  • Stars

    3,259

  • Last commit

    13 hours ago

  • License

    AGPL-3.0
Open-source CRM software for managing customers, companies, projects and opportunities. Intuitive interface with cloud and self-hosted options available.

Open Source Alternative to:

Favicon of Attio
Attio
Favicon of Piwigo

Piwigo

Organize thousands of photos with ease

  • Stars

    3,842

  • Last commit

    2 days ago

  • License

    GPL-2.0
Open source photo management software for organizing, sharing and managing large photo libraries. Perfect for teams, organizations and individuals.

Open Source Alternative to:

Favicon of Google Photos
Google Photos
Favicon of FleetBase

FleetBase

Open source modular logistics platform for faster app development

  • Stars

    2,511

  • Last commit

    19 hours ago

  • License

    AGPL-3.0
Fleetbase is a comprehensive open source logistics suite offering API, TMS, driver and customer apps for streamlined operations and development.

Open Source Alternative to:

Favicon of Shipsy
Shipsy
Favicon of OpenLIT

OpenLIT

AI
Monitor, debug, and scale LLM applications with ease

  • Stars

    2,701

  • Last commit

    3 days ago

  • License

    Apache-2.0
Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Storj

Storj

Secure, decentralized cloud storage for your data

  • Stars

    3,276

  • Last commit

    16 hours ago

  • License

    AGPL-3.0
Storj offers a distributed cloud storage platform with enhanced security, global performance, and significant cost savings compared to traditional providers.

Open Source Alternative to:

Favicon of Amazon S3
Amazon S3
Favicon of Dittofeed

Dittofeed

Open-source customer engagement platform for automation

  • Stars

    2,906

  • Last commit

    5 months ago

  • License

    MIT
Dittofeed offers low-code tools for message automation across multiple channels, including powerful segmentation and personalization features.

Open Source Alternative to:

Favicon of Mailchimp
Mailchimp
Favicon of Comp AI

Comp AI

Get audit-ready for SOC 2, ISO 27001, HIPAA, and GDPR

  • Stars

    1,872

  • Last commit

    10 days ago

  • License

    AGPL-3.0
AI-driven compliance platform that automates evidence collection, policy generation, and continuous monitoring across 580+ integrations for SOC 2, ISO 27001, HIPAA, and GDPR.

Open Source Alternative to:

Favicon of Vanta
Vanta
Favicon of Open Mercato

Open Mercato

AI-native CRM/ERP foundation with 80% already built

  • Stars

    1,648

  • Last commit

    9 hours ago

  • License

    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:

Favicon of SAP
SAP
Favicon of Firecamp

Firecamp

Unified API development ecosystem for modern teams

  • Stars

    2,607

  • Last commit

    6 months ago

  • License

    AGPL-3.0
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.

Open Source Alternative to:

Favicon of Postman
Postman
Favicon of Horilla

Horilla

Comprehensive open-source HR management solution

  • Stars

    1,331

  • Last commit

    12 hours ago

  • License

    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:

Favicon of Workable
Workable
Favicon of Sync-in

Sync-in

Open-source file storage with complete data sovereignty

  • Stars

    1,640

  • Last commit

    13 days ago

  • License

    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:

Favicon of Google Drive
Google Drive
Favicon of Tailcall

Tailcall

AI
The modern GraphQL runtime

  • Stars

    1,442

  • Last commit

    19 hours ago

  • License

    Apache-2.0
Swiftly design and ship best-practice GraphQL backends atop existing data sources and APIs.

Open Source Alternative to:

Favicon of Apollo GraphQL
Apollo GraphQL
Favicon of Trench

Trench

Fast, scalable analytics infrastructure

  • Stars

    1,661

  • Last commit

    5 months ago

  • License

    MIT
Open source analytics platform built on ClickHouse and Kafka, offering high-speed event tracking and real-time querying capabilities.

Open Source Alternative to:

Favicon of Amplitude
Amplitude
Favicon of Zola

Zola

AI
AI chat companion with versatile model support

  • Stars

    1,533

  • Last commit

    8 months ago

  • License

    Apache-2.0
Open-source chat application that lets you interact with multiple AI models in one interface, offering flexible conversations and diverse capabilities.

Open Source Alternative to:

Favicon of Claude
Claude
Favicon of Litlyx

Litlyx

Cookie-less analytics for privacy-focused insights

  • Stars

    1,741

  • Last commit

    9 months ago

  • License

    Apache-2.0
Track user behavior, custom events, and conversion funnels in real-time with a single line of code, all while maintaining GDPR compliance.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Beaver Notes

Beaver Notes

Local-first notes app with no cloud, no AI, no tracking

  • Stars

    1,331

  • Last commit

    7 hours ago

  • License

    MIT
A privacy-focused, offline-first note-taking app that stores everything on your device, with Markdown, note linking, file attachments, LaTeX math, and bring-your-own sync.

Open Source Alternative to:

Favicon of Notion
Notion
Favicon of Pearl

Pearl

AI
AI-powered automation that lives in your Slack workspace

  • Stars

    1,095

  • Last commit

    4 months ago

  • License

    Apache-2.0
Connect all your apps through Pearl, an AI assistant that automates workflows directly in Slack. No coding required - save 10+ hours weekly with intelligent task automation.

Open Source Alternative to:

Favicon of Viktor
Viktor
Favicon of TimeScribe

TimeScribe

Transform your time tracking into actionable insights

  • Stars

    885

  • Last commit

    3 months ago

  • License

    GPL-3.0
Advanced time tracking and productivity analytics tool that captures detailed work patterns, generates comprehensive reports, and helps optimize workflow efficiency.

Open Source Alternative to:

Favicon of Clockify
Clockify
Favicon of Phase

Phase

Secure, deploy, and manage application secrets effortlessly

  • Stars

    904

  • Last commit

    16 hours ago

  • License

    MIT
Open source platform for engineering teams to manage secrets and environment variables from development to production, with powerful integrations.

Open Source Alternative to:

Favicon of Keeper
Keeper
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