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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 Quickwit

Quickwit

Lightning-fast search for massive datasets

  • Stars

    11,725

  • Last commit

    3 days ago

  • License

    Apache-2.0
High-performance search engine designed for big data, offering scalability, real-time indexing, and cost-effective operations.

Open Source Alternative to:

Favicon of Algolia
Algolia
Favicon of Mautic

Mautic

Open source marketing automation for everyone

  • Stars

    10,796

  • Last commit

    7 hours ago

  • License

    Unknown
Mautic is a free and open source marketing automation platform that helps businesses manage leads, create campaigns, and analyze results.

Open Source Alternative to:

Favicon of HubSpot
HubSpot
Favicon of Automatisch

Automatisch

Open-source integration platform for seamless workflows

  • Stars

    13,999

  • Last commit

    8 months ago

  • License

    Unknown
Self-hosted automation tool that connects your apps and services, enabling powerful integrations and efficient data flow across your ecosystem.

Open Source Alternative to:

Favicon of n8n
n8n
Favicon of Lago

Lago

Transform complex usage data into accurate, real-time billing

  • Stars

    10,689

  • Last commit

    2 days 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 Papermark

Papermark

Open-source document sharing with powerful analytics

  • Stars

    9,249

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Secure, customizable platform for sharing documents and tracking engagement. Perfect for sales teams, marketers, and businesses.

Open Source Alternative to:

Favicon of PandaDoc
PandaDoc
Favicon of WebStudio

WebStudio

Visual web development with code-level control

  • Stars

    9,089

  • Last commit

    2 days 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 Webflow
Webflow
Favicon of OpenStatus

OpenStatus

Status page and uptime monitoring for growing teams

  • Stars

    9,196

  • Last commit

    8 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 Alokai

Alokai

Build and deploy scalable storefronts with ease

  • Stars

    10,957

  • Last commit

    4 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 Highlight

Highlight

Real-time observability for modern web applications

  • Stars

    9,381

  • Last commit

    18 days 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

    7,501

  • Last commit

    6 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 Dograh

Dograh

AI
Self-hostable voice agent platform with full model control

  • Stars

    5,904

  • Last commit

    8 hours ago

  • License

    BSD-2-Clause
Open-source voice agent platform that lets you plug in your own STT, LLM, and TTS models, deploy on-prem or in your VPC, and build agents via MCP or a visual workflow builder.

Open Source Alternative to:

Favicon of Voiceflow
Voiceflow
Favicon of OpenSign

OpenSign

Secure, customizable e-signatures for modern businesses

  • Stars

    7,115

  • Last commit

    3 days 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 Webiny

Webiny

Open-source serverless CMS for modern web projects

  • Stars

    8,047

  • Last commit

    7 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

    6,228

  • Last commit

    8 hours 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 Kan

Kan

Open source kanban boards with unlimited everything

  • Stars

    5,779

  • Last commit

    17 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 Requestly

Requestly

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

  • Stars

    6,753

  • Last commit

    9 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 UnKey

UnKey

Secure, scalable API key management for developers

  • Stars

    5,468

  • 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 BleachBit

BleachBit

Clean your system and free disk space

  • Stars

    7,156

  • 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 Agenta

Agenta

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

  • Stars

    4,843

  • Last commit

    20 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 Latitude

Latitude

AI
Full observability for AI agents in production

  • Stars

    4,723

  • 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 Frappe CRM

Frappe CRM

Open-source CRM that puts simplicity and control first

  • Stars

    3,818

  • 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 Salesforce
Salesforce
Favicon of FleetBase

FleetBase

Open source modular logistics platform for faster app development

  • Stars

    4,362

  • Last commit

    7 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 Hi.Events

Hi.Events

Effortlessly manage events and sell tickets online

  • Stars

    4,071

  • Last commit

    22 hours 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 ACI.dev

ACI.dev

AI
Build reliable AI agents with unified tool integration

  • Stars

    4,916

  • Last commit

    5 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 OpnForm

OpnForm

Create powerful forms with ease and flexibility

  • Stars

    3,855

  • Last commit

    2 days 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 LinkStack

LinkStack

Your digital identity, beautifully organized

  • Stars

    3,908

  • Last commit

    15 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 Laminar

Laminar

AI
AI-powered platform for engineering LLM products

  • Stars

    3,404

  • Last commit

    18 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 Pinecone
Pinecone
Favicon of EspoCRM

EspoCRM

Complete customer relationship management made simple

  • Stars

    3,499

  • Last commit

    3 days 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 Salesforce
Salesforce
Favicon of Collabora Online

Collabora Online

Open-source document editing suite for secure collaboration

  • Stars

    3,381

  • Last commit

    10 days 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 OpenLIT

OpenLIT

AI
Monitor, debug, and scale LLM applications with ease

  • Stars

    2,858

  • Last commit

    4 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 Piwigo

Piwigo

Organize thousands of photos with ease

  • Stars

    3,866

  • Last commit

    4 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 Dittofeed

Dittofeed

Open-source customer engagement platform for automation

  • Stars

    3,011

  • Last commit

    7 days 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 Storj

Storj

Secure, decentralized cloud storage for your data

  • Stars

    3,283

  • Last commit

    7 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 Frappe Books

Frappe Books

Modern desktop accounting made simple and free

  • Stars

    4,999

  • Last commit

    17 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 Comp AI

Comp AI

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

  • Stars

    2,044

  • 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 Scrut
Scrut
Favicon of c15t

c15t

Build privacy-compliant cookie banners with full control

  • Stars

    1,988

  • Last commit

    7 hours ago

  • License

    Apache-2.0
Open source consent management framework for modern web apps. Framework-agnostic, fully customizable, and performance-first with no vendor lock-in.

Open Source Alternative to:

Favicon of Cookie Control
Cookie Control
Favicon of Open Mercato

Open Mercato

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

  • Stars

    1,870

  • Last commit

    7 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 Horilla

Horilla

Comprehensive open-source HR management solution

  • Stars

    1,461

  • Last commit

    11 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 Breezy HR
Breezy HR
Favicon of Sync-in

Sync-in

Open-source file storage with complete data sovereignty

  • Stars

    1,941

  • Last commit

    15 hours 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 Firecamp

Firecamp

Unified API development ecosystem for modern teams

  • Stars

    2,616

  • Last commit

    8 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 Kodus

Kodus

AI
AI code review that learns your team's standards

  • Stars

    1,500

  • Last commit

    14 hours ago

  • License

    AGPL-3.0
Open source AI code reviewer that analyzes pull requests for quality, security, and performance while respecting your existing rules and model preferences.

Open Source Alternative to:

Favicon of CodeRabbit
CodeRabbit
Favicon of Tailcall

Tailcall

AI
The modern GraphQL runtime

  • Stars

    1,443

  • Last commit

    2 months 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
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