Submit
Ad
 
Learn More

Open Source Projects using Testing Library

A curated collection of the 200 best open source software using Testing Library. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.

Favicon of Permify

Permify

Build scalable authorization in minutes, not months

  • Stars

    5,962

  • Last commit

    23 hours 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 Inngest

Inngest

Effortless event-driven workflows for modern applications

  • Stars

    5,931

  • Last commit

    11 hours 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 Latitude

Latitude

AI
Full observability for AI agents in production

  • Stars

    4,718

  • Last commit

    1 day 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 LangWatch

LangWatch

AI
Simulation-based testing and evaluation for AI agents

  • Stars

    4,934

  • Last commit

    2 hours ago

  • License

    Apache-2.0
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Mathesar

Mathesar

Spreadsheet-like interface for PostgreSQL databases

  • Stars

    5,146

  • Last commit

    21 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 ACI.dev

ACI.dev

AI
Build reliable AI agents with unified tool integration

  • Stars

    4,907

  • 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 Jitsu

Jitsu

Open-source data integration for modern stacks

  • Stars

    5,105

  • Last commit

    1 day ago

  • License

    MIT
Collect, transform, and sync data across your entire infrastructure with a flexible, code-based approach to data integration.

Open Source Alternative to:

Favicon of Supermetrics
Supermetrics
Favicon of Rowy

Rowy

Build powerful backends without leaving your browser

  • Stars

    6,844

  • Last commit

    2 years ago

  • License

    Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.

Open Source Alternative to:

Favicon of Airtable
Airtable
Favicon of Bknd

Bknd

Feature-rich backend that runs anywhere you need it

  • Stars

    3,769

  • Last commit

    16 days ago

  • License

    Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.

Open Source Alternative to:

Favicon of Supabase
Supabase
Favicon of Tracecat

Tracecat

AI
Open source security automation platform for builders

  • Stars

    3,829

  • Last commit

    22 hours ago

  • License

    AGPL-3.0
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.

Open Source Alternative to:

Favicon of Splunk
Splunk
Favicon of Dagu

Dagu

YAML-defined workflow orchestration, no database required

  • Stars

    4,314

  • Last commit

    2 hours ago

  • License

    GPL-3.0
Single-binary workflow orchestrator that runs scheduled DAGs locally or over SSH, with retries, human tasks, a built-in Web UI, and file-based state storage.

Open Source Alternative to:

Favicon of AWS Step Functions
AWS Step Functions
Favicon of Bigcapital

Bigcapital

Automate financial processes for smarter business decisions

  • Stars

    3,931

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.

Open Source Alternative to:

Favicon of Quickbooks
Quickbooks
Favicon of Spliit

Spliit

Effortlessly split expenses with friends and roommates

  • Stars

    2,979

  • Last commit

    1 hour ago

  • License

    MIT
A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.

Open Source Alternative to:

Favicon of Splitwise
Splitwise
Favicon of Open Wearables

Open Wearables

Convert wearable data into actionable health insights with open algorithms

  • Stars

    2,629

  • Last commit

    1 day ago

  • License

    MIT
Self-hosted health intelligence platform with open algorithms, AI reasoning engine, and zero per-user fees. Connect Apple Health, Whoop, Garmin, Oura, and more.

Open Source Alternative to:

Favicon of Terra API
Terra API
Favicon of Worklenz

Worklenz

Open source agency management tool for streamlined success

  • Stars

    3,200

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.

Open Source Alternative to:

Favicon of Linear
Linear
Favicon of Shopware

Shopware

Open source ecommerce platform for modern businesses

  • Stars

    3,446

  • Last commit

    7 hours ago

  • License

    MIT
A flexible and customizable ecommerce solution that enables businesses to build responsive online stores with advanced features and automation capabilities.

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of Anthias

Anthias

Transform any TV into professional digital signage

  • Stars

    3,689

  • Last commit

    1 day ago

  • License

    Unknown
Free open-source digital signage software that turns Raspberry Pi or old PCs into powerful display solutions. Manage images, videos, and web content easily.

Open Source Alternative to:

Favicon of Screenly
Screenly
Favicon of OpenLIT

OpenLIT

AI
Monitor, debug, and scale LLM applications with ease

  • Stars

    2,837

  • Last commit

    1 day 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 Shelf

Shelf

Track gear, bookings, and inventory without spreadsheets

  • Stars

    3,029

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Open source asset management platform for teams to track equipment, manage bookings, prevent double-bookings, and handle custody and audits across locations.

Open Source Alternative to:

Favicon of Asset Panda
Asset Panda
Favicon of Tianji

Tianji

Website analytics, uptime monitoring, and server status in one

  • Stars

    3,106

  • Last commit

    2 days ago

  • License

    Apache-2.0
Self-hostable platform combining website analytics, uptime monitoring, server status, Docker tracking, status pages, and telemetry for indie developers and small teams.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Comp AI

Comp AI

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

  • Stars

    2,026

  • Last commit

    1 day 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 Drata
Drata
Favicon of Usertour

Usertour

Create engaging product tours and user onboarding experiences

  • Stars

    2,318

  • Last commit

    9 hours ago

  • License

    AGPL-3.0
Open-source platform for building interactive product tours, tooltips, and in-app guides to improve user engagement and feature adoption without complex coding

Open Source Alternative to:

Favicon of Userflow
Userflow
Favicon of Notifuse

Notifuse

Self-hosted email platform with visual editor & analytics

  • Stars

    2,243

  • Last commit

    10 days ago

  • License

    AGPL-3.0
Free open-source email platform for newsletters and transactional emails. Self-hosted alternative to Mailchimp with visual MJML editor, A/B testing, and analytics.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Grida

Grida

Open canvas for designing and building web apps

  • Stars

    2,664

  • Last commit

    1 day ago

  • License

    Apache-2.0
Design and build web applications on an open canvas with AI-powered tools, Figma integration, pixel drawing, and a modular SDK built for extensibility.

Open Source Alternative to:

Favicon of Figma
Figma
Favicon of Ballerine

Ballerine

AI agents that transform merchant risk decisions at scale

  • Stars

    2,440

  • Last commit

    2 days ago

  • License

    Unknown
Reduce fraud, accelerate underwriting, and maintain compliance with AI-driven merchant risk intelligence for PSPs, banks, and fintechs.

Open Source Alternative to:

Favicon of Seon
Seon
Favicon of Checkmk

Checkmk

AI
Complete IT infrastructure monitoring made simple

  • Stars

    2,389

  • Last commit

    2 hours ago

  • License

    GPL-2.0
Monitor your entire IT infrastructure with 2,000+ plugins, automated discovery, and scalable architecture. Open source and enterprise solutions available.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of Quiet

Quiet

Serverless team chat over Tor, no phone number needed

  • Stars

    2,659

  • Last commit

    12 days ago

  • License

    GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Open Mercato

Open Mercato

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

  • Stars

    1,838

  • Last commit

    3 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 Maple

Maple

OpenTelemetry observability with traces, logs, and metrics

  • Stars

    1,817

  • Last commit

    6 hours ago

  • License

    Unknown
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.

Open Source Alternative to:

Favicon of DataDog
DataDog
Favicon of Atomic CRM

Atomic CRM

Open-source CRM toolkit for personalized solutions

  • Stars

    1,357

  • Last commit

    2 hours ago

  • License

    MIT
Build a customizable CRM that matches your company's vision, designed for developers and loved by end users.

Open Source Alternative to:

Favicon of Salesforce
Salesforce
Favicon of dstack

dstack

AI
GPU orchestration across clouds, Kubernetes, and on-prem

  • Stars

    2,276

  • Last commit

    1 day ago

  • License

    MPL-2.0
Unified control plane for AI compute that provisions and schedules GPU workloads across any cloud, Kubernetes cluster, or bare-metal server.

Open Source Alternative to:

Favicon of Kubernetes
Kubernetes
Favicon of ClassroomIO

ClassroomIO

Build your custom learning academy in minutes

  • Stars

    1,717

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Open source LMS designed for companies and training organizations. Create, manage, and deliver courses with AI support, customizable dashboards, and collaborative features.

Open Source Alternative to:

Favicon of Skool
Skool
Favicon of Firecamp

Firecamp

Unified API development ecosystem for modern teams

  • Stars

    2,617

  • Last commit

    7 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 Voiden

Voiden

Build APIs like code with Git-native workspace

  • Stars

    1,772

  • Last commit

    1 day ago

  • License

    Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.

Open Source Alternative to:

Favicon of Postman
Postman
Favicon of Mezon

Mezon

Create custom spaces to chat, game, and connect globally

  • Stars

    1,996

  • Last commit

    4 hours ago

  • License

    MIT
Build your own community space for gaming, chatting, and hanging out with friends worldwide. Customize your environment for the perfect social experience.

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Azimutt

Azimutt

Next-Gen ERD: Design, Explore, Document and Analyze your database.

  • Stars

    2,190

  • Last commit

    2 months ago

  • License

    MIT
Azimutt is a powerful tool for seamlessly exploring, documenting, and optimizing large and complex databases.

Open Source Alternative to:

Favicon of DrawSQL
DrawSQL
Favicon of Jean

Jean

AI
Parallel AI agent workspaces with Git and project context

  • Stars

    1,321

  • Last commit

    7 hours ago

  • License

    Apache-2.0
Run multiple AI coding agents in isolated Git worktrees, with cross-repo context, GitHub/Linear integrations, and support for Claude, Codex, Cursor, and more.

Open Source Alternative to:

Favicon of Claude Code
Claude Code
Favicon of Flowglad

Flowglad

AI
Cross-system automation and knowledge base for accounting firms

  • Stars

    1,722

  • Last commit

    5 months ago

  • License

    Unknown
Connects client data across tools, automates recurring accounting workflows, and maintains a self-updating knowledge base with human approval controls.
Favicon of WunderGraph

WunderGraph

Unify APIs, databases, and services effortlessly

  • Stars

    1,273

  • Last commit

    23 hours ago

  • License

    Apache-2.0
A powerful backend framework that simplifies API integration, enhances security, and boosts developer productivity for modern web applications.

Open Source Alternative to:

Favicon of Apollo GraphQL
Apollo GraphQL
Favicon of CourseLit

CourseLit

Create, sell, and manage online courses with ease

  • Stars

    1,273

  • Last commit

    2 days ago

  • License

    AGPL-3.0
An open-source platform for building and selling online courses, featuring customizable themes, integrated payments, and user management.

Open Source Alternative to:

Favicon of Skool
Skool
Favicon of Pearl

Pearl

AI
AI-powered automation that lives in your Slack workspace

  • Stars

    1,097

  • Last commit

    5 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 LyteNyte Grid

LyteNyte Grid

Lightning-fast React data grid for enterprise scale

  • Stars

    1,026

  • Last commit

    2 months ago

  • License

    Unknown
High-performance React data table with server-side loading, tree data, pivoting, and advanced features. Handles billions of rows with minimal bundle size.
Ad
Favicon

 

  
 
Ad
Favicon

 

  
 
Ad
Favicon