Open Source B2B Software Under MIT License

VS

Visual Studio Code

4.7/5.01 verified review

Free·Open Source·MIT

Free and extensible source code editor with native support for AI-assisted workflows and remote development.

• Massive ecosystem of extensions for multiple languages and frameworks.
• Built-in support for remote development via SSH, containers, and WSL.
• Completely free distribution model with an open-source core.

194.4kstars on GitHub

DE

Deno

4.7/5.01 verified review

Free·Open Source·MIT

Secure JavaScript and TypeScript runtime with built-in tooling and Node.js compatibility.

• Native TypeScript support without external build configurations.
• Comprehensive built-in tooling including test runners and linters.
• Strong compatibility with npm packages and existing Node ecosystems.

108.8kstars on GitHub

PA

Pauseless

4.7/5.01 verified review

Free·Open Source·MIT

Remove silences and pauses from your videos in seconds directly in your browser.

• 100% local browser processing ensuring absolute data privacy without server uploads.
• Native export compatibility with major NLEs like Final Cut Pro and DaVinci Resolve.
• Free and open source software with no watermarks or artificial export limits.

1stars on GitHub

GE

GenesisDB

4.7/5.01 verified review

Free·Open Source·MIT

Open source event sourcing database written in Go

• Distributed as a single static Go binary with zero runtime dependencies
• Native CloudEvents 1.0 support with hierarchical subject routing
• Completely open source under the MIT license with no event limits or license keys

14stars on GitHub

OP

OpenStarterKit

4.7/5.01 verified review

Free·Open Source·MIT

Open-source Next.js SaaS starter kit featuring Better Auth, Stripe, and Prisma.

• Completely free and open source with no licensing fees for initial development
• Built on plain Next.js without proprietary compilers or custom framework layers
• Includes pre-configured integrations for authentication, database ORM, and billing

22stars on GitHub

GE

Godot Engine

4.7/5.01 verified review

Free·Open Source·MIT

Free and open-source 2D and 3D game engine for cross-platform development.

• 100 percent royalty-free licensing model under the MIT license.
• Modular node-based architecture that facilitates component reuse.
• Native support for cross-platform development across desktop, mobile, and XR environments.

119.3kstars on GitHub

SO

Socket.IO

4.7/5.01 verified review

Free·Open Source·MIT

Bidirectional real-time communication library for Node.js and browsers.

• Native automatic reconnection handling network drops.
• Compatibility with multiple transports including HTTP long-polling.
• Mature ecosystem and adapters for scaling across multiple servers.

63.2kstars on GitHub

DO

Docusaurus

4.7/5.01 verified review

Free·Open Source·MIT

Optimized static site generator built with React for technical documentation.

• Native MDX support allowing direct embedding of React components within documentation
• Built-in documentation versioning system to sync manuals with software releases
• Out-of-the-box internationalization and localization with multiple translation managers

66.6kstars on GitHub

TE

Temporal

4.7/5.01 verified review

Freemium·Open Source·MIT

Open source durable execution platform for building resilient applications

• Eliminates the need to write complex manual retry logic and distributed state management
• Excellent support for self-hosting via its open source core
• Complete event history per workflow execution for advanced debugging

24.0kstars on GitHub

GI

GitHub

4.7/5.01 verified review

Freemium·Open Source·MIT

AI-powered developer platform for Git version control, CI/CD, and technical collaboration.

• Massive ecosystem with millions of public repositories and third-party integrations.
• Integrated CI/CD automation workflows through GitHub Actions.
• Contextual and advanced coding assistance via GitHub Copilot.

SA

Sanity

4.6/5.01 verified review

Freemium·Open Source·MIT

Structured content operating system for web, mobile, and AI agent applications.

• Flexible data modeling based on code-defined schemas.
• Highly customizable and extensible editing environment using React components.
• Reliable interface designed to decouple content from the presentation layer.

197stars on GitHub

SE

Sentry

4.6/5.01 verified review

Freemium·Open Source·MIT

Application performance monitoring and error tracking platform for development teams.

• Quick integration via SDKs with minimal setup across multiple languages.
• Detailed error context capture including stack traces and local variables.
• Wide ecosystem of integrations with version control and messaging tools.

2.2kstars on GitHub

SA

SafeGrd

4.6/5.01 verified review

Paid·$15/mo·MIT

Encrypted immutable backups with automated restore testing.

• Local age encryption and S3 Object Lock compliance mode.
• Automated periodic restore testing with signed certificates.
• Client-side execution ensuring backup data never passes through third-party servers.

FR

Friday

4.6/5.01 verified review

Free·Open Source·MIT

Open-source MIT-licensed harness to coordinate multiple coding agents as a unified team.

• Open-source MIT license with no hidden costs.
• Local execution preserves code privacy.
• Native coordination across multiple agents and platforms.

22stars on GitHub

GE

Gemini Exporter

4.6/5.01 verified review

Free·Open Source·MIT

Local backup and bulk export for Google Gemini chat history.

• 100% local browser operation without external server storage
• Support for multiple export formats including PDF, Markdown, and JSON
• Auditable open-source code requiring no API keys or paid subscriptions

7stars on GitHub

TR

Trellis

4.6/5.01 verified review

Free·Open Source·MIT

Native macOS terminal in Swift with sidebar window management, nested splits, and automation API.

• Native Swift architecture optimized for Apple Silicon and Intel with zero telemetry.
• Open-source MIT license with full repository visibility on GitHub.
• Advanced workspace organization via sidebar windows and nested panes.

14stars on GitHub

TR

Tyler RSS

4.6/5.01 verified review

Free·Open Source·MIT

Free, open-source, lightweight desktop RSS reader with offline article reading.

• Completely free and open-source software under the MIT license.
• Local data storage and article library powered by SQLite.
• Zero application telemetry and no user account requirement.

1stars on GitHub

ST

Storybook

4.6/5.01 verified review

Free·Open Source·MIT

Frontend workshop for building, testing, and documenting UI components in isolation.

• Efficient UI development in isolation.
• Rich ecosystem of addons for visual and interaction testing.
• Automated documentation generation from code.

91.4kstars on GitHub

D8

d8a.tech

4.5/5.01 verified review

Freemium·Open Source·MIT

Warehouse-native web analytics pipeline connecting tracking data directly to BigQuery or ClickHouse.

• Works with existing GA4 and Matomo tags without mandatory re-tagging.
• Self-hosted option available under an open-source MIT license.
• Direct pipeline into modern data warehouses like BigQuery and ClickHouse.

61stars on GitHub

TU

Turso

4.5/5.01 verified review

Freemium·Open Source·MIT

Rust-based SQLite compatible SQL database with MVCC concurrency and cloud synchronization.

• Full compatibility with SQLite and standard SQL syntax without modifications.
• Native support for concurrent writes via MVCC avoiding database locked errors.
• Architectural model ideal for isolating data per user, tenant, or AI agent.

25.1kstars on GitHub

WI

with icons

4.5/5.01 verified review

Free·Open Source·MIT

Free library of over 35,000 SVG, PNG and animated icons across 34 distinct visual styles.

• Completely free MIT license with no sign-up barriers
• Extensive collection spanning 34 distinct visual styles per icon
• Native packages for popular frontend frameworks like React and Vue

6stars on GitHub

MD

Md2Docx

4.5/5.01 verified review

Free·Open Source·MIT

Universal Markdown to Word engine for Node.js and modern browsers

• Modular and extensible architecture based on official plugins.
• Client-side execution in browsers without compromising data privacy.
• Native support for mathematical formulas and diagrams.

40stars on GitHub

VE

Vectoys

4.5/5.01 verified review

Free·Open Source·MIT

Open source SVG 3D engine for device mockups and interactive toys on landing pages.

• Pure SVG rendering without WebGL or canvas dependencies.
• Live interactive HTML rendered directly on device screens.
• Open source codebase distributed under the MIT license.

HY

Hyperresearch

4.5/5.01 verified review

Paid·$9/mo·MIT

Deep AI research reports with verified evidence and automated citation checking

• Automated citation verification against source passages
• Searchable vault retaining all underlying documents and raw texts
• Native support for remote MCP servers and OpenAPI specifications

4.3kstars on GitHub

CA

Castov

4.5/5.01 verified review

Free·Open Source·MIT

Fast, 100% client-side developer platform with CLI and MCP server support.

• 100% local browser and CLI execution with zero telemetry.
• Includes a native Model Context Protocol (MCP) server for Cursor and Claude.
• Over 60 interactive developer tools and chainable data pipelines.

1stars on GitHub

BS

B2B SaaS Starter

4.5/5.01 verified review

Free·Open Source·MIT

Cloudflare-first B2B SaaS infrastructure starter template for rapid application development.

• Architecture optimized for Cloudflare Workers and D1
• Includes structured logging and request tracing
• Open-source MIT model suitable for self-hosting

53stars on GitHub

栖Q

栖梧 Qiwu

4.5/5.01 verified review

Free·Open Source·MIT

Open-source Node full-stack admin template built with NestJS and Vue 3

• Unified TypeScript stack across backend, frontend, and mobile apps.
• MIT license allowing unrestricted self-hosted deployments.
• Integrated scaffolding and code generation tools for rapid feature creation.

93stars on GitHub

RO

Roboflow

4.5/5.01 verified review

Freemium·Open Source·MIT

Computer vision platform to annotate images, train models, and deploy to production.

• Advanced annotation tools integrated with modern segmentation models.
• Comprehensive dataset export support across standard machine learning formats.
• Versatile deployment options spanning cloud infrastructure and edge devices.

51.4kstars on GitHub

UM

Umami

4.5/5.01 verified review

Freemium·Open Source·MIT

Open-source web and product analytics platform focused on privacy.

• Open-source self-hostable architecture with no license restrictions.
• Cookie-free data collection model that simplifies GDPR compliance.
• Unified interface for real-time web and product analytics.

39.8kstars on GitHub

RN

React Native

4.5/5.01 verified review

Free·Open Source·MIT

Framework for building native apps for Android, iOS, and more using React.

• High code reuse between Android and iOS.
• Extensive ecosystem of third-party packages and libraries.
• Renders using real native platform components.

126.8kstars on GitHub

EX

Expo

4.5/5.01 verified review

Freemium·Open Source·MIT

Development and deployment platform for building native apps with React and React Native.

• Unified ecosystem for building and deploying iOS and Android apps.
• Built-in Over-The-Air (OTA) updates for rapid bug fixes.
• Advanced CLI and simulation tooling optimized for modern developer workflows.

53.2kstars on GitHub

KI

Kinde

4.5/5.01 verified review

Freemium·Open Source·MIT

Integrated authentication, user management, and billing platform for SaaS.

• Native integration between authentication and billing.
• Extensive ecosystem of SDKs for common frameworks.
• Built-in customer portal and user management dashboard.

19stars on GitHub

KE

KeystoneJS

4.5/5.01 verified review

Free·Open Source·MIT

Programmable headless content management system based on Node.js and GraphQL.

• Automatically generated GraphQL API from data schemas.
• Highly flexible headless architecture fully customizable via code.
• Intuitive admin interface generated without manual setup.

10.0kstars on GitHub

DE

Descope

4.5/5.01 verified review

Freemium·Open Source·MIT

Visual CIAM platform for users, B2B business customers, and AI agents.

• Visual workflow orchestration via drag-and-drop builders and extensible SDKs.
• Native support for complex identities including users, B2B tenants, and AI agents.
• Rapid implementation of passwordless authentication and SAML/OIDC connectors.

72stars on GitHub

PA

Payload

4.5/5.01 verified review

Freemium·Open Source·MIT

Open-source headless CMS and application framework built with TypeScript and React.

• Code-first architecture using TypeScript for data schema definition.
• Highly extensible with native support for hooks, custom validation, and dynamic fields.
• Flexible deployment within your own infrastructure, reducing third-party dependency.

45.7kstars on GitHub

GH

Ghost

4.5/5.01 verified review

Freemium·Open Source·MIT

Professional open-source publishing platform with built-in newsletters and monetization.

• Open-source and self-hostable with no licensing restrictions for self-management.
• Integrated business model with native payment gateways and newsletters.
• Minimalist content editor optimized for speed and readability.

55.7kstars on GitHub

VE

Vercel

4.5/5.01 verified review

Freemium·Open Source·MIT

Cloud platform for deploying web applications and AI workloads.

• Native Git integration for automated continuous deployment.
• Global edge network and serverless function execution.
• Advanced support for modern frontend frameworks and AI workloads.

143.3kstars on GitHub

CA

Cal.com

4.5/5.01 verified review

Freemium·Open Source·MIT

Open scheduling infrastructure and scheduling API for individuals and teams.

• Highly customizable scheduling infrastructure
• Extensive app marketplace and integrations
• Comprehensive developer API and React components

49.4kstars on GitHub

PE

PersonaliAI

4.5/5.01 verified review

Freemium·Open Source·MIT

Open-source conversational AI agent engine for support and conversion.

• Open-source Python and FastAPI architecture with native pgvector support
• Multi-channel deployment across websites, WhatsApp, and Slack
• Real-time WebRTC audio voice calling powered by LiveKit

16stars on GitHub

ST

Stytch

4.5/5.01 verified review

Freemium·Open Source·MIT

API-first authentication and security platform for modern applications.

• Comprehensive APIs and SDKs for passwordless auth and passkeys
• Embeddable admin portal for enterprise customer self-service
• Native support for SAML SSO and SCIM provisioning

40stars on GitHub

TR

TRACE

4.5/5.01 verified review

Freemium·Open Source·MIT

Weekly open evaluation of web scraping APIs for artificial intelligence agents.

• Fresh weekly sample testing over thousands of real web pages.
• Automated and blind evaluation methodology across providers.
• Granular and public metrics covering latency and success rates.

2stars on GitHub

HO

Hob

4.5/5.01 verified review

Free·Open Source·MIT

Open source local AI client with automated model setup and offline execution.

• 100 percent local execution without external servers or subscriptions
• Automated downloading and setup of open-weight models
• Fully offline operation with support for local file processing

416stars on GitHub

DO

Dokku

4.5/5.01 verified review

Free·Open Source·MIT

An open source, lightweight PaaS alternative for deploying and managing applications.

• Open source software with no vendor lock-in or licensing fees.
• Simple and straightforward deployments via traditional git push commands.
• Very low resource footprint compared to heavy orchestration platforms.

32.2kstars on GitHub

RE

Resend

4.5/5.01 verified review

Freemium·Open Source·MIT

Modern email API for developers and scalable web applications

• Superior developer experience with SDKs for multiple programming languages.
• Modern RESTful API with support for batch email sending.
• Proactive blocklist monitoring and deliverability tracking.

83stars on GitHub

PA

PartyKit

4.5/5.01 verified review

Free·Open Source·MIT

Deployment platform for real-time multiplayer apps, AI agents, and local-first architectures.

• Native support for WebSockets and open web standards.
• Direct compatibility with popular CRDT and state libraries like Y.js.
• Rapid local development and edge deployment workflows.

5.7kstars on GitHub

AU

Auth0

4.5/5.01 verified review

Freemium·Open Source·MIT

Adaptable authentication and authorization platform for modern applications and AI agents.

• Wide variety of SDKs and connectors for multiple programming languages.
• Rapid implementation of complex authentication flows like MFA and SSO.
• Centralized administration dashboard for user management and access rules.

343stars on GitHub

PS

Psi

4.4/5.01 verified review

Free·Open Source·MIT

A portable, extensible, and open-source coding agent written in C and Lua.

• Extremely lightweight portable binary of 6.4 MB.
• Extensible architecture powered by a C core and Lua runtime.
• Fully open source under the MIT license for complete auditability.

6stars on GitHub

NO

NotchIsland

4.4/5.01 verified review

Free·Open Source·MIT

Turns the MacBook notch into an interactive Dynamic Island for macOS.

• Fully open source software licensed under the MIT terms
• Operates completely locally with no telemetry or user tracking
• Native integration with media sources through the macOS Control Center

1stars on GitHub

VE

Vectorize

4.4/5.01 verified review

Free·Open Source·MIT

Open source agent memory with adaptive learning and persistent context storage.

• Open source MIT license allowing unrestricted commercial use and self-hosting.
• Model-agnostic memory layer compatible with any language model provider.
• Fast parallel memory retrieval with response times under 100 milliseconds.

58.7kstars on GitHub

MA

MachineMail

4.4/5.01 verified review

Freemium·Open Source·MIT

Email API designed for AI agents and automated workflows.

• Free and dedicated mailboxes for autonomous agents.
• Built-in trust reports on incoming messages for security.
• Full compatibility with the MCP protocol and AgentMail API.

SE

Seed

4.4/5.01 verified review

Free·Open Source·MIT

Open-source MIT-licensed SaaS starter built on web standards and Deno.

• MIT license with no commercial restrictions or paywalls
• Runs natively on Deno with streamlined Docker Compose deployment
• Includes 2FA authentication, role management, and Stripe billing out of the box

34stars on GitHub

RS

React SaaS Template

4.4/5.01 verified review

Free·Open Source·MIT

Production-ready React Router SaaS template with authentication and billing.

• Production-ready structure that reduces initial development time.
• Complete configuration for unit, integration, and E2E testing.
• Native integration with TypeScript, ESLint, Prettier, and GitHub Actions.

50stars on GitHub

SP

Speechmatics

4.4/5.01 verified review

Freemium·Open Source·MIT

Voice AI APIs for enterprise-grade speech-to-text and transcription in 55+ languages.

• High accuracy with diverse accents.
• Flexible deployment options.
• Comprehensive enterprise compliance.

164stars on GitHub

RE

ReadMe

4.4/5.01 verified review

Paid·Open Source·MIT

Interactive technical documentation platform for APIs and developer tools.

• Automatic generation of API references from OpenAPI specs.
• Documentation components optimized for AI agent readability.
• Built-in version control and branch management features.

147stars on GitHub

TE

Terse

4.4/5.01 verified review

Paid·Open Source·MIT

Durable agent infrastructure with serverless actors, TypeScript APIs, and Rust runtimes.

• Open-source alternative to Cloudflare Durable Objects without vendor lock-in.
• Every actor features its own embedded persistent SQLite database.
• Strongly typed TypeScript APIs combined with a high-performance Rust runtime.

342stars on GitHub

OD

OpenAI Developers

4.4/5.01 verified review

Contact Sales·Open Source·MIT

Official documentation portal and resource hub for OpenAI API integration.

• Detailed and regularly updated technical documentation on models and deprecations.
• Standardized endpoints for integrating language models and multimodal AI.
• Formal email notifications and documentation logs for version sunsets and changes.

77.0kstars on GitHub

SE

Sendoff

4.4/5.01 verified review

Free·Open Source·MIT

Send newsletters and announcements to your list from Claude or Codex using AWS SES.

• Fully self-hosted architecture on Cloudflare and AWS.
• Direct integration with AI agents like Claude or Codex.
• Uses React Email for layout design.

10stars on GitHub

ME

Meteosource

4.4/5.01 verified review

Freemium·Open Source·MIT

Hosted MCP server for AI agents delivering real-time weather forecasts and historical meteorological data.

• Native Model Context Protocol support with streamable HTTP transport
• Access to hyper-local forecasts and 20 years of historical weather data
• Simple configuration requiring only the server address and an API key

RC

Redu Cloud

4.4/5.01 verified review

Paid·Open Source·MIT

Agent-native cloud infrastructure designed for autonomous coding agents.

• Automated infrastructure provisioning via MCP integration.
• Flexible hourly billing model based on consumed resources.
• Guaranteed data hosting within the European Union.

SI

Sitesolide

4.4/5.01 verified review

Free·Open Source·MIT

Deploy small apps and static sites to your own Debian server with simple CLI commands.

• Direct deployment to self-hosted infrastructure using a single command.
• Built-in access control restricting application visibility by user email or domain.
• Open source under the MIT license with no proprietary software fees.

9stars on GitHub