Open Source Projects using Express
A curated collection of the 149 best open source software using Express. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Serverless backend platform for modern app development
Stars
9,279Last commit
12 hours agoLicense
MIT
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.
Open Source Alternative to:
Real-time observability for modern web applications
Stars
9,371Last commit
6 days agoLicense
Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.
Open Source Alternative to:
Flexible e-commerce for modern businesses
Stars
8,376Last commit
7 hours agoLicense
MIT
A headless, API-first e-commerce framework built on Node.js with TypeScript, offering customization and scalability for online stores.
Open Source Alternative to:
Visual development platform for modern web experiences
Stars
8,807Last commit
3 days agoLicense
MIT
Drag-and-drop interface for creating and optimizing digital experiences, with headless CMS and powerful integrations.
Open Source Alternative to:
Open-source A/B testing and feature flagging platform
Stars
8,159Last commit
5 hours agoLicense
MIT
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Open Source Alternative to:
Secure, customizable e-signatures for modern businesses
Stars
6,917Last commit
5 days agoLicense
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:
Modular auth, payments, emails, and analytics for your product
Stars
6,841Last commit
6 hours agoLicense
Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Open Source Alternative to:
Comprehensive monitoring and incident management platform
Stars
7,519Last commit
6 hours agoLicense
Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
Open Source Alternative to:
Visual app builder that integrates with your existing codebase
Stars
6,973Last commit
9 hours agoLicense
MIT
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,379Last commit
8 hours agoLicense
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Open Source Alternative to:
Open-source cloud communications platform for developers
Stars
8,080Last commit
20 hours agoLicense
MIT
Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.
Open Source Alternative to:
Secure email, calendar and contacts with end-to-end encryption
Stars
7,873Last commit
5 hours agoLicense
GPL-3.0
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.
Open Source Alternative to:
Secure collaboration with end-to-end encryption
Stars
7,861Last commit
9 hours agoLicense
AGPL-3.0
Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.
Open Source Alternative to:
Build reliable AI apps with comprehensive observability
Stars
6,102Last commit
23 hours agoLicense
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:
Transform SQL into beautiful data stories
Stars
6,880Last commit
6 hours agoLicense
MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Open Source Alternative to:
Open-source legal AI that law firms control and extend
Stars
4,157Last commit
5 hours agoLicense
AGPL-3.0
Self-hostable alternative to Harvey and Legora with document analysis, contract drafting, tabular review, and reusable workflows. Zero licensing costs, full data control.
Open Source Alternative to:
Automated translations that scale with your code and commits
Stars
5,406Last commit
6 days agoLicense
Apache-2.0
Transform your app into a global product with AI-powered localization that integrates directly into your development workflow. Supports 83+ languages with Git-native automation.
Open Source Alternative to:
Self-hosted cloud platform with automated security
Stars
6,129Last commit
5 hours agoLicense
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:
Open-source BI for modern data teams
Stars
6,084Last commit
5 hours agoLicense
MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.
Open Source Alternative to:
Virtual office platform for engaging remote collaboration
Stars
5,733Last commit
6 hours agoLicense
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:
The open-source, affordable email platform
Stars
5,396Last commit
2 days agoLicense
AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.
Open Source Alternative to:
Feature flags and remote config for rapid deployment
Stars
6,531Last commit
7 hours agoLicense
BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Open Source Alternative to:
Deploy a professional status page in minutes, no coding required
Stars
5,129Last commit
6 days agoLicense
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:
Comprehensive analytics for data-driven decisions
Stars
5,892Last commit
5 hours agoLicense
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:
Organize, collaborate, and conquer your tasks
Stars
5,173Last commit
8 hours agoLicense
AGPL-3.0
A powerful, open-source task management platform for teams and individuals, offering customizable workflows and seamless integration.
Open Source Alternative to:
Enterprise workplace AI with data you own and control
Stars
3,691Last commit
5 hours agoLicense
Apache-2.0
Self-hostable enterprise AI platform that unifies business data across apps, powers a knowledge graph for cited answers, and lets teams build AI agents across their stack.
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
4,000Last commit
1 day agoLicense
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:
Open-source data integration for modern stacks
Stars
5,043Last commit
6 hours agoLicense
MIT
Collect, transform, and sync data across your entire infrastructure with a flexible, code-based approach to data integration.
Open Source Alternative to:
Comprehensive open-source business management platform
Stars
4,348Last commit
12 hours agoLicense
AGPL-3.0
All-in-one solution for ERP, CRM, HRM, ATS, and project management to streamline your business operations
Open Source Alternative to:
Open-source growth platform for customer-centric teams
Stars
4,075Last commit
5 hours agoLicense
AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.
Open Source Alternative to:
Open source observability platform for modern applications
Stars
4,270Last commit
13 days agoLicense
AGPL-3.0
Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.
Open Source Alternative to:
Create stunning data visualizations with ease
Stars
4,046Last commit
18 hours agoLicense
MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.
Open Source Alternative to:
Next-gen WebSockets server for real-time apps
Stars
5,633Last commit
1 year agoLicense
AGPL-3.0
Open-source, Pusher-compatible WebSockets server that's simple, fast, and resilient for building real-time applications.
Open Source Alternative to:
Open source ecommerce platform for modern businesses
Stars
3,408Last commit
5 hours agoLicense
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:
Open source agency management tool for streamlined success
Stars
3,150Last commit
3 days agoLicense
AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.
Open Source Alternative to:
Stripe payments, usage tracking, and paywalls in 3 functions
Stars
2,649Last commit
5 hours agoLicense
Apache-2.0
Simplify Stripe integration for AI startups with 3 functions, 0 webhooks. Build pricing plans in 30 minutes with usage tracking, credits, and feature controls.
Open Source Alternative to:
Self-hosted home automation without the cloud
Stars
3,156Last commit
6 hours agoLicense
Apache-2.0
Privacy-first home automation platform that runs locally on your hardware, supports Zigbee, Matter, and MQTT, and lets you automate your home without coding.
Open Source Alternative to:
AI agents that transform merchant risk decisions at scale
Stars
2,426Last commit
5 days agoLicense
Unknown
Reduce fraud, accelerate underwriting, and maintain compliance with AI-driven merchant risk intelligence for PSPs, banks, and fintechs.
Open Source Alternative to:
Design, prototype, and test user experiences with ease
Stars
2,690Last commit
1 day agoLicense
GPL-3.0
Quant-UX is an open-source tool for creating interactive prototypes, conducting user tests, and analyzing results to improve UX design.
Open Source Alternative to:
Serverless team chat over Tor, no phone number needed
Stars
2,641Last commit
1 day agoLicense
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:
Business rules engine with AI, visual flows, and audit trails
Stars
1,945Last commit
1 day agoLicense
MIT
Model business logic in decision tables, visual flows, and natural-language rules. Change rules without deploys, test every path, and run the same engine anywhere.
Open Source Alternative to:
Open-source message stream built on Postgres
Stars
2,191Last commit
6 months agoLicense
MIT
Sequin offers a feature-rich messaging system with a simple HTTP API, providing RabbitMQ-like functionality without adding complexity to your stack.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
Sevalla
Sent