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Open Source Projects using Cloudflare

A curated collection of the 78 best open source software using Cloudflare. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.

Favicon of Highlight

Highlight

Real-time observability for modern web applications

  • Stars

    9,380

  • Last commit

    14 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 Expensify

Expensify

Simplify expense management for businesses of all sizes

  • Stars

    5,062

  • Last commit

    3 hours ago

  • License

    MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.
Favicon of MausBot

MausBot

AI
A team of AI agents in a chat app, on your own machine

  • Stars

    4,925

  • Last commit

    4 hours ago

  • License

    Apache-2.0
Run a team of AI agents locally on your own API keys and subscriptions, with scheduled tasks, computer use, and Gmail, GitHub and Slack integrations.

Open Source Alternative to:

Favicon of Grok Bot
Grok Bot
Favicon of Mike

Mike

AI
Open-source legal AI that law firms control and extend

  • Stars

    4,341

  • Last commit

    5 hours ago

  • License

    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:

Favicon of Harvey
Harvey
Favicon of Helicone

Helicone

AI
Build reliable AI apps with comprehensive observability

  • Stars

    6,224

  • Last commit

    6 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 Rivet

Rivet

Build stateful backends with in-memory actors

  • Stars

    6,298

  • Last commit

    23 hours ago

  • License

    Apache-2.0
Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.

Open Source Alternative to:

Favicon of Cloudflare Workers
Cloudflare Workers
Favicon of Silverbullet

Silverbullet

Programmable notes with queries, Lua scripting, and wiki links

  • Stars

    6,325

  • Last commit

    9 hours ago

  • License

    MIT
A self-hosted, browser-based note-taking system that turns plain Markdown pages into a queryable, scriptable knowledge base you control.

Open Source Alternative to:

Favicon of Notion
Notion
Favicon of UnKey

UnKey

Secure, scalable API key management for developers

  • Stars

    5,465

  • Last commit

    3 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 Agenta

Agenta

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

  • Stars

    4,836

  • Last commit

    3 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 Bknd

Bknd

Feature-rich backend that runs anywhere you need it

  • Stars

    3,773

  • Last commit

    21 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 Tianji

Tianji

Website analytics, uptime monitoring, and server status in one

  • Stars

    3,108

  • Last commit

    3 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 c15t

c15t

Build privacy-compliant cookie banners with full control

  • Stars

    1,978

  • Last commit

    17 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 Maple

Maple

OpenTelemetry observability with traces, logs, and metrics

  • Stars

    1,838

  • Last commit

    5 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 ClassroomIO

ClassroomIO

Build your custom learning academy in minutes

  • Stars

    1,719

  • Last commit

    6 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 Udemy
Udemy
Favicon of Vrite

Vrite

Collaborative content creation for technical teams

  • Stars

    2,004

  • Last commit

    4 days ago

  • License

    AGPL-3.0
A powerful platform for technical writing, offering real-time collaboration, version control, and seamless integrations.

Open Source Alternative to:

Favicon of Mintlify
Mintlify
Favicon of Amical

Amical

AI
Type 10x faster with AI-powered voice dictation

  • Stars

    1,557

  • Last commit

    3 days ago

  • License

    MIT
Open source AI dictation app that transforms speech to text with context-aware formatting. Fast, accurate transcription for meetings, notes, and hands-free typing.

Open Source Alternative to:

Favicon of Wispr Flow
Wispr Flow
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
Favicon of RAWmakase

RAWmakase

Lightroom-compatible RAW editor, no subscription

  • Stars

    1,199

  • Last commit

    6 hours ago

  • License

    MIT
Non-destructive RAW photo editor for macOS, Linux, and Windows that reads Lightroom catalogs, presets, and camera profiles. Free, MIT licensed, built in Rust.

Open Source Alternative to:

Favicon of Adobe Lightroom
Adobe Lightroom
Favicon of Chalk.ist

Chalk.ist

Transform your source code into stunning visuals

  • Stars

    1,846

  • Last commit

    9 months ago

  • License

    MIT
Create beautiful, customizable images of your source code with ease, perfect for presentations, documentation, and social media sharing.
Favicon of Pearl

Pearl

AI
AI-powered automation that lives in your Slack workspace

  • Stars

    1,098

  • Last commit

    6 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 Swetrix

Swetrix

Cookieless, privacy-first web analytics without the complexity

  • Stars

    1,206

  • Last commit

    4 days ago

  • License

    AGPL-3.0
Privacy-first web analytics with real-time dashboards, session replays, error tracking, A/B testing, and GDPR compliance out of the box. No cookies, no consent banners.

Open Source Alternative to:

Favicon of Google Analytics
Google Analytics
Favicon of Temps

Temps

One self-hosted binary replaces Vercel, Sentry, and analytics tools

  • Stars

    846

  • Last commit

    3 hours ago

  • License

    Apache-2.0
Self-hosted platform for small dev teams combining deployments, error tracking, analytics, session replay, uptime monitoring, and managed databases in one dashboard.

Open Source Alternative to:

Favicon of Vercel
Vercel
Favicon of Frontman

Frontman

AI
AI coding agent that sees your live app and edits code

  • Stars

    716

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Open-source AI coding agent that runs in your browser, sees your live DOM and app state, and makes real code edits from plain English descriptions.

Open Source Alternative to:

Favicon of Lovable
Lovable
Favicon of OpenComputer

OpenComputer

AI
Persistent cloud VMs that hibernate and wake in seconds

  • Stars

    566

  • Last commit

    5 hours ago

  • License

    Apache-2.0
Provides always-on virtual machines for AI agents with full OS access, persistent state, elastic CPU/memory resizing, and instant checkpoints.

Open Source Alternative to:

Favicon of Daytona
Daytona
Favicon of Contentport

Contentport

Your content engine for growing on Twitter at scale

  • Stars

    769

  • Last commit

    10 months ago

  • License

    AGPL-3.0
Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Open Source Alternative to:

Favicon of Post Bridge
Post Bridge
Favicon of Nordcraft

Nordcraft

Craft AAA web apps that delight your users

  • Stars

    491

  • Last commit

    3 hours ago

  • License

    Apache-2.0
Visual web development engine combining design and development tools. Build immersive, interactive web experiences with component-based framework, real-time collaboration, and powerful visual editor.

Open Source Alternative to:

Favicon of Framer
Framer
Favicon of Hive

Hive

Open-source GraphQL federation platform

  • Stars

    484

  • Last commit

    7 hours ago

  • License

    MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs

Open Source Alternative to:

Favicon of Apollo GraphQL
Apollo GraphQL
Favicon of Marble CMS

Marble CMS

Simple content management for modern sites

  • Stars

    384

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
A headless CMS designed for blogs, changelogs, and articles. Features intuitive editor, team collaboration, media management, and API integration.

Open Source Alternative to:

Favicon of WordPress
WordPress
Favicon of Notra

Notra

AI
Track your brand's visibility across AI answer engines

  • Stars

    270

  • Last commit

    4 hours ago

  • License

    AGPL-3.0
GEO tool that queries ChatGPT, Claude, Gemini, and Perplexity with your buyers' questions, then shows you who gets recommended and how to close the gap.

Open Source Alternative to:

Favicon of Otterly.AI
Otterly.AI
Favicon of Capgo

Capgo

OTA updates for Capacitor apps without app store delays

  • Stars

    211

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
Live update platform for Ionic and Capacitor apps that pushes JavaScript, CSS, and asset changes to devices in minutes, with channels, rollback, and release analytics.

Open Source Alternative to:

Favicon of Appflow
Appflow
Favicon of Prismical

Prismical

AI
Transcribe meetings and voice notes with local AI, no bots required

  • Stars

    112

  • Last commit

    12 days ago

  • License

    MIT
Free, open-source AI note-taker that transcribes meetings and voice notes locally using Whisper and Parakeet. Works on Mac, Windows, and mobile without invasive bots.

Open Source Alternative to:

Favicon of Granola
Granola
Favicon of Formizee

Formizee

Create and manage forms with ease

  • Stars

    185

  • Last commit

    1 year ago

  • License

    Apache-2.0
Formizee is an open-source platform for designing, building, and analyzing forms, offering an affordable all-in-one solution

Open Source Alternative to:

Favicon of Google Forms
Google Forms
Favicon of Werbot

Werbot

Secure, scalable server access management for DevOps

  • Stars

    169

  • Last commit

    2 months ago

  • License

    BUSL-1.1
Centralized platform for managing SSH access, enhancing security, and streamlining server administration for DevOps teams.

Open Source Alternative to:

Favicon of HashiCorp Boundary
HashiCorp Boundary
Favicon of Abby

Abby

Type-safe feature flags and remote config for developers

  • Stars

    166

  • Last commit

    1 year ago

  • License

    AGPL-3.0
Abby offers open-source, fully typed feature flagging and remote configuration for React and Next.js, with multi-environment testing and debugging tools.

Open Source Alternative to:

Favicon of LaunchDarkly
LaunchDarkly
Favicon of Wraps

Wraps

Code-first email platform that deploys to your AWS

  • Stars

    64

  • Last commit

    4 days ago

  • License

    AGPL-3.0
Build email templates as React components and automations in TypeScript. Deploy to your AWS account with SES integration. Marketing teams edit content without code.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Cloudmark

Cloudmark

Organize and access your bookmarks seamlessly in the cloud

  • Stars

    78

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Cloud-based bookmark manager that lets you save, categorize, and access your web favorites from any device with smart organization features

Open Source Alternative to:

Favicon of Pocket
Pocket
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