Cap — Modern, Open-source PoW CAPTCHA for JavaScript

Cap.js is a fast, privacy-first proof-of-work CAPTCHA alternative to reCAPTCHA and hCaptcha. Zero dependencies, developer-friendly, and effective against spam, DDoS, and automation.

Created Aug 29, 2025

Updated Nov 14, 2025

Quick Actions

Visit Website

Recommended Apps

Smart Algorithm

Cap — Beautiful screen recordings, owned by you.

Cap is the open source alternative to Loom. Lightweight, powerful, and cross-platform. Record and share in seconds.

Screen Studio — Professional screen recorder for macOS

Screen recorder for macOS. Create engaging product demos, courses, tutorial and social media videos. Add automatic zoom on mouse actions, smooth mouse movement, and other powerful effects and animations. Designed for macOS.

Zed — The editor for what's next

Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

Motion — JavaScript & React animation library

Motion (prev Framer Motion) is a fast, production-grade web animation library for React, JavaScript and Vue. Build smooth UI animations with examples, tutorials, and a tiny footprint.

Polar — Payment infrastructure for the 21st century | Polar

Payment infrastructure for the 21st century

Twenty - The #1 Open-Source CRM

Twenty is a modern, open-source CRM alternative to Salesforce—fully customizable, affordable, and powered by the community.

OpenPanel

OpenPanel is a simple, affordable open-source alternative to Mixpanel for web and product analytics. Get powerful insights without the complexity.

Beautiful themes for shadcn/ui — tweakcn | Theme Editor & Generator

Customize theme for shadcn/ui with tweakcn's interactive editor. Supports Tailwind CSS v4, Shadcn UI, and custom styles. Modify properties, preview changes, and get the code in real time.

Supermemory — Universal Memory API for AI apps

Add long‑term memory to your LLM apps. Fast Memory API + Router. Store, recall, personalize in milliseconds.

Novu - Open-source notifications infrastructure for devs and product teams

Novu is an open-source notification platform that empowers developers to create robust, multi-channel notifications for web and mobile apps. With powerful workflows, seamless integrations, and a flexible API-first approach, Novu enables product teams to manage notifications without breaking production.

D3 by Observable | The JavaScript library for bespoke data visualization

The JavaScript library for bespoke data visualization

The Content Operating System | Sanity

Sanity is a fully customizable all-code backend for AI, automations, and applications to author and render content.