Cap
Self-hosted CAPTCHA for the modern web.
capjs.js.org Source★ 748Apache-2.0Security & Privacy / Fraud Prevention & Verification
- Monthly visits
- <5K
- Oct 2026
- Public revenue
- Undisclosed
- No public revenue evidence yet
- Entry price
- Free
- No monthly subscription pricing
- Launched
- 19mo ago
- 2025-04-21 · Est.
Traffic
Marketing moves
Launches, search & content, referrals, promotionsLaunched on Product HuntLaunch
A lightweight, modern open-source captcha
Apr 21, 2025 · 19mo agoLaunch page
Open Source & Self-Hosting
- GitHub Stars
- ★ 748
- Forks
- 87
- License
- Apache-2.0
- Primary language
- JavaScript
Traffic sources
Traffic breakdown
Channels
- Direct43%
- Organic Search30%
- Referrals10%
- Social6%
- Other10%
Countries
- France18%
- India16%
- Ecuador13%
- Australia11%
- Hong Kong11%
Search
Domain authority —Domain registered 1996-06-26
| Keyword | Monthly volume |
|---|---|
| captcha | 122.6K |
| cap github | 1,490 |
| capjs | 420 |
| capqa | 240 |
Traffic data: Vaneform
Pricing
Website does not list public plan prices.
Trial: None · Observed 2026-11-05 · Source page
Pages & changes
Key pages
Weekly snapshots- Homecapjs.js.org/
- Featurescapjs.js.org/zh/ Snapshot 2026-11-05
Changes
No pricing, plan, or positioning changes detected since tracking started.
Design
Gradient Glow (Dark canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.
First-screen preview · click to zoom
First-screen pitch & conversion flow
“Self-hosted CAPTCHA for the modern web.”
Split Copy & Visual hero structure paired with start free / sign up CTA and live generated output showcase.
Conversion path: Split Copy & Visual + Product UI Screenshot / Component → Start Free / Sign Up · Trust bar: Live Generated Output Showcase
- Category Positioning Anchor
- Large Hero Product Shot
- Metrics Strip
Palette · click to copy
- Typography
- 8.0
- Color & Contrast
- 8.0
- Layout & Spacing
- 8.0
- Craft & Polish
- 8.0
- Distinctiveness
- 7.0
Structure
- Fonts
- Inter
- Hero layout
- Split Copy & Visual
- Primary visual
- Product UI Screenshot / Component
- Conversion CTA
- Start Free / Sign Up
- Social proof
- Live Generated Output Showcase
- Navigation
- Full-Width Top Bar
- Theme & density
- Dark · Balanced
- Corners & depth
- Medium Radius · With shadow
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Gradient Glow (with Dark Developer)
Luminous radial glows and translucent glass panels, widely used across modern AI products.
## Design Tokens
```css
:root {
--background: #101019;
--surface: #171821;
--foreground: #e7e7ec;
--muted-foreground: #9697a8;
--accent: #168ff5;
--radius: 8px;
--font-heading: "Inter", ui-sans-serif, system-ui, sans-serif;
--font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}
```
Color area ratio: Background #101019 (~72%) · Surface #171821 (~11%) · Text #E7E7EC (~6%) · Muted Text #9697A8 (~7%) · Accent #168FF5 (~4%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.
## Layout & Conversion Structure
- Hero layout: Split Copy & Visual
- Navigation: Full-Width Top Bar
- Theme & density: Dark · Balanced
- Border radius & elevation: Medium Radius; use elevation shadows to separate layers
- Primary visual medium: Product UI Screenshot / Component
- Conversion CTA: Start Free / Sign Up · Trust bar uses Live Generated Output Showcase
- Headline hook: Category Positioning Anchor
- Hero components: Large Hero Product Shot, Metrics Strip
- Spatial layout notes: Split Copy & Visual hero structure paired with start free / sign up CTA and live generated output showcase.
- Visual summary: Gradient Glow (Dark canvas, balanced density) featuring split copy & visual layout and product ui screenshot / component visuals.
## Avoid
- Muddy low-contrast text over gradients
- Overuse of full-screen rainbow backgrounds
- Cluttered dense tables in the hero
Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.
Questions & evidence
- How much website traffic does Cap get?
- Vaneform estimates <5K website visits in 2026-10. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
- What is Cap and what platforms does it support?
- Cap is catalogued under Fraud Prevention & Verification: Self-hosted CAPTCHA for the modern web.. Supported platforms: Web.
- Is Cap open source?
- Cap has a public repository (https://github.com/tiagozip/cap) under the Apache-2.0 license, recording 748 GitHub stars, and supporting self-hosted deployment.Source
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