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docs: better Feature comparison

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Tiago
2025-05-30 19:11:32 +01:00
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README.md
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@@ -71,6 +71,20 @@ It's ideal for:
- Blocking automated login attempts
- Securing free-tier abuse
## Feature comparison
| CAPTCHA | Open-source | Free | Private | Fast to solve | Easy for humans | Small error rate | Checkpoint support | GDPR/CCPA Compliant | Customizable | Hard for bots | Easy to integrate |
| :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- |
| **Cap** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | 🟨 | ✅ |
| Cloudflare Turnstile | ❌ | ✅ | 🟨 | 🟨 | ✅ | ❌ | 🟨 | ✅ | ❌ | 🟨 | ✅ |
| reCAPTCHA | ❌ | 🟨 | ❌ | ✅ | ❌ | 🟨 | ❌ | 🟨 | ❌ | ❌ | ✅ |
| hCAPTCHA | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | 🟨 | ❌ | 🟨 | ✅ |
| Altcha | ✅ | ✅ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| FriendlyCaptcha | ❌ | ❌ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| MTCaptcha | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | ✅ | ❌ | ❌ | 🟨 |
| GeeTest | ❌ | ❌ | ❌ | 🟨 | 🟨 | 🟨 | ❌ | ✅ | ❌ | 🟨 | 🟨 |
| Arkose Labs | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ | 🟨 | ❌ | ❌ |
## Alternatives
Cap is a modern alternative to:
docs/.vitepress/config.mjs
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@@ -149,7 +149,7 @@ export default withMermaid({
sidebar: [
{ text: "Quickstart", link: "/guide/index.md" },
{ text: "Alternatives", link: "/guide/alternatives.md" },
{ text: "Feature comparison", link: "/guide/alternatives.md" },
{ text: "Philosophy", link: "/guide/philosophy.md" },
{
text: "Modes",
docs/guide/alternatives.md
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# Alternatives to Cap
## Summary
| CAPTCHA | Open-source | Free | Private | Fast to solve | Easy for humans | Small error rate | Checkpoint support | GDPR/CCPA Compliant | Customizable | Hard for bots | Easy to integrate |
| :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- |
| **Cap** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | 🟨 | ✅ |
| Cloudflare Turnstile | ❌ | ✅ | 🟨 | 🟨 | ✅ | ❌ | 🟨 | ✅ | ❌ | 🟨 | ✅ |
| reCAPTCHA | ❌ | 🟨 | ❌ | ✅ | ❌ | 🟨 | ❌ | 🟨 | ❌ | ❌ | ✅ |
| hCAPTCHA | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | 🟨 | ❌ | 🟨 | ✅ |
| Altcha | ✅ | ✅ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| FriendlyCaptcha | ❌ | ❌ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| MTCaptcha | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | ✅ | ❌ | ❌ | 🟨 |
| GeeTest | ❌ | ❌ | ❌ | 🟨 | 🟨 | 🟨 | ❌ | ✅ | ❌ | 🟨 | 🟨 |
| Arkose Labs | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ | 🟨 | ❌ | ❌ |
| CAPTCHA | Open-source | Cost | Private | Hard for bots | Easy for humans | Small error rate | Customizable | Easy to integrate | "Middleware" support |
| :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- |
| **Cap** | ✅ | Free | ✅ | 🟨 (PoW) | ✅ | ✅ | ✅ | 🟨 | ✅ |
| Cloudflare Turnstile | ❌ | Free | 🟨 | ✅ | ✅ | ❌ | ❌ | ✅ | 🟨 |
| reCAPTCHA | ❌ | Freemium | ❌ | ❌ | ❌ | 🟨 | ❌ | ✅ | ❌ |
| hCAPTCHA | ❌ | Freemium | 🟨 | ✅ | ❌ | 🟨 | ❌ | ✅ | ❌ |
| Altcha | ✅ | Free | ✅ | 🟨 (PoW) | ✅ | ✅ | ✅ | 🟨 | 🟨 |
| FriendlyCaptcha | ❌ | Paid | ✅ | 🟨 (PoW) | ✅ | ✅ | ✅ | 🟨 | ❌ |
| MTCaptcha | ❌ | Freemium | 🟨 | ❌ | ❌ | 🟨 | ❌ | 🟨 | ❌ |
| GeeTest **(china-based ⚠️)** | ❌ | Paid | ❌ | 🟨 (depends) | 🟨 (depends) | 🟨 | ❌ | 🟨 | ❌ |
| Arkose Labs | ❌ | Paid | ❌ | ❌ (audio captcha is weak) | ❌ (worst) | ❌ | 🟨 | ❌ | ❌ |
#### Notes:
- "Hard for bots" does not include solvers like 2captcha or BrightData, as I cannot verify their legitimacy myself.
- Arkose Labs is considered "Easy for Bots" as their audio CAPTCHA is easy to solve by multi-modal LLMs.
## All alternatives
@@ -28,7 +31,7 @@ Not only is Cap significantly smaller and faster than reCAPTCHA, it's open-sourc
Pretty much the same as reCAPTCHA, although hCAPTCHA is significantly more secure. Personally it's the best alternative to Cap, even though the widget's bundle size alone is significantly bigger.
Fun fact about hCAPTCHA, an attacker can easily solve it for $1.05/1k results while *you* (the site owner) need to pay hCAPTCHA $1/1k solves just for the captcha, even if the content behind the captcha doesn't cost you anything.
Fun fact about hCAPTCHA, an attacker can easily solve it for $1.05/1k results while _you_ (the site owner) need to pay hCAPTCHA $1/1k solves just for the captcha, even if the content behind the captcha doesn't cost you anything.
Imagine if anyone could drain $100 dollars from your bank account just by knowing your name and paying $105 - pretty scary, right?
docs/index.md
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@@ -103,6 +103,20 @@ It's ideal for:
- Blocking automated login attempts
- Securing free-tier abuse
## Feature comparison
| CAPTCHA | Open-source | Free | Private | Fast to solve | Easy for humans | Small error rate | Checkpoint support | GDPR/CCPA Compliant | Customizable | Hard for bots | Easy to integrate |
| :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- | :-- |
| **Cap** | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | 🟨 | ✅ |
| Cloudflare Turnstile | ❌ | ✅ | 🟨 | 🟨 | ✅ | ❌ | 🟨 | ✅ | ❌ | 🟨 | ✅ |
| reCAPTCHA | ❌ | 🟨 | ❌ | ✅ | ❌ | 🟨 | ❌ | 🟨 | ❌ | ❌ | ✅ |
| hCAPTCHA | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | 🟨 | ❌ | 🟨 | ✅ |
| Altcha | ✅ | ✅ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| FriendlyCaptcha | ❌ | ❌ | ✅ | 🟨 | ✅ | ✅ | ❌ | ✅ | ✅ | 🟨 | 🟨 |
| MTCaptcha | ❌ | 🟨 | 🟨 | ❌ | ❌ | 🟨 | ❌ | ✅ | ❌ | ❌ | 🟨 |
| GeeTest | ❌ | ❌ | ❌ | 🟨 | 🟨 | 🟨 | ❌ | ✅ | ❌ | 🟨 | 🟨 |
| Arkose Labs | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ | 🟨 | ❌ | ❌ |
## Alternatives
Cap is a modern alternative to: