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Cap Captcha VS SharkEyes.dev

Compare Cap Captcha VS SharkEyes.dev and see what are their differences

Cap Captcha

Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.

No screenshot yet
Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
SharkEyes.dev

Protect your website forms from spam and fake signups without annoying captchas. Privacy-first security with zero fingerprinting. Try it now.

SharkEyes.dev screenshot
Rating
0 reviews
Pricing
Freemium $9 / Monthly (Pro Plan, 30 domains, Advanced features, Priority support)
Alternatives Is it good?
RepDB
Exercise dataset for fitness apps: transparent background, animations, no subscription sponsored

Which is more popular?

SPAM Protection popularity
100% vs 0%
alternatives listed
41 vs 6

Base details

Website, pricing, platforms and company facts side by side.

Cap Captcha
SharkEyes.dev
Website capjs.js.org sharkeyes.dev
Pricing
Open source
Freemium $9 / Monthly (Pro Plan, 30 domains, Advanced features, Priority support) Official pricing
Company — Startup from Israel · 1 - 9 employees · 2025
Listed in
SPAM Protection Captcha Security Security & Privacy +1
Web Application Security Developer Tools Anti-Spam Security Security & Privacy Web App SPAM Protection Recaptcha Alternative Captcha +6

About Cap Captcha and SharkEyes.dev

In their own words, as submitted to SaaSHub.

Cap Captcha
SharkEyes.dev

No description of Cap Captcha yet.

Tired of spam bots attacking your website forms? Fake registrations, junk inquiries, and comment spam standard CAPTCHAs dont help. They only frustrate real users while "smart" bots bypass them anyway. SharkEyes takes a different approach. The system quietly detects spam and fake registrations in...

Read more about SharkEyes.dev

Features and specs

What each product offers, as listed by its team.

Cap Captcha 0 features
SharkEyes.dev 4 features

No features have been listed yet.

  • Privacy
    Prioritizes user privacy by default. SharkEyes does not harvest, store, or sell user telemetry data to third parties.
  • Security
    Protects web forms-including login, registration, contact, and comment sections-from automated spam, brute-force attacks, and bad bots using behavioral scoring.
  • Granular Control & Dashboard
    Includes an intuitive dashboard to set security rules, manage allowed domains, and toggle protection modes instantly.
  • Developer-Friendly
    Built for simple deployment with clean REST APIs, lightweight SDKs, and transparent configuration without complex infrastructure overhead.

Analysis

An editorial look at what each product does well and who it suits.

Cap Captcha
SharkEyes.dev

Overall verdict

  • Cap (capjs.js.org) is a solid, modern CAPTCHA alternative that uses a proof-of-work challenge instead of tracking users or requiring image puzzles. It is open-source, lightweight, privacy-friendly, and self-hostable, making it a good choice for developers who want a simple bot-mitigation solution without relying on third-party services like Google reCAPTCHA.

Why this product is good

  • Open-source and free, giving full transparency and control over the code
  • Privacy-focused since it uses proof-of-work challenges rather than tracking user behavior or data
  • Lightweight and fast, with a much smaller footprint than traditional CAPTCHA solutions
  • Self-hostable, so you aren't dependent on external providers or their availability
  • No annoying image puzzles for users, resulting in a smoother user experience
  • Easy to integrate with a straightforward API and framework-agnostic design

Recommended for

  • Developers building privacy-conscious applications who want to avoid third-party tracking
  • Small to medium websites needing basic bot protection on forms and logins
  • Projects that prefer self-hosted, open-source solutions over commercial services
  • Teams wanting a lightweight, low-friction alternative to Google reCAPTCHA or hCaptcha
  • Applications where a seamless user experience without puzzle-solving is a priority

No analysis of SharkEyes.dev yet.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Cap Captcha
SharkEyes.dev
100% 100%
SPAM Protection
0% 0%
0% 0%
Web App
100% 100%
100% 100%
Captcha
0% 0%
0% 0%
Web Application Security
100% 100%

Questions & Answers

As answered by people managing Cap Captcha and SharkEyes.dev.

Why should a person choose your product over its competitors?

SharkEyes.dev's answer:

Traditional captchas ruin user experience and lower conversion rates, while big security vendors often track user data across the web. SharkEyes balances high-grade security with complete user privacy and zero user friction, making it quick to deploy, affordable for growing businesses.

What makes your product unique?

SharkEyes.dev's answer:

SharkEyes delivers privacy first spam and bot protection without annoying captchas or invasive browser fingerprinting. It blocks automated submissions seamlessly in the background, ensuring a frictionless user experience while fully

How would you describe the primary audience of your product?

SharkEyes.dev's answer:

Web developers, SaaS founders, indie hackers, and digital agencies looking for an easy-to-integrate, privacy-centric alternative to reCAPTCHA or hCaptcha for protecting lead forms, signups, and feedback channels.

What's the story behind your product?

SharkEyes.dev's answer:

SharkEyes was created out of frustration with complex, user-unfriendly captchas that hurt site conversions and compromise visitor privacy. We wanted a lightweight, modern security solution that protects forms effectively without forcing real users to solve puzzles or giving away their personal browsing data.

Which are the primary technologies used for building your product?

SharkEyes.dev's answer:

JavaScript, Golang, Python, REST API, Webhooks, Cloud Infrastructure, Bash, and Lightweight Anomaly Detection Algorithms.

User comments

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Alternatives to Cap Captcha and SharkEyes.dev

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