# AttestOS

**Bot mitigation and human verification** · Jacaranda Labs, Harare, Zimbabwe

> AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check and one server-side verification.

AttestOS is a CAPTCHA replacement: the visitor's browser solves a small proof-of-work challenge silently, the form carries a token, and the server verifies it once with a call shaped like reCAPTCHA's siteverify.

- Live: https://attestos.whop.site

## Who it is for

Product, growth and platform teams, publishers and documentation sites. Markets: Global.

## What it does

### Invisible challenge

A small proof-of-work check runs in the visitor's browser while the page loads.

### Token on the form

The form carries a token the visitor never sees.

### One verification

The server verifies the token once, with a request shaped like reCAPTCHA's siteverify.

### Crawler policy

AI crawlers can be made to pay for access or stay out, deliberately.

### Drops in

It replaces puzzles on sign-up, login and contact forms without a redesign.

### Tiers

From a free tier to IntegrityRuntime, AgentPass, Hardware Gateway and Enterprise.

## What you get

- No traffic-light puzzles for real visitors
- Form abandonment no longer caused by verification
- One verification call on the server
- Explicit rules for AI crawlers instead of a blanket block

## Pricing

| Product | Price | Period | Checkout |
|---|---|---|---|
| AttestOS | free | one-off | https://whop.com/checkout/plan_SwfArT3JFz5i7 |
| AttestOS Enterprise | USD 299 | month | https://whop.com/checkout/plan_Z3ZykM37fIu6E |
| AttestOS AgentPass Pro | USD 99 | month | https://whop.com/checkout/plan_RKiOkAV8VJuc8 |
| AttestOS Hardware Gateway Pro | USD 149 | month | https://whop.com/checkout/plan_K1al5PKpXXcuN |
| AttestOS IntegrityRuntime Pro | USD 49 | month | https://whop.com/checkout/plan_PkURo5bTOqjNk |
| AttestOS Free | free | one-off | https://whop.com/checkout/plan_Dethau2rAIceK |

## Questions

**What is AttestOS?**

AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check: the browser solves it silently, the form carries a token, and the server verifies that token once.

**Is AttestOS a CAPTCHA replacement?**

Yes. It does the same job as reCAPTCHA or hCaptcha without asking a real visitor to identify traffic lights, and the server-side verification call is shaped like reCAPTCHA's siteverify.

**How much does AttestOS cost?**

There is a free tier. IntegrityRuntime Pro is $49 a month, AgentPass Pro is $99 a month, Hardware Gateway Pro is $149 a month and Enterprise is $299 a month.

**Does it stop bots as well as a puzzle does?**

Bots that solve puzzles with paid services get through those puzzles anyway; a proof-of-work check costs a machine real computation while costing a person nothing.

**Will it work with my existing form?**

Yes. The change is a token on the form and one verification call on the server, so the form itself does not need redesigning.

**Can I charge AI crawlers instead of blocking them?**

Yes. AttestOS lets a site make crawlers either pay for access or stay out, instead of blocking all automation or allowing all of it.

**Is AttestOS accessible?**

It asks nothing of the visitor beyond submitting the form, so there is no visual or motor task to fail.

## Cite this

_AttestOS — AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check and one server-side verification. Source: https://attestos.whop.site_

Machine facts: https://attestos-v2.attestos.workers.dev/facts.json · Updated 2026-11-11