Prosopo - Human verification on the blockchain

Prosopo is the only fully decentralised human verification marketplace for substrate smart contracts, ensuring that Dapp Operators can block bots with minimal trust assumptions.

Seamless Integration

Decentralised

Anonymous

How it works

Prosopo is a low-trust human verification system allowing Distributed Apps (Dapps) in the Polkadot ecosystem to detect and block network activity generated by automated bots. This is achieved without reliance on centralised third parties.
Our network of Providers supply Dapps with verification challenges, such as CAPTCHAs, that identify if users are human. Providers that supply CAPTCHAs benefit from having their data labelled by Dapp Users
Providers may also offer alternative verification methods and charge Dapps a fee for the service.

Why Prosopo?

Prosopo is the only fully decentralised captcha marketplace for substate smart contracts, ensuring that Dapp Operators can block bots with minimal trust assumptions.

Feature	Google reCaptcha	hCaptcha	Effect AI	Prosopo
Decentralized	⚠	☆	✭	✭
Portable reputation	⚠	⚠	⚠	✭
Anonymous	✭	✭	⚠	✭
Open captcha marketplace	⚠	✭	⚠	✭
Low-trust smart contract bot protection	⚠	⚠	⚠	✭
Prioritises human verification over data labelling	⚠	⚠	⚠	✭

About

We're still building our bot prevention system for smart contracts but please get in touch if you would like more info or early access to our beta testing programme when it arrives.

Find out how you can use Prosopo to secure your smart contracts against bots

Stop smart contract bots

Find out how you can use Prosopo to generate labelled data by offering human verification services

Generate labelled data

Check out the code and read the documentation on Github

View the Code