web3 way to fight spam

nCaptcha helps to get rid of spam via microtransactions and on-chain reputation scoring

Stop spam and earn!


Built on NEAR

Smart contract written in secure Rust


Earn reward

Win-Win-Win web3 solution for captcha


Open Source

Free to download


Built on JS

Supported by popular browsers

Revolutionary way to fight spam!

nCaptcha changes the rules!
Instead of bothering your users with idiotic pictures and texts recognition nCaptcha employs web3 micro-transactions to stop bots completely and help users build their reputations

  • Decentralized back-end
  • Efficient and robust
  • Open sourced
  • Win-win-win approach

Full integration and support for most popular tools and platforms. If there’s an integration missing that you need, let us know and we’ll happily add support.

  • WordPress comments plugin
  • No smart contract needed
  • Form plugins
  • Available as NPM package
Mobile ready

Fully responsive

WordPress Friendly

Full support for WordPress contact forms and comments

web3 focused

Elegantly connects Web2 to web3

Trusted by happy early adopters

Don’t just take our word for it, hear what members of our friendly community have to say about us


Spam is OVER at Techbridge



nCaptcha is one of the most promising projects on NEAR



Join the movement

Your name

Get started any way you want

Use nCaptcha on your WordPress site or any other web app

nCaptcha Gravity Forms Add-on

  • Easy installation and setup
  • No smart contract required
  • Community support

JS embed

  • Easy installation
  • Developer friendly
  • Available as NPM
  • Community support

nCaptcha Contact Form 7 plugin

  • Easy installation and setup
  • No smart contract required
  • Community support


Frequently asked questions

How does nCaptcha work?
nCaptcha allows websites to vet out spammers from submitting to forms by requiring mini-deposits.
Do I need NEAR account to start using nCaptcha?
Yes, read more how you can create NEAR account here
Do I need to create smart contract?
No, you do not need to write and deploy a smart contract.

Question not answered above? Contact us

Ready to stop spam submissions to your forms?

Stop spam and earn!