No hassle web app licensing

The instant solution to worrying less about your web applications being copied by the clients you developed them for.

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You are an honest, very skilled web developer, delivering awesome web apps to your clients all over the world. Even though most of these apps run on a server only you or your team have access to, there is the occasional client which wants your code on their server.

On premis deployment gives them full access to your code, introducing the risk of them copying it and using it in a way they were not supposed to. And since the price they paid covers only one copy of the application, you are going to prevent this from happening. allows you to generate unique license keys for applications you made, and offers you a one line solution (in combination with a 0.8KB JavaScript file) into protecting your applications from being copied. Invalid use will be reported to you by email or Slack, and if you want, further access to the application is prevented by showing an Access Denied message which you can fully customize.

Get notified about breaches
Email and Slack notifications when your app is used w/o a valid license.
Configure your licenses
(temporarily) deactivate or limit license usage based on domain.
Custom styling per application
Show an error page which matches the look of your web app.

Simple yet powerful dashboard

Keep your license keys organised per application and see what is going on at a glance.

Easy to install, hard to break

Download your application-specific JS file and add one HTML meta tag to your project.
Don't worry, if the meta tag is removed you'll still be in control. Read our FAQ.


Get notified as soon as something fishy is going on

We'll send you an email message as soon as your application is used with an invalid license key. Like Slack? So do we. Simply add your webook URL and we'll notify you there too.

Choose your plan

All plans are monthly and can be cancelled at any time. Looking for a tailored solution? Send us an email


  • up to 20 applications
  • up to 50 licenses per application
  • Custom error message and styling
  • Auto application detection


  • up to 100 applications
  • Unlimited number of licenses
  • Custom error message and styling
  • Auto application detection

Start 7 day free trial

*= all subscription plan prices are excluding applicable VAT.

Frequently Asked Questions

What happens when I use your service?

When you use your application specific Javascript file and add the license key meta tag to your application's HTML, we'll validate the use of your application on pageload with a GET request to our server. We'll check our records to see if a valid license is used and that the license is used on an allowed domain. If not, we'll show the user an Access Denied page (which you can customize) and notify you about the breach.

Doesn't that slow down my application?

No, not at all. The GET request is sent asynchronously and your application will run just fine until it receives a response and either grants or refuses access. In a very bad scenario where our service is slow, the worst thing that happens is a user being able to use the web app for a couple of seconds before it is denied access.

Validating each pageload, isn't that overkill?

Definitely, that's why we don't. Whenever a valid license key is used and access is granted, we'll place a small cookie. Until that cookie has expired (after 7 days), we won't check again. Keep this in account when testing and clear your cookies before reloading if you are expecting something to happen.

What prevents my client from removing the license validation from the code they are trying to copy?

Most importantly, by the time they realise that license validation is in place, it's too late for them. You will have been notified about a breach and can take action accordingly. Besides, we strongly recommend to let our JavaScript file blend in with the rest of your application's JavaScript. Webpack, compress and uglify the best you can, to make the code responsible for validation as difficult as possible to find and break.

But what if my client simply removes the meta tag from the HTML code? That's something anyone can do!

That's right! Luckily, we came prepared. If no (or an invalid) license key is found, access to the application is denied and based on the application uuid (embedded in the JavaScript file you'll download for your application), we will find you and tell you what happened. Things get a bit more complicated if the application uuid is changed or removed from that JavaScript file, but Auto application detection is your friend.

Auto application detection? Sounds awesome, tell me more.

Sure. Whenever we receive a validation request and grant access, we create a fingerprint of the page from which the validation was requested. Then, when we deny access to a page which did not provide a (valid) application uuid, we try to match the fingerprint of that page with one of the ones we indexed. This means that in many cases, we will still be able to notify you about invalid use of your application.

And what if I don't have Auto application detection in my plan?

Access to the application will be denied, and the default error page will be shown. Your client will then realise that what they are doing is a bad idea, will call you and ask if it is possible to pay a lot of money for another copy of your awesome software*.

* = at least, that is what we hope.