Software Licensing Addon

Software Licensing Addon

Developed By WHMCS

Compatible with WHMCS v8.10

Turn WHMCS into a digital software delivery platform with the WHMCS Licensing Addon. For software developers, by software developers.

Key Features

  • No License Limits - license an unlimited number of products with no limit on license keys.
  • Copy & Paste Integration - we provide the PHP licensing code ready for you to implement into your app.
  • Automatic License Activation - when the customer installs your app.
  • License Reissues - automates the process of moving an existing install to a new location.
  • License Key Generation - we allow you to define the license prefix & length for each product you wish to license.
  • Download Restrictions - only allow downloads for users with valid access plus support for enforcing Support and Updates requirements.
  • Local & Remote Keys - supports local key license validation with periodic remote checks.


License your own applications using the rock solid licensing solution used by WHMCS installations.

It's never been easier to package and sell your commercial web-based software applications and restrict their use according to your licensing agreements. Powerful, reliable and flexible, the WHMCS licensing addon combines the billing, client management and support features you know and love with software application licensing and digital delivery, turning WHMCS into the complete solution for Software Developers and SaaS based products.

Supporting both local and remote license keys, built-in redundancy means your application is not dependent upon your server being online and with copy & paste ready code for the PHP language and a simple API, integrating the WHMCS Licensing Addon to your application is easy.

Sell licenses the way you want:

  • Supports all billing cycles and billing features provided by WHMCS - prorata, late fees, and more
  • You control the prefix for your license keys allowing you to differentiate keys between products
  • Define the length of license keys you issue
  • Control how you restrict access: by domain, IP, installation directory or a combination of all 3
  • Support for "un-lockable" add-ons and extras within your licensed products

and much more!

Learn more about the Licensing Addon and how you can protect your PHP Applications in our feature spotlight on the blog.

If you have any questions, our sales team are ready and waiting to answer them for you.

November 3rd, 2022: Upgrade to WHMCS 8.6 for the latest ionCube encoding necessary for compatibility with PHP 8.1



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Alexandre Stamens @alexandre2175

October 2, 2022 at 08:59:31 PM

Does not work. The support does not answer my question. The docs and not even explain well.

  • 1 year ago

Michael Foland @michael5932

April 9, 2021 at 02:00:48 AM

Very solid module. I actually use this and have implemented new licensing features depending on the license key the client has. I've also built my own custom verification portal & report tool for invalid licenses. Learning the API has been a challenge at first, but it helps with expanding what the current version can do. I personally think that a lot of updates could be done to further enhance this addon.

  • 3 years ago

Gabriel Cox @gabriel7833

December 28, 2018 at 03:37:47 PM

No comment provided.

  • 5 years ago

Lucas Evans @lucas233

December 28, 2018 at 03:20:02 PM

No comment provided.

  • 5 years ago

Andre Bellafronte @eunarede

December 28, 2018 at 01:55:58 PM

No comment provided.

  • 5 years ago

Brontobytes Hosting @Brontobytes

February 10, 2018 at 01:13:31 AM

Very limited documentation but works well. Needs some improvement to make it easier and quicker to use/understand.

  • 6 years ago
  • Edited

Cas Eliëns @cascer1

December 1, 2016 at 07:33:36 PM

This module is very easy to implement, and the algorithm used to verify local keys can easily be modified into other languages.

I can't find an option to limit the versions available to a license like WHMCS uses for their owned licenses. Once a client stops paying for updates, they shouldn't be able to run a newer version than the last they paid for.

  • 7 years ago
  • Edited

Albert Abimanyu @El_makong

November 8, 2016 at 01:11:51 PM

it would be great to automatically add the license verification link on clientarea thou..

  • 7 years ago

Faude Emmanuel @A3526

May 30, 2016 at 03:03:12 PM

No comment provided.

  • 7 years ago

Tom Whiting @WHMCSGuru

May 22, 2016 at 05:37:02 AM

Rock solid. Haven't seen a single issue yet. Great addon for WHMCS.

  • 8 years ago

Joko Frank Oco @JFOC

April 29, 2016 at 10:28:35 AM

Need a discount to buy :D

  • 8 years ago

Stephen Smith @slightly-different

March 15, 2016 at 05:48:59 AM

If you're selling web based software this is a really nice easy to use licensing system.

  • 8 years ago

WHMCS Firewall @WHMCS360

March 15, 2016 at 05:43:51 AM

No comment provided.

  • 8 years ago

Kc Sharma @Kc

March 12, 2016 at 10:57:35 AM

No comment provided.

  • 8 years ago

WHMCS Services @whmcsservices

February 25, 2016 at 09:37:37 PM

No comment provided.

  • 8 years ago

Version Compatibility

Compatible with WHMCS v8.10

Full Version Compatibility

  • Selected versions of WHMCS v8.10
  • Selected versions of WHMCS v8.9
  • Selected versions of WHMCS v8.8
  • All versions of WHMCS v8.7
  • All versions of WHMCS v8.6
  • All versions of WHMCS v8.5
  • All versions of WHMCS v8.4
  • All versions of WHMCS v8.3
  • All versions of WHMCS v8.2
  • All versions of WHMCS v8.1
  • All versions of WHMCS v8.0
  • All versions of WHMCS v7.10
  • All versions of WHMCS v7.9
  • All versions of WHMCS v7.8
  • All versions of WHMCS v7.7
  • All versions of WHMCS v7.6
  • All versions of WHMCS v7.5
  • All versions of WHMCS v7.4
  • Selected versions of WHMCS v7.3
  • All versions of WHMCS v7.2
  • All versions of WHMCS v7.1
  • All versions of WHMCS v7.0
  • All versions of WHMCS v6.3
  • All versions of WHMCS v6.2
  • All versions of WHMCS v6.1
  • All versions of WHMCS v6.0
  • All versions of WHMCS v5.3

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By WHMCS


v3.0 Released February 9th, 2012

Latest Version

New Features Added:

  • Free Trial Option
  • Public License Verification Tool
  • Banned Domains
  • Intelligent Search Integration
  • Added Maximum Allowed Reissues Limit
  • Auto Logs Prune


Previous Versions

v2.0 Released October 1st, 2010

View/hide detailed changelog

  • Added client area ability to reissue licenses
  • Maintenance and bug fixes


v1.0 Released November 3rd, 2008

View/hide detailed changelog

  • Initial release


See also

Ranger - Sell license keys

Generate, distribute and validate license keys

WHMCS Language Editor

This module allows you to alter the language strings used throughout WHMCS.

Add To Header and Footer

This addon allows your to add html / php to the header / footer in the admin area / admin login page / clients area

WRA - RESTful Api addon for WHMCS

WHMCS addon for expose a RESTful API

Developers DebugBar

Simple and easy way to debug your current page (defined constants, request variables, queries)