Flattern WHMCS Template

Flattern WHMCS Template

Developed By Cmsbased

Compatible with WHMCS v7.6

Flattern was designed with a core focus on customization and integration. Open layout allows to add extra header, footer and sidebars. Includes WHMCS addon to extend template functionality.


  • Mobile first Bootstrap 3 framework.
  • Includes 1 year of priority support with theme updates.
  • Override template files with your own design, it wont be overwritten by future updates.
  • Change color, cart settings and display options via WHMCS admin area.
  • Internet Explorer 8+, Firefox, Chrome, Opera, Safari and mobile browsers.



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Arjen Kocken @arjen4010

January 17, 2021 at 01:19:00 PM

We here looking for a WHMCS template, that don't looks directly like a WHMCS portal. Also we where looking for a template that was fitting in our own design and can be integrated with our website. We wanted to let the client feel that they are still on the same website, when switching between our website and the client area and vice versa.

After testing some themes I found Flattern and Hexa, and directly I get the feeling that it's not looking like default WHMCS and it feels much more professional. When trying and testing both products, I was knowing that this is the right theme for us.

The theme is very looking and feeling very professional in frontend and backend, easy to setup / use and higly customizable. The only thing is, we are no webdesigners, we are system administrators and programmers of dev-ops. So I contacted CMSbased if they can built customized theming based on Flattern.

I told my wishes about our current Divi based website, and how I like to see a good integration for my clients so they feel comfortable in the website and client area. After some communication, they started to create my custom theme. And they did exactly what I was asking for, really the work is more than appreciated.

So I can advise everybody to at least try this themes and remember, they could build very nice custom templates too.

I'm happy to start 2021 with a complete integrated, not WHMCS default looking template.

Kind regards!

  • 1 year ago

Bradley Porter @SaneChoice

April 18, 2017 at 10:01:47 PM

FLATTERN is our current WHMCS template. It is extremely flexible and customisable (within the Admin Panel and via template changes) and provides a great experience for the user. Support from the CMSBased Team has been excellent and responsive. It is hard to find committed partners but we absolutely enjoy our relationship with CMSBased and using their products.

  • 5 years ago

Version Compatibility

Compatible with WHMCS v7.6

Full Version Compatibility

  • Selected versions of WHMCS v7.6

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 Cmsbased


v3.2 Released November 1st, 2016

Latest Version

PHP 7 and WHMCS 7.0.1 support.


Previous Versions

v2.7 Released April 2nd, 2016

View/hide detailed changelog

WHMCS 6.3 Compatibility


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Lara, WHMCS Admin Theme

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Control Theme

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Lagom WHMCS Client Theme

Fully responsive WHMCS client area theme offering the choice of different styles and layouts for the ultimate user experience.