System requirements for Optimizely

Note: These system requirements are the latest and apply to versions higher than 7.5 of the Optimizely platform. See Installing Optimizely updates how to upgrade. See requirements and deviations below for product and service-specific requirements. See Archive for legacy versions of system descriptions.

System requirements for the Optimizely platform

Server requirements
Operating system

Any of the following:

  • Linux (From CMS 12, see .NET 5 support here for details on supported distributions and versions)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2016 (End of support January 2022, Microsoft offering extended support options until January 2027)
  • Microsoft Windows Server 2012 R2 (End of support, Microsoft offering extended support options until October 2023)

All service packs are supported.

Note: From CMS 9, Windows Server 2008/2008 R2 and Windows 7 are no longer supported. From CMS 12, Windows Server 2012 is no longer supported.

Web server

CMS 12 and higher: Any ASP.NET Core compatible hosting option.

CMS 11 and lower: Any of the following must be installed as part of the Windows Server installation:

  • Microsoft Internet Information Services (IIS) 10
  • Microsoft Internet Information Services (IIS) 8.5

Note: From CMS 9, IIS 7.0 and 7.5 are no longer supported. From CMS 12, IIS 8.0 is no longer supported. 

Database

Any of the following:

  • Microsoft Azure SQL
  • Microsoft SQL Server 2019
  • Microsoft SQL Server 2017 (End of support October 2022, Microsoft offering extended support options until October 2027)
  • Microsoft SQL Server 2016 (End of support, Microsoft offering extended support options until July 2026)
  • Microsoft SQL Server 2014 (End of support, Microsoft offering extended support options until July 2024)
  • Microsoft SQL Server 2012 (End of support, Microsoft offering extended support options until July 2022)
  • Microsoft SQL Server 2012 Express (End of support, Microsoft offering extended support options until July 2022)

All service packs are supported.

Note: From update 163, Microsoft SQL Server 2008 is no longer supported.

Other requirements
  • Microsoft .NET 5.0 and higher (CMS 12 and higher)
  • Microsoft .NET Framework 4.6.1 and higher (CMS 11 and lower)
    Note: After 2015, Microsoft .NET Framework 4.5.0 and 4.5.1 are not supported. From CMS 11, 4.6.x is required. From CMS 12, .NET Framework 4.x is no longer supported.

Note: In a production environment, an instance bound license is required for cloud-based solutions. For non-cloud environments, a permanent IP or MAC address is required.

Client requirements for EDITING
Browser for editing

CMS 12, the latest major release, supports:

  • Mozilla Firefox, latest**
  • Google Chrome, latest**

CMS 11 supports:

  • Mozilla Firefox, latest**
  • Google Chrome, latest**

CMS 10 supports:

  • Microsoft Internet Explorer 11*
  • Mozilla Firefox 22-57
  • Google Chrome 45-62

CMS 9 supports:

  • Microsoft Internet Explorer 11*
  • Mozilla Firefox 14-22
  • Google Chrome 33-45

CMS 8 supports:

  • Microsoft Internet Explorer 11*
  • Mozilla Firefox 11-14
  • Google Chrome 12-33

* For Commerce Manager, see product-specific requirements.

** Due to fast release cycles, we only support the two latest versions for these.

Client requirements for BROWSING
Browser for viewing The supported web browsers for viewing depend on the implementation. Most standard web browsers are generally supported. 
Development and demonstration environment
Operating system

Any of the following:

  • Linux (From CMS 12, see .NET 5 support here for details on supported distributions and versions)
  • Mac OS (From CMS 12, see .NET 5 support here for details on supported versions)
  • Microsoft Windows 11
  • Microsoft Windows 10
  • Microsoft Windows 8.1 (End of support, Microsoft offering extended support options until January 2023)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2016 (End of support January 2022, Microsoft offering extended support options until January 2027)
  • Microsoft Windows Server 2012 R2 (End of support, Microsoft offering extended support options until October 2023)

Note: From CMS 9, Windows Server 2008/2008 R2 and Windows 7 are no longer supported. From CMS 12, Windows Server 2012 and Windows 8 are no longer supported.

Development tool

CMS 12 and higher:

CMS 11 and lower, any of the following:

  • Microsoft Visual Studio 2022
  • Microsoft Visual Studio 2019

Notes:

  • The Episerver Visual Studio integration installation requires IIS Express (included with VS 2015 and higher, can also be installed using Web Platform Installer).
  • Always install the latest updates for Visual Studio.
  • Visual Studio 2019 version 16.8 or higher is required for developing .NET 5.0 (CMS 12) applications.
Database

Any of the following:

  • Microsoft Azure SQL
  • Microsoft SQL Server 2019
  • Microsoft SQL Server 2017 (End of support October 2022, Microsoft offering extended support options until October 2027)
  • Microsoft SQL Server 2016 (End of support, Microsoft offering extended support options until July 2026)
  • Microsoft SQL Server 2014 (End of support, Microsoft offering extended support options until July 2024)
  • Microsoft SQL Server 2012 (End of support, Microsoft offering extended support options until July 2022)
  • Microsoft SQL Server 2012 Express (End of support, Microsoft offering extended support options until July 2022)

Notes:

  • The Episerver Visual Studio integration installation requires SQL Server Express (included with VS 2015 and higher, and can also be installed using Web Platform Installer).
  • From update 163, Microsoft SQL Server 2008 is no longer supported.
Other requirements

MVC 5.2.3 (for CMS 11)

Product-specific requirements and deviations

Optimizely Digital Experience Platform (DXP)

Optimizely Commerce

Optimizely Forms

  • Optimizely Forms is only supported by MVC-based websites and HTML5-compliant browsers.

Last updated: Sep 28, 2021