Episerver
A software brand known for enterprise web content management, digital commerce, personalization, and digital marketing products.
Last updated August 31, 2026
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Overview
Episerver was a Swedish enterprise software company and brand that developed platforms for managing websites, digital content, online commerce, marketing automation, personalization, and related digital experiences. The business began in Stockholm in 1994 as Elektropost Stockholm AB, founded by Mikael Runhem. Its initial work focused on internet-based electronic mail, but it subsequently moved toward tools that enabled organizations to create and manage websites. The first version of its EPiServer content-management platform appeared in 1997, and the first known live installation was deployed for Scandinavian Leisure Group in 1998. The company established its principal market identity through web content management. Its software was designed for organizations that needed centralized editorial workflows, structured content, multilingual publishing, permissions, integrations, and management of multiple digital properties. EPiServer CMS 4.0, released in 2002 and built on Microsoft's .NET Framework, marked an important stage in the platform's enterprise development. A later .NET-based version, EPiServer CMS 5, arrived in 2007. In 2006, Elektropost Stockholm AB changed its name to EPiServer AB, aligning the corporate identity more closely with its best-known product. During the 2010s, Episerver expanded beyond website management through ownership changes, acquisitions, and product consolidation. The company was acquired by IK Investment Partners in 2010 and was later associated with Accel-KKR, which also acquired Ektron, another content-management software provider. Episerver acquired Mediachase in 2012 to strengthen commerce and collaboration capabilities, followed by the Swedish enterprise-search provider 200OK and search company Euroling. In January 2015, Episerver and Ektron merged. The combined business brought together complementary CMS products and positioned the company as a broader digital-experience vendor rather than solely a web-content-management specialist. Following the Ektron combination, the company consolidated its software into the Episerver Digital Experience Cloud. It released a major post-merger platform update in June 2015 and changed the written brand style from EPiServer to Episerver later that year. Further acquisitions broadened the offering: Peerius added commerce personalization in 2016, Optivo added email-marketing automation, idio.io contributed content intelligence in 2019, and Insite Software expanded business-to-business commerce capabilities. These additions supported a platform strategy covering content, commerce, search, personalization, marketing automation, and analytics-oriented capabilities. Insight Venture Partners acquired Episerver in 2018. In late 2019, Alexander Atzberger became chief executive, after serving as President of Customer Experience at SAP. In October 2020, Episerver acquired Optimizely, a company associated with digital experimentation and optimization. In January 2021, Episerver announced that it would adopt the Optimizely name. As a result, Episerver ceased to be the primary commercial brand, while much of its technology and customer proposition continued within the Optimizely digital-experience platform. The historical Episerver brand is therefore best understood as a predecessor brand and product family within the active Optimizely business.
History
Episerver originated in Stockholm in 1994 as Elektropost Stockholm AB, founded by Mikael Runhem. The company initially worked with internet-based electronic mail before shifting toward tools for building and administering websites. It introduced the first version of the EPiServer CMS product in 1997, and Scandinavian Leisure Group became the first reported live installation in 1998. This early focus on practical website publishing established the product line that later became the company's central business. The platform developed into an enterprise web-content-management system. EPiServer CMS 4.0, released in 2002, was based on Microsoft's .NET Framework, and version 5 followed in 2007. The corporate name changed to EPiServer AB in 2006. The business subsequently became investor-owned; its owners in 2010 included Amadeus Capital, Martin Bjäringer, Monterro Holdings, Northzone Ventures, Mikael Runhem and employees and family members. In late 2010, the investor group sold the company to IK Investment Partners through the IK 2007 Fund. The business was later sold to Accel-KKR, which had also acquired Ektron. Episerver pursued a broader software strategy through acquisitions. Mediachase was acquired in March 2012, bringing commerce and collaboration capabilities. In May 2012, Episerver acquired Swedish enterprise-search provider 200OK, and in May 2013 it acquired Swedish search provider Euroling. These transactions helped move the company beyond a conventional CMS category toward a portfolio covering content, commerce, and search. A decisive change came in January 2015, when Episerver and Ektron merged. Mark Duffell became President and CEO, James Norwood became Executive Vice President of Strategy and CMO, and Martin Henricson, who had led the former Episerver business, became Executive Chairman. The combined company consolidated its technology into the Episerver Digital Experience Cloud and released a major platform version in June 2015. Later that year, it changed the brand presentation from EPiServer to Episerver and introduced the shortened Epi form. The company continued to add specialized capabilities. In August 2016 it acquired London-based Peerius, a commerce-personalization provider; the technology was subsequently integrated as EpiPersonalization. In October 2016 it acquired Berlin-based Optivo, an email-marketing automation provider. In November 2019 it acquired idio.io, which supplied content-intelligence technology. In December 2019 it acquired Insite Software, extending its B2B commerce capabilities. Also in December 2019, Alexander Atzberger joined as CEO. Insight Venture Partners acquired Episerver in September 2018 in a deal reported at about $1.16 billion. The company's final major identity transition followed its October 2020 acquisition of Optimizely, a digital-experimentation company. In January 2021, Episerver announced that it was rebranding as Optimizely. The Episerver name consequently became a historical brand and product lineage within the Optimizely business rather than the name of the continuing operating company.
- 2021
Rebranded as Optimizely
[1]The company announced that it would operate under the Optimizely name, ending Episerver's role as the primary corporate brand.
- 2020
Optimizely acquisition
[1]Episerver acquired digital-experimentation company Optimizely.
- 2018
Acquired by Insight Venture Partners
[1]Insight Venture Partners acquired Episerver in a transaction reported at approximately $1.16 billion.
- 2016
Personalization and email automation expansion
[1]The acquisitions of Peerius and Optivo added commerce personalization and email-marketing automation.
- 2015
Ektron merger and platform consolidation
[1]Episerver merged with Ektron, consolidated the products into its Digital Experience Cloud, and released a major post-merger platform update.
- 2012
Mediachase and 200OK acquisitions
[1]Episerver expanded into commerce, collaboration, and enterprise search through two acquisitions.
- 2007
EPiServer CMS 5 launched
[1]The company released its second major .NET-based CMS version.
- 2006
Corporate name changes to EPiServer AB
[1]Elektropost Stockholm AB adopted the EPiServer name.
- 2002
EPiServer CMS 4.0 launched
[1]The fourth major CMS version was launched on Microsoft's .NET Framework.
- 1998
First live installation
[1]Scandinavian Leisure Group deployed the first reported live installation of Episerver.
Products and positioning
Enterprise digital experience platform combining content management, commerce, marketing, personalization, and related customer-experience tools.
Web content management · 1997
EPiServer CMS
Episerver's core content-management product enabled organizations to create, organize, publish, and govern website content. Its enterprise orientation included structured publishing, editorial workflows, access control, and support for organizations managing multiple digital properties. The product evolved from the late-1990s EPiServer platform through .NET-based releases and later became part of the broader Episerver digital-experience portfolio.
Digital experience platform · 2015
Episerver Digital Experience Cloud
The Digital Experience Cloud was Episerver's consolidated platform strategy after the Ektron merger. It brought content management together with digital commerce, personalization, marketing automation, search, and related customer-experience capabilities. The platform represented the company's effort to provide an integrated enterprise stack rather than a standalone CMS.
Digital commerce
Episerver Commerce
Episerver Commerce was the brand's commerce offering for organizations operating digital storefronts and broader online sales experiences. It became more significant as Episerver acquired commerce-related businesses and positioned content and commerce as connected components of its enterprise digital-experience platform, including support for business-to-business use cases.
Commerce personalization · 2016
EpiPersonalization
EpiPersonalization was the Episerver-integrated form of technology obtained through the acquisition of Peerius in 2016. It supported personalized commerce experiences by using customer and behavioral signals to tailor recommendations and digital interactions. The capability complemented Episerver's CMS and commerce products.
Email marketing automation · 2016
Optivo
Optivo was an email-marketing automation business acquired by Episerver in 2016. Its capabilities expanded Episerver's marketing scope beyond web publishing and commerce into campaign execution and automated customer communications.
Brand decisions
2021
Adopt the Optimizely brandStrategyBackground
Following its acquisition of Optimizely, Episerver had an opportunity to unify its platform around a broader digital-experience and optimization identity.
Action taken
The company announced that it would rebrand as Optimizely.
Aftermath
Episerver became a historical brand and product lineage within the Optimizely business.
2020
Acquire OptimizelyM&ABackground
Episerver sought to add digital experimentation and optimization to its existing content, commerce, and marketing portfolio.
Action taken
Episerver acquired Optimizely in October 2020.
Aftermath
The acquisition led to the announcement in January 2021 that Episerver would rebrand as Optimizely.
2015
Merge with EktronM&ABackground
Episerver and Ektron were both established content-management software businesses, and their combination offered a larger product portfolio and customer base.
Action taken
The companies merged and appointed Mark Duffell as President and CEO, James Norwood as strategy and marketing executive, and Martin Henricson as Executive Chairman.
Aftermath
Episerver consolidated the software into the Digital Experience Cloud and released a major post-merger platform update.
Recent events
- 2021
Episerver acquires Optimizely and adopts the Optimizely brand[1]
M&A
After acquiring Optimizely in October 2020, Episerver announced in January 2021 that the company would operate under the Optimizely name.
- 2019
Alexander Atzberger becomes Episerver CEO[1]
Leadership change
Alexander Atzberger, previously associated with SAP's customer-experience business, joined Episerver as chief executive.
- 2018
Episerver is acquired by Insight Venture Partners[1]
M&A
Insight Venture Partners acquired Episerver in a transaction reported at approximately $1.16 billion.
- 2015
Episerver and Ektron merge[1]
M&A
The two content-management software businesses combined, creating a larger platform vendor with complementary products and customers.
- 2015
Episerver changes its brand styling[1]
Other
The company changed the written form of its brand from EPiServer to Episerver and also used the shorter name Epi.
- 2012
Episerver acquires Mediachase[1]
M&A
The acquisition added software associated with electronic commerce and collaboration to Episerver's web-platform business.
- 2012
Episerver acquires 200OK[1]
M&A
Episerver purchased the Swedish enterprise-search provider 200OK, broadening its ability to support search within digital properties.
Sources4 sources
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