Optimizely

Former Google product managers Dan Siroker and Pete Koomen founded the original Optimizely in 2010 after Siroker used experimentation on Barack Obama's 2008 campaign and saw that non-engineers needed a simple way to run A/B tests. The YC W10 company grew from a visual website-testing tool into enterprise feature experimentation and personalization, raising roughly $194m equity plus a $55m credit facility. Episerver—an older Swedish-origin CMS/commerce company owned by Insight Partners—acquired it in October 2020 for an undisclosed amount reported around $600m, then renamed the entire combined Episerver organization Optimizely. Consequently today's Optimizely is not simply the original startup: it combines Episerver CMS/Commerce/Search, original Optimizely experimentation, Insite B2B commerce, Idio personalization, Zaius customer data and Welcome content marketing/planning. Current 'Optimizely One' and Opal agent products span campaign planning, content, commerce, data and experimentation for more than 10,000 brands. Pricing is entirely customized by modules, traffic/usage, seats and service level. Original startup backers included YC, Battery, GV, Benchmark, Andreessen Horowitz, Index, Bain Capital Ventures, Citi Ventures, Goldman Sachs Growth and Accenture Ventures. Its independent fund total is frequently confused with capital raised by the post-merger Episerver/Optimizely entity, including a reported $1.1b 2024 debt refinancing; this profile preserves those scopes separately. Current risks include complex suite integration, high enterprise implementation cost, crowded DXP/marketing stacks, privacy/consent obligations, experimentation misuse or statistical error, and PE leverage.

Founding story

Siroker translated campaign experimentation into an easy web product; Koomen brought Google product/engineering experience, and their YC prototype let marketers change/test pages without repeated code deployments.

Business model

Enterprise digital-experience/marketing SaaS suite with cloud subscriptions, usage/traffic components, implementation, support and partner services.

Custom annual subscriptions by product modules, users, environments and digital traffic/consumption; premium support/implementation and partner-delivered services.

Traction

Optimizely says 10,000+ brands use the platform. The original company reportedly exceeded $100m ARR and 1,000 enterprise customers before acquisition; combined-company audited revenue, retention and profitability are private.

Latest developments

Optimizely markets an AI-enabled operating system for marketers with Opal agents, Agentic Experimentation, omnichannel Campaign, CMS, Commerce and Data Platform, while maintaining enterprise experimentation APIs and Stats Engine.