Startup profile · funding coverage
Optimizely funding, valuation and investors
Enterprise A/B testing and experimentation platform; acquired by Episerver in 2020, now the combined company brand.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series C
$58M · October 2015
Latest known valuation
Not publicly disclosed
Total disclosed equity funding
$115M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
acquired
acquired · San Francisco, CA
Overview
Optimizely pioneered web experimentation for marketers, letting teams run A/B and multivariate tests without heavy engineering. Founded as part of Y Combinator W10, the San Francisco company grew into the category leader with 1,000+ customers including Nike, Uber, and Gap, running millions of experiments. Andreessen Horowitz led a $57M Series B in 2014; Index Ventures led a $58M Series C in 2015. Episerver agreed to acquire Optimizely in September 2020 for an undisclosed sum, completing the deal in October 2020 to merge experimentation with content and commerce. The combined company rebranded entirely as Optimizely in January 2021, offering a digital experience platform spanning CMS, commerce, feature flags, and progressive delivery.
Why Optimizely is interesting
Optimizely proved experimentation could be a standalone category before Episerver bought it and adopted its brand — the rare bundled suite that kept deep testing rather than checkbox A/B.
Product & use cases
Optimizely Web and Feature Experimentation let product and marketing teams test UI changes, roll out features gradually, and personalize experiences using server-side and client-side testing. Post-merger, the platform sits inside a broader DXP with content, commerce, and CMS modules.
- Website conversion optimization via A/B tests
- Feature flagging and progressive rollouts for product teams
- Personalization and AI-driven experience optimization at scale
Key facts
- YC W10 alum; category leader in web experimentation
- Series B (2014): $57M led by a16z
- Series C (2015): $58M led by Index Ventures
- Acquired by Episerver Oct 2020; rebranded as Optimizely Jan 2021
- 1,000+ customers; 2M+ experiments run pre-acquisition
Funding history (newest first)
Series C
2015-10 $58MSource: https://www.indexventures.com/perspectives/optimizely-series-c/
Investors in our directory
Funds linked from Optimizely's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: Optimizely built full-stack experimentation (client and server-side) with a large installed base and years of statistical rigor — harder to replicate than lightweight snippet tools.
Optimizely competed with VWO and AB Tasty on mid-market experimentation and with Adobe Target in enterprise DXP bundles. Its acquisition by Episerver bet that creation (CMS/commerce) plus optimization in one suite wins — a template later copied across martech.
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VWO direct
Lower-cost experimentation suite; less enterprise depth than Optimizely at scale.
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Adobe Target incumbent
Bundled with Adobe Experience Cloud; strong for Adobe shops, heavier implementation.
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LaunchDarkly adjacent
Feature-flag leader; overlaps on progressive delivery but not marketing experimentation.
Notable stories
- Episerver completed the acquisition Oct 2020 and rebranded the entire combined company as Optimizely by Jan 2021 — signaling which brand had stronger market equity.
Industries
Related funding articles
Venture Capital Tracker pieces that cover Optimizely's financing or category context.
FAQs about Optimizely
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