Optimizely
25,928 sites detectedA/B Testing · #2 of 27Updated October 2026
Companies using Optimizely
| # | Company | Industry | Location | First seen | Evidence |
|---|---|---|---|---|---|
| 1 | Developer Tools & Infrastructure | – | Apr 2026 | preconnect | |
| 2 | Cybersecurity | – | Apr 2026 | script | |
| 3 | Financial Services & Fintech | – | Apr 2026 | page code | |
| 4 | Financial Services & Fintech | London, GB | Apr 2026 | preconnect | |
| 5 | Hospitality & Travel | CO | Apr 2026 | script | |
| 6 | Financial Services & Fintech | – | Apr 2026 | script | |
| 7 | Education & Learning | New York, US | Apr 2026 | script | |
| 8 | Media & Content | – | Sept 2026 | signature | |
| 9 | Education & Learning | – | Apr 2026 | preconnect | |
| 10 | Media & Content | – | Apr 2026 | script |
See all 25,928 sites detected using Optimizely
Showing 10 of 25,928 sites detected. The customer list has every company, the new customers this month, filters and downloads.
Who uses Optimizely
New customers per week
Companies we saw start using it, from 21 September 2026.
By sector
65% of 128 sampled customers have a known sector.
By country
Country is known for 16% of 128 sampled customers.
Also used by these customers
Share of sampled Optimizely customers running each tool.
A/B Testing: share by companies
Optimizely is #2 of 27, with 24% of companies running a tool in this category.
How we found them
Share of sampled customers by where the evidence was.
Every company in the list shows which kind of evidence we found and when. Data quality
Every company using Optimizely
The customer list shows who they are, the evidence for each one and who started this month.