Technology report · A/B testing
Optimizely usage report
Optimizely, an A/B testing tool, was detected on 441 of the 66086 websites scanned as of 2026-10-28, a share of 0.7%. Industry is known for only 70 of those sites, where E-commerce and retail leads at 24.3%, followed by Software and SaaS at 20.0%. Google Tag Manager appears on most of these sites.
- 441websites using it
- 0.7%of 66,086 scanned websites with a detected technology
- 2026-10-28data date
Industry labels are available for 70 of the 441 sites, so this breakdown covers a smaller group than the full count. Within it, E-commerce and retail accounts for 17 sites (24.3%) and Software and SaaS for 14 sites (20.0%). Finance and banking has 7 sites (10.0%), Education has 6 (8.6%), and Nonprofits have 4 (5.7%).
Google Tag Manager is the most common companion technology, present on 343 sites (77.8%). Cloudflare follows on 196 sites (44.4%), then jQuery on 130 (29.5%) and OneTrust on 129 (29.3%). PHP appears on 118 sites (26.8%), React on 107 (24.3%), Next.js on 88 (20.0%) and Tailwind CSS on 82 (18.6%). These show what sites running Optimizely commonly use alongside it.
The scan covered 66086 sites, and Optimizely was found on 441 of them, a 0.7% share. Version detection returned no results: 0 sites had a version identified, so this page cannot tell you which releases are in use. Treat the industry and stack figures as a profile of sites using it on 2026-10-28, not as a ranking of tools.
Industries using Optimizely
| Industry | Websites | Share of 70 classified |
|---|---|---|
| E-commerce and retail | 17 | 24.3% |
| Software and SaaS | 14 | 20% |
| Finance and banking | 7 | 10% |
| Education | 6 | 8.6% |
| Nonprofits | 4 | 5.7% |
Technologies used together with Optimizely
| Technology | Websites | Share of Optimizely sites |
|---|---|---|
| Google Tag Manager | 343 | 77.8% |
| Cloudflare | 196 | 44.4% |
| jQuery | 130 | 29.5% |
| OneTrust | 129 | 29.3% |
| PHP | 118 | 26.8% |
| React | 107 | 24.3% |
| Next.js | 88 | 20% |
| Tailwind CSS | 82 | 18.6% |
Example company websites
jrebel.com, admiral.com, wexphotovideo.com, ajbell.co.uk, luckybrand.com
FAQ
- How many websites use Optimizely?
- Optimizely was detected on 441 of the 66086 websites scanned, which is a 0.7% share. The data date is 2026-10-28, and the tool is classed in the A/B testing category.
- Which industries use Optimizely the most?
- Among the 70 sites with a known industry, E-commerce and retail is largest with 17 sites (24.3%), then Software and SaaS with 14 (20.0%), Finance and banking with 7 (10.0%), Education with 6 (8.6%) and Nonprofits with 4 (5.7%).
- What technologies are commonly used with Optimizely?
- Google Tag Manager is found on 343 Optimizely sites (77.8%), Cloudflare on 196 (44.4%), jQuery on 130 (29.5%) and OneTrust on 129 (29.3%). PHP, React, Next.js and Tailwind CSS also appear.
- Which Optimizely versions are in use?
- This page cannot say. Versioned sites number 0, meaning no version was identified on any of the 441 sites, so no version breakdown is reported.
Check your own list
Run the same detection on the websites you care about, or browse popular sites in the Tech Stack Index.