Looking for an Optimizely alternative?
Optimizely does not publish pricing. Figures on this page reference third party estimates, marked as such. Checked on 7 July 2026.
Optimizely is a good tool for enterprise experimentation. People rarely leave it because it is broken. They leave because they do not need enterprise scale, they do not want a quote only sales process, or they want a published price and a real free tier. If any of those is you, here is an honest look at whether ABTestly fits.
Why people go looking
Three reasons come up again and again.
The pricing is quote only. Optimizely publishes no list price. Third party estimates put Web Experimentation in the tens of thousands of dollars a year, commonly cited around $25k to $40k, and $200k plus at enterprise scale. For a small team, that is an enterprise sales cycle before the first comparison.
You do not need enterprise scale. Full stack experimentation, feature flags, program management, and dedicated CSMs are useful if you have a team running hundreds of experiments across products. If your team runs client side A/B tests on a website, most of that surface is paid for and unused.
No free tier. Optimizely offers no documented permanent free plan. Validating the tool requires a sales conversation.
What ABTestly does differently
ABTestly is A/B testing built for the edge. Code first, served from Cloudflare's network in 300 cities, with the statistics shown in full.
- Pricing published on one page. Free $0, Starter $99 / mo, Pro $249 / mo (100,000 MTU), Business $549 / mo, Enterprise custom pricing. No talk to sales for the first four.
- A snippet built to stay out of your way. ~27 KB gzipped runtime, loader under 1.5 KB, config served from the edge with no origin round trip.
- Experiments defined in JSON and authored in Monaco. They diff, they review, they live in your repo if you want them to.
- Three statistics engines available. Frequentist on every plan. Sequential and Bayesian on Pro, applied to both conversion and revenue.
- Statistics you can audit. Every lift ships with a confidence or credible interval, depending on the method. A built in sample ratio check flags broken splits. The full methodology is public in our docs.
- No automatic overage charges. Notified at 80% and 100% of your MTU limit. No surprise invoice.
- A permanent free plan with 1 experiment and 3,000 MTU. Test the product on a real page before paying anything.
Where Optimizely genuinely wins
Honesty matters more to us than the sale, so.
- You need enterprise experimentation scale. Full stack, server side, feature flags, multi arm, and program management tooling. ABTestly is client side A/B testing.
- You need a peer reviewed sequential Stats Engine. Optimizely publishes theirs.
- You need a dedicated CSM, phone support, and enterprise SLAs.
- You have procurement asking for MSAs, BAAs, and formal compliance certifications.
If none of those are blockers, published pricing and a permanent free tier are worth the try.
Try it in an afternoon
The ABTestly free plan lets you validate the tool without a sales conversation. Drop the snippet on one page, define one variant, watch the events land in your dashboard, and confirm the numbers agree with anything you already run.
Quick answers
Why do teams look for an Optimizely alternative?
Quote only pricing that takes an enterprise sales cycle to see, a platform scaled for hundreds of experiments across products when the team only needs client side A/B testing on a website, and no permanent free tier to validate the tool without a sales conversation.
How much does Optimizely cost versus ABTestly?
Optimizely is quote only and does not publish pricing. Third party estimates (not Optimizely's official figures) put Web Experimentation roughly in the tens of thousands of dollars a year, commonly cited around $25k to $40k, and $200k plus at enterprise scale. ABTestly publishes its pricing: Pro is $249 / mo, or $199 / mo billed annually, for 100,000 monthly tracked users. See the full Optimizely pricing breakdown.
Does ABTestly do server side experimentation and feature flags like Optimizely?
No. ABTestly is client side A/B testing focused. If you need server side experimentation, feature flags, and full stack testing, Optimizely serves you better today.
Can I try ABTestly without a sales call?
Yes. The free plan is permanent: 1 experiment and 3,000 monthly tracked users, no card. Paid plans carry a 30 day money back guarantee on your first paid month. Current plans and limits are on the pricing page.
Optimizely does not publish pricing. Third party estimates cited. Checked on 7 July 2026. ABTestly is not affiliated with Optimizely.