| Feature |
Zyro |
Optimizely |
|
Speed Impact (Latency)
How much it slows down your site.
|
< 50ms |
100-300ms |
|
Visual Editor Flicker
Does the original content flash before the test?
|
Zero (Anti-Flicker) |
Frequent |
|
Statistical Model
How we calculate winners.
|
Bayesian + Bandit |
Frequentist (Slow) |
|
Revenue Attribution
Can it track full-path ROI?
|
Native Integration |
Requires Add-ons |
|
Starting Price
Monthly cost for startups.
|
$0 / Free Tier |
~$35,000 / Year |
|
Setup Time
|
2 Minutes |
Weeks (Sales Call) |
1. Performance: Speed vs. Bloat
Optimizely was built in 2010. Its "synchronous" script blocks your website from loading until it decides what variation to show. This hurts your Core Web Vitals and SEO.
Zyro runs on a modern, edge-cached architecture. Our script loads asynchronously and uses "Optimistic Hiding" to ensure zero flicker without slowing down your Largest Contentful Paint (LCP).
2. The "Peeking" Problem
Optimizely uses traditional Frequentist statistics. This means you have to decide on a sample size upfront (e.g., 50,000 visitors) and you cannot look at the results until it finishes, or you invalidate the math.
Zyro uses Sequential Bayesian statistics and Multi-Armed Bandit algorithms. You can peek at results daily. If a variation is losing money, our Bandit algorithm automatically cuts traffic to it, saving you thousands in lost revenue.
Ready to modernize?
Import your existing experiments and start testing in minutes. No sales calls required.
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