GrowthBook vs Optimizely CMS
Zero of fourteen models named GrowthBook first on the direct prompt; one named Optimizely CMS. GrowthBook was named by ten of the fourteen models and Optimizely CMS by fourteen and GrowthBook carries 24 labels and Optimizely CMS 61, so the shares are not directly comparable.
Named in two categories this edition.
By Optimizely, San Francisco, United States, founded 2010. Named in six categories this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the experimentation and personalization page.
By framing
GrowthBookFirst choices, of fourteen modelsOptimizely CMS
Across every category in the November 2026 Edition, GrowthBook and Optimizely CMS were named in the same answer fifty-eight times, of the 92 answers naming GrowthBook and the 259 naming Optimizely CMS. In those answers Optimizely CMS took the first choice eight times and GrowthBook fifteen.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | | |||
| GPT-5.4 mini | | | | | ||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | | | | |
| Grok 4.20 | | | | | | |
| Mistral Small | | | | |||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | | | | | |
| GLM 4.7 FlashX | | | | |||
| MiniMax M2.5 | | | | | | |
| GPT-6 Luna | | |||||
| Muse Glimmer 30B | | | | | |
GrowthBook Optimizely CMS first choice named as an alternative argued againstblank: not namedEach cell is one answer, GrowthBook on the left and Optimizely CMS on the right.The direct prompt
Optimizely CMS first, GrowthBook not the choice
1 of 14 modelsGrowthBook was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
10 of 14 modelsThe answer made no first choice from these two in this category.Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
GrowthBook7%#5 of 16Optimizely CMS3%#10 of 16GrowthBook8%#3 of 14Optimizely CMS5%#5 of 14Optimizely CMS48%#1 of 13GrowthBook9%#4 of 13What the models said about GrowthBook
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“Best Overall for Product & Technical Teams (Generous Free Tiers) ... GrowthBook (Best Open-Source Option)” Gemini 3.5 Flash · budget prompt · first choice
“Open-source options (like GrowthBook) - no vendor lock-in, full auditability” Kimi K2 · negative prompt · first choice
“GrowthBook if you want to stay completely in your warehouse and self-host.” Muse Glimmer 30B · budget prompt · first choice
What the models said about Optimizely CMS
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“you should exercise significant caution with Optimizely, particularly regarding its cost structure, support quality, and technical performance” Qwen 3.7 Flash · negative prompt · hard negative
“Avoid beginning with Optimizely, Adobe Target, Kameleoon, or AB Tasty unless the company has enterprise-level requirements and budget” Perplexity Sonar · budget prompt · hard negative
“Avoid for Mid-Sized B2B (unless budget is large): Optimizely — median spend is ~$81K/year” DeepSeek V4 Flash · paraphrase prompt · hard negative
“Optimizely is among the most common "default shortlists" for companies seeking rigorous testing, large-scale collaboration, and a mature measurement stack.” Claude Haiku 4.5 · comparative prompt · first choice
“Optimizely is described as an industry-leading experimentation platform that enables businesses to test and optimize digital experiences” Muse Glimmer 30B · comparative prompt · first choice
“Choose Optimizely if you want a large enterprise suite with strong experimentation + personalization + analytics integration.” GPT-5.4 mini · comparative prompt · first choice
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.