Experimentation and personalization · November 2026 Edition
Optimizely CMS vs PostHog
One of fourteen models named Optimizely CMS first on the direct prompt; zero named PostHog. Optimizely CMS was named by fourteen of the fourteen models and PostHog by twelve and Optimizely CMS carries 61 labels and PostHog 21, so the shares are not directly comparable.
By Optimizely, San Francisco, United States, founded 2010. Named in six categories this edition.
Named in nine categories this edition.
First-choice share5%3%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate46%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#5#6A position in a field of 14; printed, not drawn.
Labels6121A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Optimizely CMS reading right to left. Rank and label count are printed, not drawn.VWO was named alongside these two in thirteen of the fourteen direct answers. VWO vs Optimizely CMS · VWO vs PostHog · Convert Experiences vs Optimizely CMS
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
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Optimizely CMSFirst choices, of fourteen modelsPostHog
Direct106 against Optimizely CMS
Paraphrase104 against Optimizely CMS
Comparative90
Budget-constrained026 against Optimizely CMS
Scale-constrained102 against Optimizely CMS
Negative0010 against Optimizely CMS
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Optimizely CMS and PostHog stood in it.
| 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 | | | | | |
Optimizely CMS PostHog first choice named as an alternative argued againstblank: not namedEach cell is one answer, Optimizely CMS on the left and PostHog on the right.The direct prompt
The plain question, one answer per model, grouped by where Optimizely CMS and PostHog stood in it.
Optimizely CMS first, PostHog not the choice
1 of 14 modelsPostHog was named in the answer but not as the choice, or not at all.GPT-5.4 miniOptimizely CMS alternatives: Adobe Target, Dynamic Yield, VWO
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.Mistral SmallHubSpot Content Hub alternatives: Optimizely CMS, Personyze, VWO
GLM 4.7 FlashXPersonyze alternatives: HubSpot Content Hub, Optimizely CMS, Right Message, VWO
Muse Glimmer 30BVWO alternatives: Convert Experiences, Mutiny, Optimizely CMS, Personyze
Neither was named
10 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5VWO alternatives: Mutiny, Personyze
Gemini 3.5 FlashVWO alternatives: AB Tasty, HubSpot Marketing Hub, Kameleoon
Perplexity SonarHubSpot Content Hub alternatives: Abmatic AI, Croct, Mutiny, VWO, Webflow Optimize
Grok 4.20Croct alternatives: AB Tasty, Kameleoon, VWO
DeepSeek V4 FlashConvert Experiences, VWO alternatives: Mutiny, Personyze
Llama 4 MaverickHubSpot Content Hub
Qwen 3.7 FlashVWO alternatives: Convert Experiences, Mutiny
Kimi K2VWO alternatives: Mutiny, Personyze
MiniMax M2.5Personyze alternatives: Convert Experiences, VWO
GPT-6 LunaVWO alternatives: AB Tasty
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
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
PostHog leads by two points.
PostHog5%#7 of 16Optimizely CMS3%#10 of 16Mid-marketThe figures above
The order flips: Optimizely CMS leads at mid-market.
Optimizely CMS5%#5 of 14PostHog3%#6 of 14Enterprise
Optimizely CMS leads by forty-eight points.
Optimizely CMS48%#1 of 13PostHog0%#– of 13What 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
What the models said about PostHog
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“Developer-led, zero cost to start: PostHog or GrowthBook. PostHog if you want analytics + experiments in one UI” Muse Glimmer 30B · budget prompt · first choice
Also compared
VWO vs Optimizely CMSVWO vs PostHogConvert Experiences vs Optimizely CMSConvert Experiences vs PostHogGrowthBook vs Optimizely CMSGrowthBook vs PostHogPersonyze vs Optimizely CMSPersonyze vs PostHogOptimizely CMS vs AB TastyOptimizely CMS vs MutinyPostHog vs AB TastyPostHog vs MutinyAll twenty-eight head-to-head pages and the full experimentation standing
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.