# Convert vs Optimizely CMS: which do AI models recommend for experimentation, September 2026

GTM AI Recommendation Index, September 2026 Edition, Experimentation and personalization. Zero of twelve models named Convert first on the direct prompt; one named Optimizely CMS. Page: https://gtm-ai-index.com/marketing/experimentation-and-personalization/convert-vs-optimizely-cms/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Convert | 8% | #3 of 14 | 0% | 17 | 10 of 12 |
| Optimizely CMS | 8% | #5 of 14 | 51% | 47 | 12 of 12 |

## The direct prompt, model by model

- GPT-5.4 mini: optimizely cms first (first choices: Optimizely CMS) (alternatives: Kameleoon, VWO)
- Perplexity Sonar: neither first, one named (first choices: VWO) (alternatives: Convert, Mutiny)
- MiniMax M2.5: neither first, one named (first choices: Personizely, Personyze) (alternatives: Convert)
- Claude Haiku 4.5: neither named (first choices: Mutiny) (alternatives: AB Tasty, Abmatic AI, Mida, VWO)
- Gemini 3.5 Flash: neither named (first choices: VWO) (alternatives: Abmatic AI, Markettailor, Userled, Webflow Optimize)
- Grok 4.1 Fast: neither named (first choices: VWO) (alternatives: Convert Experiences, Kameleoon, Personyze)
- Mistral Small: neither named (first choices: Personyze) (alternatives: Abmatic AI, VWO)
- DeepSeek V4 Flash: neither named (first choices: VWO) (alternatives: Convert Experiences, Kameleoon, Mutiny)
- Llama 4 Maverick: neither named (first choices: Personizely, Personyze, VWO)
- Qwen 3.7 Flash: neither named (first choices: Kameleoon, VWO) (alternatives: Mutiny, Personizely)
- Kimi K2: neither named (first choices: VWO) (alternatives: Intellimize, Mutiny)
- GLM 4.7 FlashX: neither named (first choices: Convert Experiences) (alternatives: Kameleoon, VWO)

## What the models said about Convert

- "I would recommend Convert.com if you want a strong balance of reliability, privacy, and straightforward pricing" (Perplexity Sonar, paraphrase prompt, first choice)
- "I would recommend Convert.com as the best A/B testing and personalization tool for a mid-sized B2B company" (Llama 4 Maverick, paraphrase prompt, first choice)
- "Privacy-first (excellent GDPR), affordable (~$299+/month), up to 50 goals/test." (Grok 4.1 Fast, negative prompt, first choice)

## What the models said about Optimizely CMS

- "Major Structural / Commercial Red Flags ... Optimizely ... Extreme pricing opacity ... Security incidents" (Kimi K2, negative prompt, hard negative)
- "High Cost, Declining Support, Rigid Platform... Be very cautious | Optimizely (for SMB/mid-market)" (DeepSeek V4 Flash, negative prompt, hard negative)
- "Platforms to Avoid or Be Very Cautious About ... 1. Optimizely (Now part of Episerver)" (Mistral Small, negative prompt, hard negative)
- "Deepest experimentation infrastructure - considered the enterprise standard for A/B testing... The most mature experimentation platform" (Mistral Small, comparative prompt, first choice)
- "The category reference point for statistical rigor... Choose Optimizely if: You need the most rigorous experimentation program" (Kimi K2, comparative prompt, first choice)
- "Optimizely — best-in-class statistical rigor + feature experimentation; needs some engineering support; enterprise pricing" (DeepSeek V4 Flash, scale prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.