# Experimentation and personalization: what AI models recommend, September 2026

GTM AI Recommendation Index, September 2026 Edition. Asked as "website experimentation and personalization platform" and as "A/B testing and personalization tool", six framings each, to twelve models with search on, on behalf of a mid-market B2B company. Page: https://gtm-ai-index.com/marketing/experimentation-and-personalization/

**Standing:** VWO leads with 34% of first choices; verdict contested. 53 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | VWO | 34% | 18% | 55 |
| 2 | Mida | 11% | 0% | 11 |
| 3 | Convert | 8% | 0% | 17 |
| 4 | Convert Experiences | 8% | 0% | 11 |
| 5 | Optimizely CMS | 8% | 51% | 47 |
| 6 | Kameleoon | 4% | 4% | 27 |
| 7 | Statsig | 4% | 14% | 21 |
| 8 | GrowthBook | 2% | 4% | 26 |
| 9 | AB Tasty | 2% | 17% | 30 |
| 10 | Mutiny | 2% | 29% | 21 |
| 11 | PostHog | 0% | 8% | 12 |
| 12 | Dynamic Yield | 0% | 25% | 20 |

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Mutiny; alternatives AB Tasty, Abmatic AI, Mida, VWO
- GPT-5.4 mini: Optimizely CMS; alternatives Kameleoon, VWO
- Gemini 3.5 Flash: VWO; alternatives Abmatic AI, Markettailor, Userled, Webflow Optimize
- Perplexity Sonar: VWO; alternatives Convert, Mutiny
- Grok 4.1 Fast: VWO; alternatives Convert Experiences, Kameleoon, Personyze
- Mistral Small: Personyze; alternatives Abmatic AI, VWO
- DeepSeek V4 Flash: VWO; alternatives Convert Experiences, Kameleoon, Mutiny
- Llama 4 Maverick: Personizely, Personyze, VWO
- Qwen 3.7 Flash: Kameleoon, VWO; alternatives Mutiny, Personizely
- Kimi K2: VWO; alternatives Intellimize, Mutiny
- GLM 4.7 FlashX: Convert Experiences; alternatives Kameleoon, VWO
- MiniMax M2.5: Personizely, Personyze; alternatives Convert

## Sources the answers cite

20 of 72 answers came back with a source list, from 4 of 12 models. Sites named in the most answers:

- vwo.com: 9 answers, 12 citations
- convert.com: 5 answers, 7 citations
- kameleoon.com: 5 answers, 6 citations
- gartner.com: 5 answers, 5 citations
- mida.so: 5 answers, 5 citations
- qualaroo.com: 5 answers, 5 citations
- growthbook.io: 4 answers, 8 citations
- amplitude.com: 4 answers, 5 citations

Pages named in the most answers:

- https://qualaroo.com/blog/best-ab-testing-tools (5 answers)
- https://vwo.com/blog/experimentation-platform-guide (5 answers)
- https://convert.com/blog/a-b-testing/ab-testing-tools-for-growth-teams (4 answers)
- https://kameleoon.com/blog/best-ab-testing-tools (4 answers)
- https://learn.g2.com/best-a-b-testing-tools (4 answers)
- https://optibase.io/best-ab-testing-platforms (4 answers)
- https://cxl.com/blog/ab-testing-tools (3 answers)
- https://gartner.com/reviews/market/a-b-testing-tools (3 answers)
- https://growthbook.io/insights/best-ai-experimentation-platforms (3 answers)
- https://guideflow.com/blog/best-personalization-software (3 answers)

## Warned against

- Optimizely CMS: 24 of 47 labels negative. "Major Structural / Commercial Red Flags ... Optimizely ... Extreme pricing opacity ... Security incidents" (Kimi K2, negative prompt)
- VWO: 10 of 55 labels negative. "Data Tracking Problems ... could potentially undermine trust in the platform's results" (Mistral Small, negative prompt)
- Adobe Target: 13 of 31 labels negative. "What to Avoid ... Enterprise-only pricing typically starting at $3,000–$36,000+/year" (Kimi K2, budget prompt)
- AB Tasty: 5 of 30 labels negative. "What to Avoid (Not Budget-Friendly) - AB Tasty: Typically $700-2,500/month" (MiniMax M2.5, budget prompt)

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, September 2026 Edition, gtm-ai-index.com.