# Clearout vs Kickbox: which do AI models recommend for email verification, September 2026

GTM AI Recommendation Index, September 2026 Edition, Email verification. Two of twelve models named Clearout first on the direct prompt; one named Kickbox. Page: https://gtm-ai-index.com/gtm-data/email-verification/clearout-vs-kickbox/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Clearout | 6% | #4 of 11 | 3% | 33 | 10 of 12 |
| Kickbox | 4% | #5 of 11 | 0% | 27 | 12 of 12 |

## The direct prompt, model by model

- Llama 4 Maverick: both first (first choices: Clearout, Hunter, Kickbox)
- GLM 4.7 FlashX: clearout first (first choices: Clearout) (alternatives: Hunter, Kickbox)
- Grok 4.1 Fast: neither first, one named (first choices: Hunter, ZeroBounce) (alternatives: Bouncer, Clearout, Kickbox)
- Mistral Small: neither first, one named (first choices: ZeroBounce) (alternatives: Bouncer, Clearout, Hunter, NeverBounce)
- Qwen 3.7 Flash: neither first, one named (first choices: ZeroBounce) (alternatives: Bouncer, EmailListVerify, Kickbox, MillionVerifier)
- Kimi K2: neither first, one named (first choices: ZeroBounce) (alternatives: Bouncer, Clearout, Hunter)
- Claude Haiku 4.5: neither named (first choices: Bouncer, Skrapp) (alternatives: NeverBounce, ZeroBounce)
- GPT-5.4 mini: neither named (first choices: ZeroBounce) (alternatives: Hunter)
- Gemini 3.5 Flash: neither named (first choices: Bouncer) (alternatives: Allegrow, BounceBan, NeverBounce, ZeroBounce)
- Perplexity Sonar: neither named (first choices: Bouncer) (alternatives: Hunter, MillionVerifier, ZeroBounce)
- DeepSeek V4 Flash: neither named (first choices: Bouncer) (alternatives: Hunter, NeverBounce, ZeroBounce)
- MiniMax M2.5: neither named (first choices: ZeroBounce) (alternatives: Hunter)

## What the models said about Clearout

- "Clearout: 94.1% real accuracy" (Kimi K2, negative prompt, soft negative)
- "The best email verification service for a mid-market B2B company is Hunter, Clearout, or Kickbox" (Llama 4 Maverick, direct prompt, first choice)
- "For most mid-market B2B companies, I'd recommend starting with Clearout" (GLM 4.7 FlashX, direct prompt, first choice)
- "would be Hunter, Clearout, or Zerobounce" (Llama 4 Maverick, paraphrase prompt, first choice)

## What the models said about Kickbox

- "The best email verification service for a mid-market B2B company is Hunter, Clearout, or Kickbox" (Llama 4 Maverick, direct prompt, first choice)
- "or Kickbox if you want point-of-entry validation integrated into your existing tech stack." (Claude Haiku 4.5, paraphrase prompt, first choice)
- "include Bouncer, ZeroBounce, Kickbox, and NeverBounce" (Kimi K2, negative 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.