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

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

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| ZeroBounce | 29% | #1 of 11 | 8% | 53 | 12 of 12 |
| Kickbox | 4% | #5 of 11 | 0% | 27 | 12 of 12 |

## The direct prompt, model by model

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

## What the models said about ZeroBounce

- "Several providers (ZeroBounce, NeverBounce, Bouncer's monthly credits) expire credits, which punishes infrequent users" (DeepSeek V4 Flash, budget prompt, soft negative)
- "Be Cautious About: Overpriced "Legacy" Providers... ZeroBounce charges up to $129 per 10,000 verifications" (Gemini 3.5 Flash, negative prompt, soft negative)
- "premium enterprise tools like ZeroBounce charge ~$129 for 10,000 verifications" (Gemini 3.5 Flash, budget prompt, soft negative)
- "Well-regarded alternatives with stronger track records in recent independent testing include Bouncer, ZeroBounce, Kickbox, and NeverBounce" (Kimi K2, negative prompt, first choice)
- "ZeroBounce (Best overall balance for mid-market) ... ZeroBounce for robust list hygiene + extras (top G2 pick for mid-market)" (Grok 4.1 Fast, direct prompt, first choice)
- "ZeroBounce — Best Overall for Mid-Market ... Choose ZeroBounce if you want the safest bet with proven mid-market fit" (Kimi K2, direct 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.