# DeBounce vs NeverBounce: which do AI models recommend for email verification, September 2026

GTM AI Recommendation Index, September 2026 Edition, Email verification. Zero of twelve models named DeBounce first on the direct prompt; zero named NeverBounce. Page: https://gtm-ai-index.com/gtm-data/email-verification/debounce-vs-neverbounce/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| DeBounce | 4% | #7 of 11 | 12% | 17 | 9 of 12 |
| NeverBounce | 2% | #8 of 11 | 8% | 39 | 12 of 12 |

## The direct prompt, model by model

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

## What the models said about DeBounce

- "Best for: Cost-sensitive users (accuracy may vary)" (Mistral Small, comparative prompt, soft negative)
- "DeBounce: 94.0% real accuracy" (Kimi K2, negative prompt, soft negative)
- "For most businesses, DeBounce or MyEmailVerifier offer the best balance of cost, accuracy, and features." (MiniMax M2.5, budget prompt, first choice)
- "DeBounce – Best Overall Value ... one of the cheapest rates available" (Kimi K2, budget prompt, first choice)
- "DeBounce — Best for Bulk List Cleaning ... aggressive bulk pricing while maintaining industry-standard accuracy" (Qwen 3.7 Flash, budget prompt, alternative)

## What the models said about NeverBounce

- "Verdict: Avoid for critical campaigns due to reliability and support issues" (Mistral Small, negative prompt, hard negative)
- "NeverBounce charges for unknowns... NeverBounce slowest (~200 min for 10K)" (DeepSeek V4 Flash, comparative prompt, soft negative)
- "include Bouncer, ZeroBounce, Kickbox, and NeverBounce" (Kimi K2, negative prompt, first choice)
- "NeverBounce is the strongest pick for bulk list hygiene at scale." (Claude Haiku 4.5, paraphrase prompt, first choice)
- "NeverBounce (Subscription Model) — Best Predictable Micro-Budget ... Starts at $10/month for 1,000 verifications." (Qwen 3.7 Flash, budget prompt, alternative)

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.