Email verification for enterprise buyers
Asked as “email verification service”, and as “email list validation tool”, on behalf of an enterprise B2B company. 44 first choices recorded across the direct, paraphrase, budget and scale prompts, fourteen models each.
Standing · first-choice share
50%
Clear leader
50ZeroBounce09BulkEmailChecker09NeverBounce32others
50% of first choices, clear leader.
Since September 2026▲+2Since September 2026: 51% → 53%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.ZeroBounce held the lead, +2 points on 51%, inside the 11-point floor.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment; they sit side by side and are never added together.
Small business
Bouncer27%Contested▼−10Since September 2026: 33% → 23%, −10 points. Inside the 11-point floor: within noise. Read over the models both editions asked.Standing →Mid-market
ZeroBounce42%Clear leader▲+12Since September 2026: 29% → 42%, +12 points. Past the 11-point floor: movement. Read over the models both editions asked.Standing →EnterpriseZeroBounce50%Clear leader▲+2Since September 2026: 51% → 53%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.This page
Bouncer27%Contested▼−10Since September 2026: 33% → 23%, −10 points. Inside the 11-point floor: within noise. Read over the models both editions asked.Standing →Mid-marketZeroBounce42%Clear leader▲+12Since September 2026: 29% → 42%, +12 points. Past the 11-point floor: movement. Read over the models both editions asked.Standing →EnterpriseZeroBounce50%Clear leader▲+2Since September 2026: 51% → 53%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.This pageThe standing
Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all fourteen models, for an enterprise B2B company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrantSince September 2026
01ZeroBounce50%6%53endorsed leader▲+2Since September 2026: 51% → 53%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.51% → 53%
ZeroBounce50%6%53endorsed leader▲+2Since September 2026: 51% → 53%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.51% → 53%02
NeverBounce9%7%46accepted challenger▲+2Since September 2026: 6% → 8%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.6% → 8%
NeverBounce9%7%46accepted challenger▲+2Since September 2026: 6% → 8%, +2 points. Inside the 11-point floor: within noise. Read over the models both editions asked.6% → 8%03
Kickbox5%7%44accepted challenger▲+1Since September 2026: 4% → 5%, +1 point. Inside the 11-point floor: within noise. Read over the models both editions asked.4% → 5%
Kickbox5%7%44accepted challenger▲+1Since September 2026: 4% → 5%, +1 point. Inside the 11-point floor: within noise. Read over the models both editions asked.4% → 5%Show the six products at 0%, ordered by negative rate
09
Hunter Email Verifier0%29%17criticized challenger▼−6Since September 2026: 6% → 0%, −6 points. Inside the 11-point floor: within noise. Read over the models both editions asked.6% → 0%
Hunter Email Verifier0%29%17criticized challenger▼−6Since September 2026: 6% → 0%, −6 points. Inside the 11-point floor: within noise. Read over the models both editions asked.6% → 0%08
MillionVerifier0%29%14criticized challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%
MillionVerifier0%29%14criticized challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%07
Clearout0%13%15accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%
Clearout0%13%15accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%05
Emailable0%5%19accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%
Emailable0%5%19accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%04Bouncer0%3%29accepted challenger▼−4Since September 2026: 4% → 0%, −4 points. Inside the 11-point floor: within noise. Read over the models both editions asked.4% → 0%
Bouncer0%3%29accepted challenger▼−4Since September 2026: 4% → 0%, −4 points. Inside the 11-point floor: within noise. Read over the models both editions asked.4% → 0%06
BriteVerify0%0%11accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%
BriteVerify0%0%11accepted challenger=heldSince September 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise. Read over the models both editions asked.0% → 0%The floor is 11 points of share, measured: how far the models move a leader on their own when the same questions are asked twice with nothing changed. A larger change is movement; a smaller one is noise, and both are shown. Movement is read over the twelve models both editions asked; GPT-6 Luna, Muse Glimmer 30B joined this edition and are in the standing but not yet in the comparison. How the floor is measured
Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its product page.
All twenty-one head-to-head pages: the top seven products, each against each
ZeroBounce vs Hunter Email VerifierZeroBounce vs DeBounceZeroBounce vs EmailListVerifyBouncer vs MillionVerifierBouncer vs NeverBounceBouncer vs Hunter Email VerifierBouncer vs DeBounceBouncer vs EmailListVerifyMillionVerifier vs NeverBounceMillionVerifier vs Hunter Email VerifierMillionVerifier vs DeBounceMillionVerifier vs EmailListVerifyNeverBounce vs Hunter Email VerifierNeverBounce vs DeBounceNeverBounce vs EmailListVerifyHunter Email Verifier vs DeBounceHunter Email Verifier vs EmailListVerifyDeBounce vs EmailListVerify
One product takes 50% of first choices here, so the chart would put eight markers in one corner and one at the far edge. The two measurements it plots are columns in the standing above: share, and the negative label rate. Two products carry a negative rate above 25% in this category.
What they warned about
Five of fourteen models held their first choice under the paraphrase. Claude Haiku 4.5, Perplexity Sonar, Mistral Small, Llama 4 Maverick, Qwen 3.7 Flash, Kimi K2, MiniMax M2.5, GPT-6 Luna and Muse Glimmer 30B changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.
Verifications.io
100%
7 of 7 labels negative · 7 of 14 models · 7 hard negative
“In 2019, the email validation service **Verifications.io** left a MongoDB database publicly accessible online without password protection.” Gemini 3.5 Flash, negative prompt
Hunter Email Verifier29%
5 of 17 labels negative · 5 of 14 models · 1 hard negative
“**Avoid using this for cleaning existing legacy databases.**” Qwen 3.7 Flash, negative prompt
DeBounce71%
5 of 7 labels negative · 5 of 14 models
“Popular budget services (such as DeBounce) are often used for small projects but typically lack critical certifications and robust infrastructure required by large enterprises.” Mistral Small, negative prompt
MillionVerifier29%
4 of 14 labels negative · 4 of 14 models · 2 hard negative
“enterprises should avoid it due to: Uncertain billing for unexpected volume spikes.” DeepSeek V4 Flash, negative prompt
What they cite
Citations exist only for the models that return a source list: fourteen of the fourteen in this edition, and all six flagship models on the expanded tier.
Sites the answers cite
77 of 84 answers in this category came back with a source list, from 14 of 14 models: citations where the model returns them, or the search results it consulted. 1061 links across 230 sites, every framing counted. Ranked by the number of answers carrying the site or page. 13 of the 252 answers across every segment cited this index's own page for the category; the method page measures whether that reading tilts an answer.
43 answers · 80 citations · 13 models
vendor site · Kickbox36 answers · 57 citations · 11 models
vendor site · ZeroBounce31 answers · 57 citations · 12 models
vendor site · Hunter26 answers · 31 citations · 12 models
vendor site · BillionVerify26 answers · 29 citations · 9 models
vendor site · ZoomInfo23 answers · 40 citations · 11 models
vendor site · Sender20 answers · 23 citations · 10 models
vendor site · Overloop20 answers · 20 citations · 9 models
vendor site · Prospeo18 answers · 33 citations · 9 models
vendor site · Allegrow18 answers · 20 citations · 11 models
vendor site · ListKit17 answers · 17 citations · 8 models
vendor site · Skrapp17 answers · 17 citations · 10 models
Pages the answers cite
The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.
24 answers · 10 models
22 answers · 11 models
21 answers · 10 models
19 answers · 9 models
17 answers · 8 models
17 answers · 10 models
16 answers · 10 models
15 answers · 7 models
15 answers · 8 models
14 answers · 9 models
Search against answers
Each company's standing in the answers beside its site's footprint in Google search, one row a site: the products the models named on it with their shares, and the share they add up to; monthly searches on Google, and DataForSEO's estimate of AI search demand (modeled from search signals, directional, not a count of queries to any assistant), for the most-searched of the company's and its products' names (the name is in each row's hover text); estimated monthly organic visits to the site; and its best position in Google's top ten for “best email verification service”, “email verification service”. US estimates from DataForSEO and Google's Ads Transparency Center. A small company's site, or a mid-sized company's site for its flagship, is marked company; a product on a large parent's site (Google, Microsoft) has no site figures. A column with no figures for this category is left out, and an empty cell means none were seen, not none exist. Two measurements side by side: neither is read as the cause of the other.
| Company and products | Share | Own site cited | Name searches, Google | AI search demand, est. | Organic visits | Paid search a month, est. | Google ads, last 30 days | Best Google position |
|---|---|---|---|---|---|---|---|---|
| ZeroBounce zerobounce.net | 50% | 203 | 9,900 | 118 | 38,183 | $778 | 120 | 2 |
| NeverBounce neverbounce.com | 9% | 144 | 8,100 | 64 | 73,301 | 16 | ||
| BulkEmailChecker bulkemailchecker.com | 9% | 10 | ||||||
| ZoomInfo zoominfo.com | 9% | 846 | 135,000 | 1,810 | 6,376,738 | $1,140 | 120 | |
| Kickbox kickbox.com | 5% | 103 | 74,000 | 15,514 | 39,936 | 31 | ||
| Truelist truelist.io | 5% | 5 | 7 | |||||
| Allegrow allegrow.co | 2% | 10 | ||||||
| Cleanlist cleanlist.ai | 2% | 99 | 1,900 | 0 | 16,279 | 3 | ||
| Bouncer Shield | 2% | |||||||
| Email List Valid emaillistvalidation.com Email List Valid 2%, Email List Validation 0% | 2% | 2 |
Google's top ten for the two searches hold 16 sites; 3 of them are among the sites the models cited here (hunter.io, usebouncer.com, zerobounce.net). The first result for “best email verification service” is reddit.com.
How they answered
Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.ShowHide
How they answered
Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.
ShowHideModelDirect“What is the best email verification service for an enterprise B2B company?”Paraphrase“Which email list validation tool would you recommend to a large B2B company with thousands of employees?”Comparative“What are the top enterprise-grade email verification services and how do they differ?”Budget-constrained“What is the best email verification service for a large company that needs predictable total cost across thousands of users?”Scale-constrained“We are a 5,000 person company with SSO, SOC 2 and procurement review requirements evaluating an email verification service. What should we look at?”Negative“Which email verification services should a large enterprise avoid or be cautious about?”
Claude Haiku 4.5no first choiceZeroBounceChangedNeverBounceTruelistno first choicenothing named
Two alternatives
NeverBounce, ZoomInfoSix alternatives
Bouncer, BriteVerify, Emailable, Hunter Email Verifier, MailerCheck, ZeroBounceTwo alternatives
EmailVerify, Unlimited VerifierGPT-5.4 miniZeroBounceZeroBounceHeldBriteVerifyZeroBounceno first choiceagainst: EmailListVerify
One alternative
EmailableTwo alternatives
Hunter Email Verifier, Mailgun ValidateFive alternatives
Clearout, Email Hippo, Kickbox, NeverBounce, ZeroBounceGemini 3.5 FlashZeroBounceZeroBounceHeldZeroBounceAllegrowKickboxagainst: Verifications.io
Three alternatives
Allegrow, Bouncer, BriteVerifyThree alternatives
Bouncer, Kickbox, NeverBounceFive alternatives
Bouncer, BriteVerify, Emailable, Kickbox, NeverBounceFive alternatives
BriteVerify, BulkEmailChecker, Kickbox, RevoScale, TombaTwo alternatives
Emailable, ZeroBouncePerplexity SonarZeroBounceZoomInfoChangedKickboxKickboxno first choiceagainst: EmailListVerify, MillionVerifier
Four alternatives
Bouncer, MillionVerifier, NeverBounce, ZoomInfoThree alternatives
Apollo.io, Bouncer, MillionVerifierFive alternatives
Bouncer, BriteVerify, Emailable, NeverBounce, ZeroBounceTwo alternatives
NeverBounce, ZeroBounceGrok 4.1 FastZeroBounceZeroBounceHeldZeroBounceZeroBounceagainst: EmailListVerify, NeverBounceno first choiceagainst: BillionVerify, Clearoutagainst: DeBounce, EmailListVerify, Hunter Email Verifier, MillionVerifier, MyEmailVerifier, Verifications.io
Two alternatives
Kickbox, NeverBounceTwo alternatives
Kickbox, NeverBounceFour alternatives
Bouncer, Emailable, Kickbox, NeverBounceThree alternatives
Bouncer, Emailable, KickboxFour alternatives
Bouncer, Emailable, Kickbox, ZeroBounceMistral SmallZeroBounceZoomInfoChangedZeroBounceEmail List Validno first choiceagainst: DeBounce, MillionVerifier
Two alternatives
Hunter Email Verifier, NeverBounceFour alternatives
Bouncer, Clearout, Kickbox, MillionVerifierDeepSeek V4 FlashZeroBounceZeroBounceHeldZeroBounceBulkEmailCheckeragainst: Hunter Email Verifier, Kickbox, ZeroBounceno first choiceagainst: AeroLeads, FindThatLead, MillionVerifier, Snov.io, Verifications.io
Three alternatives
Bouncer, Kickbox, NeverBounceFour alternatives
Bouncer, Kickbox, NeverBounce, Validity BriteVerifySix alternatives
Bouncer, Clearout, Emailable, Kickbox, MillionVerifier, NeverBounceThree alternatives
MillionVerifier, NeverBounce, TruelistLlama 4 Maverickno first choiceZoomInfoChangedno first choiceNeverBounceno first choiceagainst: Bouncer, Clearout, DeBounce, EmailListVerify, Emailable, Enrichley, Findymail, Hunter Email Verifier, Kickbox, Lead Magic, MailerCheck, NeverBounce, Validity's BriteVerify, ZeroBounce
One alternative
CleanlistQwen 3.7 FlashNeverBounceZeroBounceChangedZeroBounceTruelistno first choiceagainst: Hunter Email Verifier, NeverBounce, VerifyEmail.org, ZeroBounce
Two alternatives
MillionVerifier, PipelineThree alternatives
Hunter Email Verifier, Kickbox, NeverBounceTwo alternatives
Kickbox, NeverBounceThree alternatives
MillionVerifier, NeverBounce, ZeroBounceKimi K2ZeroBounceNeverBounce, ZeroBounceChangedZeroBounceBulkEmailCheckerno first choiceagainst: Verification.io
Three alternatives
Allegrow, Kickbox, NeverBounceFour alternatives
Emailable, Kickbox, MillionVerifier, NeverBounceTwo alternatives
NeverBounce, TruelistFour alternatives
Allegrow, Emailable, Kickbox, ZeroBounceGLM 4.7 FlashXZeroBounceZeroBounceHeldZeroBounceagainst: Hunter Email VerifierZeroBounceagainst: DeBounce, Kickboxno first choiceagainst: Verifications.io
Four alternatives
Bouncer, Kickbox, NeverBounce, Snov.ioThree alternatives
Bouncer, Clearout, KickboxFive alternatives
Bouncer, Clearout, Emailable, Kickbox, NeverBounceTwo alternatives
BulkEmailChecker, NeverBounceMiniMax M2.5ListKit Sales Intelligence, ZeroBounceCleanlist, ZoomInfoChangedZeroBounceBulkEmailCheckerno first choiceagainst: Verifications.io
Three alternatives
Bouncer, Emailable, KickboxOne alternative
KickboxFour alternatives
Clearout, Kickbox, NeverBounce, Validity BriteVerifyThree alternatives
Instantly, NeverBounce, SmartleadGPT-6 LunaZeroBounceValidity's contact-data-quality offering, powered by BriteVerifyChangedZeroBounceBouncer Shieldno first choiceagainst: Verifications.io
One alternative
BriteVerifyOne alternative
ZeroBounceFour alternatives
Emailable, Kickbox, NeverBounce, Validity BriteVerifyMuse Glimmer 30BZeroBounceNeverBounceChangedValidity BriteVerify, ZeroBounceBulkEmailCheckerno first choiceagainst: DeBounce, Verifications.io
Three alternatives
Bouncer, Kickbox, NeverBounceOne alternative
Hunter Email VerifierThree alternatives
Kickbox, MillionVerifier, NeverBounceThree alternatives
NeverBounce, Truelist, ZeroBounceBold is the first choiceAlternatives are counted; the count opens them.What the answer argued against
The record
One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency. Full answer text is in the free responses file. Download the record
Eighty-four rows: every prompt, every model, every answer.
| Prompt | Model | Version string | Time (UTC) | Searched | Sources | Latency |
|---|---|---|---|---|---|---|
| Direct recommendation | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 09:10 | no | 0 | 5 s |
| Direct recommendation | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 13:16 | yes | 2 | 6 s |
| Direct recommendation | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 12:49 | yes | 17 | 26 s |
| Direct recommendation | Perplexity Sonar | sonar | 2026-10-01 11:10 | yes | 20 | 3 s |
| Direct recommendation | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 13:26 | yes | 23 | 9 s |
| Direct recommendation | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 12:04 | yes | 5 | 4 s |
| Direct recommendation | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 11:39 | yes | 23 | 24 s |
| Direct recommendation | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 09:14 | yes | 9 | 5 s |
| Direct recommendation | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 08:40 | yes | 5 | 31 s |
| Direct recommendation | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 12:09 | yes | 18 | 23 s |
| Direct recommendation | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 13:27 | yes | 23 | 227 s |
| Direct recommendation | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 14:01 | yes | 7 | 25 s |
| Direct recommendation | GPT-6 Luna | gpt-6-luna | 2026-10-01 14:01 | yes | 2 | 19 s |
| Direct recommendation | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 09:18 | yes | 15 | 19 s |
| Paraphrase | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 10:00 | yes | 9 | 9 s |
| Paraphrase | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 08:27 | yes | 3 | 4 s |
| Paraphrase | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 13:18 | yes | 10 | 22 s |
| Paraphrase | Perplexity Sonar | sonar | 2026-10-01 08:32 | yes | 20 | 4 s |
| Paraphrase | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 08:54 | yes | 23 | 8 s |
| Paraphrase | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 10:24 | yes | 5 | 3 s |
| Paraphrase | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 12:34 | yes | 24 | 21 s |
| Paraphrase | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 11:43 | yes | 5 | 2 s |
| Paraphrase | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 11:03 | no | 0 | 34 s |
| Paraphrase | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 10:50 | yes | 10 | 21 s |
| Paraphrase | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 08:51 | yes | 15 | 57 s |
| Paraphrase | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 08:47 | yes | 10 | 26 s |
| Paraphrase | GPT-6 Luna | gpt-6-luna | 2026-10-01 10:41 | yes | 2 | 15 s |
| Paraphrase | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 11:01 | yes | 24 | 29 s |
| Comparative | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 08:56 | yes | 10 | 8 s |
| Comparative | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 07:38 | yes | 4 | 7 s |
| Comparative | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 09:14 | yes | 18 | 27 s |
| Comparative | Perplexity Sonar | sonar | 2026-10-01 13:51 | yes | 20 | 7 s |
| Comparative | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 08:47 | yes | 24 | 8 s |
| Comparative | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 11:57 | yes | 15 | 8 s |
| Comparative | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 08:53 | yes | 23 | 41 s |
| Comparative | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 09:56 | yes | 5 | 1 s |
| Comparative | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 11:29 | yes | 9 | 30 s |
| Comparative | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 08:45 | yes | 23 | 35 s |
| Comparative | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 13:29 | yes | 24 | 105 s |
| Comparative | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 11:40 | yes | 5 | 16 s |
| Comparative | GPT-6 Luna | gpt-6-luna | 2026-10-01 10:09 | yes | 7 | 40 s |
| Comparative | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 08:51 | yes | 23 | 58 s |
| Budget constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 10:47 | yes | 9 | 7 s |
| Budget constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 10:56 | yes | 2 | 4 s |
| Budget constrained | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 09:26 | yes | 13 | 25 s |
| Budget constrained | Perplexity Sonar | sonar | 2026-10-01 12:51 | yes | 19 | 5 s |
| Budget constrained | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 07:44 | yes | 22 | 9 s |
| Budget constrained | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 12:44 | yes | 10 | 4 s |
| Budget constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 07:49 | yes | 24 | 27 s |
| Budget constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 07:51 | yes | 5 | 1 s |
| Budget constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 10:55 | yes | 14 | 47 s |
| Budget constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 09:44 | yes | 18 | 27 s |
| Budget constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 12:15 | yes | 25 | 151 s |
| Budget constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 12:25 | yes | 22 | 52 s |
| Budget constrained | GPT-6 Luna | gpt-6-luna | 2026-10-01 14:02 | yes | 1 | 21 s |
| Budget constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 13:18 | yes | 13 | 21 s |
| Scale constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 11:16 | no | 0 | 5 s |
| Scale constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 10:39 | yes | 2 | 7 s |
| Scale constrained | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 10:05 | yes | 13 | 22 s |
| Scale constrained | Perplexity Sonar | sonar | 2026-10-01 10:20 | yes | 20 | 5 s |
| Scale constrained | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 09:14 | yes | 14 | 8 s |
| Scale constrained | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 12:51 | no | 0 | 8 s |
| Scale constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 08:56 | yes | 22 | 43 s |
| Scale constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 09:22 | yes | 5 | 2 s |
| Scale constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 12:14 | no | 0 | 34 s |
| Scale constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 12:18 | yes | 15 | 38 s |
| Scale constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 11:49 | yes | 16 | 26 s |
| Scale constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 13:54 | no | 0 | 53 s |
| Scale constrained | GPT-6 Luna | gpt-6-luna | 2026-10-01 08:34 | yes | 4 | 23 s |
| Scale constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 11:10 | yes | 12 | 19 s |
| Negative framing | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 12:33 | yes | 18 | 7 s |
| Negative framing | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 08:08 | yes | 5 | 8 s |
| Negative framing | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 13:50 | yes | 26 | 31 s |
| Negative framing | Perplexity Sonar | sonar | 2026-10-01 08:31 | yes | 18 | 4 s |
| Negative framing | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 09:03 | yes | 23 | 17 s |
| Negative framing | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 08:23 | yes | 5 | 4 s |
| Negative framing | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 12:16 | yes | 22 | 52 s |
| Negative framing | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 09:57 | yes | 5 | 2 s |
| Negative framing | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 10:29 | no | 0 | 36 s |
| Negative framing | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 10:19 | yes | 24 | 21 s |
| Negative framing | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 11:45 | yes | 18 | 72 s |
| Negative framing | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 08:08 | yes | 15 | 26 s |
| Negative framing | GPT-6 Luna | gpt-6-luna | 2026-10-01 08:28 | yes | 2 | 23 s |
| Negative framing | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-10-01 12:35 | yes | 21 | 27 s |
Normalization in this category
Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.
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Category-scoped readings
Bulk Email Checker read as BulkEmailChecker
Hunter read as Hunter Email Verifier
Hunter.io read as Hunter Email Verifier
Unresolved, counted raw
AeroLeads
Bouncer Shield
Bouncezero
Email Hippo
Email List Valid
EmailVerify
FindThatLead
ListKit Sales Intelligence
Releem
RevoScale
RevoScale's Unlimited Email Finder
Validity's contact-data-quality offering, powered by BriteVerify
Verification.io
Discontinued, still offered
No shut-down product was recommended here.