Email verification for enterprise buyers
Asked as “email verification service”, and as “email list validation tool”, on behalf of an enterprise B2B company. 45 first choices recorded across the direct, paraphrase, budget and scale prompts, fourteen models each.
Standing · first-choice share
69%
Clear leader
69ZeroBounce07BulkEmailChecker02Apollo.io22others
69% of first choices, clear leader.
Since October 2026▲+19Since October 2026: 50% → 69%, +19 points. Past the 11-point floor: movement.ZeroBounce held the lead, +19 points on 50%, past the 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
ZeroBounce30%Contested↗new leaderNew leader since October 2026: ZeroBounce (30%) replaces Bouncer (27% then, 24% now), 6 points clear, inside the 11-point floor.Standing →Mid-marketZeroBounce47%Clear leader▲+5Since October 2026: 42% → 47%, +5 points. Inside the 11-point floor: within noise.Standing →EnterpriseZeroBounce69%Clear leader▲+19Since October 2026: 50% → 69%, +19 points. Past the 11-point floor: movement.This page
ZeroBounce30%Contested↗new leaderNew leader since October 2026: ZeroBounce (30%) replaces Bouncer (27% then, 24% now), 6 points clear, inside the 11-point floor.Standing →Mid-marketZeroBounce47%Clear leader▲+5Since October 2026: 42% → 47%, +5 points. Inside the 11-point floor: within noise.Standing →EnterpriseZeroBounce69%Clear leader▲+19Since October 2026: 50% → 69%, +19 points. Past the 11-point floor: movement.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 October 2026
01ZeroBounce69%6%66endorsed leader▲+19Since October 2026: 50% → 69%, +19 points. Past the 11-point floor: movement.50% → 69%
ZeroBounce69%6%66endorsed leader▲+19Since October 2026: 50% → 69%, +19 points. Past the 11-point floor: movement.50% → 69%02
NeverBounce2%18%55accepted challenger▼−7Since October 2026: 9% → 2%, −7 points. Inside the 11-point floor: within noise.9% → 2%
NeverBounce2%18%55accepted challenger▼−7Since October 2026: 9% → 2%, −7 points. Inside the 11-point floor: within noise.9% → 2%03
BriteVerify2%9%11accepted challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%
BriteVerify2%9%11accepted challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%04
MillionVerifier2%54%13criticized challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%
MillionVerifier2%54%13criticized challenger▲+2Since October 2026: 0% → 2%, +2 points. Inside the 11-point floor: within noise.0% → 2%Show the five products at 0%, ordered by negative rate
09
Hunter Email Verifier0%27%11criticized challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%
Hunter Email Verifier0%27%11criticized challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%07
Emailable0%10%20accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%
Emailable0%10%20accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%05
Kickbox0%9%45accepted challenger▼−5Since October 2026: 5% → 0%, −5 points. Inside the 11-point floor: within noise.5% → 0%
Kickbox0%9%45accepted challenger▼−5Since October 2026: 5% → 0%, −5 points. Inside the 11-point floor: within noise.5% → 0%06
Bouncer0%0%31accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%
Bouncer0%0%31accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%08
Clearout0%0%10accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.0% → 0%
Clearout0%0%10accepted challenger=heldSince October 2026: 0% → 0%, ±0 points. Inside the 11-point floor: within noise.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 can't be told apart from repeat variation, and both are shown. Each index measures its own floor from its own repeat, over its own categories, so the floor differs from one index to the next. Both editions asked the same fourteen models. 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.
Head to headHead-to-head pages are published for mid-market buyers, so these open on mid-market figures, not enterprise.
All twenty-eight head-to-head pages: the top eight products, each against each
ZeroBounce vs MyEmailVerifierZeroBounce vs EmailableZeroBounce vs NeverBounceZeroBounce vs ClearoutDeBounce vs BouncerDeBounce vs EmailListVerifyDeBounce vs MyEmailVerifierDeBounce vs EmailableDeBounce vs NeverBounceDeBounce vs ClearoutBouncer vs EmailListVerifyBouncer vs MyEmailVerifierBouncer vs EmailableBouncer vs NeverBounceBouncer vs ClearoutEmailListVerify vs MyEmailVerifierEmailListVerify vs EmailableEmailListVerify vs NeverBounceEmailListVerify vs ClearoutMyEmailVerifier vs EmailableMyEmailVerifier vs NeverBounceMyEmailVerifier vs ClearoutEmailable vs NeverBounceEmailable vs ClearoutNeverBounce vs Clearout
One product takes 69% 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
Thirteen of fourteen models held their first choice under the paraphrase. Claude Haiku 4.5 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.
MillionVerifier54%
7 of 13 labels negative · 6 of 14 models · 5 hard negative
“A catch-all benchmark found a high false-positive rate—640 false positives out of 5,000 tested addresses—and 67.7% unresolved results, making it risky” Perplexity Sonar, negative prompt
NeverBounce18%
10 of 55 labels negative · 6 of 14 models · 4 hard negative
“these services generally returned very few definitive results... it makes them poor choices” Perplexity Sonar, negative prompt
Verifications.io
100%
5 of 5 labels negative · 5 of 14 models · 5 hard negative
“Verifications.io is a service that should be avoided due to its history of leaving a MongoDB database publicly accessible online without password protection” Llama 4 Maverick, negative prompt
Kickbox9%
4 of 45 labels negative · 4 of 14 models · 1 hard negative
“Avoid pure pay-as-you-go services (Kickbox, NeverBounce standard plans)” Kimi K2, budget prompt
What they cite
Fourteen of the fourteen models returned a source list in this edition: five return the pages they cited and nine the search results they consulted.
Sites the answers cite
76 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. 865 links across 210 sites, every framing counted. Ranked by the number of answers carrying the site or page. 44 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.
vendor site · Kickbox38 answers · 56 citations · 11 models
vendor site · ZeroBounce37 answers · 95 citations · 12 models
publisher (Gane)31 answers · 31 citations · 10 models
vendor site · Software Advice22 answers · 23 citations · 9 models
vendor site · Hunter20 answers · 20 citations · 11 models
19 answers · 25 citations · 11 models
vendor site · Emailable19 answers · 23 citations · 12 models
18 answers · 27 citations · 10 models
vendor site · Mailercloud12 answers · 12 citations · 6 models
vendor site · Prospeo12 answers · 12 citations · 5 models
vendor site · BillionVerify10 answers · 13 citations · 7 models
vendor site · MailTester9 answers · 34 citations · 8 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.
29 answers · 10 models
22 answers · 9 models
18 answers · 7 models
17 answers · 10 models
16 answers · 9 models
13 answers · 8 models
12 answers · 7 models
12 answers · 6 models
11 answers · 8 models
10 answers · 8 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 | 69% | 250 | 9,900 | 118 | 38,183 | $778 | 120 | 2 |
| BulkEmailChecker bulkemailchecker.com | 7% | 8 | ||||||
| NeverBounce neverbounce.com | 2% | 155 | 8,100 | 64 | 73,301 | 16 | ||
| BriteVerify briteverify.com | 2% | 31 | 720 | 8 | 286 | |||
| Apollo.io apollo.io | 2% | 1010 | 33,100 | 396 | 111,608 | 94 | ||
| BillionVerify billionverify.com | 2% | 5 | ||||||
| BounceZero bouncezero.io | 2% | 2 | ||||||
| Unlimited Verifier unlimitedverifier.com | 2% | 2 | ||||||
| EndBounce | 2% | |||||||
| OneSimpleAPI onesimpleapi.com | 2% | 2 | 5 |
Google's top ten for the two searches hold 16 sites; 5 of them are among the sites the models cited here (emailable.com, hunter.io, mailtester.com, 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 4.5Apollo.ioNeverBounce, ZeroBounceChangedZeroBounceTruelistno first choiceagainst: Emailverifierapp.com, Proofy.io, Xverify
Three alternatives
Bouncer, Listmint, ZeroBounceThree alternatives
Bouncer, Listmint, MillionVerifierFour alternatives
Bouncer, Kickbox, Mailgun, NeverBounceTwo alternatives
BillionVerify, No2BounceGPT-5.4 miniZeroBounceZeroBounceHeldZeroBounceEndBounce, VerifyAnyEmailno first choicenothing named
Three alternatives
Emailable, Hunter Email Verifier, KickboxOne alternative
Experian Email Validation and VerificationFour alternatives
Emailable, Emailvalidation.io, NeverBounce, Validity BriteVerifyOne alternative
ZeroBounceGemini 3.5 FlashZeroBounceZeroBounceHeldZeroBounceBriteVerifyno first choicenothing named
Five alternatives
BounceBan, Bouncer, BriteVerify, Kickbox, NeverBounceThree alternatives
BounceBan, BriteVerify, NeverBounceFive alternatives
Bouncer, BriteVerify, Clearout, Emailable, NeverBounceThree alternatives
Bouncer, NeverBounce, Unlimited VerifierPerplexity SonarZeroBounceZeroBounceHeldZeroBounceOneSimpleAPIagainst: NeverBounce, ZeroBounceno first choiceagainst: Bouncify, DeBounce, EmailListVerify, Emailable, Enrichley, Findymail, Lead Magic, MailerCheck, MillionVerifier, NeverBounce
Four alternatives
Bouncer, Kickbox, NeverBounce, ZoomInfoTwo alternatives
Hunter Email Verifier, KickboxFive alternatives
Bouncer, Emailable, Kickbox, NeverBounce, VerifaliaOne alternative
MillionVerifierGrok 4.20ZeroBounceagainst: MailgunZeroBounceHeldZeroBounceagainst: Emailable, Reoon Email VerifierUnlimited Verifieragainst: EmailListVerify, MillionVerifierno first choiceagainst: BriteVerify, MillionVerifier, NeverBounce, Verifications.io, Xverify
Four alternatives
BriteVerify, Emailable, Hunter Email Verifier, NeverBounceFour alternatives
Bouncer, Kickbox, Melissa Data Quality Suite, NeverBounceFour alternatives
Bouncer, Clearout, Kickbox, NeverBounceThree alternatives
Kickbox, NeverBounce, ZeroBounceMistral SmallZeroBounceZeroBounceHeldZeroBounceBillionVerifyagainst: Kickbox, ZeroBounceno first choiceagainst: EmailVerify.io, MillionVerifier
Three alternatives
Bouncer, Kickbox, NeverBounceTwo alternatives
Kickbox, NeverBounceFour alternatives
BulkEmailChecker, Emailable, Kickbox, NeverBounceDeepSeek V4 FlashZeroBounceagainst: KickboxZeroBounceHeldZeroBounceBulkEmailCheckeragainst: NeverBounceno first choiceagainst: EmailListVerify, MillionVerifier, MyEmailVerifier, NeverBounce, Xverify
One alternative
NeverBounceThree alternatives
Bouncer, Emailable, NeverBounceFive alternatives
Bouncer, BriteVerify, Kickbox, Mailgun Email Verification, NeverBounceTwo alternatives
MillionVerifier, ZeroBounceLlama 4 MaverickZeroBounceZeroBounceHeldZeroBounceZeroBounceno first choiceagainst: DeBounce, Hunter Email Verifier, MillionVerifier, Verifications.io
Three alternatives
Emailable, MillionVerifier, NeverBounceThree alternatives
Bouncer, MillionVerifier, NeverBounceFour alternatives
BriteVerify, Clearout, Hunter Email Verifier, NeverBounceFour alternatives
Clearout, Emailable, Hunter Email Verifier, NeverBounceQwen 3.7 FlashZeroBounceZeroBounceHeldZeroBounceZeroBounceagainst: SES Identity Validationno first choiceagainst: Hunter Email Verifier, NeverBounce, SendGrid, VerifyEmailAddress.org, ZeroBounce, freemailchecker.com
Two alternatives
Kickbox, QuickEmailVerificationTwo alternatives
Hunter Email Verifier, KickboxTwo alternatives
Kickbox, NeverBounceTwo alternatives
Kickbox, NeverBounceKimi K2ZeroBounceZeroBounceHeldBouncer, ZeroBounceagainst: NeverBounceZeroBounceagainst: Kickbox, NeverBounceno first choiceagainst: Hunter Email Verifier, MillionVerifier, NeverBounce, Snov.io
Three alternatives
BounceZero, Emailable, KickboxOne alternative
NeverBounceTwo alternatives
BriteVerify, KickboxThree alternatives
Allegrow Scale Plus Unlimited, EmailQo, MailgoGLM 4.7 FlashXZeroBounceZeroBounceHeldZeroBounceBounceZerono first choiceagainst: Verificati, Verifications.io
Four alternatives
Bouncer, Kickbox, Mailbeam, NeverBounceFour alternatives
EmailVerify.io, Emailable, Kickbox, NeverBounceFour alternatives
Bouncer, Kickbox, Melissa Data, NeverBounceThree alternatives
Kickbox, MailTester, ZeroBounceMiniMax M2.5ZeroBounceZeroBounceHeldClearoutBulkEmailCheckerZeroBounceagainst: DeBounce, Verifications.io
Three alternatives
Bouncer, Kickbox, NeverBounceThree alternatives
Bouncer, Kickbox, NeverBounceOne alternative
ZeroBounceThree alternatives
Clearout, NeverBounce, ZeroBounceTwo alternatives
Emailable, KickboxGPT-6 LunaZeroBounceZeroBounceHeldZeroBounceMillionVerifierno first choiceagainst: Verifications.io
One alternative
Validity BriteVerifyFour alternatives
Bouncer, BriteVerify, Emailable, Validity EngageOne alternative
ZeroBounceMuse Glimmer 30BZeroBounceZeroBounceHeldagainst: NeverBounceZeroBounceBulkEmailCheckeragainst: Kickbox, ZeroBounceno first choicenothing named
Three alternatives
Bouncer, Kickbox, NeverBounceTwo alternatives
Kickbox, Validity BriteVerifySix alternatives
Bouncer, DeBounce, Kickbox, Mailgun Optimize, NeverBounce, SendGrid Validation APITwo alternatives
MyEmailVerifier, NeverBounceBold 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.
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 | 2026-11-01 16:24 | yes | 10 | 8 s |
| Direct recommendation | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 08:41 | yes | 3 | 5 s |
| Direct recommendation | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 14:29 | yes | 13 | 23 s |
| Direct recommendation | Perplexity Sonar | sonar | 2026-11-01 09:44 | yes | 10 | 4 s |
| Direct recommendation | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 16:59 | yes | 5 | 7 s |
| Direct recommendation | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 14:04 | yes | 5 | 4 s |
| Direct recommendation | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 10:52 | yes | 22 | 28 s |
| Direct recommendation | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 15:48 | yes | 5 | 3 s |
| Direct recommendation | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 17:36 | yes | 15 | 33 s |
| Direct recommendation | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 11:30 | yes | 10 | 55 s |
| Direct recommendation | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 12:36 | yes | 15 | 24 s |
| Direct recommendation | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 08:49 | yes | 5 | 26 s |
| Direct recommendation | GPT-6 Luna | gpt-6-luna | 2026-11-01 12:02 | yes | 2 | 24 s |
| Direct recommendation | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 15:27 | yes | 14 | 21 s |
| Paraphrase | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 11:31 | yes | 18 | 8 s |
| Paraphrase | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 14:14 | yes | 3 | 5 s |
| Paraphrase | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 15:57 | no | 0 | 13 s |
| Paraphrase | Perplexity Sonar | sonar | 2026-11-01 14:10 | yes | 10 | 4 s |
| Paraphrase | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 16:13 | yes | 5 | 9 s |
| Paraphrase | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 12:42 | yes | 5 | 3 s |
| Paraphrase | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 10:32 | yes | 23 | 31 s |
| Paraphrase | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 09:17 | yes | 5 | 3 s |
| Paraphrase | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 08:33 | yes | 5 | 20 s |
| Paraphrase | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 08:58 | yes | 10 | 13 s |
| Paraphrase | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 13:03 | yes | 19 | 28 s |
| Paraphrase | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 14:31 | yes | 5 | 15 s |
| Paraphrase | GPT-6 Luna | gpt-6-luna | 2026-11-01 14:32 | yes | 1 | 9 s |
| Paraphrase | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 10:45 | yes | 14 | 17 s |
| Comparative | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 10:24 | yes | 10 | 9 s |
| Comparative | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 09:06 | yes | 9 | 11 s |
| Comparative | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 17:30 | yes | 9 | 28 s |
| Comparative | Perplexity Sonar | sonar | 2026-11-01 14:05 | yes | 10 | 5 s |
| Comparative | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 14:48 | yes | 10 | 14 s |
| Comparative | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 15:03 | yes | 19 | 11 s |
| Comparative | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 14:33 | yes | 21 | 40 s |
| Comparative | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 13:31 | yes | 5 | 3 s |
| Comparative | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 12:03 | yes | 5 | 35 s |
| Comparative | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 10:09 | yes | 19 | 68 s |
| Comparative | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 09:10 | yes | 24 | 131 s |
| Comparative | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 16:37 | yes | 18 | 41 s |
| Comparative | GPT-6 Luna | gpt-6-luna | 2026-11-01 12:28 | yes | 6 | 31 s |
| Comparative | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 09:44 | yes | 14 | 25 s |
| Budget constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 16:29 | yes | 20 | 8 s |
| Budget constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 10:07 | yes | 3 | 4 s |
| Budget constrained | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 17:17 | yes | 2 | 20 s |
| Budget constrained | Perplexity Sonar | sonar | 2026-11-01 16:04 | yes | 10 | 3 s |
| Budget constrained | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 16:23 | yes | 5 | 10 s |
| Budget constrained | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 15:59 | yes | 5 | 4 s |
| Budget constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 13:27 | yes | 22 | 36 s |
| Budget constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 11:21 | yes | 5 | 2 s |
| Budget constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 10:23 | no | 0 | 32 s |
| Budget constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 09:40 | yes | 20 | 62 s |
| Budget constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 14:41 | yes | 22 | 35 s |
| Budget constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 11:02 | yes | 15 | 39 s |
| Budget constrained | GPT-6 Luna | gpt-6-luna | 2026-11-01 15:11 | yes | 2 | 18 s |
| Budget constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 10:37 | yes | 21 | 29 s |
| Scale constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 17:11 | no | 0 | 6 s |
| Scale constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 09:38 | yes | 1 | 7 s |
| Scale constrained | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 12:22 | no | 0 | 20 s |
| Scale constrained | Perplexity Sonar | sonar | 2026-11-01 15:08 | yes | 10 | 9 s |
| Scale constrained | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 15:10 | yes | 9 | 16 s |
| Scale constrained | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 12:39 | no | 0 | 6 s |
| Scale constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 09:52 | yes | 25 | 34 s |
| Scale constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 13:12 | yes | 5 | 5 s |
| Scale constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 09:35 | no | 0 | 30 s |
| Scale constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 17:26 | yes | 10 | 21 s |
| Scale constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 14:16 | yes | 23 | 233 s |
| Scale constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 11:05 | yes | 10 | 27 s |
| Scale constrained | GPT-6 Luna | gpt-6-luna | 2026-11-01 14:23 | yes | 3 | 25 s |
| Scale constrained | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 08:40 | yes | 14 | 32 s |
| Negative framing | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-11-01 14:03 | yes | 18 | 11 s |
| Negative framing | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-11-01 14:07 | yes | 4 | 7 s |
| Negative framing | Gemini 3.5 Flash | gemini-3.6-flash (asked for gemini-3.5-flash; the API answered as this version) | 2026-11-01 08:56 | no | 0 | 21 s |
| Negative framing | Perplexity Sonar | sonar | 2026-11-01 12:13 | yes | 10 | 5 s |
| Negative framing | Grok 4.20 | spacexai/grok-4.20-non-reasoning via xai | 2026-11-01 14:03 | yes | 19 | 19 s |
| Negative framing | Mistral Small | mistral/mistral-small via mistral | 2026-11-01 12:03 | yes | 5 | 4 s |
| Negative framing | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-11-01 17:19 | yes | 25 | 68 s |
| Negative framing | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-11-01 13:24 | yes | 5 | 3 s |
| Negative framing | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-11-01 14:45 | no | 0 | 38 s |
| Negative framing | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-11-01 16:52 | yes | 22 | 42 s |
| Negative framing | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-11-01 14:46 | yes | 23 | 46 s |
| Negative framing | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-11-01 13:51 | yes | 10 | 29 s |
| Negative framing | GPT-6 Luna | gpt-6-luna | 2026-11-01 11:15 | yes | 3 | 25 s |
| Negative framing | Muse Glimmer 30B | meta/muse-glimmer-30b via togetherai | 2026-11-01 13:06 | yes | 23 | 30 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 (hunter.io) read as Hunter Email Verifier
Hunter.io read as Hunter Email Verifier
Mailercloud read as Mailercloud Email Verifier
Reoon read as Reoon Email Verifier
Validity read as Validity BriteVerify
Unresolved, counted raw
Allegrow Scale Plus Unlimited
Email Hippo
EmailQo
Emailvalidation.io
Emailverifierapp.com
EndBounce
Experian Email Validation and Verification
Mailgo
Mailgun Email Verification
No2Bounce
OutPulse
SES Identity Validation
Salesforce
SendGrid Validation API
Verificati
VerifyAnyEmail
freemailchecker.com
Discontinued, still offered
No shut-down product was recommended here.