Background screening for small business buyers
Asked as “background check provider”, and as “employment screening service”, on behalf of a small B2B company. 49 first choices recorded across the direct, paraphrase, budget and scale prompts, twelve models each.
Standing · first-choice share
41%
Clear leader
41GoodHire31Checkr12BackgroundChecks.com16others
41% of first choices, clear leader.
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.
The standing
Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all twelve models, for a small B2B company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrant
Show the four products at 0%, ordered by negative rate
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 fifteen head-to-head pages: the top six products, each against each
Checkr vs Verified FirstCheckr vs Accurate BackgroundGoodHire vs CertnGoodHire vs BackgroundChecks.comGoodHire vs Verified FirstGoodHire vs Accurate BackgroundCertn vs BackgroundChecks.comCertn vs Verified FirstCertn vs Accurate BackgroundBackgroundChecks.com vs Verified FirstBackgroundChecks.com vs Accurate BackgroundVerified First vs Accurate Background
Recommended versus criticized
Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.
Criticized challengerCriticized default
Negative label rate →
01
02
03
04
05
06
07
08Accepted challengerEndorsed leader
0%First-choice share → · lines at 30% share and 25% negative60%
Key
01GoodHire41%
GoodHire41%02Checkr31%
Checkr31%03BackgroundChecks.com12%
BackgroundChecks.com12%04Certn6%
Certn6%05Accurate Background0%
Accurate Background0%06First Advantage0%
First Advantage0%07Sterling0%
Sterling0%08HireRight0%
HireRight0%What they warned about
Six of twelve models held their first choice under the paraphrase. Claude Haiku 4.5, Gemini 3.5 Flash, Grok 4.1 Fast, Llama 4 Maverick, Kimi K2 and GLM 4.7 FlashX 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.
HireRight65%
13 of 20 labels negative · 10 of 12 models · 6 hard negative
“Be especially cautious with **HireRight** and **First Advantage** given their documented accuracy and customer service failures.” DeepSeek V4 Flash, negative prompt
Sterling62%
10 of 16 labels negative · 8 of 12 models · 2 hard negative
“**Sterling Infosystems** – False warrants, accuracy issues” GLM 4.7 FlashX, negative prompt
TruthFinder
100%
9 of 9 labels negative · 7 of 12 models · 9 hard negative
“The FTC has taken action against **TruthFinder** and **Instant Checkmate** for deceiving users about report accuracy and violating the FCRA” GPT-5.4 mini, negative prompt
Instant Checkmate100%
7 of 7 labels negative · 7 of 12 models · 7 hard negative
“FTC has taken action against **TruthFinder** and **Instant Checkmate** ... that's a red flag for hiring use” GPT-5.4 mini, negative prompt
What they cite
Citations exist only for the models that return a source list: fourteen of the twelve 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 12 models: citations where the model returns them, or the search results it consulted. 988 links across 179 sites, every framing counted. Ranked by the number of answers carrying the site or page.
vendor site · Checkr58 answers · 76 citations · 14 models
vendor site · GoodHire37 answers · 53 citations · 13 models
vendor site · Pin31 answers · 31 citations · 10 models
29 answers · 34 citations · 12 models
vendor site · GCheck27 answers · 32 citations · 10 models
vendor site · Mitratech27 answers · 31 citations · 11 models
27 answers · 27 citations · 11 models
23 answers · 28 citations · 9 models
19 answers · 19 citations · 10 models
vendor site · G218 answers · 25 citations · 10 models
18 answers · 18 citations · 9 models
18 answers · 18 citations · 9 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.
40 answers · 12 models
31 answers · 10 models
27 answers · 11 models
23 answers · 10 models
22 answers · 9 models
20 answers · 11 models
18 answers · 9 models
18 answers · 7 models
18 answers · 9 models
18 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 “background check provider”, “background check providers”, “best background check provider”. 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 |
|---|---|---|---|---|---|---|---|---|
| GoodHire goodhire.com | 41% | 101 | 2,400 | 45 | 219,964 | 40 | 1 | |
| Checkr checkr.com | 31% | 158 | 74,000 | 1,214 | 498,605 | $77,362 | 85 | 4 |
| BackgroundChecks.com backgroundchecks.com | 12% | 60 | 1,600 | 26 | 250,895 | $5,146 | 18 | |
| Certn certn.co | 6% | 68 | 1,900 | 42 | 3,223 | $37 | 8 | |
| ShareAble shareable.com ShareAble for Hires 4% | 4% | 8 | 40 | 0 | 1,342 | |||
| Verified Credentials verifiedcredentials.com | 4% | 3 | ||||||
| Zinc | 2% | |||||||
| Verified First verifiedfirst.com | 0% | 32 | 4,400 | 255 | 11,301 | 11 | 9 | |
| HireShield hireshield.com | 0% | 14 | 90 | 0 | 8,493 | |||
| Accurate accurate.com Accurate Background 0% | 0% | 88 | 8,100 | 561 | 161,894 company | $271 | 7 | 1 |
Google's top ten for the three searches hold 21 sites; 3 of them are among the sites the models cited here (checkr.com, goodhire.com, money.com). The first result for “background check provider” is accurate.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 background check provider for a small B2B company?”Paraphrase“Which employment screening service would you recommend to a small business that sells to other businesses?”Comparative“What are the top background check providers for a small team and how do they differ?”Budget-constrained“What is the best background check provider for a small company with a tight budget?”Scale-constrained“We are a 30 person company evaluating a background check provider. What should we look at?”Negative“Which background check providers should a small business avoid or be cautious about?”
Claude Haiku 4.5GoodHireno first choiceChangedCheckrGoodHireno first choicenothing named
Three alternatives
BackgroundChecks.com, Checkr, Verified FirstThree alternatives
Accurate Background, Certn, First AdvantageFour alternatives
BackgroundChecks.com, HireShield, Verified First, VettyGPT-5.4 miniCheckrCheckrHeldCheckrBackgroundChecks.comno first choiceagainst: Instant Checkmate, TruthFinder
Three alternatives
ADP RUN, Atlantic Employee Screening, BackgroundChecks.comOne alternative
GoodHireTwo alternatives
Accurate Background, GoodHireOne alternative
CheckrGemini 3.5 FlashGoodHireagainst: BeenVerified, TruthFinderCheckrChangedCheckragainst: TransUnion's ShareAble for HiresShareAble for Hiresagainst: BeenVerified, TruthFinderCheckragainst: BeenVerified, First Advantage, HireRight, Instant Checkmate, Intelius, Spokeo, Sterling, TruthFinder, Whitepages
Four alternatives
Bchex, Certn, HireShield, Verified FirstThree alternatives
ScoutLogic, ShareAble for Hires, VettyFour alternatives
BackgroundChecks.com, Certn, KarmaCheck, Verified FirstFour alternatives
GCheck, GoodHire, HireShield, Verified CredentialsThree alternatives
KarmaCheck, Verified First, VettyPerplexity SonarGoodHireGoodHireHeldBackgroundChecks.comagainst: Accurate Background, First Advantage, GoodEgg/Foley, HireRightCheckrno first choicenothing named
Four alternatives
BackgroundChecks.com, Certn, Checkr, Mitratech AssureHireThree alternatives
Certn, ClearChecks, HireRightFour alternatives
Certn, Checkr, GoodHire, Mitratech AssureHireTwo alternatives
Certn, GoodHireGrok 4.1 FastCheckr, GoodHireagainst: HireRightGoodHireChangedCheckragainst: HireRightBackgroundChecks.comno first choiceagainst: BackgroundChecks.com, Checkr, First Advantage, HireRight
Two alternatives
BackgroundChecks.com, GCheckThree alternatives
BackgroundChecks.com, Checkr, ShareAble for HiresThree alternatives
BackgroundChecks.com, Certn, GoodHireThree alternatives
Accurate Background, Checkr, GoodHireMistral SmallGoodHireGoodHireHeldBackgroundChecks.comCheckrno first choiceagainst: BeenVerified, Find Out The Truth, First Advantage, HireRight, Instant Checkmate, PeopleConnect, The Control Group, TruthFinder
Three alternatives
BackgroundChecks.com, Certn, HireShieldTwo alternatives
Pin, Universal Background ScreeningThree alternatives
Certn, HireShield, Mitratech AssureHireTwo alternatives
BackgroundChecks.com, GoodHireDeepSeek V4 FlashGoodHireGoodHireHeldCheckragainst: SterlingBackgroundChecks.com, Certnno first choiceagainst: Certn, First Advantage, Sterlingagainst: Accurate Background, BeenVerified, Checkr, First Advantage, HireRight
Four alternatives
Accurate Background, Certn, Checkr, LexisNexis DiligenceOne alternative
CheckrFour alternatives
BackgroundChecks.com, GoodHire, HireRight, ShareAble for HiresTwo alternatives
Checkr, GoodHireTwo alternatives
Checkr, GoodHireLlama 4 MaverickGoodHireCheckrChangedno first choiceCertn, Zincno first choiceagainst: Checkr, GoodHire, Sterling
Four alternatives
BackgroundChecks.com, Certn, HireShield, Mitratech AssureHireTwo alternatives
Certn, HireRightFour alternatives
BackgroundChecks.com, Checkr, GoodHire, Mitratech AssureHireQwen 3.7 FlashGoodHireGoodHireHeldCertnGoodHireno first choiceagainst: IBM, Sterlingagainst: Atlantic Screening, BeenVerified, HireRight, Instant Checkmate, Sterling, TruthFinder
Two alternatives
BackgroundChecks.com, CertnTwo alternatives
Checkr, ChecksterThree alternatives
BackgroundChecks.com, Checkr, GoodHireThree alternatives
Certn, Checkr, Zinc WorksTwo alternatives
Checkr, GoodHireKimi K2Checkr, GoodHireagainst: SterlingShareAble for HiresChangedGoodHireBackgroundChecks.comagainst: Accurate Background, Checkrno first choiceagainst: BackgroundChecks.com, First Advantage, HireRight, Instant Checkmate, TruthFinder
One alternative
CertnTwo alternatives
Certn, GoodHireFour alternatives
Accurate Background, Bchex, Certn, CheckrThree alternatives
Bchex, First Advantage, True HireGLM 4.7 FlashXCheckrGoodHireChangedagainst: First Advantage, HireRightCheckr, GoodHireVerified Credentialsno first choiceagainst: ADP Screening & Selection Services, Accurate Background, BackgroundChecks.com, First Advantage, HireRight, National Public Data, Sterling, WeCheckGlobal
Three alternatives
BackgroundChecks.com, GCheck, GoodHireTwo alternatives
Checkr, Universal Background ScreeningSix alternatives
ADP RUN, Accurate Background, BackgroundChecks.com, Certn, GCheck, Verified FirstTwo alternatives
BackgroundChecks.com, GoodHireMiniMax M2.5CheckrCheckrHeldCheckrBackgroundChecks.com, Certnno first choiceagainst: BackgroundChecks.com, Checkr, HireRight, People Finders, Sterling, USA People Search
Two alternatives
Accurate Background, ShareAble for HiresThree alternatives
Accurate Background, BackgroundChecks.com, CertnThree alternatives
BackgroundChecks.com, GCheck, GoodHireOne alternative
CheckrBold 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
Seventy-two 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 10:05 | yes | 16 | 7 s |
| Direct recommendation | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 10:52 | yes | 2 | 4 s |
| Direct recommendation | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 10:55 | yes | 17 | 23 s |
| Direct recommendation | Perplexity Sonar | sonar | 2026-10-01 08:13 | yes | 17 | 3 s |
| Direct recommendation | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 10:05 | yes | 20 | 9 s |
| Direct recommendation | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 11:08 | yes | 5 | 3 s |
| Direct recommendation | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 09:38 | yes | 21 | 20 s |
| Direct recommendation | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 09:13 | yes | 5 | 2 s |
| Direct recommendation | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 08:29 | yes | 5 | 17 s |
| Direct recommendation | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 10:37 | yes | 10 | 18 s |
| Direct recommendation | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 08:42 | yes | 17 | 41 s |
| Direct recommendation | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 08:02 | yes | 5 | 12 s |
| Paraphrase | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 09:12 | no | 0 | 2 s |
| Paraphrase | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 10:13 | yes | 2 | 6 s |
| Paraphrase | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 12:18 | yes | 10 | 56 s |
| Paraphrase | Perplexity Sonar | sonar | 2026-10-01 11:08 | yes | 20 | 4 s |
| Paraphrase | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 11:10 | yes | 24 | 7 s |
| Paraphrase | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 09:51 | yes | 5 | 5 s |
| Paraphrase | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 07:48 | yes | 21 | 27 s |
| Paraphrase | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 08:55 | yes | 5 | 2 s |
| Paraphrase | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 11:01 | no | 0 | 22 s |
| Paraphrase | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 11:11 | yes | 14 | 19 s |
| Paraphrase | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 08:07 | yes | 15 | 63 s |
| Paraphrase | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 09:05 | yes | 5 | 24 s |
| Comparative | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 11:57 | yes | 9 | 8 s |
| Comparative | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 08:54 | yes | 4 | 7 s |
| Comparative | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 08:12 | yes | 17 | 26 s |
| Comparative | Perplexity Sonar | sonar | 2026-10-01 10:21 | yes | 16 | 3 s |
| Comparative | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 10:04 | yes | 20 | 14 s |
| Comparative | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 10:43 | yes | 13 | 9 s |
| Comparative | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 11:02 | yes | 21 | 45 s |
| Comparative | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 08:02 | yes | 5 | 1 s |
| Comparative | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 08:15 | yes | 8 | 31 s |
| Comparative | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 11:47 | yes | 14 | 27 s |
| Comparative | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 11:24 | yes | 20 | 99 s |
| Comparative | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 08:37 | yes | 9 | 12 s |
| Budget constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 11:18 | yes | 9 | 7 s |
| Budget constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 08:57 | yes | 3 | 4 s |
| Budget constrained | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 09:26 | yes | 18 | 21 s |
| Budget constrained | Perplexity Sonar | sonar | 2026-10-01 07:28 | yes | 20 | 3 s |
| Budget constrained | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 07:44 | yes | 22 | 8 s |
| Budget constrained | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 07:51 | yes | 5 | 3 s |
| Budget constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 08:49 | yes | 19 | 26 s |
| Budget constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 08:32 | yes | 5 | 2 s |
| Budget constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 11:19 | yes | 5 | 21 s |
| Budget constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 10:22 | yes | 14 | 22 s |
| Budget constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 10:25 | yes | 19 | 52 s |
| Budget constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 11:02 | yes | 5 | 10 s |
| Scale constrained | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 10:24 | no | 0 | 5 s |
| Scale constrained | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 10:24 | no | 0 | 7 s |
| Scale constrained | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 12:17 | yes | 13 | 61 s |
| Scale constrained | Perplexity Sonar | sonar | 2026-10-01 11:08 | yes | 17 | 5 s |
| Scale constrained | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 08:23 | yes | 18 | 13 s |
| Scale constrained | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 09:32 | no | 0 | 8 s |
| Scale constrained | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 11:27 | yes | 22 | 44 s |
| Scale constrained | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 12:10 | yes | 5 | 3 s |
| Scale constrained | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 07:54 | yes | 5 | 37 s |
| Scale constrained | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 11:07 | yes | 15 | 28 s |
| Scale constrained | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 09:57 | yes | 15 | 37 s |
| Scale constrained | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 10:55 | no | 0 | 8 s |
| Negative framing | Claude Haiku 4.5 | claude-haiku-4-5-20251001 | 2026-10-01 08:19 | yes | 18 | 10 s |
| Negative framing | GPT-5.4 mini | gpt-5.4-mini-2026-03-17 | 2026-10-01 08:37 | yes | 5 | 5 s |
| Negative framing | Gemini 3.5 Flash | gemini-3.5-flash | 2026-10-01 08:59 | yes | 30 | 27 s |
| Negative framing | Perplexity Sonar | sonar | 2026-10-01 09:20 | yes | 18 | 3 s |
| Negative framing | Grok 4.1 Fast | spacexai/grok-4.1-fast-non-reasoning via vertex | 2026-10-01 11:14 | yes | 25 | 12 s |
| Negative framing | Mistral Small | mistral/mistral-small via mistral | 2026-10-01 12:05 | yes | 15 | 8 s |
| Negative framing | DeepSeek V4 Flash | deepseek/deepseek-v4-flash via deepinfra | 2026-10-01 11:08 | yes | 23 | 31 s |
| Negative framing | Llama 4 Maverick | meta/llama-4-maverick via bedrock | 2026-10-01 11:10 | yes | 5 | 2 s |
| Negative framing | Qwen 3.7 Flash | alibaba/qwen3.7-flash via alibaba | 2026-10-01 11:28 | yes | 10 | 32 s |
| Negative framing | Kimi K2 | moonshotai/kimi-k2 via novita | 2026-10-01 08:47 | yes | 25 | 29 s |
| Negative framing | GLM 4.7 FlashX | zai/glm-4.7-flashx via zai | 2026-10-01 09:51 | yes | 23 | 49 s |
| Negative framing | MiniMax M2.5 | minimax/minimax-m2.5 via minimax | 2026-10-01 10:58 | yes | 16 | 54 s |
Normalization in this category
Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.
ShowHide
Category-scoped readings
Accurate read as Accurate Background
RUN Powered by ADP read as ADP RUN
Run Powered by ADP read as ADP RUN
Unresolved, counted raw
ADP Screening & Selection Services
Atlantic Screening
B&B Reporting
CI Checked SMB
DataCheck
GoodEgg/Foley
InfoTrack
LexisNexis Diligence
People Finders
PersonIQ
Signify
The Control Group (PubRec, IntelicareDirect)
TransUnion's ShareAble for Hires
True Hire
USA People Search
Verifications.com
Vertical Identity
WeCheckGlobal
Zinc Works
Discontinued, still offered
No shut-down product was recommended here.