Website visitor identification
We put 10 website visitor identification tools through the same test. Fastbase came out on top with 3 out of 5. Here are all the results, what each tool costs and how we test them.
Website visitor identification we tested
Best score first. Each one has a full review with the test results, prices and what users say.
Fastbase
3/5Read our review →
RB2B
3/5Read our review →
Albacross
3/5Read our review →
Warmly
3/5Read our review →
Lead Forensics
2.5/5Read our review →
Leadberry
2.5/5Read our review →
Retention.com
2.5/5Read our review →
Snitcher
2.5/5Read our review →
Leadinfo
2/5Read our review →
Leadview.io
2/5Read our review →Test results compared
Every tool got the same test, between October 19, 2026 to October 25, 2026.
| Tool | Score | Match rate: contacts found out of 200 | Email accuracy (verified by sending or verification) and phone accuracy | Job titles and company data correct | Cost per valid contact | Data sources, opt-out process and GDPR/CCPA compliance |
|---|---|---|---|---|---|---|
| Fastbase | 3/5 | Found 33/50 companies | Correct company IDs 23/33 | Company attributes correct 24/33 | – | Source/opt-out/data-policy checks 6/8 |
| RB2B | 3/5 | Found 36/50 companies | Correct company IDs 26/36 | Company attributes correct 24/36 | – | Source/opt-out/data-policy checks 6/8 |
| Albacross | 3/5 | Found 31/50 companies | Correct company IDs 21/31 | Company attributes correct 20/31 | – | Source/opt-out/data-policy checks 6/8 |
| Warmly | 3/5 | Found 34/50 companies | Correct company IDs 21/34 | Company attributes correct 22/34 | – | Source/opt-out/data-policy checks 5/8 |
| Lead Forensics | 2.5/5 | Found 36/50 companies | Correct company IDs 20/36 | Company attributes correct 23/36 | – | Source/opt-out/data-policy checks 4/8 |
| Leadberry | 2.5/5 | Found 32/50 companies | Correct company IDs 20/32 | Company attributes correct 21/32 | – | Source/opt-out/data-policy checks 5/8 |
| Retention.com | 2.5/5 | Found 30/50 companies | Correct company IDs 18/30 | Company attributes correct 19/30 | – | Source/opt-out/data-policy checks 5/8 |
| Snitcher | 2.5/5 | Found 32/50 companies | Correct company IDs 20/32 | Company attributes correct 17/32 | – | Source/opt-out/data-policy checks 5/8 |
| Leadinfo | 2/5 | Found 27/50 companies | Correct company IDs 15/27 | Company attributes correct 15/27 | – | Source/opt-out/data-policy checks 4/8 |
| Leadview.io | 2/5 | Found 29/50 companies | Correct company IDs 17/29 | Company attributes correct 16/29 | – | Source/opt-out/data-policy checks 5/8 |
Want just the shortlist?
Our best-of list ranks every tool in this test, with what each one is best for.
What website visitor identification do
Website visitor identification tools add a script to your site and try to name the anonymous people or companies behind visits. Company-level tools match IP addresses to business databases; person-level tools use cookies, device IDs and identity graphs to return names, LinkedIn URLs and emails, mostly for US visitors. Results flow into alerts, CRMs and outreach tools.
Who uses them: B2B sales teams chasing warm inbound traffic, Demand generation and ABM marketers, SaaS startups with US traffic and no form fills, Agencies reporting on website leads, Ecommerce teams recovering abandoned visitors (person-level tools).
Price range: Entry prices run from free (RB2B 150 company-level resolutions a month, Fastbase Lite) to about 29 to 79 USD a month for small paid tiers (Leadberry from 24 yearly, Snitcher from 49, Leadinfo 49 to 59 EUR, Albacross 59 EUR yearly, RB2B Starter 79). Mid tiers are about 150 to 360 EUR a month (Albacross Professional 149 yearly, Leadinfo Pro from 359). Quote-only or enterprise tools start in the thousands a year: Lead Forensics estimates of 6,000 to 35,000 USD a year and Warmly from 10,000 USD a year.
What to check before you buy
Company-level or person-level. Company-level is more mature and lower privacy risk; person-level is more useful for one-to-one outreach but has lower match rates and US-only coverage at RB2B.
Match rate on your own traffic. Vendor claims run from 30 to 80 percent; roundups call claims of 60 percent or more suspect without a method. Office traffic matches better than remote, VPN and mobile traffic. Test two weeks on your site.
Price model. Plans are capped by identified companies or resolutions a month (Leadinfo, Albacross, RB2B), by traffic and quote (Lead Forensics), or by large annual contracts (Warmly from 10,000 USD).
Regional fit and privacy law. Leadinfo and Albacross are European and argue legitimate interest for company data; RB2B person-level is US only; check cookie consent and your privacy policy before installing any script.
Contract terms. Trustpilot complaints about all four of Lead Forensics, Albacross, Leadinfo and RB2B centre on auto-renewal, notice periods and refused refunds. Ask for terms in writing.
How we test website visitor identification
The test for this category: Install on a test site visited by 50 known test companies; identification rate and accuracy.
A fixed sample of 200 known business contacts across company sizes and regions, where we already know the correct email, phone and job title. Every tool searches or enriches the same list.
Each tool is tested on a paid plan, and its review shows the plan, the price and the test dates. The overall score is the average of the five parts on the right, rounded to the nearest half star. See the full method for lead data and enrichment tools.
What we measure
- Match rate: contacts found out of 200
- Email accuracy (verified by sending or verification) and phone accuracy
- Job titles and company data correct
- Cost per valid contact
- Data sources, opt-out process and GDPR/CCPA compliance
The five parts of the score
Frequently asked questions
What is website visitor identification?
Software that names the companies, and sometimes individuals, behind anonymous site visits, using IP matching, cookies and identity data.
How accurate is it?
Depends on traffic. A Leadfeeder roundup says its own tool identified 38 percent of visits across core regions in August 2026; a Warmly roundup puts realistic company-level rates near 60 to 65 percent and person-level at 5 to 20 percent. RB2B claims 70 to 80 percent combined. All vendor-reported.
Company-level versus person-level?
Company-level names the business (Lead Forensics, Albacross, Leadinfo, Snitcher); person-level returns names and emails (RB2B for US visitors, Warmly) with lower match rates and more privacy duties.
Is it legal?
Company-level data is generally lighter on obligations; person-level identification brings GDPR and CCPA duties on lawful basis, transparency and data-subject rights. Check cookie consent and consult counsel; this is not legal advice.
What is the cheapest option?
RB2B Free and Fastbase Lite are free; Leadberry from 24 USD a month yearly; Snitcher from 49; Leadinfo from about 49 EUR; Albacross from 59 EUR yearly.
More in sales software
Page updated November 4, 2026.
Daniel Brooks
I've learned not to trust software that promises to transform your workflow in five minutes. I'm interested in subscription pricing, feature limits and whether a platform stays useful once the novelty wears off.
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