2026 comparison
Best website visitor identification software.
Updated October 12, 2026 · Knock2
Knock2, RB2B, Warmly, Vector, Snitcher, Leadfeeder, Lead Forensics and Leadinfo, compared on person-level match rate, company-level match rate, price, and what your team can do with the result. Every competitor figure is quoted from that vendor’s own public page, with the date.
Top picks for 2026
The short list first.
Knock2 is listed first because this is Knock2’s comparison, not an independent award. After that, tools are ordered by what a rep can do next: person-level tools, then company-level only.
- 1Knock2Person + companyThe person on 62% of US engaged sessions and the company on 93% of engaged sessions worldwide. Month-to-month from $199. See how visitor identification works or the product page.
- 2RB2BPerson, USPublishes 15-20% person-level coverage of US visitors on Starter and Pro, and 35-45% on Pro+. Pricing: Free at $0, Starter $79/mo, Pro from $149/mo, Pro+ from $199/mo. Sends visitors to Slack, the CRM and sequencers. Knock2 vs RB2B.
- 3WarmlyAI chatQuarterly or annual contracts from $4,875 a quarter or $10,000 a year; AI chat starts at $20,000. Its help center describes contact identification around 45%, without stating the denominator. Knock2 vs Warmly.
- 4VectorPerson, ABM platformContact-level identification on ~30-35% of US website visitors (15-30% on its de-anonymization page). Priced as a whole ABM platform from $36,000 a year. Knock2 vs Vector.
- 5SnitcherCompany, then person after a formNames the company from IP, and a person only once they give an email through a form, login or email link. From $49/month. Knock2 vs Snitcher.
- 6Leadfeeder, Lead Forensics and LeadinfoCompany onlyThe right pick when the question is which account showed up. The wrong pick when a rep needs the person who visited.
Two different products
Person-level versus company-level.
Most category listicles blend two products into one score. Company-level identification tells you the account was on the site. Person-level identification tells you which person. Google Analytics tells you neither: it reports sessions, sources and pages.
Person-level
Name, title, work email, phone and LinkedIn. Knock2 does this for 62% of US engaged sessions. It is US-only, on purpose, so the product stays inside GDPR, CCPA and ePrivacy expectations everywhere else.
Company-level
Which company visited, for account-based routing and target-account coverage. Knock2 does this for 93% of engaged sessions, globally. Leadfeeder, Lead Forensics and Leadinfo stop here, and Snitcher does too until a visitor gives an email.
An engaged session, per Google Analytics, lasts 10 seconds or longer or has 2 or more pageviews. Results vary by traffic, geography and industry.
How we evaluated
Four questions, no combined score.
No weights. A single grade would hide the decision that actually matters: whether the output is a person your rep can write to.
01
Match-rate denominator
Knock2's 93% (company) and 62% (person, US traffic) are shares of engaged sessions. A vendor that says "of visitors" or "of traffic" is on a different base, and we do not convert one into the other.
02
Person versus company
Company-level names the account. Person-level names a contact: name, title, work email, phone and LinkedIn. Knock2 does person-level on US traffic and returns the company everywhere else.
03
What happens after the match
A LinkedIn profile in Slack, a chatbot on the site, and a contact routed into the CRM are different products. Workflow notes come from Knock2's published comparisons or the vendor's own page.
04
Pricing model
Month-to-month or annual, identification alone or a larger platform, and whether seats are included. Prices are copied from each vendor's pricing page on the date shown.
The 2026 comparison
Side by side, with sources.
Knock2 figures are the ones published on visitor identification and pricing. Competitor figures are quoted from each vendor’s own pricing page and help center, linked in the table.
Swipe sideways to see every column →
| Software | Person-level | Company-level | Price | What you do with it |
|---|---|---|---|---|
| Knock2 | 62% of US engaged sessions.Name, title, work email, phone, LinkedIn. | 93% of engaged sessions, globally. | $199 to $999/month: Startup $199, Pro $349, Growth $499, Growth Plus $749, Scale $999.Month-to-month. 7-day free trial. Annual billing optional. | Buying committee on every plan. Routes into HubSpot, Salesforce, Slack, Apollo, Outreach, Lemlist, and the rest of the integrations. |
| RB2BComparison → | 15-20% of US visitors on Starter and Pro, 35-45% on Pro+.Contact-level Site ID (US only) on the pricing page. Coverage bands, not engaged-session rates. | 15-20% on Free, Starter, and Pro. 35-45% on Pro+.RB2B's coverage label, not an engaged-session rate, so not comparable to Knock2's 93%. | Free $0/mo: 150 resolutions, company only. Starter $79/mo: 300 resolutions, LinkedIn URLs, no emails. Pro from $149/mo: business emails, integrations. Pro+ from $199/mo: Premium Resolution.A resolution is one unique visitor per 30-day cycle (credit article). 7-day trial. | Sends visitors to Slack, and on Pro and Pro+ to HubSpot, Salesforce, Instantly, Smartlead, HeyReach and Clay. No buying committee listed. |
| WarmlyComparison → | Around 45% contact identification, 50%+ with Warmly's UTM parameter.Warmly help center. Denominator not stated. | Around 60% company identification.Warmly help center. Denominator not stated. | From $10,000/year, or $4,875 a quarter. Inbound Chat $20,000/year. AI Inbound Autopilot $30,000/year.No monthly plan listed. | AI chat and AI agents on its Inbound Chat and Autopilot plans. Knock2 does not add a chatbot; reps do the outreach. |
| LeadfeederComparison → | Not identified. Verified contacts come from its database on Activate, from €369/month. | Up to 45% of visiting companies.Leadfeeder's homepage; base not stated. Dealfront is now Leadfeeder again. | Free Lite plan (last 100 companies, 7-day history). Paid: €79, €369, €599 a month billed annually; €113, €527, €599 billed monthly.Scales with identified companies and credits. Euros as published on the pricing page. | Shows which accounts showed up. A rep still has to guess who to contact. |
| SnitcherComparison → | Only after they give an email.Its Identity Layer docs: through a form, login, or email link, first-party data only. No person-level rate published. | Company from IP address.No rate published. | From $49/month for up to 50 companies, up to $529/month for 4,001-5,000.About 30% off annually. Unlimited seats. Pricing page. | Company data, plus the people who give an email. Integrations include Slack, Apollo, Lemlist and Smartlead. |
| VectorComparison → | ~30-35% of US website visitors at the contact level.Visitor ID page. The de-anonymization page says 15-30% of traffic. Neither is an engaged-session rate. | Included with the contact match.No separate company-only rate published. | Presets of $36,000, $60,000 and $96,000 a year.One annual contract for the whole platform, sized by usage. Pricing page. | Named contacts inside a full ABM platform: signals, scoring, journeys, advertising, attribution. |
| Lead ForensicsComparison → | Not identified. Offers decision-maker contacts at the company. | No match rate published. | Not published; based on your website traffic.Unlimited users. One-week trial from a demo form or a call. Pricing page. | Company identification with CRM integrations, other tools through Zapier. No Slack or sequencers listed. |
| LeadinfoComparison → | Not identified. Decision makers come from its database. | Typically around 30% of total traffic.Leadinfo’s pricing page; a different base from engaged sessions. | Starter €69, Scale €159, Pro €359 a month.HubSpot from Scale, Salesforce on Pro. 14-day trial. | Shows which accounts showed up, with Slack and Teams alerts. Its Autopilot add-on sends outreach from Leadinfo. |
RB2B figures were read from its pricing page on October 8, 2026, and every other vendor’s on October 12, 2026, from its own website, pricing page, docs or help center. Each comparison page links its sources. Where Knock2 has not published a competitor figure, the cell says so. Do not read a blank as a zero.
How to read a match rate
A match rate without a denominator is an ad.
Knock2 publishes two, both against engaged sessions: 93% account-level, and 62% person-level on US traffic. RB2B’s pricing page prints coverage bands of 15-20% and 35-45%, labeled coverage, not engaged sessions. Vector says 30-35% of US traffic on one page and 15-30% on another. Leadinfo says around 30% of total traffic. Warmly’s 60% and 45% are its help-center figures, and Warmly does not say which visits they are measured against, so they are not a head-to-head with Knock2’s engaged-session rates.
The practical test is still your own site. Run two tools on the same traffic. Count named people with a business email, not logos in a feed.
Which tool fits which job
Pick by what your team does next.
Reach a named person this week
Start with Knock2
Person-level identification on US traffic, the company everywhere else, the rest of the buying committee, and routing into the CRM and sequencing tools you already use.
Have AI talk to visitors
Warmly
That is Warmly's product, on an annual contract. Knock2 does not add a chatbot. Some teams run a chat tool and Knock2 together; if you buy one, decide whether AI or your reps should hold the conversation.
Only need the company name
Leadfeeder, Lead Forensics, Leadinfo
Built for account-level. They do not return the person who visited, so if the next step is an email or a call you still have to guess who to reach.
Knock2 (knock2.ai) is not Knock AI (knock-ai.com). They are different companies. This page is about Knock2, the website visitor identification product at knock2.ai. A roundup that swaps the domains is comparing the wrong product.
Keep exploring
Related reading
Product
Website visitor identification software
Person-level identification, the buying committee, and routing into your CRM.
Read more →How it works
Visitor identification
How Knock2 names 62% of US engaged sessions and 93% of accounts.
Read more →The analytics gap
Who visited my website?
Why Google Analytics counts the visit but never names the visitor.
Read more →Free tool
Website visitor identification tool
Enter your domain and get 5 buyers matched to your site, free.
Read more →FAQ
Frequently asked questions
What is the best website visitor identification software?
For a team that wants the person behind a visit, not only the company, Knock2 is the one we would start with. It identifies 62% of US engaged sessions at the person level and 93% of engaged sessions at the account level, with plans from $199 a month and a 7-day free trial. Company-only tools such as Leadfeeder, Lead Forensics and Leadinfo answer a different question. The right pick is the one whose output your reps can actually use.
What is the difference between person-level and company-level identification?
Company-level identification tells you which company visited. Person-level identification tells you who: name, title, work email, phone and LinkedIn. Knock2 does both. Person-level runs on US traffic only. Everywhere else, Knock2 returns the company.
How are Knock2's 62% and 93% measured?
Both figures are measured against engaged sessions. Google Analytics defines an engaged session as 10 seconds or more, or 2 or more pageviews. 93% is account-level. 62% is person-level on US traffic. They are not a promise that every visit becomes a named contact, and no vendor's rate is 100%.
How does Knock2 compare with RB2B?
RB2B's pricing page, checked October 8, 2026, lists person-level coverage of US visitors at 15-20% on Starter and Pro and 35-45% on Pro+. Those are coverage bands, not engaged-session rates, so they are not directly comparable to Knock2's 62%. Air, testing both on its own site, saw 3,500 people on Knock2 against 2,500 on RB2B. RB2B prices Free at $0 a month, Starter at $79, Pro from $149 and Pro+ from $199, with a 7-day trial. Knock2 also returns the account globally, the rest of the buying committee, and routing into your CRM and sequencing tools. See Knock2 vs RB2B.
How does Knock2 compare with Warmly?
Warmly sells quarterly and annual contracts, with AI chat and AI agents on its higher plans. Its help center, checked October 12, 2026, describes company identification around 60% and contact identification around 45% (50%+ with Warmly's UTM parameter), without saying which visits those are measured against. Pricing starts at $10,000 a year, or $4,875 a quarter, with no monthly plan. Knock2 is month-to-month from $199 and does not put a chatbot on your site. See Knock2 vs Warmly.
What match rate and price does Vector publish?
Vector's website visitor ID page says about 30-35% of US website visitors at the contact level. Its de-anonymization page says 15-30% of traffic. Neither page says the base is engaged sessions, so neither is a head-to-head with Knock2's 62% of US engaged sessions. Vector's pricing page, checked October 12, 2026, shows presets of $36,000, $60,000 and $96,000 a year, on one annual contract for the whole platform. See Knock2 vs Vector.
How much does website visitor identification software cost?
Knock2 plans run from $199 to $999 a month: Startup $199, Pro $349, Growth $499, Growth Plus $749 and Scale $999, month-to-month with a 7-day free trial. RB2B lists Free at $0, Starter at $79, Pro from $149 and Pro+ from $199. Warmly's published plans start at $10,000 a year and Vector's at $36,000 a year. Lead Forensics does not publish prices.
Is Knock2 the same company as Knock AI?
No. Knock2 is knock2.ai, website visitor identification for B2B revenue teams. Knock AI is knock-ai.com, a different company. If a listicle mixes the two names, check the domain before you compare match rates or pricing.
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