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Knock2

Device-level visitor ID with the match rates written on the pricing page and an MCP endpoint for your AI

Knock2 is a website visitor identification platform that resolves anonymous traffic to named individuals on US visits and to companies worldwide, using device-level matching across several consented publisher identity graphs rather than a single provider; it adds plain-English AI lead scoring, automatic buying-committee expansion, real-time routing into Slack and CRMs, an MCP endpoint for AI assistants, and prices from $199 a month for 600 identified contacts with every feature included on every tier.

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Overview

Knock2 is a 2023 New York company founded by John DiLoreto, a sales operator rather than a data engineer, and the product carries that lineage. DiLoreto was employee number one at GoParrot before Square acquired it, ran sales at Flipdish through its climb to unicorn status, and co-founded a Y Combinator-backed startup called Penguin AI. Knock2 is the tool he says he wanted through all of that: something that tells a rep who is on the site right now, scores whether they matter, and puts them in Slack before the moment passes.

The technical position is device-level matching across multiple identity graphs rather than dependence on one vendor's data. Major publishers tie logged-in user identities to device fingerprints through consent frameworks; Knock2 buys into several of those co-ops and matches your visitors against the union rather than the intersection. That is the honest explanation for why its numbers run higher than single-source competitors, and Knock2 publishes those numbers with a definition attached: 93 percent account-level and 62 percent person-level on US engaged sessions, where an engaged session means ten seconds or more, or two or more pageviews. Naming the denominator is a small act of integrity that most of this category avoids entirely.

Take both numbers seriously and skeptically. Ninety-three percent account-level is plausible against a filtered engaged-session denominator and near-meaningless against total traffic including bounces, bots, and mobile drive-bys. Sixty-two percent person-level applies only to US traffic; outside the United States the person layer is off, by design and by law. On your own site, plan for something below both figures, and use the seven-day trial to measure the number that actually governs your economics, which is identified contacts per thousand sessions rather than any percentage the vendor quotes.

Commercially, Knock2 does the unusual and correct thing: every tier has every feature. The five published plans from $199 to $999 differ only in monthly contact volume and credits. There is no gating of the API, the MCP endpoint, the webhooks, the CRM connectors, or the buying-committee expansion behind an upper tier, and no sales call anywhere in the ladder. For a small business that is a materially better structure than the industry norm of putting the integration you need one tier above the volume you need.

Best for

US-focused B2B sales teams that want a named person and their buying committee in Slack within seconds of the visit, teams that already own a sequencer and want a clean identification layer feeding it, and buyers who want every feature available at the entry price rather than gated behind an upper tier.

Not the right fit for

  • European companies and anyone selling primarily into the EU or UK. Person-level identification is US-only, so the headline capability is switched off for the traffic you care about and you are left paying $199 a month for account-level data that Leadinfo or Snitcher sell for less.
  • Consumer businesses. The identity graphs and the scoring model are built around work identities and firmographics, and a DTC brand should be looking at Opensend or LeadPost instead.
  • Buyers who need the vendor to hand them a compliance file. Knock2 argues it is GDPR, CCPA, and ePrivacy compliant by design because person-level processing never touches EU visitors, and compares its pixel to Meta and LinkedIn retargeting, but it does not publish opt-out mechanics or data broker registrations.
  • Low-traffic sites. Six hundred identified contacts a month at the entry tier presumes real volume; a site with a few hundred sessions total will pay $199 for a trickle and conclude the category does not work.
  • Teams that want the vendor to also send the emails. There is no built-in sequencer or sending infrastructure here; Knock2 routes into Lemlist, Instantly, Apollo, or Outreach and expects you to own that layer.

How it works

  1. 1

    You drop a single tracking script on the site, which the vendor says takes under five minutes and which requires no per-platform integration.

  2. 2

    Each visiting session is matched at device level against several consented publisher identity graphs at once. Where the union of those graphs holds a US identity, the session resolves to a person; otherwise, and everywhere outside the United States, it resolves to an account.

  3. 3

    A person-level match returns name, verified email, phone number, title, company, and LinkedIn profile. An account-level match returns the company with firmographics and the page-level behaviour of the visit.

  4. 4

    AI lead scoring rates every identified visitor against an ideal customer profile you describe in plain English rather than by building filter rules, and a thumbs-up or thumbs-down feedback loop sharpens the scoring as you correct it.

  5. 5

    Buying-committee expansion takes an identified account and finds the three to five other people who actually decide, so the one anonymous researcher who visited becomes a working target list rather than a single contact.

  6. 6

    Real-time routing fires on lead score, pages visited, firmographics, persona match, or UTM parameters, pushing into Slack, HubSpot, Salesforce, Apollo, Outreach, Lemlist, Instantly, or Clay, with webhooks covering Zapier, Make, and n8n. An MCP endpoint exposes the same data to Claude and other AI assistants, and a REST API covers everything else.

Feature breakdown

27 features in 5 modules

Identification

Multiple identity graphs, one script, and published numbers with a stated denominator.
Person-level identification on US traffic
Returns name, verified email, phone number, job title, company, and LinkedIn profile for resolvable US visitors. The layer is deliberately unavailable outside the United States.
Account-level identification worldwide
Every market gets company resolution with firmographics, so international traffic is downgraded rather than invisible.
Device-level matching across multiple graphs
Rather than reselling one identity provider, Knock2 matches against several consented publisher login co-ops at once, which is the mechanical reason its claimed rates run above single-source competitors.
Published match rates with a definition
93 percent account-level and 62 percent person-level, both stated against engaged sessions defined as ten seconds or more or two or more pageviews. Naming the denominator is rarer in this category than it should be.
Page-level visit context
Pages viewed, time on site, and referral context attach to each identified record, which is the difference between a name and a reason to call.
Under five minute setup
One script, no tag manager configuration, no platform-specific integration, and data begins appearing on the same day.

Scoring and buying committee

The AI layer that decides which identified visitors deserve a human.
Plain-English ICP scoring
You describe your ideal customer in a sentence rather than building filter rules, and the model scores every identified visitor against it.
Feedback loop
Thumbs-up and thumbs-down on scored leads retrains the model against your actual judgement rather than leaving the score static.
Buying committee discovery
Automatically expands an identified account to the three to five other people who influence the decision, which is the feature that turns one anonymous researcher into a workable account plan.
Persona matching
Routing can key on whether the identified person matches a target persona, so a VP of Engineering and a student researcher are handled differently.
Firmographic and behavioural filters
Score, pages visited, firmographics, and UTM parameters can all gate what reaches a rep, which is how the feed stays workable at volume.

Routing and integrations

Every connector on every tier, with no upper-tier gate.
Slack routing in real time
Identified visitors post into Slack channels as they browse, filtered by whatever routing rules you set, which is the workflow most teams actually buy this category for.
CRM connectors
Native HubSpot and Salesforce integrations create and update records rather than sending notifications you have to retype.
Outbound tool connectors
Apollo, Outreach, Lemlist, Instantly, and Clay receive identified contacts directly, which is how Knock2 avoids needing a sequencer of its own.
Webhooks
Zapier, Make, and n8n endpoints cover anything without a native connector, including internal warehouses and custom scoring.
MCP endpoint
A Model Context Protocol connector exposes visitor data to Claude and other AI assistants directly, so a rep can ask who visited this week rather than exporting a CSV. Very few vendors in this category ship this.
REST API
Available on every tier including the $199 entry plan, which is not the norm among competitors.

Commercial structure

The pricing decisions that make this a small-business product rather than an enterprise one.
Every feature on every tier
The five published plans differ only in monthly contact volume and credits. Nothing functional is gated above the entry price.
Month-to-month or annual
No annual lock-in requirement, which matters in a category where several vendors will only sell twelve-month contracts.
Credit-based enrichment
Each tier carries a credit pool sized at roughly six credits per included contact, which governs enrichment depth beyond the base reveal.
Seven-day free trial
Self-serve, no sales call, and long enough to measure identified contacts per thousand sessions on your own traffic before committing.
No sales call until custom volume
Every published tier from $199 to $999 signs up through the dashboard; only enterprise volume requires a conversation.

Compliance posture

Stated honestly enough that you can evaluate it, and thin in the places that matter.
US-only person layer
Person-level identification is confined to US traffic. This is jurisdictional ringfencing, not GDPR compliance: the capability is lawful in Europe because it is switched off there.
Consented publisher co-ops
Identity derives from publishers whose logged-in users accepted a consent framework. Those individuals consented to the publisher, not to your company, which is the ethical seam of the whole model.
Pixel comparison argument
Knock2 positions its technology as comparable to Meta, Google, and LinkedIn retargeting pixels. That is a fair analogy for the mechanism and a weak one for the output, since those platforms do not hand you the person's name and mobile number.
Account-level fallback everywhere else
Non-US traffic resolves to companies, which keeps international sites useful without touching the person-level question.
No published opt-out workflow
The site does not publish a visitor suppression mechanism or data broker registrations. Ask for both in writing before you sign if compliance review matters to you.

Use cases

4 documented

US SaaS company with two SDRs and 15,000 monthly sessions

Most of the pipeline arrives through inbound demo requests, which means the 99 percent of traffic that browses pricing and leaves is entirely wasted.

Scored, filtered identified visitors post into a Slack channel within seconds, buying-committee expansion turns each account into three or four contacts, and the records flow into Apollo where the SDRs already work.

Founder-led sales at a seed-stage startup

There is no SDR, no CRM discipline, and no time to sit in another dashboard, but the founder wants to know when a target account reads the pricing page.

Plain-English ICP scoring needs no rule building, routing sends only the handful of high-score visits to Slack, and the MCP endpoint lets the founder ask Claude who visited this week instead of opening the tool at all.

Revenue operations lead consolidating a GTM stack

The team already pays for Clay, Outreach, and Salesforce, and does not want an identification vendor that duplicates any of them or gates its API behind a $1,000 tier.

Knock2's API, webhooks, and native Clay and Outreach connectors are available on the $199 plan, so the identification layer slots in as a data source rather than as another platform to administer.

Marketing lead proving paid spend works

Ad campaigns generate sessions and almost no form fills, so campaign performance is judged on cost per click rather than on whether the right companies arrived.

UTM-aware routing and account-level identification worldwide show which campaigns brought in-profile organisations, which is the attribution argument that survives a budget review.

Pricing

from $199 per month (600 identified contacts)

Usage-based monthly subscription priced on identified contacts per month with an attached credit pool, month-to-month or annual, and every feature included on every tier.

PlanPriceIncludes
Startup$199
per month
  • Up to 600 identified contacts per month
  • 3,600 credits
  • Person-level on US traffic, account-level worldwide
  • AI scoring, buying committee, Slack and CRM routing
  • API, MCP, and webhooks included

About 33 cents per identified contact, and the full product rather than a stripped entry plan.

Pro$349
per month
  • Up to 1,500 identified contacts per month
  • 9,000 credits
  • Full feature set
  • About 23 cents per identified contact

The best value step on the ladder; the jump from Startup nearly triples volume for 75 percent more money.

Growth$499
per month
  • Up to 2,500 identified contacts per month
  • 15,000 credits
  • Full feature set
  • About 20 cents per identified contact
Growth Plus$749
per month
  • Up to 5,000 identified contacts per month
  • 30,000 credits
  • Full feature set
  • About 15 cents per identified contact
Scale$999
per month
  • Up to 7,500 identified contacts per month
  • 45,000 credits
  • Full feature set
  • About 13 cents per identified contact

The top published tier; higher volumes are quoted individually.

Billing notes

  • Month-to-month and annual billing are both offered, and the vendor does not require an annual commitment to reach the published prices.
  • Credits scale at roughly six per included contact across every tier, so the enrichment budget stays proportional as you move up rather than being squeezed at the entry plan.
  • Per-identity math at two volume steps: $0.33 per identified contact at the $199 Startup tier, and $0.13 at the $999 Scale tier. That is a 60 percent reduction in unit cost across the ladder, so if you consistently exhaust a tier it is usually cheaper to move up than to buy overage.
  • Because no feature is tier-gated, you can start at $199 with the API, MCP, and every connector, then scale purely on volume. This is unusual and worth weighing against competitors that put the integration you need one tier above the volume you need.
  • The published prices stop at $999 for 7,500 contacts. Anything larger is a quote, which is the one place a sales conversation enters the picture.

Value assessment: Per identified contact Knock2 is mid-market: more expensive than Happierleads at entry, far more expensive than RB2B's free tier, and comparable to Leadpipe once you account for what each returns. What you are paying the premium for is match rate and structure. If the 62 percent person-level figure holds anywhere near true on your US traffic, the effective cost per usable contact is lower than a cheaper tool with a thinner graph, because you are not paying for sessions that never resolve. The ungated feature set compounds that: a $199 subscription with API, MCP, buying-committee expansion, and every CRM connector is more product than several competitors sell at three times the price. The value case collapses if your traffic is not predominantly US, at which point you are buying an account-level tool at person-level prices.

Strengths & limitations

Strengths

  • Publishes match rates with a stated denominator (93 percent account-level and 62 percent person-level on engaged US sessions defined as ten seconds or two pageviews), which is more methodological honesty than this category usually offers.
  • Device-level matching across several consented identity graphs rather than reselling one provider, which is a genuine architectural reason for higher resolution.
  • Every feature on every tier: API, MCP, webhooks, all CRM and outbound connectors, buying-committee expansion, and AI scoring are available on the $199 plan.
  • Buying-committee expansion is the most useful feature here, because one anonymous researcher is rarely the buyer and three to five named influencers is an account plan.
  • An MCP endpoint for Claude and other AI assistants, which almost nobody else in this category ships and which makes the data queryable without opening the tool.
  • Month-to-month billing with a self-serve seven-day trial and no sales call anywhere below custom volume.
  • Plain-English ICP scoring with a feedback loop removes the rule-building chore that makes most scoring configurations rot within a quarter.

Limitations

  • Person-level identification is US-only, which makes the headline capability irrelevant for European, UK, and most international sales motions.
  • The 93 percent claim is measured against engaged sessions rather than total traffic, so the number that appears on your invoice per thousand raw sessions will look much less impressive than the marketing figure.
  • No opt-out workflow or data broker registration is published, which will stall a serious privacy review.
  • No built-in sequencer or sending infrastructure, so you need a separate outbound tool; whether that is a limitation or a virtue depends on your stack.
  • The company is young, small, founder-led, and has no disclosed funding, which is a real continuity risk for a vendor sitting in your identity pipeline.
  • Pricing starts at $199 with no free tier, so the smallest sites cannot test the category here the way they can with RB2B or Leadfeeder.

Head-to-head comparisons

6 alternatives

Knock2 vs Happierleads

from $99 per month (300 identified visitors)

The nearest neighbour: both are person-level, consented-co-op, self-serve, US-first tools with AI scoring. Happierleads starts at $99 for 300 contacts and bundles a full email sequencer, sending infrastructure, and third-party intent topics, with unlimited seats. Knock2 starts at $199 for 600, publishes sharper match rates with a stated denominator, and adds buying-committee expansion and MCP, but expects you to own your outbound stack. Take Happierleads if you need the whole motion on one invoice; take Knock2 if you want the better data layer feeding tools you already run.

Full Knock2 vs Happierleads comparison

Knock2 vs RB2B

from $0 (Free), then $79 per month (Starter)

RB2B is the free-tier baseline for US person-level identification, pushing names into Slack with minimal machinery. Knock2 costs $199 a month minimum but adds multi-graph matching, buying-committee expansion, AI scoring with a feedback loop, worldwide account-level fallback, an API, and MCP. If you want to find out whether this category works for you at zero cost, start with RB2B; if it works and you want the record scored, expanded, and routed properly, Knock2 is the upgrade path.

Full Knock2 vs RB2B comparison

Knock2 vs Vector

from $399 per month (Reveal, 2,500 identified visitors)

Vector is the other technically serious US person-level tool, oriented around contact-level intent and warm outbound. Knock2 is more explicitly an identification-plus-routing layer with published rates and an ungated feature set at $199. Both refuse to be enterprise ABM platforms, which is to their credit. Choose Vector if intent scoring across the buying group is the centre of your motion; choose Knock2 if the website visit itself is the trigger and you want the cheapest complete feature set.

Full Knock2 vs Vector comparison

Knock2 vs Leadpipe

from $147 per month (Pro 500)

Leadpipe returns 62-plus fields and full browsing history on a named US person from $147 a month, and is the deeper single record. Knock2 returns a leaner record but adds the buying committee around it, scores it, routes it, and exposes it over MCP. If you want maximum depth on the one person who visited, Leadpipe; if you want the account they belong to turned into a working target list, Knock2.

Full Knock2 vs Leadpipe comparison

Knock2 vs Lead Onion

from $500 per month (Starter)

Lead Onion leads with multi-source third-party intent across 20-plus providers and layers website visitors on top, from $500 a month with contact reveal credits. Knock2 leads with your own traffic and does not sell market-wide intent at all. Take Lead Onion if you want to reach accounts researching your category anywhere on the internet; take Knock2 if you believe a visit to your own site is a stronger signal than a topic surge on a review site, and want to pay less than half as much.

Full Knock2 vs Lead Onion comparison

Knock2 vs LeadPost

from $249 per month (Standard, up to 750 leads)

LeadPost is the consumer-side counterpart, resolving anonymous B2C shoppers to names, emails, and postal addresses and pushing them into email, social, display, and direct mail from $249 a month. Knock2 resolves B2B work identities and routes them to sales tooling. There is essentially no overlap: if you sell to businesses, LeadPost's consumer graph is irrelevant, and if you sell to consumers, Knock2's firmographic scoring has nothing to score.

Full Knock2 vs LeadPost comparison

Implementation & onboarding

Setup time
Under five minutes for the script, per the vendor, plus perhaps an hour writing the ICP description and the routing rules. There is no tag manager configuration or per-platform integration.
Learning curve
Low. Plain-English ICP scoring removes the rule-building step that makes most competitors' configuration painful, and the routing builder keys on obvious fields. The only genuinely new concept for most buyers is buying-committee expansion, which changes how you think about a visit.
Onboarding
Entirely self-serve across all five published tiers, including the API and MCP. The seven-day trial is short, so plan to measure identified contacts per thousand sessions immediately rather than exploring features first.
Migration notes
No historical backfill: identification begins when the script goes live, so a competitor's archive stays with the competitor. Because Knock2 has no sequencer of its own, moving off another identification vendor rarely disturbs your outbound tooling, which makes it an unusually low-risk swap. Export via API or CSV before cancelling.

Platform, API & security

Platforms
Web applicationJavaScript tracking scriptREST APIMCP endpointWebhooks
API
REST API and webhooks on every tier including the $199 entry plan, plus an MCP connector so Claude and other AI assistants can query visitor data directly.
Compliance
GDPR (account-level only for EU visitors)CCPAePrivacy Directive (vendor-stated)
Data residency
Not published.
SSO
Not published as a distinct tier feature.
Security notes
The privacy model is jurisdictional rather than consent-based on your side: person-level processing happens only on US traffic, so the product avoids GDPR exposure by not doing the risky thing in Europe rather than by making it acceptable to European regulators. Identities originate in publisher login co-ops where the individual accepted that publisher's consent framework, not yours. Knock2 compares its pixel to Meta, Google, and LinkedIn retargeting, which is fair as to mechanism and generous as to output, since those platforms do not return a person's name and mobile number. No visitor opt-out workflow or data broker registration is published; request both in writing if compliance review is a gate.

Support & resources

Channels
Email supportIn-app chatFounder-led support, with the CEO stating he personally handles tickets
Documentation
Product documentation covering setup, scoring, routing, integrations, API, and the MCP connector.
Community
No large official community; the vendor's blog carries most of the category education.

Company

Founded
2023
Headquarters
New York, New York, United States
Ownership
Privately held, founder-led
Founders
John DiLoreto
Employees
Small; not publicly disclosed
Funding
No funding rounds disclosed. The founder previously co-founded Penguin AI, a Y Combinator-backed startup, and was employee number one at GoParrot before its acquisition by Square.

Timeline

  1. 2023Founded in New York by John DiLoreto, previously employee number one at GoParrot, sales lead at Flipdish, and co-founder of Y Combinator-backed Penguin AI.
  2. 2024Ships device-level matching across multiple consented publisher identity graphs rather than reselling a single provider, and begins publishing match rates with a stated engaged-session denominator.
  3. 2025Adds AI lead scoring described in plain English with a thumbs-up feedback loop, plus automatic buying-committee expansion to three to five contacts per identified account.
  4. 2025Ships an MCP endpoint alongside the REST API and webhooks, making visitor data directly queryable by Claude and other AI assistants.
  5. 2026Publishes a five-tier ladder from $199 to $999 with every feature included on every tier, and cites more than 1,000 go-to-market leaders on the platform.

Integrations

  • HubSpot
  • Salesforce
  • Slack
  • Apollo
  • Outreach
  • Lemlist
  • Instantly
  • Clay
  • Zapier, Make, and n8n via webhooks
  • MCP connector for Claude and other AI assistants
  • REST API

Frequently asked questions

10 questions

What is Knock2?

Knock2 is a website visitor identification platform. A single script resolves your anonymous traffic to named individuals on US visits (name, verified email, phone, title, company, LinkedIn) and to companies worldwide, then scores each visitor against your ideal customer profile, expands the account to its buying committee, and routes the result into Slack, your CRM, or your outbound tool. Pricing starts at $199 a month for 600 identified contacts, with every feature available on every tier.

What match rate does Knock2 claim, and what should I actually expect?

Knock2 claims 93 percent account-level and 62 percent person-level, and unusually it states the denominator: engaged sessions, meaning ten seconds or more on site or two or more pageviews. Against total raw traffic including bounces and bots those numbers would be much lower. Person-level applies only to US visitors. On your own site, expect to land below both figures, and measure the number that governs your economics during the seven-day trial: identified contacts per thousand sessions, not a percentage.

Does Knock2 work outside the United States?

At company level, yes, worldwide. At person level, no. The person-level layer is confined to US traffic, so a European, UK, or APAC-focused sales motion gets account identification only. If most of your traffic is international, you are paying person-level prices for account-level output and should compare against Leadinfo, Snitcher, or Leadfeeder instead.

How is this different from plain IP-to-company enrichment?

IP-to-company enrichment looks up the visitor's network address in a database of corporate IP ranges. It is cheap, global, resolves nobody, and fails on residential, mobile, and VPN connections. Knock2 does that as its account-level layer, but its person-level layer works on device-level matching against several consented publisher login co-ops: individuals who signed in to a participating publisher and accepted a consent framework become resolvable by device. That yields an actual human identity rather than an organisation, which is why it is US-only and why it carries a completely different legal profile.

Is Knock2 GDPR and CCPA compliant?

The vendor states GDPR, CCPA, and ePrivacy compliance, achieved by confining person-level processing to US traffic. That is jurisdictional ringfencing, not compliance in the ordinary sense: the practice is lawful in Europe because Knock2 does not do it in Europe, rather than because European regulators have blessed it. Knock2 also argues its pixel is comparable to Meta and LinkedIn retargeting, which describes the mechanism fairly but understates the output, since those platforms do not hand you a stranger's name and mobile number. No visitor opt-out workflow or data broker registration is published, so ask for both before a compliance review.

What does an identified contact cost?

About 33 cents at the $199 Startup tier (600 contacts), and about 13 cents at the $999 Scale tier (7,500 contacts). Unit cost falls roughly 60 percent across the ladder, so if you consistently exhaust a plan it is usually cheaper to step up than to buy overage. Each tier also carries a credit pool at roughly six credits per included contact, which governs enrichment depth beyond the base reveal.

Do I have to pay more to get the API or the CRM connectors?

No, and this is Knock2's best commercial decision. The API, the MCP endpoint, webhooks, every CRM and outbound connector, AI scoring, and buying-committee expansion are all available on the $199 entry plan. The five tiers differ only in monthly contact volume and credits. Several competitors put the integration you need one tier above the volume you need; Knock2 does not.

How do identified visitors get into Slack and my CRM?

Routing rules fire in real time on lead score, pages visited, firmographics, persona match, or UTM parameters, and push into Slack, HubSpot, or Salesforce natively. Outbound tools including Apollo, Outreach, Lemlist, Instantly, and Clay have direct connectors, so identified contacts land in a sequence without a CSV. Webhooks cover Zapier, Make, n8n, and anything internal.

What is buying-committee expansion?

When a session resolves to an account, Knock2 automatically finds three to five other relevant people at that company rather than leaving you with the single individual who happened to browse. This matters because the person reading your pricing page is frequently a researcher rather than a decision maker, and a one-contact reveal is often a dead end. It is the feature that most distinguishes Knock2 from a straightforward reveal tool.

Who is behind Knock2 and how stable is the company?

Knock2 was founded in 2023 in New York by John DiLoreto, who was employee number one at GoParrot before Square acquired it, led sales at Flipdish, and co-founded Y Combinator-backed Penguin AI. The company is small, founder-led, and has no disclosed funding, with the CEO stating he personally closes deals and handles support. That is a genuine risk to weigh for a vendor sitting inside your identity pipeline, and it is worth keeping your data exportable through the API for that reason.

Editorial verdict

Knock2 is the best-structured product in the US person-level end of this category, and the structure is the reason to buy it. Every feature on every tier, month-to-month billing, an API and an MCP endpoint at $199, match rates published with an actual denominator, and buying-committee expansion that turns a single anonymous reader into a workable account. If your traffic is predominantly US and you already own a sequencer, this is the identification layer to try first, and the seven-day trial will tell you within a week whether the economics work on your site. If you sell into Europe, the headline capability is switched off and you should be looking at Snitcher or Leadinfo. And understand what you are buying either way: the people Knock2 names consented to a publisher, not to you, and the vendor has not published how a visitor opts out.

Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.