RB2B vs Warmly: B2B Website Visitor Identification Head-to-Head

Reading the result

The overall margin is four points. RB2B took three of six rounds (pricing transparency, US person-level identification, billing flexibility) and Warmly took the other three (global coverage, on-site engagement, integration breadth). Two of RB2B’s wins are structural: its Free ($0), Starter ($79), Pro ($149), and Pro+ ($199) tiers are published directly on the pricing page with monthly billing , and it doesn’t require a sales call to start. Warmly’s wins are all about product scope: it’s doing more of the inbound conversion job in one contract.

The decision reduces to what job the buyer is actually hiring the tool for.

How to map the rounds to a buying decision

If the team already owns a cold outreach platform, and most 5-to-30-person B2B teams evaluating visitor ID do, RB2B fits the “signal into an existing stack” pattern. RB2B documents 50+ native integrations including Slack, Microsoft Teams, HubSpot, Salesforce, Clay, Apollo, and Zapier, though integration access is gated by plan: Free is Slack-only, Starter adds LinkedIn URLs to Slack but excludes email addresses and other integrations, and only Pro and above unlock the full ecosystem. The practical starting plan for a real sales workflow is Pro at $149/month, because that’s where business email addresses and CRM sync appear.

Teams that don’t yet have that stack, no chatbot, no outreach platform, no orchestration, get more incremental value from Warmly, because the platform bundles all of it. Warmly’s product is structured around two autonomous agents: a TAM Agent for outbound (audience building, buying committee identification, coordinated email and ads) and an Inbound Agent for on-site conversion (person-level identification, AI chat with graph context, smart popups, personalized microsites, and retargeting across email and ads). That’s four to five tools folded into one contract, and it’s why the entry price is higher.

For teams building out the outbound side separately, our Apollo.io vs Instantly comparison covers the two most common follow-through platforms an RB2B-identified visitor gets pushed into, and the best AI website chatbots for lead capture ranking covers the on-site engagement layer that Warmly bundles natively.

On pricing transparency

This is the round where the gap is widest. RB2B’s pricing page publishes Free ($0/mo), Starter ($79/mo), Pro ($149/mo), and Pro+ ($199/mo) with the exact feature deltas next to each tier. Warmly’s public pricing page publishes three products with dollar amounts: AI Web-Deanonymization starting at $10,000/year ($4,875/quarter), Inbound Chat starting at $20,000/year ($6,500/quarter), and AI Inbound Autopilot starting at $30,000/year ($9,750/quarter), each with “From 10K credits / mo” and a “Talk To Sales” call-to-action. The Inbound Chat tier and above cover on-site person-level identification, AI chat, Warm Offers, chat metrics, and automated email follow-up.

The practical consequence for a small B2B team: RB2B is evaluable in an afternoon and Warmly still routes through sales. That’s a real difference at the 5-to-30-person size band, where head-of-sales evaluations rarely have room for a multi-week vendor cycle.

On match rate and where the signal actually comes from

Neither vendor publishes a lab-grade benchmark, and the two products define “match rate” differently, so treat this section as documentation-derived, not measured. Warmly’s use-case page describes person-level de-anonymization, real-time identification, revealed contact details (work email, job title, LinkedIn, phone), company enrichment, and layered intent signals, without publishing a single headline match-rate number on the fetched pages.

RB2B’s Pro subscription includes Basic Resolution, which combines company-level identification globally with contact-level identification primarily for US visitors; Pro+ upgrades to Premium Resolution, which adds a waterfall of trusted external data sources to expand both US and international identification, with higher overall match rates and deeper visibility across more traffic.

The important structural point: RB2B’s Person-Level Identity is US-only technology with a US-only database because of GDPR and CCPA compliance; the Company-Level ID, through a Demandbase partnership, is global. A team with meaningful non-US traffic will see the person-level pipeline effectively silent on that traffic. Warmly’s IP-plus-enrichment stack isn’t gated the same way.

On the engagement layer

This is where the two products stop looking like alternatives and start looking like different categories. Warmly’s model is that the moment a VP from a target account hits your pricing page, your best rep gets an alert and an AI chatbot starts the conversation, the pitch is converting inbound leads before they bounce. RB2B’s model stops one step earlier: it identifies the visitor and hands off. RB2B identifies the visitor but stops there; there’s no enrichment layer to tell you whether that visitor’s company is hiring, recently funded, or showing buying signals elsewhere, and there’s no automated outreach; a rep still has to manually craft a connection request or email.

For teams that already have a strong outbound motion and a fast SDR follow-up cadence, that handoff is fine and cheap. For teams whose sales cycle depends on catching an interested buyer inside the same session, the handoff loses the moment.

On integrations and ad orchestration

The integration surface diverges around ads. Warmly’s pricing page documents CRM sync, Slack alerts, lead routing, SEP/webhook integrations, and retargeting via email, LinkedIn, and ads on every tier from AI Web-Deanonymization up. RB2B’s integrations are focused on getting the signal into the sales stack (Slack, Teams, HubSpot, Salesforce, Clay, Apollo, Zapier), with LinkedIn ad orchestration living outside the product. A team that wants to auto-sync identified buying-committee members into LinkedIn ad audiences is running Warmly, not RB2B.

On trust and compliance

Both vendors publish trust signals. RB2B holds SOC 2 Type II certification, with documents available in its trust portal under parent company Retention.com. Warmly documents GDPR compliance on its site. The active compliance risk in the US visitor-ID category isn’t the vendor’s certification, though, it’s the customer’s. The active US risk in 2026 is state wiretapping and session-tracking litigation, including claims under the California Invasion of Privacy Act, alongside state privacy statutes; a privacy policy disclosure, a properly configured consent banner, honouring global privacy control signals, and geographic gating should be reviewed by counsel before deploying the pixel. That review is owed regardless of which product wins the evaluation.

Where each is the wrong choice

RB2B is the wrong choice for a team with mostly non-US traffic, a team whose ICP isn’t well-represented on LinkedIn, or a team that needs the tool to also engage the visitor. The Starter plan at $79/month is genuinely awkward: it delivers LinkedIn URLs to Slack but no business emails and no non-Slack integrations, which forces manual outreach and slows the loop.

Warmly is the wrong choice for a team with under a few thousand monthly B2B sessions, where the identified-visitor volume simply doesn’t justify a five-figure annual contract, and for teams that already own a chat, dialer, and outreach stack and don’t want to replace it. The consolidation pitch only pays when there’s something to consolidate.

For teams still deciding whether visitor identification is the right lead-gen investment at all, our best AI lead discovery platforms for small B2B businesses ranking covers the broader category, and the best AI SDR and autonomous outbound platforms ranking covers what to plug either of these into on the outbound side.