RB2B vs Warmly: Which Person-Level Visitor ID Fits Your Team?

What is the difference between RB2B and Warmly?

RB2B and Warmly both say they identify website visitors at the person level, but their public pages describe different scope and different jobs after identification. RB2B describes a US-only person-level database, self-serve monthly pricing from $79 for person-level data, and a workflow that ends in a Slack, Teams, or CRM alert. Warmly describes person-level de-anonymization with no stated geographic limit, priced as annual or quarterly contracts starting at $10,000/year, built around AI chat, retargeting, and outbound orchestration rather than an alert feed alone. Neither vendor's pages prove which one identifies more of your traffic, or more accurately.

Decision point	RB2B (RB2B pages, 2026-09-26)	Warmly (Warmly pages, 2026-09-26)
Positioning	Identify named visitors and push them to Slack, Teams, and your CRM.	De-anonymize visitors, then run AI chat, retargeting, and outbound from the signal.
Person-level scope	US-only, by the vendor's own statement; global company-level via Demandbase.	No US-only statement found; the vendor's database claims 30M+ companies across 150+ countries, but that is a database-size claim, not a stated identification-coverage claim.
Entry price	Free tier (company-level only); $79/mo Starter for person-level.	No free tier; the lowest published tier starts at $10,000/year, or $4,875/quarter.
What happens after ID	Slack/Teams alert plus CRM push; outbound automation through partner integrations (Instantly, Smartlead, HeyReach).	Built-in AI chatbot, smart popups, live-chat routing, meeting booking, ad retargeting, and AI call agents, in addition to alerts and CRM sync.
Buying motion	Self-serve monthly plans.	Annual or quarterly contracts; no monthly self-serve plan is published.

If your team wants a fuller read of RB2B's current free-tier limits before comparing it to anything else, read what changed in RB2B's 2026 free plan first. This page stays at the RB2B-vs-Warmly level and turns every difference into something you can verify in a trial.

How do RB2B and Warmly identify visitors, and where?

RB2B's homepage says it can "Identify 70-80% of your web traffic - both people and companies" — a vendor claim, not a measured benchmark. Its FAQ is specific about geography: "Person-Level Identity is a US-only technology with a US-only database," and the compliance page adds it "use[s] IP ringfencing to only resolve US traffic." Company-level identification, via a Demandbase partnership, "IS global," per the FAQ.

Warmly's homepage states its AI "de-anonymizes website visitors at the person level" but does not say whether that identification is US-only or global. Its data page claims a proprietary contact database — "220M+ professional contacts" and "30M+ companies" across "150+ countries" — with quality figures like "95%+" email deliverability and "95%+" company match. Those describe Warmly's underlying contact data, not a measured share of your website traffic that gets identified.

Two rules follow: treat both percentages as vendor claims about their systems in general, not your site, and measure your own usable rate with the match-rate calculator. RB2B states a geographic limit for person-level ID; Warmly's pages do not — if your traffic is meaningfully non-US, ask Warmly directly what it covers there.

How do RB2B and Warmly price their plans?

RB2B publishes four self-serve monthly tiers: Free ($0, company-level only, 150 monthly resolutions, no person-level ID or other integrations), Starter ($79/mo, adds LinkedIn URLs, 300 resolutions), Pro (from $149/mo, adds business email addresses and "all other integrations," 600-2,500 resolutions), and Pro+ (from $199/mo, "premium resolution" business emails, 600-2,500,000 resolutions). Overage runs 45 cents per resolution on Starter and 25 cents on Pro and Pro+; extra domains cost $99/mo (up to 5) on Pro and Pro+. The same page lists US contact-level coverage of "15-20%" on Starter and Pro and "35-45%" on Pro+, and the same ranges for global company-level ID (15-20% on Free through Pro): vendor-published figures to verify on your own traffic.

Warmly publishes three tiers, sold as annual or quarterly contracts rather than self-serve billing: AI Web-Deanonymization (starting at $10,000/year, or $4,875/quarter), Inbound Chat (starting at $20,000/year, or $6,500/quarter), and AI Inbound Autopilot (starting at $30,000/year, or $9,750/quarter, marked most popular). The page says annual billing saves 30%; at the published quarterly prices, a year of the entry tier on quarterly terms is 4 × $4,875 = $19,500. Every tier starts "From 10K credits/mo." The entry tier includes visitor identification, ICP filtering, alerts, lead routing, CRM sync, webhook integrations, and ad retargeting; higher tiers add AI chat and automation. No free tier is published.

Compare cost per usable contact, not sticker price. For RB2B, check whether your traffic fits a tier's resolution limit before overage applies. For Warmly, check whether the 10K-credit baseline and included features match what you will use. At list prices, RB2B's Pro+ plan at its starting price costs $2,388 a year; Warmly's entry tier starts at $10,000 a year, and it includes retargeting by email, LinkedIn and ads, which RB2B leaves to partner tools.

What happens after a visitor is identified, and which integrations carry it?

RB2B's model ends the identification step in an alert and a data push: visitors "start coming through your Slack channel in minutes," plus CRM integration with Salesforce and HubSpot. Outbound automation runs through named partner integrations rather than a built-in feature: Clay for enrichment and messaging, Instantly and Smartlead for email sequencing, HeyReach for LinkedIn sequencing, Zapier and a generic webhook for everything else, plus an unitemized "50+ more apps" claim.

Warmly treats identification as the first step of an engagement flow it runs itself: AI chatbot conversations, personalized landing pages and smart popups, live human-chat routing, meeting-booking automation, real-time alerts, and email/LinkedIn/Meta ad retargeting, with higher tiers adding "Unlimited AI Studio Agents," auto-qualification, and auto-generated follow-up email. Its named integrations run much longer than RB2B's: CRM (HubSpot, Salesforce/Pardot, Pipedrive, Zoho, Microsoft Dynamics 365, and others), marketing automation (Marketo, Eloqua, ActiveCampaign, Klaviyo), outbound tools (Outreach, SalesLoft, Apollo), ad platforms (LinkedIn, Google Ads, Meta), ABM/intent platforms (6sense, Demandbase, Bombora, Clearbit), and AI assistants (ChatGPT, Claude, Gemini).

The practical question: do you want a signal delivered to people who decide what to do next, or a system that also acts on it? RB2B's pages describe the first; Warmly's describe the second, bundled into the price. Either way, a long integration list is not proof of a clean field map — ask both vendors for the exact object, field, and dedupe behavior for the one CRM and alert channel you will actually use.

What do RB2B and Warmly say about data and compliance?

Asked whether GDPR applies, RB2B's compliance page answers "No," because "our database of personal information only contains profiles that have been matched to US home addresses, and we use IP ringfencing to only resolve US traffic." It says US state privacy laws such as the CCPA/CPRA may apply, suggests disclosure language, and links an opt-out page. Its homepage claims SOC 2 Type II. For the global company-level ID that runs through Demandbase, RB2B's homepage says consent capture is required to comply with GDPR, so EU and UK visitors need a consent tool in front of it.

Warmly's Trust Center lists GDPR, CCPA, SOC 2, and EU Data Act as its compliance framework, and hosts on Google Cloud Platform and Firebase. Its Privacy Policy names Warmly the data controller for European-law purposes over its own platform data, covers the EEA, UK, and Switzerland, and reports 768 deletion requests handled in 2025. The Trust Center's detailed policy documents sit behind access controls, so the underlying DPA text and subprocessor list were not independently confirmed here. Warmly's DPA and subprocessor list were not publicly readable on 2026-09-26; request them.

Neither statement is a legal conclusion. If either tool will touch EU, UK, or California residents, send both vendors' current DPA and subprocessor documents to your privacy or legal owner — see the vendor DPA comparison for a starting question list.

Which team motion fits RB2B, and which fits Warmly?

RB2B fits a team that wants named-visitor alerts in Slack or Teams and a CRM record without a broader engagement platform, has mostly US traffic, wants a free or low-cost self-serve tier, and already has outbound tooling that only needs the identification signal fed in.

Warmly fits a team that wants identification and engagement in one contract — chat, retargeting, meeting booking, and alerts together — is prepared for an annual or quarterly commitment, and wants an AI-driven inbound motion that acts on a signal immediately rather than just alerting a rep.

Neither fits a team that has traffic mostly outside the US and needs a verified non-US coverage claim (RB2B rules it out by design; Warmly's pages do not commit to a scope), cannot yet name who owns CRM field mapping and alert-copy review, or needs a signed DPA before any pilot starts and cannot get Warmly's actual documents beyond the Trust Center summary.

A worked example (hypothetical)

A US-based B2B software company gets 20,000 monthly website sessions from about 8,000 unique visitors, almost all in the US, and wants sales to follow up on named prospects who view the pricing page.

The RevOps lead first asks whether the team needs an alert or an engagement flow. Today the answer is an alert: reps already run their own outbound sequences, and no one is ready to let an AI agent message a prospect automatically. That points toward RB2B. For a rough tier estimate, the lead applies RB2B's published 15-20% contact-level figure to the site's 8,000 monthly US unique visitors: 1,200-1,600 resolutions a month. That needs Pro's 2,500-resolution option, which is priced above the $149 starting price; RB2B's pricing page does not say whether company-level resolutions count against the same limit, so the team asks. The pilot will show the real number. The team pilots Pro for one quarter, connects Slack and Salesforce, and measures usable records against its own CRM data before deciding whether to upgrade.

A different, hypothetical fork: the same company's marketing lead wants AI chat and instant meeting booking on pricing-page visitors instead of a manual queue — a different job than RB2B was scoped for. The lead requests a Warmly demo, asks for the entry-tier feature list, and asks directly whether Warmly's identification coverage is US-only or global before assuming either answer. Both forks start from the same traffic; the difference is the workflow the team is ready to run, not which vendor claims a higher percentage.

What should you verify in a trial before buying?

Ask RB2B and Warmly the same questions, and get the answer in writing before either tool gets production CRM or alert access.

1. What exact evidence does the tool return for an anonymous visit — company-level, person-level, or both — and how is that evidence labeled?
2. Which fields are observed, inferred, matched by a data partner (Demandbase for RB2B; the unnamed vendors in what Warmly calls its multi-vendor waterfalls), or purchased from a third-party database?
3. What is the identification coverage for your actual traffic, not the vendor's general claim? Ask for a sample from your own site, not a case study.
4. Which CRM objects and fields can the tool create or update, and what dedupe rule prevents duplicate leads?
5. For Warmly: which orchestration features (AI chat, retargeting, meeting booking) are on by default, and who reviews the message copy before it reaches a prospect?
6. For RB2B: which partner integration would carry outbound messaging, and who owns that copy?
7. What data-processing and deletion terms apply, and can you get the current DPA and subprocessor list directly, not a marketing summary?
8. What is the full cost at your traffic volume, including overage (RB2B) or credit limits (Warmly), for a full year?
9. What is the cancellation or downgrade path if the pilot does not produce enough usable records?

The longer, vendor-neutral version is the 32-question vendor due-diligence checklist. Run it on whichever vendor you shortlist before production access.

When should you choose neither yet?

Pause the purchase or trial if the next action needs more certainty than either vendor's pages document:

• Sales wants to message named people based only on anonymous account activity, before consent or opt-out review is complete.
• Your traffic is meaningfully outside the US and neither vendor will confirm, in writing, what its person-level product covers there.
• No one owns CRM field mapping, alert-copy review, or a rollback plan.
• The business case depends on RB2B's 70-80% figure or Warmly's data-quality percentages instead of your own measured sample.
• Warmly's automated chat, retargeting, or call-agent features would go live before anyone has reviewed what they say to a prospect.
• Privacy or legal review of the current DPA and subprocessor list is incomplete — for Warmly, that means requesting the actual documents, not just the Trust Center summary.

If any of those is true, use the build-vs-buy worksheet to decide whether to buy at all.

Claim ledger

Claim used in this guide	Source boundary	Review rule
RB2B claims 70-80% traffic identification, is US-only for person-level ID, and global for company-level ID via Demandbase.	RB2B homepage and compliance page, fetched 2026-09-26.	Treat the percentage as a vendor claim; re-verify geographic scope before quoting.
RB2B publishes four self-serve tiers ($0, $79, from $149 and from $199 per month) with stated resolution limits, overage rates, and 15-20% or 35-45% coverage ranges by tier.	RB2B pricing page, fetched 2026-09-26.	Plan terms change; re-check before quoting a price or limit.
Warmly's homepage says it de-anonymizes visitors at the person level and lists AI chat, retargeting, and outbound features; its pages do not state a US-only or global scope for that identification.	Warmly homepage, fetched 2026-09-26.	Do not assume global coverage; ask the vendor directly.
Warmly publishes three annual/quarterly tiers (starting at $10,000, $20,000 and $30,000 per year, or $4,875, $6,500 and $9,750 per quarter) with a 10K-credit baseline and no free tier.	Warmly pricing page, fetched 2026-09-26.	Contract terms and credit definitions change; re-check before quoting.
Warmly's data-page claims (220M+ contacts, 30M+ companies across 150+ countries, deliverability/accuracy percentages) describe its contact database, not a measured on-site identification rate.	Warmly data page, fetched 2026-09-26.	Never conflate database size or quality claims with a website match rate.
Warmly's Trust Center lists GDPR, CCPA, SOC 2, and EU Data Act as compliance claims, but its DPA and subprocessor list were not independently confirmed here.	Warmly Trust Center and Privacy Policy, fetched 2026-09-26.	Request the actual DPA and subprocessor documents before signing.
No winner, match-rate comparison, or ROI figure is claimed for either vendor.	Not used.	Add only with current primary-source or first-party measurement proof.

FAQ

Is RB2B better than Warmly?

Public pages do not prove that. They support a comparison of scope and workflow — a US-only, alert-and-CRM tool from RB2B versus a broader identification-plus-engagement platform from Warmly — but not a winner. Compare the proof each vendor gives for your traffic, CRM, and the workflow you are ready to run.

Does Warmly identify visitors outside the US?

Warmly's pages, as read on 2026-09-26, do not state a geographic limit or a non-US coverage figure for person-level website identification. Its "150+ countries" claim describes the reach of its contact and company database, not a confirmed identification rate on international traffic. Ask Warmly directly before assuming either way.

Is RB2B cheaper than Warmly?

RB2B's entry price ($0 company-level, $79/mo person-level) is far below Warmly's lowest published tier (starting at $10,000/year). That reflects different products: RB2B sells an identification-and-alert feed, while Warmly bundles identification with AI chat, retargeting, and outbound automation. Compare cost per usable record, not sticker price.

Can RB2B do the same outbound automation as Warmly?

Not natively. RB2B routes outbound automation through partner tools — Clay, Instantly, Smartlead, HeyReach — rather than running it inside RB2B. Warmly describes AI chat, retargeting, and sequencing as built into its own platform.

What is the safest way to compare their compliance claims?

Request each vendor's current DPA and subprocessor list directly rather than trusting marketing pages. RB2B publishes an opt-out page and explains why it says GDPR does not apply to its US-only person-level product. Warmly's Trust Center lists a compliance framework, but its underlying documents were not independently confirmed for this guide. Send both vendors' actual documents to your privacy or legal owner.

What should we do after this comparison?

Shortlist the proof requests from the trial checklist above, then run the vendor due-diligence checklist before giving either tool production access, and measure each tool on your own traffic with the match-rate calculator instead of relying on either vendor's published percentages.