RB2B vs Warmly (2026)
Putting a name on an anonymous website visit is the common ground here; the decision is what happens next. RB2B sends the person, their title, company, LinkedIn profile and the pages they read to Slack or Teams, and on its Pro plans pushes the same record into HubSpot, Salesforce, Clay or Apollo with a business email attached. A salesperson or the customer's own workflow takes it from there. Warmly keeps the visitor on the page: an AI chat agent or a live rep opens a conversation, books the meeting, follows up by email and retargets through LinkedIn ads, and a separate agent works accounts that never visited. The price gap follows that scope. RB2B runs from a free company plan to $79 a month for person identification and from $149 for emails and integrations, all bought online. Warmly starts at $10,000 a year for identification alone and $20,000 with chat, bought through sales. Person level matching in RB2B covers US visitors only.
- The sales team already works leads from Slack or Teams and wants named visitors delivered there within minutes, starting at $79 a month.
- A business email and a CRM record are enough, with HubSpot, Salesforce, Clay or Apollo picking up the visitor on the Pro plan.
- The buyer wants to try before paying: a free company plan runs indefinitely and every feature can be tested for seven days without a card.
- The visitor should be engaged on the page by an AI chat agent or a live rep, with the meeting booked before they leave.
- Accounts that never visited should be worked too, through Bombora intent, job changes, funding signals and outbound and nurture campaigns.
- Retargeting through email and LinkedIn ads and personalized landing pages should come from the same platform that identified the visitor.
This comparison is published by GTM Tech Index, an independent research platform that compares go to market software vendors objectively. RB2B and Warmly are each graded against the same capability taxonomy, from each vendor's own public materials, under the GTM Tech Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| RB2B | Warmly | |
|---|---|---|
| Primary category | Intent & Signals | Intent & Signals |
| Founded | 2024 | 2020 |
| Headquarters | Austin, Texas, United States | San Francisco, California, United States |
| Website | www.rb2b.com | www.warmly.ai |
Side by Side
| Axis | R RB2B |
W Warmly |
|---|---|---|
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AI Capability
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| AI Centrality | ||
| Autonomy and Oversight Model | ||
| AI Disclosure and Model Transparency | ||
| Operational and Outcome Evidence | ||
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Compliance and Risk
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| Outreach Compliance Posture | ||
| Data Privacy Posture | ||
| Data Licensing and Provenance | ||
| Platform Terms Exposure | ||
| AI Safety and Data Stewardship | ||
| Recipient Disclosure and Authenticity | ||
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Integration and Deployment
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| Ecosystem and Integration Depth | ||
| Deployment Model and Data Residency | ||
| Security Certifications and Trust Center | ||
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Commercial and Operational
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| Commercial Transparency | ||
| Exit and Data Portability | ||
| Deliverability and Sending Discipline | ||
| Segment and Market Coverage | ||
The short version of each
RB2B
RB2B is a visitor identification feed for teams that already have a way to act on a name. Its script resolves visitors against Retention.com's identity graph and posts each person's name, title, company, LinkedIn profile and pages viewed to Slack or Teams. Starter at $79 a month covers 300 people with no emails or other integrations; Pro from $149 adds business emails, Hot Leads filtering, exclusions by domain or URL and connectors to HubSpot, Salesforce, Clay, Apollo and webhooks, and Pro+ from $199 lifts the stated match coverage from 15 to 20% of traffic to 35 to 45%. Person level identification is limited to US visitors. The GTM Tech Index grades it A on commercial transparency, because every plan, volume step and overage rate is published, and B on privacy posture, backed by a published addendum and a consumer opt out.
Source: GTM Tech Index, 2026
Warmly
Warmly is built to act during the visit. It identifies the person and the company behind site traffic, then its Inbound Agent alerts a rep, routes the lead, opens an AI chat or a live human chat, books the meeting and retargets the visitor through email and LinkedIn ads. A TAM Agent reaches accounts that have not visited, using Bombora research intent, job changes, hiring and funding signals, buying committee mapping and outbound sequences, all drawn from one context graph that Warmly says covers more than 220 million people. Plans start at $10,000 a year for identification, $20,000 with chat and $30,000 for the autopilot, each with 10,000 credits a month. The GTM Tech Index grades it B on AI centrality, since agents carry the core workflow, and D on recipient disclosure, as nothing published says whether its chat agent tells a visitor it is software.
Source: GTM Tech Index, 2026
Common questions
Does RB2B or Warmly identify more of my website visitors?
RB2B publishes its own coverage: 15 to 20% of traffic on Free, Starter and Pro, and 35 to 45% on Pro+, with individuals named only for US visitors and companies worldwide. Warmly publishes no match rate; it describes verification waterfalls across more than 15 data vendors and 95% deliverability on the emails it verifies. Neither says how often a match names the wrong person. On operational and outcome evidence the GTM Tech Index places RB2B and Warmly at C, because their results are headline figures without a stated test population.
What do RB2B and Warmly cost per year for a small team?
RB2B Starter is $79 a month, about $948 a year, for 300 identified people a month in Slack or Teams. Pro with business emails and CRM integrations starts at $149 a month, about $1,788 a year. Warmly's identification plan starts at $10,000 a year or $4,875 a quarter, and adding AI chat starts at $20,000 a year. The GTM Tech Index scores RB2B A on commercial transparency and Warmly C, since Warmly's figures are starting points and its 10,000 monthly credits come with no definition of what a credit buys.
Which tool can start a conversation with a visitor while they are still on the site?
Warmly. Its AI chatbot, live human chat, smart popups, personalized landing pages and an AI call agent all engage the visitor during the session, and an AI video chat agent is sold as an add on. RB2B never contacts the visitor; it delivers the identification to a person or, on Pro, to a tool such as Apollo, Zapier or a webhook that the customer configures to act on it. Graded by GTM Tech Index against seventeen capability axes from each vendor's own published materials, verified October 13, 2026. No vendor pays for placement.
Do RB2B and Warmly identify visitors from Europe?
RB2B names individuals only for US traffic, because its identity database holds people matched to US home addresses, and identifies companies elsewhere. Warmly publishes no geographic limit for person identification; its privacy policy carries a notice for the European Economic Area, the UK and Switzerland and says data is processed and stored in the United States. On data privacy posture the GTM Tech Index puts RB2B at B, with a published addendum, subprocessor list and consumer opt out, and Warmly at C.
Which works better with HubSpot or Salesforce, RB2B or Warmly?
Warmly includes CRM sync, lead routing and sales engagement and webhook integrations on its entry plan, with more than 40 integrations, an API and MCP. RB2B connects to HubSpot and Salesforce from the Pro plan up, alongside Clay, Apollo, Zapier, webhooks and CSV export; Starter sends to Slack or Teams only. The GTM Tech Index rates Warmly B and RB2B C on ecosystem and integration depth, as RB2B lists its connectors without documenting sync behavior.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Intent & Signals page.
RB2B's identity data comes from Retention.com, its parent company. The coverage ranges RB2B quotes and the pipeline and acquisition cost results Warmly quotes are each vendor's own figures, and neither vendor publishes how often a named visitor turns out to be the wrong person.