Warmly and RB2B both start at the same place — a JavaScript snippet that resolves anonymous website visitors to real companies and, on the right tier, real people — and then diverge hard on what they do with the signal. RB2B is a point tool: it identifies US visitors at the person level, pushes the name, work email, company, and role into Slack and your CRM, and stops there. You bring the outbound motion. Warmly treats identification as the front door to a platform — it adds Bombora intent scoring, an AI chatbot, live “Warm Call” video with a visitor while they’re still on the page, and Autopilot agents that qualify and book. RB2B sells you the signal; Warmly sells you the signal plus the machine that acts on it.
That difference sets the whole decision, and it is mostly a question of price and team shape. RB2B’s paid plans run $79–199/month; Warmly’s entry deanonymization tier is $10,000/year and the full agent suite is $30,000/year — call it a 4x gap at the floor and 12x once you turn on chat and Autopilot. So the buy comes down to: do you want cheap person-level US data that you’ll work with your own SDRs and sequencer, or do you want identification, intent, live engagement, and automated plays in one platform and will you pay for the consolidation? If you have an SDR who can act on a Slack alert and you already run Outreach or Clay, RB2B is the argument. If you have in-ICP inbound traffic, no appetite for stitching three tools together, and someone who will actually use the live-chat and Autopilot layer, Warmly is.
Where RB2B wins
Person-level US identification at a point-tool price. RB2B’s Pro+ at $199/month resolves visitors to the contact level (name, work email, role) on roughly 35–45% of US traffic, pushed straight to Slack. To get person-level deanonymization out of Warmly you’re at the $10,000/year floor — RB2B delivers the same core signal for under $2,400/year.
Nothing to adopt past the Slack channel. The entire product is “identified person lands in Slack and your CRM.” There’s no chatbot to configure, no Autopilot to train, no credit model to model out. A two-person growth team is live in an afternoon and works the signal with the sequencer they already own.
Free and Starter tiers to prove the data first. Free ($0, 150 resolutions/month) and Starter ($79/month, 300 resolutions) let you measure match rate on your own traffic before committing. Note the change: the free tier is now company-level only — person-level identification starts at the paid tiers, and full contact-level resolution is the Pro+ feature.
Where Warmly wins
Identification, intent, and action in one platform. Warmly does visitor ID, Bombora intent scoring, CRM sync, and automated email/LinkedIn outreach inside one tool, so the signal-to-play loop doesn’t cross three vendors. The RB2B equivalent is RB2B plus an intent feed plus a sequencer plus the glue between them.
Live engagement while the visitor is still on the page. The Warm Call feature opens a video or chat session with a target-account visitor in real time. That’s a motion RB2B structurally can’t run — RB2B hands you a name after the visit; Warmly lets a rep act during it.
Agents cover the qualification work a lean team can’t staff. The Autopilot and TAM agents score the addressable market, identify the buying committee, and draft follow-up. For an SMB team with no SDR bench, that automated layer is the reason to pay 12x over RB2B rather than hire.
Pricing reality
RB2B publishes four tiers: Free ($0, 150 resolutions/month, company-level only), Starter ($79/month, 300 resolutions, LinkedIn URLs, no email), Pro ($149/month, 600–2,500 resolutions with business email, $0.25/resolution overage), and Pro+ ($199/month, contact-level US resolution at 35–45% coverage plus company-level global). A resolution is a single visitor identified within a 30-day window; credits reset each cycle and don’t roll over. Extra domains are $99/month. A high-traffic site on Pro+ with overage lands in the low-four-figures-per-month range, but the entry economics are friendly.
Warmly repriced to an annual-first model: AI Web-Deanonymization at $10,000/year (10K credits/month), Inbound Chat at $20,000/year (adds the AI chatbot, live chat, and email follow-up), and AI Inbound Autopilot at $30,000/year (unlimited agents plus goal-setting and auto-booking). The AI TAM Agent is a separate $15,000/year for 60K annual credits. Quarterly billing carries a ~30% premium — the entry tier is $4,875/quarter. The free plan deanonymizes up to 500 visitors/month at the company level, enough to test data quality, not to run a motion. There is no tier between free and $10K.
Match them on the unit that matters — cost to get a person-level US identification you can act on. RB2B Pro+ is ~$2,400/year for that. Warmly’s floor for person-level deanonymization is $10,000/year, and that floor buys you the routing and intent layer but not the chat or Autopilot you’re really paying Warmly for. The honest comparison isn’t $199 vs $10K on identification alone; it’s “$199/month for the signal, wire your own outbound” against “$20–30K/year for the signal plus the engagement and automation machine.” Decide whether you’ll use the machine before you pay for it.
Implementation and risk
The risks the two share come from the same mechanism. Both run probabilistic, not deterministic, identity resolution, so a quoted coverage rate is a category average, not a promise on your traffic — run RB2B’s free or Starter tier and Warmly’s free plan on your real visitors for a month and count in-ICP identified contacts before signing anything. Both also carry person-level privacy exposure: GDPR and US state laws (CA, VA, CO, CT) restrict identifying people without consent, so restrict either snippet to US traffic, wire identified visitors into your standard cold-outbound suppression and consent path, and review handling with privacy counsel. And on both, the spend only converts to pipeline if someone actually works the signal fast — identification data nobody actions is wasted budget on either tool.
The tool-specific risks point in opposite directions. With RB2B, the recent move of person-level data behind the paid tiers means the old “free person-level reveal” pitch no longer holds — budget for at least Starter, and Pro+ if contact-level email is the point. With Warmly, the annual commit is the trap: $10K–30K/year is real money against a 15–25% match rate, so prove during the free pilot both that the rate clears your ICP and that your team will use Warm Calls and Autopilot, not just the Slack alerts you could have gotten from RB2B for a fraction. Credit metering on Warmly also draws down on enrichment and retargeting, not just identification — model the burn against your traffic before committing.
Verdict
Pick RB2B when you want name-and-email of US visitors at a point-tool price, you already run outbound through Outreach, Salesloft, or Clay, and you have an SDR who works a Slack channel. It fits SMB and mid-market teams that want the signal and will own the motion — $79–199/month, live in an afternoon.
Pick Warmly when you want identification, Bombora intent, AI chat, live Warm Calls, and Autopilot agents in one platform, you have enough in-ICP inbound traffic to clear a $10K+/year floor, and you’ll actually use the live-engagement and automation layer instead of just the alerts. It trades point-tool economics for a consolidated signal-to-booking machine.
Pick neither if inbound forms already capture most of your ICP visits — then a deanonymization layer is paying to identify people who would have raised their hand anyway. For enterprise ABM where the account is the unit of work and deep third-party intent matters more than person-level reveal, 6sense or Demandbase fit better than either. For EU traffic, Clay with an EU-aware company-level feed is the safer build.
Default pick: RB2B. For most teams choosing specifically between these two, start with the cheaper tool that proves the signal — RB2B gives you person-level US identification for under $2,400/year, and if your team works it well you’ve validated the motion before spending 5–12x more. Move up to Warmly when you’ve confirmed the traffic volume and the live-engagement motion justify the platform, not before. For the full reasoning on each, see Warmly and RB2B on their own.
Warmly and RB2B both start at the same place — a JavaScript snippet that resolves anonymous website visitors to real companies and, on the right tier, real people — and then diverge hard on what they do with the signal. RB2B is a point tool: it identifies US visitors at the person level, pushes the name, work email, company, and role into Slack and your CRM, and stops there. You bring the outbound motion. Warmly treats identification as the front door to a platform — it adds Bombora intent scoring, an AI chatbot, live “Warm Call” video with a visitor while they’re still on the page, and Autopilot agents that qualify and book. RB2B sells you the signal; Warmly sells you the signal plus the machine that acts on it.
That difference sets the whole decision, and it is mostly a question of price and team shape. RB2B’s paid plans run $79–199/month; Warmly’s entry deanonymization tier is $10,000/year and the full agent suite is $30,000/year — call it a 4x gap at the floor and 12x once you turn on chat and Autopilot. So the buy comes down to: do you want cheap person-level US data that you’ll work with your own SDRs and sequencer, or do you want identification, intent, live engagement, and automated plays in one platform and will you pay for the consolidation? If you have an SDR who can act on a Slack alert and you already run Outreach or Clay, RB2B is the argument. If you have in-ICP inbound traffic, no appetite for stitching three tools together, and someone who will actually use the live-chat and Autopilot layer, Warmly is.
Where RB2B wins
Where Warmly wins
Pricing reality
RB2B publishes four tiers: Free ($0, 150 resolutions/month, company-level only), Starter ($79/month, 300 resolutions, LinkedIn URLs, no email), Pro ($149/month, 600–2,500 resolutions with business email, $0.25/resolution overage), and Pro+ ($199/month, contact-level US resolution at 35–45% coverage plus company-level global). A resolution is a single visitor identified within a 30-day window; credits reset each cycle and don’t roll over. Extra domains are $99/month. A high-traffic site on Pro+ with overage lands in the low-four-figures-per-month range, but the entry economics are friendly.
Warmly repriced to an annual-first model: AI Web-Deanonymization at $10,000/year (10K credits/month), Inbound Chat at $20,000/year (adds the AI chatbot, live chat, and email follow-up), and AI Inbound Autopilot at $30,000/year (unlimited agents plus goal-setting and auto-booking). The AI TAM Agent is a separate $15,000/year for 60K annual credits. Quarterly billing carries a ~30% premium — the entry tier is $4,875/quarter. The free plan deanonymizes up to 500 visitors/month at the company level, enough to test data quality, not to run a motion. There is no tier between free and $10K.
Match them on the unit that matters — cost to get a person-level US identification you can act on. RB2B Pro+ is ~$2,400/year for that. Warmly’s floor for person-level deanonymization is $10,000/year, and that floor buys you the routing and intent layer but not the chat or Autopilot you’re really paying Warmly for. The honest comparison isn’t $199 vs $10K on identification alone; it’s “$199/month for the signal, wire your own outbound” against “$20–30K/year for the signal plus the engagement and automation machine.” Decide whether you’ll use the machine before you pay for it.
Implementation and risk
The risks the two share come from the same mechanism. Both run probabilistic, not deterministic, identity resolution, so a quoted coverage rate is a category average, not a promise on your traffic — run RB2B’s free or Starter tier and Warmly’s free plan on your real visitors for a month and count in-ICP identified contacts before signing anything. Both also carry person-level privacy exposure: GDPR and US state laws (CA, VA, CO, CT) restrict identifying people without consent, so restrict either snippet to US traffic, wire identified visitors into your standard cold-outbound suppression and consent path, and review handling with privacy counsel. And on both, the spend only converts to pipeline if someone actually works the signal fast — identification data nobody actions is wasted budget on either tool.
The tool-specific risks point in opposite directions. With RB2B, the recent move of person-level data behind the paid tiers means the old “free person-level reveal” pitch no longer holds — budget for at least Starter, and Pro+ if contact-level email is the point. With Warmly, the annual commit is the trap: $10K–30K/year is real money against a 15–25% match rate, so prove during the free pilot both that the rate clears your ICP and that your team will use Warm Calls and Autopilot, not just the Slack alerts you could have gotten from RB2B for a fraction. Credit metering on Warmly also draws down on enrichment and retargeting, not just identification — model the burn against your traffic before committing.
Verdict
Default pick: RB2B. For most teams choosing specifically between these two, start with the cheaper tool that proves the signal — RB2B gives you person-level US identification for under $2,400/year, and if your team works it well you’ve validated the motion before spending 5–12x more. Move up to Warmly when you’ve confirmed the traffic volume and the live-engagement motion justify the platform, not before. For the full reasoning on each, see Warmly and RB2B on their own.