RB2B and Clearbit both promise to tell you who’s on your website — but they answer two very different questions. RB2B tries to name the individual person. Clearbit (now Breeze, inside HubSpot) tells you the company. One is person-level, one is company-level, and confusing them will cost you either wasted outreach or missed people.
If you’re deciding between them, the real question isn’t “which is better” — it’s “which layer of the buyer do I need to see, and how much wrong data can I tolerate?”
This is a practical, opinionated breakdown of RB2B vs Clearbit: what each actually identifies, how their methods differ, where accuracy breaks down, and where a deterministic alternative fits for teams that plan to act on the data.
RB2B vs Clearbit at a glance
| RB2B | Clearbit (Breeze) | |
|---|---|---|
| Identifies | Individual person | Company / account |
| Level | Person-level | Company-level (Reveal) + enrichment |
| Primary method | Probabilistic | IP + probabilistic |
| Geography | US-focused | Global company data |
| Delivery | Slack-first alerts | HubSpot-native / API |
| Free tier | Yes (limited) | Bundled into HubSpot |
| Best for | US person-level alerts | Enrichment inside HubSpot |
The headline: these tools aren’t really competitors so much as two different jobs. Below, what each does well — and where each leaves you exposed.
What RB2B actually does
RB2B built its reputation on one sharp promise: push the name and LinkedIn of an individual US visitor into your Slack, for free at the entry tier. For a lot of teams, that Slack alert was their first taste of person-level identification, and the free plan drove fast adoption.
What to know before you rely on it:
- It’s person-level and US-only. RB2B focuses on identifying individual visitors in the United States. Outside the US, it doesn’t deliver the same experience.
- It’s probabilistic. RB2B infers identity from signals rather than confirming it against verified records. That means a share of the names it surfaces will be wrong — and it doesn’t hand you a confidence score to tell which.
- Slack-first workflow. The core experience is a stream of alerts. Great for immediacy, but a firehose without filtering, and heavier CRM automation takes more setup.
For a deeper look at strengths and limits, see our RB2B review and the roundup of RB2B alternatives.
What Clearbit (Breeze) actually does
Clearbit was always more of a data and enrichment company than a person-level visitor tool. After the HubSpot acquisition it became Breeze Intelligence, folded directly into the HubSpot platform.
Its two relevant capabilities:
- Enrichment. Given an email or domain, Clearbit fills in firmographic and contact fields — industry, size, role, tech stack. This is its genuine strength.
- Reveal (company-level identification). Clearbit maps a visitor’s IP to a company, so you learn which organization is on your site — not which person.
The critical limitation for anyone hoping to do outreach: Clearbit’s website identification is company-level. Reveal tells you “someone from Acme Corp visited.” It does not tell you who at Acme, or give you their verified email. That’s the difference between a lead and a hint. For workarounds and substitutes, see our Clearbit alternatives guide.
The core difference: person-level vs company-level
This is the whole ballgame, so let’s be precise.
- Company-level (Clearbit Reveal): identifies the account. Answers “what companies are on my site?” Useful for ABM, advertising, and analytics. Useless for emailing a specific human, because it never names one.
- Person-level (RB2B): identifies the individual. Answers “who is on my site?” Necessary for direct outreach — but only valuable if the person is actually correct.
In one sentence: Company-level tells you a door was opened; person-level tells you who walked through — and a wrong person-level answer is worse than no answer at all.
If your goal is reporting or ad audiences, company-level can be enough. If your goal is a rep sending a relevant email, you need person-level — and you need it to be right. That’s where the second axis, accuracy, matters more than the person-vs-company debate. Read the full breakdown in person-level vs company-level visitor identification.
Try Leadpipe free with 500 leads →
The accuracy problem both share
Here’s what RB2B and Clearbit have in common under the hood: both lean probabilistic. They infer identity from IP addresses, device signals, and statistical models rather than confirming it against verified data.
Probabilistic matching has a structural flaw. It’s tuned to maximize match rate — the headline “we identify X% of your traffic” number — which means it would rather return a guess than return nothing. So you get:
- False positives you can’t see. The tool says “Jane Smith” without telling you it’s a 60% guess. You have no way to separate a solid match from a coin flip.
- Shared-IP noise. Corporate VPNs and coworking spaces can map visits to the wrong company or the wrong person entirely.
- Compounding errors in automation. Feed a wrong name into an AI SDR or an automated sequence, and the mistake ships at scale — a hyper-personalized email about pages the recipient never viewed.
This is the case for deterministic matching, which returns a verified match or nothing — never a statistical guess.
The deterministic alternative to both
If you want person-level identification (like RB2B) but can’t tolerate probabilistic guesswork, the alternative is a deterministic, person-level tool: Leadpipe.
How it differs from both RB2B and Clearbit:
- Person-level, like RB2B — but deterministic. Leadpipe matches visitors against its own proprietary identity graph and returns a verified person (name, verified work email, title, company, LinkedIn, page views) or nothing. Independent testing has put deterministic accuracy around 82%, versus the notably lower correct-ID rates typical of probabilistic tools.
- Named people, not just companies — unlike Clearbit. You get the individual and their contact detail, not “someone from Acme.”
- Built to be acted on. Native integrations, webhooks, a REST API, Zapier/Make/n8n, and CRM syncs push verified visitors into your workflow, so the data lands where reps actually work.
| RB2B | Clearbit (Breeze) | Leadpipe | |
|---|---|---|---|
| Level | Person | Company | Person |
| Method | Probabilistic | Probabilistic / IP | Deterministic |
| Verified email | Sometimes | No (company-level) | Yes |
| Returns “nothing” vs a guess | Guesses | Guesses | Returns nothing |
| US match rate | Person-level | Company-level | ~30–40% |
Compare the head-to-head in Leadpipe vs RB2B and Leadpipe vs Clearbit. For a shortlist across the category, see the top 10 visitor identification tools.
Which should you choose?
A quick decision guide:
- You live in HubSpot and mainly want enrichment + company-level signals. Clearbit/Breeze is the path of least resistance. Just know it won’t name individuals for outreach.
- You want free, fast, US person-level Slack alerts and can tolerate some wrong names. RB2B is a reasonable starting point.
- You want person-level identification you can safely feed to reps, sequences, or an AI SDR. You need deterministic matching — that’s where Leadpipe fits, and where probabilistic tools become a liability.
In one sentence: Choose Clearbit for company-level enrichment, RB2B for free US person-level alerts, and a deterministic tool when the data has to be right because someone’s going to act on it.
If your comparison is really “Clearbit or ZoomInfo for a contact database,” we cover that separately in Clearbit vs ZoomInfo.
FAQ
Is RB2B person-level or company-level?
RB2B is person-level — it aims to identify the individual visitor (name and LinkedIn) rather than just the company. That’s its main differentiator from company-level tools like Clearbit Reveal. The trade-off is that RB2B is probabilistic and US-focused, so a share of the identified people will be incorrect and coverage drops outside the United States.
Does Clearbit identify individual website visitors?
No. Clearbit’s website identification (Reveal, now inside Breeze) is company-level — it maps an IP to an organization. Its enrichment can fill in details once you already have an email or domain, but on-site it tells you which company visited, not which person. If you need named individuals for outreach, you need a person-level tool.
Which is more accurate, RB2B or Clearbit?
They measure different things, so a direct accuracy comparison is apples to oranges — RB2B accuracy is about naming the right person, Clearbit’s is about naming the right company. Both are probabilistic, so both carry a false-positive rate they don’t fully expose. For person-level outreach where accuracy is critical, a deterministic tool that returns verified matches or nothing is the safer foundation.
Is there a tool that does both person-level and high accuracy?
Yes — that’s the specific gap Leadpipe targets. It’s person-level like RB2B but deterministic, so it returns verified individuals with work email and page-level behavior, or returns nothing rather than a guess. See Leadpipe vs competitors for how that compares across the field.
Start with data you can act on
RB2B and Clearbit each solve one piece — the person or the company — and both ask you to accept probabilistic guessing. If the whole point is to put verified people in front of your reps, start with the layer that matters and the accuracy that lets you act.
Leadpipe identifies individual US B2B visitors deterministically: verified email, title, company, LinkedIn, and the pages they viewed — or nothing, never a wrong guess.
Try Leadpipe free — 500 identified leads, no credit card required.
Related Articles
- RB2B Review 2026: Features, Pricing & Is It Worth It?
- Clearbit Alternatives in 2026
- Person-Level vs Company-Level Visitor Identification
- Leadpipe vs RB2B
- Leadpipe vs Clearbit
- Deterministic vs Probabilistic Matching Explained
- Clearbit vs ZoomInfo: 2026 Data Provider Comparison
- RB2B Alternatives in 2026
- Top 10 Visitor Identification Tools (2026)
