Companies Using Clearbit

HubSpot completed its purchase of Clearbit on 4 December 2023, according to HubSpot's investor release, and has been moving Clearbit's jobs into Breeze Intelligence since. Clearbit's free tools closed on 30 April 2025, per Clearbit's own announcement, and its help centre says it no longer offers new standalone subscriptions. Yet our October 2026 crawl still finds Clearbit's JavaScript tag on 4,737 domains. We matched 3,524 of the 4,751 in our clean live set to a company, a 74.17% match rate. This is a look at that installed base: who still runs the tag, how fast it's coming off, and where the leavers go.

What the tag tells you

We count a site when a page loads a script from clearbitscripts.com or a clearbitjs.com host. That's the website half of Clearbit: Reveal, which Clearbit's homepage describes as turning anonymous traffic into buying intent with IP intelligence, and the form tag that fills fields from an email address. Customers who only call Clearbit's APIs from a CRM don't appear. I loaded the 50 sites on our company list on 10 October 2026 and every one still carried the tag: 38 load tag.clearbitscripts.com, 22 pull scripts from x.clearbitjs.com and 6 fire a pixel from grow.clearbitjs.com. On ClickUp's university site the loader still fetched Clearbit's tracking and forms scripts. One loader, on quinnox.com, carries no account key at all.

Sales signal: a live tag means a marketing team still routes visitor or form data through Clearbit, or did until recently and never removed it. Either way, whoever owns that tag is the person to ask what replaces it.

Growth trajectory

Our crawl began covering Clearbit in August 2026, so the chart is short: 3,595 domains in August, 4,744 in September and 4,737 in October. I wouldn't read the August-to-September jump as adoption. The set of domains we crawl turns over every month, with dead sites dropping out and new ones added, and our detection widened as coverage of the tag settled, so a newly covered technology climbs in its first months whatever the market does. The flat October point is the more honest reading, and underneath it the exits are steady. Since 4 August, 663 domains have dropped the tag on at least one hostname. 141 of them still load it somewhere else, and 522 removed it from every hostname we crawl while the site stayed live: 103 in August, 321 in September and 98 so far in October.

"Nearly three years after the acquisition, 4,737 sites still load Clearbit's tag. That's an installed base waiting on a decision, and 522 of them have made one since early August." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales signal: this list is shrinking, so timing matters. The 522 domains that removed the tag are the freshest conversations for any enrichment vendor, and the 4,737 still running it may follow.

Who the customers are

Small software companies and agencies. 75.29% of matched companies with a known headcount (2,618 of 3,477) have 50 or fewer staff, and only 38 employ more than 1,000. They're young as well: 73.38% (2,103 of 2,866) were founded in 2010 or later, and 10.89% before 2000. Software development is the largest industry at 21.54%, with advertising services next at 11.23%. These are teams that buy company data to score and route their own inbound leads.

The recognisable names fit that pattern: Rippling, Grafana Labs, ClickUp, PandaDoc, Checkr, Kong and Cockroach Labs. The larger ones often run the tag on one property. TeamLease has it on group.teamlease.com, Tenable on its Brazilian Portuguese site, ClickUp on its university site and PandaDoc on its signup page.

Sales signal: pitch the marketing operations lead at a software company of 11 to 50 people, and lead with continuity: what keeps their form shortening and visitor alerts running if the Clearbit tag stops answering.

Industries and countries

Software and IT labels add up to 40.71% of matched companies, and agencies, advertising plus marketing services, another 15.28%. The top ten industries cover 65.92% of the base, so it's concentrated. Geography is narrower still. The United States has 1,680 matched companies, 47.67%, and English-speaking markets together hold 2,379 of the 3,524. France (153) and India (130) are the largest markets outside them. Germany has 39, fewer than Brazil (80).

Sales signal: one message covers most of this list: American, English-language, aimed at SaaS marketing teams and the agencies that run their demand generation.

Where the leavers go

The migration table on this page reads like a HubSpot story, with 332 domains in the "switched to" row. Read it carefully. Those rows count domains that dropped Clearbit and run the other tool today, whenever it arrived, and 91 of the 332 still load Clearbit elsewhere. So I ran the test that matters. Among the 522 domains that removed Clearbit everywhere, 46.17% run HubSpot; among the 4,623 that never dropped it, 50.03% do. Leavers are no more likely to have HubSpot than stayers. Rivals show the same: 3.83% of leavers run ZoomInfo against 9.28% of stayers, 3.64% run Apollo against 10.99%, and 2.87% run 6sense against 5.15%. Of the five tools I tested, Segment is the only one slightly more common among leavers, 11.88% against 9.80%.

"The leavers aren't landing on a rival we can see. Almost half of them already ran HubSpot, so a move to Breeze Intelligence wouldn't leave a new trace in our data." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales signal: treat a removed Clearbit tag as an open seat. These domains stopped identifying visitors with Clearbit, and few of them run ZoomInfo, Apollo or 6sense instead.

The stack around it

Percentages here are of the 4,751 live domains in our clean set. HubSpot runs on 50.35%, against 3.89% for Salesforce's Account Engagement and 3.28% for Marketo, so half of Clearbit's remaining base already runs the platform that bought it. Google Analytics is on 92.32%. Sales-data tools sit beside it: Apollo on 11.2%, ZoomInfo on 9.43% and 6sense on 5.22%, with Vector (3.47%) and Qualified (3.3%) further down. HubSpot Chat runs on 14.46% and Intercom on 8.04%.

Sales signal: for HubSpot's own team, the 50.35% are the obvious Breeze Intelligence conversations. For everyone else, the other half matters more: those sites have no replacement waiting inside a CRM they already run.

Key takeaways

1. 4,737 domains still load Clearbit's tag in October 2026, 3,524 matched to a company.

2. The base is small, young and software-led: 75.29% have 50 or fewer staff and 73.38% were founded in 2010 or later.

3. 522 live domains removed the tag between 4 August and 10 October 2026, 11.02% of the October count.

4. Leavers don't run HubSpot, ZoomInfo or Apollo more often than stayers, so the table's "switched to" rows aren't evidence of switching.

5. Half the remaining base already runs HubSpot; the other half has no Breeze Intelligence path in its stack.

How to use this list

Split it in two. The 522 recent leavers are worth a call now: they turned off company identification, and for most of them none of the rivals we tested took its place. The 4,737 still on the tag suit a slower track, filtered to sites without HubSpot. An opening line for an enrichment vendor: "Your site still loads Clearbit's tag, and Clearbit no longer sells standalone plans; here's how teams your size kept form enrichment running." For the full list of 4,737 Clearbit domains with company, size and stack data, explore TechnologyChecker.io.