Companies Using CallRail

I've spent more than ten years building web crawling and technographic systems, and call tracking is a category where the script tells you a lot about the buyer. Our October 2026 crawl finds CallRail on 74,460 live domains and matches 53,748 of them to a company. What follows uses that set, the exits we've recorded since March 2026, a browser check of the 50 companies in the table, and the G2 review counts on this page.

Growth trajectory

The chart climbs from 49,733 domains in June to 74,460 in October. I wouldn't sell that as momentum. The set of domains we crawl turns over every month, with dead sites dropping out and new ones coming in, and our detection widens over time, so a good part of the climb is us seeing more of the web. I'd watch the slope at the end instead: 1,732 domains added between September and October, after 5,656 the month before. Exits are real as well. 10,813 domains have dropped CallRail since our coverage began in March 2026, so the base turns over even while the line rises.

"CallRail's count is close to a census of small businesses that answer the phone for a living. It moves with how much of that web we can see and with how many of those firms buy ads, far more than with anything a rival does." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker

Sales Signal: Treat the 74,460 as a list of active local advertisers rather than a growth story. Segment matters more than timing, because the same script sits on a two-person roofing site and on a hospital system's physician directory.

Customer profile

Half the matched companies (50.4%) have 1 to 10 staff and another 33.85% have 11 to 50. They aren't start-ups: 8.71% were founded in the 2020s and a quarter predate 1990. A second customer hides in the same list, though. 536 companies have more than 1,000 staff, and 19 of the 50 names in our table are hospitals and health care groups. They buy CallRail per site or per location. Mercy loads it on its careers pages, Florida International University on its Frost Art Museum site, CenterPoint Energy on its Hmong-language site. Massachusetts General Hospital, Brigham and Women's, Newton-Wellesley and McLean all call the same CallRail account, Mass General Brigham's. That's the multi-location pattern in one account. CallRail doesn't publish a customer list we could cross-check, so every name here comes from our own browser check.

Sales Signal: Filter by headcount before you write a line. The owner-operator buys on price and setup time. The hospital marketing team buys on location-level reporting, HIPAA terms and how many sites one account can cover.

Industry and geographic concentration

Construction leads at 11.67%, then medical practices (8.7%) and law practices (7.7%). Add LinkedIn's second health care label and health care reaches 13.21%; legal reaches 10.82% across its two labels. All of them sell over the phone. CallTrackingMetrics' list leans further into health care, 19.96% across medical practices, hospitals and mental health care, and much less into law, with Law Practice at 3.52%.

Geography is simpler. 46,707 matched companies are American and 4,270 Canadian, 96.1% of those we could place. The UK (961) and Australia (882) are the only other countries in the hundreds, and with the US and Canada they're the four markets CallRail's pricing page supports.

Sales Signal: Anything sold on the back of CallRail is a North American sale. Elsewhere local trackers hold the ground: WildJar's profile places 1,791 matched companies in Australia, about twice CallRail's 882 there.

Overlap and switching

Earlier versions of this page showed switching counts. I've taken them out, because none of CallRail's rival pairs passes our test for a real switch. We call it switching only when at most 40% of the domains that have ever run both products still run both. With CallTrackingMetrics that figure is 80%, 1,285 of 1,606. With Invoca it's 69.4% (522 of 752), with Marchex 81.3% (231 of 284) and with Patient Prism 63.4% (52 of 82). Two trackers on one domain is a normal state in this category: two campaigns, two agencies, or an old script nobody removed.

The exits point the same way. Of the 10,813 domains that dropped CallRail since March, 85 run CallTrackingMetrics, 57 Invoca and 22 Patient Prism, and fewer than 200 turn up on any rival we track. In the other direction, 166 domains that dropped CallTrackingMetrics and 150 that dropped Invoca run CallRail.

"When fewer than one in fifty departing domains shows up on a rival, CallRail's real competitor is the site that stops measuring calls, or measures them somewhere we can't see." - Mehmet Suleyman, CEO & Co-founder at TechnologyChecker

Sales Signal: Rival-displacement campaigns have a small pool here. The bigger opening is retention: most domains that drop CallRail never reappear on a competitor, so an agency that can tie calls to booked jobs keeps the account.

Technology ecosystem

The stack is a local business website, plainly. Google Analytics runs on 94.39% of the 75,187 live CallRail domains our stack figures use, WordPress on 63.43%, Elementor on 19.18% and Divi on 5.58%. Forms carry the other half of lead capture. Gravity Forms is on 15.3% and Contact Form 7 on 11.96%, which matters because CallRail's Complete plans also track form submissions. Cloudflare fronts 54.16% of the sites and reCAPTCHA appears on 32.29%. Hosted builders are a small slice, Duda on 2.74% and Webflow on 2.64%.

Sales Signal: CallRail says more than 7,000 agencies use it, so the agency that built the WordPress site is often the buyer to reach. Pitch form attribution to the sites already running Gravity Forms or Contact Form 7 next to a tracking number.

G2 review signals

The G2 summary on this page counts 481 mentions across its five leading positives, led by ease of use at 122, against 139 across its five complaints. The biggest complaint, missing group texting and outbound call recording, has 33. Two complaints map onto segments we can size. Thirty mentions describe integration trouble with niche CRMs and patient management software, and health care is 13.21% of CallRail's matched companies; Patient Prism and Liine both sell integrations with practice systems. Twenty-five mentions cover spam calls and billing by the minute, which is how CallRail prices usage: $0.06 per extra local minute on every plan.

Sales Signal: The integration complaint is the healthcare specialists' opening, and our overlap data says they win it slowly: 52 domains run Patient Prism next to CallRail and 41 run Liine.

Key takeaways

1. CallRail holds 38.28% of Call Tracking, first of 43 and larger than CallTrackingMetrics and Invoca combined.
2. The line is flattening: 1,732 domains added in the last month, while 10,813 have dropped it since March.
3. The core customer is a North American service business with no more than 50 staff, where the phone books the work.
4. A second customer, hospital systems and franchise networks, buys it per site or per location.
5. Overlap with rivals is heavy and measurable switching is close to nil.

Sales applications

Outreach angle: "Your site runs CallRail next to Gravity Forms, so calls and forms are both tracked. Who follows up on the leads that arrive after hours?" It fits the 15.3% of CallRail domains with Gravity Forms.

Targeting strategy: filter to 11 to 50 employees in construction, medical practices or law practices in the United States. Those firms are big enough to have a marketing budget and small enough to buy without a committee.

Competitive angle: the 1,285 domains running CallRail and CallTrackingMetrics together pay for two trackers. Consolidation is an easy conversation for either vendor, or for the agency in the middle.

Every detection figure here comes from our crawl: 74,460 CallRail domains and 53,748 matched companies as of October 2026. Our write-up on technology detection methods explains how we find scripts like this one, and the full company list is on TechnologyChecker.io.