Companies Using FullStory

I build prospect lists from detection data, so I read a FullStory page looking for the filter that separates buyers from noise. As of our October 2026 crawl, FullStory's capture script runs on 26,974 live domains, and we matched 10,224 of them to a company record. Two numbers set FullStory apart from the rest of its category: 56.28% of the matched domains are in the United States, and Software Development is the top vertical at 10.35%. Below I go through the trajectory, the customer profile, how FullStory sits against its alternatives on our data, the stack around it, and what G2 reviewers say.

1. Footprint and trajectory

FullStory's monthly count in our current crawl went from 20,951 domains in June 2026 to 23,839 in July, 26,002 in August, 26,519 in September and 26,974 in October 2026. I wouldn't read the June-to-August rise as a burst of adoption. The set of domains we crawl turns over every month, with dead sites dropping out and newly found ones added, and our detection of FullStory has widened over the same months. The September and October readings, 455 domains apart, are the steadier guide. Our FullStory records go back to December 2014, but the chart only shows the current crawl.

On share, FullStory ranks 5th of the 34 tools in Heatmaps & Session Recording with 1.54% of the category. Contentsquare is 4th, 7,690 domains ahead at 34,664. Lucky Orange is 6th at 26,443, just 531 behind, so FullStory's 5th place isn't secure from one month to the next. When this page was last updated, Lucky Orange was 5th and FullStory 6th.

"FullStory's rank tells you very little. Its 26,974 domains are under 3% of Microsoft Clarity's 955,921, but more than half of its matched base is American and its top vertical is software. That's a buyer list." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales Signal: Size the FullStory base at 26,974 domains and plan for a flat count: the last two monthly readings moved by 455. Inside these accounts the live conversation is about renewal and expansion.

2. Customer profile

Of the 9,896 FullStory domains with a known headcount, 5,469 (55.26%) belong to companies with 1-10 employees and 7,688 (77.69%) to companies with 50 or fewer. A domain count gives a two-person agency the same weight as Target, so the useful cut is at the top: 1,095 domains belong to companies above 200 staff, 421 above 1,000 and 93 above 10,000. On founding year, 45.43% of the 6,236 FullStory companies with a known date started in the 2010s and 24.09% in the 2020s.

I checked the enterprise names in a browser on 11 October 2026, and FullStory's script loads on all of these: target.com, chipotle.com, Farmers Insurance's agent finder at agents.farmers.com, ritzcarlton.com and JW Marriott's site (two Marriott brands that load the same FullStory organisation ID), pitneybowes.com, Unum's customer login, spicejet.com, Dollarama's online shop, Globe Telecom's GFiber Prepaid site and lexisnexis.com. Plenty of deployments cover one journey rather than the whole company: jobs.netflix.com, cardsandbanking.qantas.com, library.osu.edu and alumni.uga.edu. Fullstory's about page names no customers, so this list rests on detection alone.

Sales Signal: Filter the FullStory list to companies above 200 staff and you get the 1,095 domains where a replay tool has already been through procurement. Below 50 staff, expect agencies and startups, which calls for a lighter, self-serve motion.

3. Industry and geography

Software Development leads FullStory's matched industries at 10.35% (971 domains), followed by Technology, Information and Internet (6.48%), Retail (5.44%), Financial Services (4.94%) and IT Services and IT Consulting (4.09%). The three technology verticals together cover 1,963 domains. For comparison, Microsoft Clarity's top vertical is Retail at 5.94% on its August 2026 profile, and Contentsquare's is Software Development at 5.48% on its October 2026 profile.

Geography is more lopsided. The United States holds 5,754 of the 10,224 matched FullStory domains (56.28%). The same figure is 142,528 of 474,072 for Microsoft Clarity (30.06%) and 6,119 of 19,587 for Contentsquare (31.24%), per their profiles. After the US come the United Kingdom (722), Australia (483), Canada (468) and India (223). The five English-speaking markets, adding New Zealand's 61, total 7,488 domains, 73.24% of FullStory's matched base. Continental Europe is thin: France 172, Germany 112, Spain 90.

Sales Signal: US plus software or internet is the core FullStory segment. US plus retail, insurance or financial services above 200 staff is where the large accounts sit, the Target, Farmers and Unum pattern. A seller working Europe should expect short lists: France, Germany and Spain together hold 374 matched FullStory domains.

4. How FullStory compares with its alternatives on our data

The question we see most in search is what to use instead of FullStory. Here is the field on our numbers. Domains and share are October 2026 unless dated; "run both today" counts domains with both scripts live now, and "ever both" counts domains seen with both at any point since our tracking began in March 2026.

Most of these sites keep both tools. Of 3,820 domains we've seen with both FullStory and Microsoft Clarity since March 2026, 2,449 (64.1%) still run both. For Hotjar it's 1,370 of 1,927 (71.1%). With that many sites keeping both tools, we don't publish a FullStory-to-Clarity or FullStory-to-Hotjar switch, whatever the raw departure counts look like. Microsoft markets Clarity as "free forever", and Contentsquare announced its acquisition of Hotjar in September 2021, so two rows in that table belong to one company.

One pair does pass our switching tests: 8 domains dropped FullStory and now run Quantum Metric, and 4 went the other way, since March 2026. Only 8 of the 31 domains ever seen with both still run both, and 3 of the 8 moves happened in the last 30 days. These are small numbers, and I'd want a few more months of them before calling the pair a trend.

"Most FullStory sites that add Clarity or Hotjar keep FullStory. The one rival sites do switch to is Quantum Metric, and so far that's 8 domains." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales Signal: If you sell against FullStory, the free-tool argument is weaker than it looks: 2,449 domains run FullStory next to Clarity, which costs nothing, and haven't dropped it. Pitch what Clarity doesn't do for that team. If you sell a complementary tool, those 2,449 dual-stack domains are accounts already comfortable running more than one replay tag.

5. Technology ecosystem

The shares in this section are of the 26,454 clean live FullStory domains. Google Tag Manager (89.88%) and Google Analytics (86.62%) are on almost all of them, which mostly tells you FullStory gets deployed through a tag manager next to standard analytics. The product-analytics row is more telling: Amplitude runs on 9.64%, against 1.75% for Mixpanel, 1.46% for PostHog, 0.84% for Heap and 0.81% for Pendo. OneTrust handles consent on 8.41%, and enterprise tag managers show up as Adobe Experience Platform Launch (2.64%), Adobe DTM (2.51%) and Tealium (1.76%). On commerce, Shopify reaches 8.78% and WooCommerce 1.48%.

Sales Signal: FullStory plus Amplitude is a product team running both quantitative and qualitative analytics. OneTrust or Tealium on the same domain marks a company with formal privacy and tag governance, so plan for a security review in the sales cycle.

6. G2 review signals

On G2, FullStory's most-cited strengths are helpful and responsive customer support (34 mentions) and ease of use (33). The leading complaint is a steep learning curve (18), then performance issues (13), cost (10) and the manual work of building metrics (9). Ease of use and a steep learning curve can both rank high because they describe different layers: replay is easy to start with, and the analytics underneath takes work. Cost is the complaint free tools feed on, yet our data shows 2,449 domains running FullStory next to Microsoft Clarity rather than dropping it.

Sales Signal: Lead with responsiveness and time to value, because that's what this base says it values. If your product shortens FullStory setup or sits on top of its data, the learning-curve complaint is your opening line.

Key takeaways

1. A small, American, software-heavy base. 26,974 domains, 56.28% of matched domains in the US, Software Development at 10.35%.

2. The rank is fragile. 5th of 34, 531 domains ahead of Lucky Orange and 7,690 behind Contentsquare.

3. Rivals sit beside FullStory more than they replace it. 2,449 domains run it with Clarity and 1,370 with Hotjar.

4. The only published switch is small. 8 domains to Quantum Metric, 4 back, since March 2026.

5. The enterprise tail is where the contracts are. 1,095 domains above 200 staff, including Target, Chipotle, Farmers Insurance and Unum.

Sales applications

Outreach template: "We can see FullStory running on [Company]'s [site or subdomain] alongside Amplitude. G2 reviewers say replay is easy and the metrics take work. How much of the analytics layer is your team actually using?"

Targeting strategy: FullStory, United States, more than 200 employees, in retail, insurance, financial services or software. Add OneTrust or Tealium to find the accounts with formal governance.

Competitive angle: Selling against FullStory, start with the 2,449 domains that already run Clarity next to it, because that comparison is already happening inside those accounts. Selling alongside it, the 1,095 domains above 200 staff are where a replay tool has already cleared a budget review.

The full list of 26,974 FullStory domains, with company size, industry, country and the URL where we detected each deployment, is on TechnologyChecker.io and refreshed monthly.