How many companies use Clerk?

TechLeads currently detects Clerk on 10,627 websites. HTTP Archive's monthly crawl, a separate dataset, detected it on 28,894 pages in September 2026.

Who are Clerk's biggest competitors?

By number of websites, the largest Product Recommendations technologies besides Clerk are Trustpilot (287,615), Rebuy (13,778), Drip (6,998), Ve Interactive (3,917), SALESmanago (3,903).

Which companies use Clerk?

Websites using Clerk include suno.com, thewire.in, openrouter.ai, simonsinek.com, fut.gg, sfstandard.com. The full list of 10,627 websites can be exported as a CSV for $29.

Clerk market share and customers

As of October 9, 2026, Clerk is used by 10,627 websites in the TechLeads index: 3.2% of all Product Recommendations detections, the 3rd most-used of 36 Product Recommendations technologies.

10,627

websites using Clerk

3.2%

share of Product Recommendations

of 36 in Product Recommendations

Cite this data

Quoting these numbers? Credit TechLeads with a link to this page.

Citation

TechLeads. "Clerk Customers and Market Share." Data as of October 9, 2026. https://techleads.fyi/technology/clerk/market-share

HTML link

<a href="https://techleads.fyi/technology/clerk/market-share">Clerk market share (TechLeads data)</a>

Clerk vs competitors in Product Recommendations

Websites using each technology in the TechLeads index, and its share of all Product Recommendations detections.

#	Technology	Websites	Share
1	Trustpilot	287,615	86.0%
2	Rebuy	13,778	4.1%
3	Clerk	10,627	3.2%
4	Drip	6,998	2.1%
5	Ve Interactive	3,917	1.2%
6	SALESmanago	3,903	1.2%
7	Retail Rocket	1,996	0.60%

Clerk usage over time

In HTTP Archive's monthly crawl of public websites, Clerk was detected on 28,894 pages in September 2026, up 169.1% from a year earlier. HTTP Archive is a separate dataset from the TechLeads index, so its numbers are not added to ours.

Same month, other Authentication technologies in HTTP Archive: Facebook Login 1,887,184, Google Sign-in 545,296, NextAuth.js 84,936, Apple Sign-in 51,541, Linkedin Sign-in 44,214.

Clerk customers by country

Based on country-code domains (such as .de or .co.uk); websites on .com and other generic domains are not assigned a country.

Companies using Clerk

suno.com
thewire.in
openrouter.ai
simonsinek.com · Simon Sinek
fut.gg
sfstandard.com
patient.info · Patient
consensus.app
instantdomainsearch.com · Instant Labs, Inc.
lockr.so
pasion.net
sakura.fm

See all 10,627 websites using Clerk or download the full list as a CSV for $29.

How these numbers are calculated

TechLeads scans public websites and detects Clerk from signals in the page HTML, scripts, cookies, HTTP headers and DNS records. Market share is Clerk's website count divided by the website counts of all Product Recommendations technologies we track; a site using two Product Recommendations tools counts for both. Counts were last refreshed on October 9, 2026 and update daily.

FAQ

Clerk accounts for 3.2% of Product Recommendations detections in the TechLeads index (10,627 websites), which makes it the 3rd most-used of 36 Product Recommendations technologies we track.