PageSourceSearch

A/B testing and personalization

Websites using PostHog

PostHog is an open-source product analytics suite with feature flags, experiments and session replay. About 19,482 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.

How is PostHog detected?

The PostHog snippet initialises the project with posthog.init('<project api key>', ...). The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:

posthog.init( Search the index for it

A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About PostHog

Top 50 websites using PostHog

Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-30 15:53:20 UTC.

#WebsiteRankFound in
1 unep.org 326 js https://www.unep.org/themes/custom/U…/js/app.js?tlej4m view source profile
2 mailerlite.com 985 html https://www.mailerlite.com/ view source profile
3 32auctions.com 1,281 html https://www.32auctions.com/login view source profile
4 opendorse.com 1,533 html https://biz.opendorse.com/consumer-p…-goods-brand-campaigns/ view source profile
5 prezi.com 1,621 js https://prezi.com/gts/assets/useAuthentication-X70MRig0.js view source profile
6 digg.com 1,702 js https://digg.com/_next/static/chunks…MkS8hiaeq9KCJTqcosxwVbT view source profile
7 charitynavigator.org 2,124 html https://www.charitynavigator.org/ view source profile
8 ngrok.com 2,527 html https://ngrok.com/ view source profile
9 crowdcast.io 2,563 js https://www.crowdcast.io/_next/stati…/43ppjh0t1s_8q.js view source profile
10 laravel.com 2,570 js https://laravel.com/build/assets/inertia-Dfj01zwH.js view source profile
11 tinypng.com 2,633 js https://tinypng.com/_next/static/chu…ain-989955e639c08462.js view source profile
12 crowdin.com 2,781 html https://crowdin.com/ view source profile
13 navattic.com 3,075 js https://app.navattic.com/_next/stati…app-f2f3d5a41be2d36d.js view source profile
14 uptimerobot.com 3,316 js https://dashboard.uptimerobot.com/_n…/1ap0ckzcb0321.js view source profile
15 cal.com 3,529 html https://cal.com/ view source profile
16 rudderstack.com 3,575 js https://www.rudderstack.com/_next/st…jpJtnYsuZWp8wGXu3sMxJa2 view source profile
17 toggl.com 3,791 html https://toggl.com/blog/ view source profile
18 geekflare.com 3,930 js https://geekflare.com/_next/static/chunks/3wiait7yxhzuj.js view source profile
19 solana.com 3,945 js https://solana.com/_next/static/chun…bzvbXXCJVfnrx2cgLU1cd1v view source profile
20 livestorm.co 4,062 js https://livestorm.co/_nuxt/ClrPqwtt.js view source profile
21 posthog.com 4,089 js https://posthog.com/scripts/posthog-init.js view source profile
22 linear.app 4,134 js https://static.linear.app/web/_next/…/chunks/CUGxGGjg.js view source profile
23 osano.com 4,172 html https://www.osano.com/ view source profile
24 betterplace.org 4,330 js https://betterplace-assets.betterpla…/js/321-9be6eb81.js view source profile
25 storyblok.com 4,376 js https://www.storyblok.com/_astro/Pos…ab4cea6f2ac95000844ef27 view source profile
26 crisp.chat 4,491 js https://crisp.chat/_crisp/D1RxsVEU.js view source profile
27 s.id 4,614 js https://home.s.id/assets/module-CsLf1p4e.js view source profile
28 blavity.com 4,743 js https://blavity.com/_nuxt/DtW9ib5a.js view source profile
29 heygen.com 4,812 js https://www.heygen.com/assets_2025_r…/059bym0dk86b5.js view source profile
30 conductor.com 4,839 js https://www.conductor.com/_next/stat…/23xccag45ila2.js view source profile
31 nme.com 4,849 js https://www.nme.com/_next/static/chunks/0eh41_g8ejjt0.js view source profile
32 hunter.io 5,100 html https://hunter.io/ view source profile
33 tailwindapp.com 5,213 html https://www.tailwindapp.com/about view source profile
34 coub.com 5,594 js https://coub.com/_next/static/chunks…?dpl=prod-6fd57c0 view source profile
35 letemps.ch 5,876 html https://www.letemps.ch/ view source profile
36 webinarjam.com 5,891 html https://webinarjam.com/ view source profile
37 raycast.com 6,106 js https://www.raycast.com/_next/static…/2i18hncr-2qqb.js view source profile
38 krea.ai 6,348 js https://www.krea.ai/blog/_astro/Base…ndex_0_lang.DksIK69V.js view source profile
39 whoisxmlapi.com 6,686 html https://main.whoisxmlapi.com/wxa-res…/product-sheets view source profile
40 livelib.ru 6,712 html https://www.livelib.ru/books view source profile
41 langfuse.com 6,714 js https://langfuse.com/_next/static/im…/1_lymb8pbo-ie.js view source profile
42 applovin.com 6,798 js https://ads.applovin.com/public/v202…Dut9G4aA7NF_0NDDKJbZ.js view source profile
43 hashnode.com 6,901 js https://hashnode.com/_next/static/ch…FDqhxP2omfb2MA2be22Yau5 view source profile
44 twominutereports.com 7,011 js https://media.twominutereports.com/_…b1e-f1c780ae8be90fdd.js view source profile
45 neuralink.com 7,113 js https://neuralink.com/assets/entries…page.client.DcXJECMp.js view source profile
46 credential.net 7,181 js https://www.credential.net/main.d0f2b1bf103254ca.js view source profile
47 climatecentral.org 7,218 js https://www.climatecentral.org/_next…b1e-79d7350ad74f4202.js view source profile
48 sourcegraph.com 7,329 js https://sourcegraph.com/_docssvc/imm…/chunks/HH8BUJv2.js view source profile
49 theleagueofmoveabletype.com 7,676 js https://www.theleagueofmoveabletype.…06c-d295351079f347bb.js view source profile
50 deeplearning.ai 7,858 js https://www.deeplearning.ai/_next/st…WmVDKNsuYBRqowmjTEdSLGa view source profile

How it appears in the source

From unep.org (js):

f (window.location.pathname === '/resources' && postHogPayload.country === 'Kenya') { //     posthog.init('phc_cISsqP6LMZsQpfKPtl81xJmZvUePzoI0vAUboIZKXMF', { api_host: 'https://app.posthog.com' }); /

See every site: search for posthog.init(

Questions about finding PostHog

How does PageSourceSearch know a website uses PostHog?
By the source itself: The PostHog snippet initialises the project with posthog.init('<project api key>', ...). PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
Is this a complete list of websites using PostHog?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 19,482 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
How do I find websites that use PostHog together with another technology?
Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example posthog.init( with wp-content/plugins/ lists the WordPress sites that use PostHog.