Companies Using Google Sign-in

With more than ten years in technographic data, I start every profile by asking what the rule counts, and for Google Sign-in that question took about 15% off the raw number. Our October 2026 crawl finds Sign in with Google on 252,157 live domains before cleaning. 38,487 of them are domains for sale or gambling pages, so the base for everything below is 213,670 live domains, 101,406 of them matched to a company.

The for-sale problem

31,850 domains carry the title "Premium Domain For Sale | Atom". Atom's landing-page template offers One Tap sign-in, so parked names on that marketplace look like Google Sign-in sites. Another 1,871 for-sale pages and about 4,759 gambling sites came out too. A few smaller template effects are still inside the 213,670: hosted privacy centres, a landing-page builder's 404 page and one real-estate platform's placeholder tag each add a few hundred domains or fewer, and I kept those sites off the company list.

Sales Signal: 15.3% of a raw Google Sign-in list is for sale or gambling. Drop short brandable .com names with no company behind them before any outreach.

One reading, not a trend

The cleaned count exists for October 2026 only, so this page has no usage chart, and I won't infer growth from a single point. Even a raw history wouldn't be a clean adoption curve: the set of domains we crawl turns over every month, with dead sites dropping out and newly found ones added, and our detection signals widen over time. What I can describe is where the button sits today.

"Sign in with Google is on more than 200,000 live domains, and for a lot of small sites the decision to add it was made by their website platform, not by them." - Elif Arslan, CMO & Co-founder, TechnologyChecker.io

Sales Signal: with one reading, sell on what a site has built around the button. There's no adoption momentum on this page to sell on.

Customer profile

The base is small and young. 64.47% of matched companies with a known size have 1 to 10 employees, 87.25% have 50 or fewer, and 70.02% were founded in 2010 or later. At the top end, 1,204 companies have more than 1,000 staff, and they put the button where accounts are created: Atlassian on id.atlassian.com, Revolut on its single sign-on page, Amazon on its jobs portal, Real Madrid on its member sign-in. Uber, Pinterest, Indeed, Canva, Coinbase and CNN load it on their main sites. Pinterest is also one of Google's published Sign in with Google case studies.

Sales Signal: at a large company, Google sign-in belongs to the identity or growth team behind the account system, not to marketing.

Industry and geography

Real Estate leads at 7.57%, and the reason is a platform choice. 17 of the 18 Real Estate sites we sampled run on agent-website platforms, iHOUSEweb, Sierra Interactive, Placester and Brivity among them, which add Google sign-in to their property-search sign-up. The Brivity sites we checked carry only a placeholder tag, so those agents are counted without a working button. The internet, software and IT services industries add 14.39% between them, and restaurants 4.73%, including ordering sites such as Marco's Pizza and Domino's Pakistan.

By country, the United States leads with 27,993 matched companies, then the United Kingdom (8,448), India (7,453) and Brazil (5,084). India above every European country is the surprise, and the Indian consumer sites on our list, Myntra, Policybazaar and Zomato among them, fit it.

Sales Signal: in real estate, sell to the platform. One platform decision changes the login on hundreds or thousands of agent sites at once.

What runs next to it

Sites add sign-in buttons and keep the old ones. 7,105 domains offer both Google and Apple sign-in today, about two thirds of Apple Sign-in's 10,499 domains, and 2,321 pair Google with LinkedIn. Auth libraries show up as well: 531 domains run Google sign-in with NextAuth.js, which often provides it, 248 with Auth0 and 107 with Clerk. None of these pairs passes our switching tests, because most domains we've seen with both still run both.

"If a site offers Apple's sign-in, the odds are two to one it offers Google's too. For anyone selling login tools, Google's button is the baseline and everything else is an add-on." - Elif Arslan, CMO & Co-founder, TechnologyChecker.io

Sales Signal: a site with Google's button but no second method is the natural prospect for anyone selling another sign-in option or a single login layer.

The stack around it

Across the 213,674 live domains in our stack sample, Google Analytics runs on 71.36% and WordPress on 36.72%, with Elementor at 15.34% and WooCommerce at 9.31%. The app side is clear as well: Amazon Web Services on 8.84%, Next.js on 8.41%, Vercel on 3.3%, Firebase on 3.07% and Nuxt.js on 2.74%. That makes the Google Sign-in base two populations, WordPress business sites and JavaScript apps, with different owners.

Sales Signal: split the list by stack before writing a message. A WordPress site whose plugin added the button and a Next.js app with a hand-built login have different buyers and different problems.

What Google says, and what we see

Google's developer overview describes Sign in with Google as one library for a personalised button, One Tap and automatic sign-in, and its product page claims up to 8x improvements in sign-up conversion. The older Google Sign-In JavaScript library was deprecated on 31 March 2023; client IDs created after 29 July 2022 can't use it, and no sunset date is set. Our rule counts both versions. Google lists no fee for the button itself, and costs start only when sign-in runs through Google Cloud Identity Platform, which is free up to 50,000 monthly active users for social sign-ins.

Sales Signal: a site still carrying the legacy meta tag has a migration it hasn't finished. That's a technical conversation and a good reason to start one.

Key takeaways

• 213,670 live domains after removing 38,487 for-sale and gambling pages; 2nd of 54 in Identity & Access with 21.53%.
• 87.25% of matched companies have 50 staff or fewer, and 70.02% were founded in 2010 or later.
• Real estate leads because agent-website platforms add the button for their customers.
• Apple's button usually sits beside Google's: 7,105 domains offer both.
• Large companies put it on account, sign-in and careers subdomains.

How to use this list

Outreach template: "Hi [Name], [domain] offers Sign in with Google on [page]. If you're planning to add a second sign-in method, here's how [product] handles several without a rebuild of your login."

Targeting strategy: filter Google Sign-in companies with 11 to 200 staff that run Next.js or Firebase. That's the app-building segment, where someone on the team built the login.

Competitive angle: in real estate, check the site platform first. A Sierra Interactive or iHOUSEweb site got Google sign-in from its platform, so the buyer is the platform.

The full Google Sign-in list on TechnologyChecker.io covers 213,670 live domains and 101,406 matched companies from our October 2026 crawl. Our guide to technology detection methods explains why a script on a page doesn't always mean a customer.