Companies Using FLoC Opt-Out

As of our March 2026 crawl, TechnologyChecker.io tracks 1,266,316 domains implementing FLoC Opt-Out and 133,757 enriched company profiles matched to LinkedIn data. FLoC Opt-Out is a Permissions-Policy HTTP header that blocks Google Chrome from including a site in cohort-based ad targeting. Despite Google deprecating FLoC in 2022, over 1.2 million sites still deploy this privacy signal. And the data reveals who these privacy-conscious companies are.

Growth Trajectory

FLoC Opt-Out experienced one of the most dramatic adoption curves we've ever tracked. From zero domains in May 2021 to 991 in June 2021, the header appeared the exact month Google began testing FLoC in Chrome. By July 2021, adoption exploded to 16,059 domains. A 16x month-over-month surge driven by privacy advocacy from EFF, Brave, and DuckDuckGo. The steady climb from 2021-2024 plateaued around 76K-180K domains until a massive spike in April-May 2025 reached 656,958 domains. By July 2025, active domains settled at 359,514. We've also identified 387,061 sites that previously used the header but removed it, though many may have simply changed hosting configurations rather than abandoning privacy principles.

Sales Signal: Site owners who implemented FLoC Opt-Out are privacy-conscious early adopters. They took action before it was required, before most businesses even understood cohort tracking. They're prime prospects for consent management platforms, cookieless analytics, and first-party data tools.

"FLoC Opt-Out went from zero to 16,059 domains in two months, the fastest privacy-tech adoption event we've tracked across 50 million domains." - Mehmet Suleyman, CEO at TechnologyChecker.io

Customer Profile

78.5% of companies using FLoC Opt-Out have 1-10 employees, with another 12.3% in the 11-50 range. Only 0.44% are enterprises with 10,001+ employees, yet that small fraction includes IBM, Siemens, DHL, Oracle, Disney, Starbucks, Shell, Target, and the U.S. Navy. The age distribution shows 42% were founded in the 2010s and 25.8% in the 2020s, totaling 67.8% digital-native companies. These aren't legacy enterprises retrofitting privacy. They're privacy-first brands that built FLoC Opt-Out into their stack from day one.

Sales Signal: Small businesses implementing FLoC Opt-Out prioritize user trust over ad revenue. They're willing to sacrifice tracking-based optimization for privacy positioning, making them receptive to ethical marketing platforms and transparent analytics alternatives. The 0.44% enterprise segment is small but prestigious, and the brand names signal that even Fortune 500 companies take this header seriously.

Industry and Geographic Concentration

Retail dominates at 14.4%, with fashion and apparel adding another 9.15% for a combined 23.6% retail-adjacent concentration. Food and beverage (3.5%), wellness (2.9%), and luxury goods (2.5%) round out consumer-facing verticals. Geographically, English-speaking markets command 66%+ of adoption: US (42.3%), UK (10.3%), Australia (6.8%), Canada (6.3%). The US-UK dominance reflects both CCPA/GDPR enforcement pressure and stronger consumer privacy expectations in retail. Markets like Germany (3.2%) and France (2.8%) show moderate adoption, likely because those regions rely more on dedicated CMPs like Cookiebot or Usercentrics rather than a standalone HTTP header.

Sales Signal: The US and UK are the primary addressable markets for privacy-focused tools. Retailers in these regions face heightened consumer privacy expectations, position solutions as trust-building differentiators rather than compliance burdens. The 23.6% retail concentration gives you a precise vertical to target.

Migration Patterns

FLoC Opt-Out is a passive HTTP header, not a software product, so traditional migration patterns don't apply the same way. The 387,061 sites that previously deployed the header but no longer do represent one of three scenarios: hosting provider changes that didn't carry over the configuration, intentional removal (rare), or domain churn. The continued deployment on 1.26 million active domains despite Google's 2022 deprecation of FLoC itself is the real migration story, site owners aren't removing it because the header serves as a general privacy signal. It costs nothing to maintain and communicates privacy commitment to visitors and regulators. The April-May 2025 spike to 656,958 domains suggests renewed privacy awareness, potentially driven by new US state privacy laws or browser policy shifts around Topics API.

Sales Signal: Sites that kept FLoC Opt-Out two years after FLoC's deprecation are making a deliberate statement about privacy values. They're not reacting to a specific threat. They're building a privacy-first brand. These are the highest-conviction prospects for any tool that reinforces that positioning.

"Over 1.2 million sites still deploy FLoC Opt-Out two years after Google killed FLoC, proving it's become a privacy identity signal, not just a technical countermeasure." - Mehmet Suleyman, CEO at TechnologyChecker.io

Technology Ecosystem

The tech stack reveals privacy-conscious but commercially active sites. Cloudflare appears on 93.9% of implementations, making CDN-level header configuration the primary deployment method. Shopify dominates at 79.8%, confirming ecommerce concentration. Here's the paradox: Google Tag Manager (75.2%) and Google Analytics (71.7%) remain prevalent despite blocking Google's cohort tracking. Site owners selectively opt out of cohort targeting while keeping conversion tracking. A privacy stance that's principled but pragmatic. Payment processors show multi-gateway strategies: PayPal (66.9%), Visa (63.5%), Mastercard (59.8%).

Sales Signal: The 79.8% Shopify overlap creates a precise targeting formula. FLoC Opt-Out + Shopify + Google Analytics = ecommerce brands running legacy tracking alongside a privacy header. These companies want privacy positioning but haven't yet switched to privacy-preserving analytics, making them warm leads for cookieless measurement tools and contextual advertising networks.

G2 Review Signals

FLoC Opt-Out is an HTTP header, not a software product with G2 reviews. There's no vendor to review. It's a one-line server configuration. Instead, our technographic crawl data across 1,266,316 active domains and 133,757 enriched companies serves as the primary adoption intelligence. The migration and tech stack patterns tell you more about user intent than any review platform could: sites deploying this header alongside Google Analytics (71.7%) are making a detailed privacy choice, blocking cohort tracking while retaining session analytics. That behavioral signal is worth more than a star rating.

Sales Signal: In the absence of G2 reviews, use tech stack co-occurrence as your sentiment proxy. Sites running FLoC Opt-Out + Google Analytics + Shopify are privacy-aware but commercially pragmatic. They'll respond to pitches that balance privacy principles with business outcomes.

Key Takeaways

1. Privacy movement in a header. 1.26 million sites deploy FLoC Opt-Out despite the technology's 2022 deprecation. It's become a privacy identity signal, not just a technical countermeasure.

2. Retail and DTC dominate. 23.6% retail-adjacent concentration with 79.8% Shopify overlap makes this overwhelmingly an ecommerce privacy play.

3. Paradox of selective privacy. 71.7% run Google Analytics alongside FLoC Opt-Out, site owners block cohort targeting while keeping conversion measurement.

4. English-speaking markets lead. 66%+ adoption in US/UK/AU/CA, driven by both regulatory pressure and consumer privacy expectations.

5. Cloudflare is the deployment mechanism. 93.9% overlap suggests most implementations happen at the CDN level, not at the application layer.

Sales Applications

Outreach template: "Hi [Name], I noticed [Company] implements FLoC Opt-Out on [domain], protecting visitor privacy is clearly a priority for your team. Our data shows 71.7% of FLoC Opt-Out sites still run Google Analytics alongside the header. We help privacy-first brands like yours get the same conversion insights without third-party tracking. Can I show you how [similar company] made the switch?"

Targeting strategy: Filter TechnologyChecker.io for FLoC Opt-Out + Shopify + Google Analytics + US/UK to find ecommerce brands running legacy tracking who might switch to privacy-preserving alternatives. For enterprise targeting, filter FLoC Opt-Out + 1,001+ employees to reach the IBM/Siemens/DHL segment.

Competitive angle: The 93.9% Cloudflare overlap means these sites centralize security and privacy through their CDN. If you sell privacy tools, position as a natural extension of their existing Cloudflare configuration, "You already block FLoC at the CDN level. Here's how to extend that privacy commitment to your entire analytics stack."

Access the full dataset of 133,757 enriched companies and 1,266,316 total domains using FLoC Opt-Out on TechnologyChecker.io for advanced prospecting and competitive intelligence.