Companies Using PostHog

PostHog is used by 20,939 companies worldwide, including Siemens AG, Atos, Baker Hughes Inc., based on our analysis of 50M+ crawled domains at TechnologyChecker.io. It's particularly popular in the Software Development industry (16.86% of customers).

PostHog has 20,939 active customers detected through our monthly crawl of 50M+ domains. We enriched 10,580 of these with LinkedIn company data on TechnologyChecker.io to generate detailed insights. An additional 23,442 sites that previously used PostHog are also tracked.

PostHog holds 0.08% of the Web Analytics market, ranking #41 in the category — based on our analysis of 50M+ domains and 40K+ technologies at TechnologyChecker.io.

The top alternatives to PostHog include Google Analytics (24.46% market share), Hotjar (1.04% market share), Microsoft Clarity (0.89% market share), FullStory (0.32% market share) — based on our market share data across 50M+ crawled domains.

United States leads with 5,242 PostHog customers, followed by United Kingdom (661), Canada (427), Spain (424), Germany (322), based on our enriched company data at TechnologyChecker.io.

The most common company size is 1-10 employees, representing 69.84% of PostHog customers, based on our analysis of 10,580 enriched companies. This is followed by 11-50 employees (19.38%) and 51-200 employees (7.51%).

The majority of PostHog customers were founded in the 2020s (45.16%), followed by the 2010s (34.7%), based on our analysis of 10,580 enriched companies. This suggests PostHog is most popular among relatively young companies.

The ideal PostHog customer is: Company Size: 1-10 employees, Location: US, UK, or Canada, City: San Francisco, New York, London, Founded: 2020-present, Company Age: ~1-5 years old — based on our analysis of 10,580 enriched companies at TechnologyChecker.io.

PostHog can replace GA4 for product analytics, retention tracking, and experiments, but it doesn't cover acquisition metrics and marketing attribution as deeply as GA4. Our data shows 75.1% of PostHog customers also run Google Analytics, suggesting most teams use both tools for different purposes rather than picking one over the other.

PostHog is built for small technical teams. Based on our analysis of 10,580 enriched companies on TechnologyChecker.io, 69.8% of PostHog customers have 1-10 employees. Its free tier includes 1M analytics events, 5,000 session recordings, and unlimited feature flags per month, making it one of the most accessible product analytics tools for startups and small SaaS businesses.

PostHog and Mixpanel both offer product analytics, but PostHog bundles session replay, feature flags, A/B testing, and surveys into a single platform. Mixpanel focuses exclusively on event analytics with a polished UI aimed at product managers. PostHog is open-source and self-hostable; Mixpanel is cloud-only. Our data shows PostHog at 20,939 domains vs. Mixpanel's 19,474, so they're nearly tied on adoption.

PostHog's free tier is generous: 1 million analytics events, 5,000 session recordings, 1 million feature flag requests, and 250 survey responses per month, with no credit card required. More than 90% of PostHog users pay nothing, according to PostHog's own published documentation. Paid usage starts at $0.00005 per event beyond the free tier.

Yes, PostHog offers a self-hosted open-source edition that runs on your own infrastructure. This is a major differentiator from closed-source competitors like Mixpanel, Amplitude, and Hotjar. Self-hosting gives companies full control over their data, which matters for GDPR compliance and industries with strict data residency requirements like banking and healthcare.

Software Development dominates at 16.9%, followed by Real Estate (12.8%) and Technology/Internet (10.5%). IT Services (4.5%) and Financial Services (3.2%) round out the top five. Tech-adjacent industries account for nearly a third of all PostHog customers based on our analysis of 10,580 enriched companies at TechnologyChecker.io.

James Hawkins (CEO) and Tim Glaser (CTO) co-founded PostHog in January 2020. The company went through Y Combinator's W20 batch and has raised over $75 million in funding at a $1.4 billion valuation as of 2025. PostHog is headquartered in San Francisco but operates as a fully remote company with team members across 25+ countries.

The largest companies using PostHog in our detection data include Siemens, Palo Alto Networks, NEC Corporation, Atos, UNICEF, The World Bank, and Citizens Bank. Most enterprise deployments run PostHog on specific internal tools or subdomain projects rather than as a company-wide analytics platform. PostHog also lists ElevenLabs and Lovable among its published customers.

PostHog is strong for product analytics: tracking user behavior within an application, measuring feature adoption, running A/B tests, and watching session replays. It's less suited for traditional web analytics like traffic sources, SEO attribution, and campaign measurement. That's why 75% of PostHog users also run Google Analytics alongside it, based on our tech stack data.

PostHog captures events client-side via JavaScript SDK or server-side via API, so its accuracy depends on implementation. Unlike Google Analytics, PostHog doesn't sample data by default, meaning you get exact counts rather than statistical estimates. PostHog US Cloud has maintained approximately 99.8-99.9% uptime reliability based on independent monitoring data.

PostHog has a dedicated Next.js integration with first-party support for both the App Router and Pages Router. Our tech stack data confirms this: 41.3% of PostHog customers also use Next.js, which is roughly 4x the web-wide average for Next.js adoption. PostHog provides a posthog-js library and a @posthog/next package for turnkey integration.

PostHog uses transparent, usage-based pricing with no per-seat fees. After the free tier (1M events/month), product analytics costs $0.00005 per event, roughly $50 per million events. Session replay costs $0.005 per recording. Most teams paying for PostHog spend between $150 and $900 per month according to published estimates. Volume discounts apply at higher tiers.

PostHog offers three approaches to data privacy: EU-hosted cloud (data stays in EU data centers), US-hosted cloud, or full self-hosting on your own infrastructure. The self-hosted option means no data leaves your network. PostHog also supports cookieless tracking and provides tools for data deletion requests, making it one of the more privacy-friendly analytics platforms available.

PostHog's session replay records actual user sessions, capturing clicks, scrolls, page transitions, and console errors. It includes 5,000 free recordings per month. Unlike standalone replay tools like FullStory or Hotjar, PostHog's replay is tightly linked to its product analytics, so you can jump from a funnel drop-off directly to a recording of a user who dropped off.