PostHog vs GrowthBook: Tech Stack Comparison (2026)
PostHog vs GrowthBook tech stack: GrowthBook wins on growth tooling with HubSpot, Calendly and paid ads; PostHog leads on DNS and email security hygiene.
Go-to-Market Strategy
PostHog’s observed motion is self-serve/product-led: the scan detects Google Tag Manager as the only analytics tool, no CRM, chat, ABM, or advertising tools, and pricing as the only captured conversion section alongside linked app.posthog.com. GrowthBook’s observed motion is mixed, combining enterprise-sales-led and self-serve/product-led signals with HubSpot CRM, HubSpot Forms, HubSpot Chat, Calendly, Google Campaign Manager, and Twitter Ads, plus demo, enterprise-assessment, contact, and pricing conversion sections. PostHog’s lean stack is coherent for product-led acquisition, while GrowthBook has broader observable demand-capture and sales-routing instrumentation. Slight edge: GrowthBook.
PostHog’s observed motion is self-serve/product-led, and its stack reflects a product-led funnel rather than a field-sales motion. The detected tools center on content delivery and analytics: Google Tag Manager, Strapi, Gatsby, and Vercel support the main site, with app.posthog.com linked as the product entry point. No CRM, chat, ABM, advertising, or form tools were detected in the scan.
PostHog Evidence:PostHog’s technology stack detects Google Tag Manager as the only analytics tool, and it detects Strapi, Gatsby, and Vercel in the CMS, framework, and hosting categories. The sitemap lists pricing as the only captured conversion section, and subdomain records list app.posthog.com as linked but unscanned.
PostHog’s technology stack detects Google Tag Manager as the only analytics tool, and it detects Strapi, Gatsby, and Vercel in the CMS, framework, and hosting categories. The sitemap lists pricing as the only captured conversion section, and subdomain records list app.posthog.com as linked but unscanned.
GrowthBook’s observed motion is mixed, with both enterprise-sales-led and self-serve/product-led signals present. HubSpot CRM, HubSpot Forms, HubSpot Chat, and Calendly are detected for inbound capture, while Google Campaign Manager and Twitter Ads support paid acquisition. The site exposes app.growthbook.io and docs.growthbook.io as separate product and documentation surfaces.
GrowthBook Evidence:GrowthBook’s stack detects HubSpot CRM, HubSpot Forms, and HubSpot Chat in the CRM and chat categories, with Calendly present at medium confidence. The sitemap lists demo, enterprise-assessment, contact, and pricing as conversion sections, and app.growthbook.io and docs.growthbook.io return HTTP 200.
GrowthBook’s stack detects HubSpot CRM, HubSpot Forms, and HubSpot Chat in the CRM and chat categories, with Calendly present at medium confidence. The sitemap lists demo, enterprise-assessment, contact, and pricing as conversion sections, and app.growthbook.io and docs.growthbook.io return HTTP 200.
Infrastructure & Delivery
PostHog’s main site is a static Gatsby build on Vercel with Cloudflare DNS, and its DNS scorecard is grade A with overall 97, including DNSSEC, MTA-STS, TLS reporting, and enforced DMARC. GrowthBook uses a mixed Webflow and Next.js delivery stack with AWS Route 53 and multiple CDN signals including Cloudflare, Fastly, and CloudFront, and its app and docs subdomains return HTTP 200. PostHog leads on observed DNS and email security hygiene, but its app and us subdomains are only linked and not scanned. GrowthBook’s verified product and documentation surfaces give it a slight delivery edge. Slight edge: GrowthBook.
PostHog’s delivery stack uses Gatsby and React on Vercel, with Cloudflare DNS and Let’s Encrypt TLS on the main site. The DNS scorecard reports grade A with overall 97, DNSSEC visible, TLS valid, enforced HTTPS, SPF, DKIM, DMARC quarantine, MTA-STS, and TLS reporting. The app.posthog.com and us.posthog.com subdomains are linked but were not scanned, so product-surface delivery remains unverified.
PostHog Evidence:PostHog’s technology stack includes Vercel, Cloudflare DNS, Let’s Encrypt, Gatsby, and React across hosting, DNS, security, and framework categories. The DNS scorecard shows grade A overall 97, delivery 100, security 94, resilience 100, with CAA not configured as the top issue.
PostHog’s technology stack includes Vercel, Cloudflare DNS, Let’s Encrypt, Gatsby, and React across hosting, DNS, security, and framework categories. The DNS scorecard shows grade A overall 97, delivery 100, security 94, resilience 100, with CAA not configured as the top issue.
GrowthBook’s delivery stack combines Webflow and Next.js with AWS Route 53 as the DNS provider and Amazon-issued TLS. Hosting and CDN signals include Cloudflare, Fastly, CloudFront, jsDelivr, AWS CloudFront, UNPKG, and Webflow. The app.growthbook.io and docs.growthbook.io subdomains return HTTP 200, and shop.growthbook.io is verified.
GrowthBook Evidence:GrowthBook’s hosting and CDN category includes Cloudflare, Fastly, CloudFront, jsDelivr, AWS CloudFront, UNPKG, and Webflow, with AWS Route 53 as the DNS provider. The DNS scorecard reports grade A overall 94, delivery 100, security 86, resilience 100, with DNSSEC not visible and CAA not configured as top issues.
GrowthBook’s hosting and CDN category includes Cloudflare, Fastly, CloudFront, jsDelivr, AWS CloudFront, UNPKG, and Webflow, with AWS Route 53 as the DNS provider. The DNS scorecard reports grade A overall 94, delivery 100, security 86, resilience 100, with DNSSEC not visible and CAA not configured as top issues.
Content & SEO Scale
PostHog’s captured content surface is concentrated in buyer education, with blog and tutorial sections dominating the sample and a Google Analytics alternative page present as utility SEO. GrowthBook distributes content across buyer education, utility SEO comparison, role, industry, and platform sections, and maintains a verified developer documentation subdomain on Mintlify. PostHog’s education-led surface fits its self-serve motion, but no dedicated developer documentation section or docs subdomain was observed in the captured sample. GrowthBook’s content architecture is more complete for its mixed motion. Slight edge: GrowthBook.
PostHog’s captured content surface is dominated by buyer education sections, with blog and tutorial content representing the largest content buckets in the sampled main-site sitemap. A Google Analytics alternative page provides utility SEO, and pricing is the captured conversion section. No dedicated developer documentation section or docs subdomain was observed in the captured sample.
PostHog Evidence:PostHog’s captured sitemap sample includes blog, tutorial, founder, product-engineer, FAQ, and pricing sections, with blog and tutorial as the largest content categories. The technology stack includes Strapi, MDX, and Gatsby, supporting a content-driven main site, but no docs subdomain was observed in the captured sample.
PostHog’s captured sitemap sample includes blog, tutorial, founder, product-engineer, FAQ, and pricing sections, with blog and tutorial as the largest content categories. The technology stack includes Strapi, MDX, and Gatsby, supporting a content-driven main site, but no docs subdomain was observed in the captured sample.
GrowthBook’s content architecture spans buyer education, utility SEO, and developer documentation. The main sitemap sample includes blog, compare, customers, platform, industry, and roles sections, while docs.growthbook.io is a verified documentation subdomain built on Mintlify. Conversion content is present through demo, pricing, contact, and enterprise-assessment sections.
GrowthBook Evidence:GrowthBook’s sitemap sections include blog, compare, customers, platform, industry, roles, and products, with conversion sections demo, pricing, contact, and enterprise-assessment. The docs.growthbook.io subdomain returns HTTP 200 and uses Mintlify, while the main site also shows Webflow CMS and HubSpot CMS signals.
GrowthBook’s sitemap sections include blog, compare, customers, platform, industry, roles, and products, with conversion sections demo, pricing, contact, and enterprise-assessment. The docs.growthbook.io subdomain returns HTTP 200 and uses Mintlify, while the main site also shows Webflow CMS and HubSpot CMS signals.
Upgrade to Plus to unlock the full comparison
Create an account to unlock Growth Maturity, Enterprise Readiness, and the scored verdict.
Our team analyzed PostHog's tech stack on October 4, 2026. GrowthBook was analyzed on October 4, 2026 using the same methodology.
Our findings are based on publicly available signals — static code analysis, DNS profiling, and browser-level inspection — and do not guarantee 100% accuracy. Companies update their websites and infrastructure frequently, which may affect the information presented here. Our team continuously monitors changes and refreshes reports to keep them up to date.