Google Tag Manager is Google's free tag management system that deploys analytics, marketing, and third-party code through visual triggers, variables, and templates, so all pixels can be managed without editing site source code.
Google Tag Manager (GTM) is Google's free tag management system with 200+ built-in templates, letting you deploy GA4, Google Ads, and Facebook Pixel tags without editing code. It loads asynchronously at about 50KB and supports preview mode, versioning, and Server-Side Tagging.
Fathom Analytics is a privacy-first website analytics tool founded in Canada in 2018, tracking traffic without cookies with a script of only about 2KB and native GDPR compliance, while offering event-tracking APIs and webhooks for engineering integration, with subscriptions starting at about $14/month.
PostHog is an open-source product analytics platform founded in 2020 in San Francisco, USA, combining product analytics, session recording, feature flags, and A/B testing in one platform, with free self-hosting and cloud hosting, and 30,000+ GitHub stars.
Mixpanel was founded in San Francisco, United States in 2009 as a leading event-driven product analytics platform, serving 26,000+ business customers, covering events, funnels, retention, cohorts, A/B testing, and messaging, with a free plan of 100,000 MTU per month.
Matomo (formerly Piwik) was founded by Matthieu Aubry in 2007 in Auckland, New Zealand, as an open-source web analytics platform with 100% data ownership, used by 1,000,000+ websites, offering self-hosted and cloud deployment with GDPR compliance by default.
Amplitude is a product analytics platform founded in San Francisco in 2012 and listed on Nasdaq in 2021, known for its event-driven model with funnel, retention, path analysis, and A/B testing. The free tier offers 10,000 monthly events and Growth starts around $49-99 per month, making it a top choice for SaaS product teams.
Pirsch is a privacy-first web analytics brand founded in 2021 in Vienna, Austria; this document covers its privacy, self-hosting, and event-tracking depth - cookieless, about 4KB script, Go open-source self-hosting, and full data ownership.
Splitbee is a modern web and product analytics tool founded in Germany in 2020, offering event tracking, funnels, retention, A/B testing, and heatmaps with an about 5KB script, a free tier of about 10,000 events per month, and a GPL open-source self-hostable core.
Microanalytics is a US-based open-source lightweight web analytics tool that can be self-hosted with one-click Docker deployment, is cookie-less and GDPR/CCPA compliant, supports event tracking, and ships a tracking script under 2KB plus a free plan.
Metrical is a US-based privacy-friendly lightweight web analytics tool offering event tracking, heatmaps, and session recording, with a tracking script of about 1-2KB, cookie-less compliance by default, and a free plan to get started.