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.
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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.