Amplitude vs Fathom Analytics

Amplitude Experiment tracks both the primary metric and predefined guardrails in parallel, stopping a winning A/B test if a guardrail metric like session length drops below threshold.

Amplitude's predictive cohorts identify users with high churn probability based on behavioral signals, letting growth teams trigger retention campaigns before the user goes inactive.

Amplitude stitches anonymous and identified events across web and mobile using Amplitude ID, showing the true cross-platform conversion funnel instead of inflated session counts.

Fathom routes EU visitor data through EU servers with no US data transfers, satisfying legal review for GDPR-compliant analytics without a data processing amendment.

One Fathom account tracks unlimited sites under a single billing line, letting agencies add a new client domain without provisioning separate accounts or managing multiple dashboards.

Fathom processes every hit without sampling, so low-traffic pages and campaign landing pages report accurate visitor counts rather than statistical approximations.