Open source alternatives to Amplitude

2 projects on starwire do the same job. Ranked by how much of what Amplitude does each one covers, read from its README and website. Ties go to the most active.

What Amplitude does

Event tracking from appscore
Funnels and retention analysiscore
User cohorts and segments
Dashboards and charts
Experiments and feature flags
Session replay

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
posthogProduct analytics platform with session replay, feature flags and experiments	Replaces it88%	41k+94	19,161	today	100%	Hosted, free plan	Custom license
Covers 1 of 2 core jobs. Partly: Funnels and retention analysis.See the evidence Event tracking from appscoreYesAutocapture or manually instrument event-based analytics Funnels and retention analysiscorePartlyAnalyze the signup → payment funnel User cohorts and segmentsYesroll out features to select users or cohorts Dashboards and chartsYesAnalyze your data with visualizations or SQL Experiments and feature flagsYesFeature flags: Safely roll out features Session replayYesWatch real user sessions from your website or mobile app
posthog-fossRead-only mirror of PostHog with proprietary code removed, synced automatically	Replaces it75%	731+3	19,162	None	Too few	Hosted, free plan	MIT
Covers 0 of 2 core jobs. Partly: Event tracking from apps; Funnels and retention analysis.See the evidence Event tracking from appscorePartlyAutocapture or manually instrument event-based analytics Funnels and retention analysiscorePartlyTrack conversion, web vitals, and revenue. User cohorts and segmentsYesroll out features to select users or cohorts Dashboards and chartsYesAnalyze your data with visualizations or SQL Experiments and feature flagsYesFeature flags: Safely roll out features Session replayYesWatch real user sessions from your website or mobile app

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