Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
Free tier available
Free tierFrom $24 per month (indicative, Growth by event volume)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Usage-based pricing per product with a substantial free tier; most small teams stay free indefinitely.
Event-volume pricing with an unusually generous free tier for early products.
Free tier
Large monthly free allowance across every product, plus free self-hosting.
Free plan with a large monthly event allowance.
Open source
MIT (core) / proprietary enterprise modules
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
PostHog · since 2020
Category standard
Mixpanel · since 2009
Strengths
Limitations
Best for
Startups and scale-ups consolidating analytics, replay and flags into one platform.
Product teams that want fast, self-serve behavioural reporting.
All of these integrate with: Segment, Snowflake, BigQuery, Slack.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.