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testcritic

Mixpanel vs Heap

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 tier

Free tier available

Free tier

What drives the bill

The metric that actually scales your invoice.

Growth now starts at $0 and scales with event volume up to 20M events a month, with the first million free; annual billing saves around $480 a year. Enterprise is quote-based. Event-volume pricing stays generous for early products but climbs with a chatty event schema.

Paid tiers are quote-based by session volume.

Free tier

Free forever, up to 1M events a month.

Free plan with a monthly session limit.

Open source

Self-hostable

No-code authoring

Languages

JavaScriptTypeScriptPythonJavaSwiftKotlinPHP
JavaScriptSwiftKotlin

Platforms

WebAPIiOSAndroid
WebiOSAndroid

Fits teams

StartupScale-up / mid-marketEnterprise
Scale-up / mid-marketEnterprise

Adoption

Category standard

Mixpanel · since 2009

Widely used

Contentsquare · since 2013

Strengths

  • Genuinely self-serve — product managers build their own reports without help.
  • Large free tier that carries an early-stage product a long way.
  • Fast query performance on large event volumes.
  • Retroactive event definition eliminates 'we didn't track that' entirely.
  • Very fast time to first insight — no instrumentation project required.
  • Warehouse sync for teams that want the raw data.

Limitations

  • Requires disciplined event instrumentation and naming.
  • Weaker on user-level qualitative investigation than replay tools.
  • Costs scale with event volume, which grows faster than user count.
  • Autocaptured data needs governance or the event list becomes unusable noise.
  • Session-based pricing on high-traffic products.
  • Acquisition means overlap with Contentsquare's own products.

Best for

Product teams that want fast, self-serve behavioural reporting.

Product teams that want analytics without an instrumentation backlog.

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.