PostHog

Free: PostHog Cloud free tier, resetting every month with no card: 1M analytics events, 5K session recordings, 1M feature flag requests (experiments billed with flags), 100K error tracking exceptions, 1,500 survey responses, 1M synced warehouse rows, 100K AI observability events, 10 GB of logs, 10K workflow messages per channel, plus small PostHog AI credit allowances. One project, 1-year event retention, 1-month recording retention, unlimited team members, community support. Usage past the limits is dropped, not billed.

Self-hosted: The hobby Docker Compose deploy is MIT (the ee/ directory is under a separate PostHog Enterprise license; posthog-foss is the MIT-only mirror). PostHog calls it officially unsupported: no tagged releases, no CVEs, no support tickets, no help recovering lost data, and all paid-plan features are Cloud-only. Docs ask for roughly a 4 vCPU, 16 GB RAM VM and recommend it only under 300K events, 1K recordings and 300K flag calls a month. New Kubernetes deployments are no longer supported.

Paid: Pay-as-you-go keeps the same free tier and bills usage above it: anonymous events $0.00005 each after 1M (identified events $0.000198 in the pricing calculator), volume tiers falling to $0.000009 past 250M; recordings $0.005; flag requests $0.0001; exceptions $0.00037; survey responses $0.10; synced rows $0.000015; logs $0.25/GB; AI observability events $0.00035. Adds 6 projects, 7-year event retention, 90-day recording retention and email support, with per-product billing limits. Platform packages are monthly: Boost $250/mo (unlimited projects, SSO enforcement, white labeling, HIPAA BAA), Scale $750/mo (SAML SSO, priority support), Enterprise custom (RBAC, SCIM, dedicated support). Annual commitments and volume discounts by sales.