Side-by-side comparison of free tiers, pricing changes, and stability. Catalogue dates here run to 2026-11-02.
Quick Verdict: PostHog gives 1M events/month with session replays, feature flags, and A/B testing included. Amplitude's Free plan gives 2M events and 10K session replays a month. PostHog is the better all-in-one value; Amplitude has deeper behavioral analytics.
1M analytics events, 5K session recordings, 1M feature flag requests, experiments billed with feature flags, 100K error tracking exceptions, 1,500 survey responses, 10 GB of logs, 100K AI observability (LLM tracing) events shared with evaluations, 1M data warehouse source rows, 10K destination events and 1M rows, 10K workflow messages per channel, 500 PostHog AI credits worth $5. All allowances reset monthly. The same allowance applies with or without a card on file. No credit card is required.
Self-driving uses AI credits at $0.01 each. The first month includes 1,000 credits worth $10, for up to 5 reports and 3 scouts. There is no recurring free tier after the first month. Pull requests are off by default and cost money when enabled. (From posthog.com/docs/self-driving/pricing, read 2026-11-10.)
Self-driving has a default $150 billing limit that can be changed on the billing settings page. When the limit is reached, new signals are dropped, scheduled scout runs are skipped, and research pauses. Signals past a limit are dropped, not queued, and never delivered after the reset. (From posthog.com/docs/self-driving/pricing, read 2026-11-10.)
The Free plan keeps events for 1 year. Organizations that start a paid plan on or after November 5, 2026, including upgrades from Free, keep events for 2 years by default (up to 3, 5 or 7 years with the Boost, Scale or Enterprise package); paid plans started before then keep 7 years. (From posthog.com/docs/data/events-retention, read 2026-11-11.)
Key Differences
Free tier: PostHog offers 1M events + 5K session replays + 1M feature flag requests — all included. Amplitude's Free plan offers 2M events + 10K session replays a month, with unlimited feature flags.
Product scope: PostHog bundles analytics, session replays, feature flags, A/B testing, and error tracking in one platform. Amplitude is analytics-focused; its Free plan includes 10K session replays a month.
Pricing model: PostHog charges per event. Amplitude's Free plan counts events (2M a month); its paid Plus plan is sized in MTUs or events.
Self-hosting: PostHog is open source (MIT core) and can be self-hosted. Amplitude is cloud-only.
Pricing Change History
Amplitude
restructureddiscovered 2026-09-09 · effective date unknownmedium impact
Amplitude renamed its Startup Scholarship "Early Stage Startup Pricing". The first year is still the full Growth plan free for startups with under 20 employees and under $10M raised; year 2 is now 40% off the annual Plus plan, or the free plan. Unconfirmed. We could not check this change against an archived copy of Amplitude's page, so it does not count toward the rating.Source ↗
increasedeffective 2026-08-04medium impact
Amplitude dropped the 10K MTU limit from its free plan between the Internet Archive's copies of its pricing page from 2026-06-08 and 2026-08-04: the Starter plan (10K MTUs, up to 2M events) became a Free plan of 2M events a month. Source ↗
reducedeffective 2026-04-27high impact
Amplitude cut its free Starter plan from up to 10M to up to 2M events a month between the Internet Archive's copies of its pricing page from 2026-04-12 and 2026-04-27. The 10K MTU limit stayed. Source ↗
reducedeffective 2026-02-14high impact
Amplitude cut its free Starter plan from 50K to 10K monthly tracked users (MTUs) between the Internet Archive's copies of its pricing page from 2026-01-24 and 2026-02-14. The plan still allowed up to 10M events a month. Source ↗
PostHog
No recorded pricing changes for PostHog.
Our Recommendation
Choose PostHog if you want an all-in-one product analytics platform, value open source, or want to replace multiple tools (analytics + replays + flags + A/B testing).
Choose Amplitude if you need deep behavioral analytics with advanced cohort analysis, or want the larger free event allowance (2M a month).
PostHog gives 1M events/month with session replays, feature flags, and A/B testing included. Amplitude's Free plan gives 2M events and 10K session replays a month. PostHog is the better all-in-one value; Amplitude has deeper behavioral analytics.
What is Amplitude's free tier?
Amplitude offers a Free plan: Product analytics — Free plan: 2M events a month, 10K session replays a month (1-month replay retention), unlimited feature flags, 1-year data access, 10 saved charts, unlimited team members. No credi...
What is PostHog's free tier?
PostHog offers a Free plan: 1M analytics events, 5K session recordings, 1M feature flag requests, experiments billed with feature flags, 100K error tracking exceptions, 1,500 survey responses, 10 GB of logs, 100K AI observabilit...
Should I choose Amplitude or PostHog?
Choose PostHog if you want an all-in-one product analytics platform, value open source, or want to replace multiple tools (analytics + replays + flags + A/B testing). Choose Amplitude if you need deep behavioral analytics with advanced cohort analysis, or want the larger free event allowance (2M a month).