Estimated monthly cost comparison — not just the headline price
Prices change often — confirm on the vendor's site before buying. Report incorrect pricing →
Quick Take
PostHog has the lower estimated monthly cost (~82%)
Based on advertised price plus documented recurring fees, not your exact usage.
Best for Amplitude
Product analytics platform for digital products. Free for 50K monthly tracked users, then usage-base
Best for PostHog
Open-source product analytics suite. Generous free tier with 1M events/mo, then usage-based pricing
Product analytics platform for digital products. Free for 50K monthly tracked us...
Advertised
$0
/month
Estimated monthly cost
$1,000
/month (illustrative)
Opaque Growth Plan Pricing
Growth plan pricing is custom and based on monthly tracked users (MTUs). Estimates range from $500-$...
Feature Flags & Experiments Add-On
Amplitude Experiment (A/B testing, feature flags) is a separate product with its own pricing. Not in...
CDP Add-On Costs
Amplitude CDP (Customer Data Platform) for data unification and audience syncing is priced separatel...
Open-source product analytics suite. Generous free tier with 1M events/mo, then ...
Advertised
$0
/month
Estimated monthly cost
$180
/month (illustrative)
Multiple Billing Meters
PostHog bills separately for: analytics events ($0.00031/event), session replays ($0.005/recording),...
Session Replay Storage Costs
Session replays cost $0.005/recording after free 5K/mo. High-traffic sites recording 50K sessions/mo...
Data Pipeline Add-On
Exporting data to external data warehouses (BigQuery, Snowflake, S3) requires the data pipeline add-...
Amplitude advertises $0/mo. PostHog advertises $0/mo.
Amplitude has 3 documented hidden fees. PostHog has 3.
Amplitude confidence: 70%. PostHog confidence: 75%.
| Metric | Amplitude | PostHog | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $0/mo | — |
| Estimated Monthly Cost | $1,000/mo | $180/mo | PostHog |
| Recurring Extra Fees | +$1,000/mo | +$180/mo | PostHog |
| One-Time Costs | $0 | $0 | — |
| # Documented Fees | 3 | 3 | — |
| Pricing Tiers | 3 | 2 | — |
| Affiliate Program | None | None | — |
Amplitude advertises $0/mo and PostHog advertises $0/mo. Amplitude has 3 documented extra fees (recurring: +$1,000/mo), while PostHog has 3 (recurring: +$180/mo). On these illustrative assumptions, PostHog has the lower estimated monthly cost (about 82% less). Your real cost depends on seats and usage — use the calculator for your numbers.
Amplitude has 3 documented extra fees: Opaque Growth Plan Pricing, Feature Flags & Experiments Add-On, CDP Add-On Costs. Recurring fees add roughly $1,000/mo on top of the $0/mo advertised price.
PostHog has 3 documented extra fees: Multiple Billing Meters, Session Replay Storage Costs, Data Pipeline Add-On. Recurring fees add roughly $180/mo on top of the $0/mo advertised price.
Choose Amplitude if: Product analytics platform for digital products. Free for 50K monthly tracked users, then usage-base. Choose PostHog if: Open-source product analytics suite. Generous free tier with 1M events/mo, then usage-based pricing . The right choice depends on your team size, usage volume, and which features you need most.
This comparison is compiled from public vendor pricing pages and documentation. It uses illustrative assumptions (see "Cost Comparison Summary"), not your exact seats or usage, and vendor prices change often. Confirm current prices on each vendor's site, and use our calculator with your own usage for a closer estimate. Spotted an error? Email hello@trulycritic.com.
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