True cost comparison — not just what the pricing page says
Quick Verdict
Amplitude saves you 5%
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
True Cost
$1000
/month (typical)
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
True Cost
$180
/month (typical)
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 | Amplitude |
| True Monthly Cost | $1000/mo | $180/mo | PostHog |
| Hidden Fee Total | +$1000/mo | +$180/mo | PostHog |
| # Hidden Fees | 3 | 3 | Amplitude |
| Confidence Score | 70% | 75% | PostHog |
| Pricing Tiers | 3 | 2 | — |
| Affiliate Program | None | None | — |
Amplitude advertises $0/mo and PostHog advertises $0/mo. However, when you include hidden fees, Amplitude has 3 documented hidden fees adding +$1000/mo, while PostHog has 3 hidden fees adding +$180/mo. Based on true cost, Amplitude is typically 5% cheaper.
Amplitude has 3 documented hidden fees: Opaque Growth Plan Pricing, Feature Flags & Experiments Add-On, CDP Add-On Costs. These add approximately +$1000/mo on top of the $0/mo advertised price.
PostHog has 3 documented hidden fees: Multiple Billing Meters, Session Replay Storage Costs, Data Pipeline Add-On. These add approximately +$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 based on manual research of official pricing pages, terms of service, and user reports. Amplitude data has a 70% confidence score and PostHog has 75%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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