Amplitude
Enterprise product analytics + CDP
PostHog
Open-source product analytics + flags
Amplitude is the enterprise product-analytics and CDP standard — deep segmentation, behavioral cohorts, and a mature governance story. PostHog is the open-source all-in-one — analytics + flags + replay + experiments. Amplitude wins on depth of analysis + enterprise; PostHog wins on cost + bundled features.
Pick Amplitude when you want enterprise-grade segmentation, governance, and Amplitude CDP.
Pick PostHog when you want open-source, self-host, or bundled analytics + flags + replay.
| Feature | 📉Amplitude | 🦔PostHog | Winner |
|---|---|---|---|
| Enterprise analytics depth | Industry standard | Good and growing | A |
| Open source / self-host | No | Yes | B |
| Feature flags | Separate product (Experiment) | Included | B |
| Session replay | Yes (paid) | Included | B |
| CDP | Amplitude CDP (mature) | Data pipelines | A |
| Free tier | 10M events/mo | 1M events/mo | A |
| Pricing at scale | Expensive | More predictable | B |
| Governance / taxonomies | Strong | Basic | A |
Enterprise analytics depth
AAmplitude
Industry standard
PostHog
Good and growing
Open source / self-host
BAmplitude
No
PostHog
Yes
Feature flags
BAmplitude
Separate product (Experiment)
PostHog
Included
Session replay
BAmplitude
Yes (paid)
PostHog
Included
CDP
AAmplitude
Amplitude CDP (mature)
PostHog
Data pipelines
Free tier
AAmplitude
10M events/mo
PostHog
1M events/mo
Pricing at scale
BAmplitude
Expensive
PostHog
More predictable
Governance / taxonomies
AAmplitude
Strong
PostHog
Basic
Best for
Best for
Both use similar event-tracking SDKs. Swap in @posthog/js (or reverse), unify your event schema. For historical data, both have bulk-import APIs. Experiments and flags only migrate between tools that have them — Amplitude Experiment ↔ PostHog Feature Flags takes a mapping script. Budget 2-6 weeks for a complete move with dashboards + governance rebuild.
Amplitude is the enterprise product-analytics and CDP standard — deep segmentation, behavioral cohorts, and a mature governance story. PostHog is the open-source all-in-one — analytics + flags + replay + experiments. Amplitude wins on depth of analysis + enterprise; PostHog wins on cost + bundled features. In short: Amplitude — Enterprise product analytics + CDP. PostHog — Open-source product analytics + flags.
Pick Amplitude when you want enterprise-grade segmentation, governance, and Amplitude CDP.
Pick PostHog when you want open-source, self-host, or bundled analytics + flags + replay.
Both use similar event-tracking SDKs. Swap in @posthog/js (or reverse), unify your event schema. For historical data, both have bulk-import APIs. Experiments and flags only migrate between tools that have them — Amplitude Experiment ↔ PostHog Feature Flags takes a mapping script. Budget 2-6 weeks for a complete move with dashboards + governance rebuild.
Yes. Both have MCP servers installable via MCPizy (mcpizy install amplitude and mcpizy install posthog). They work identically across Claude Code, Claude Desktop, Cursor, Windsurf, and any other MCP-compatible client. You can install both side by side and route queries in your agent's prompt.
PostHog is the open-source all-in-one product analytics — events, funnels, feature flags, session replay, A/B tests, even a heatmap. Mixpanel is the polished dedicated product-analytics suite with the best query UX. PostHog wins on self-host + bundled features; Mixpanel wins on polish.
GA4 is free web-and-app analytics tied to the Google ecosystem (Ads, BigQuery export, Search Console). PostHog is product analytics — event-first, user-identified, with flags + replay + experiments. GA4 wins for marketing / SEO / Ads attribution. PostHog wins for product-led and engineering-first teams.
Not sure? Run both side by side — swap between them in your AI agent with a single config line.