PostHog vs Mixpanel vs Amplitude — UK Product Analytics (2025)
PostHog (self-hosted or EU cloud) is the right default for UK regulated software: EU data residency, open-source (can be audited), session replay included, and the only major product analytics tool that can be fully self-hosted in AWS eu-west-2 (zero third-party data processing). Mixpanel and Amplitude are right when the team values their specific analytics features and is comfortable with US-hosted data transfer mechanisms. For NHS and FCA regulated software: PostHog self-hosted in eu-west-2. UK product analytics platform choice affects UK GDPR data residency, PECR cookie consent requirements, and NHS DTAC compliance. Here is a 2025 UK comparison.
| Factor | PostHog (self-hosted) | Mixpanel (EU hosting) | Amplitude (EU hosting) |
|---|---|---|---|
| UK GDPR data residency | ✅ Self-hosted eu-west-2 — no third party | EU hosting — DPA available | EU hosting — DPA available |
| NHS / FCA data residency | ✅ Best — no data leaves AWS account | Acceptable — EU DPA | Acceptable — EU DPA |
| PECR cookie consent | ✅ Can be cookieless (server-side) | Cookies required | Cookies required |
| Session replay | ✅ Included — no extra cost | Enterprise only | Enterprise add-on |
| Feature flags | ✅ Included | Not native | Not native |
| A/B testing | ✅ Included | Via third-party | Enterprise plan |
| Self-hosted option | ✅ Docker / Kubernetes — full control | No | No |
| Open source (auditable) | ✅ Full MIT licence | No | No |
| ClickMasters default | ✅ All UK regulated + NHS/FCA | Non-regulated with Mixpanel-familiar team | Non-regulated with Amplitude-familiar team |
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