Overview
The short version
PostHog: PostHog is a product-analytics platform that bundles product analytics, session replay, feature flags, experiments, surveys, error tracking and more. It is priced by usage per product, with a free allowance on each. It is built for product and engineering teams and has a wide surface area.
OnyxMetric: a paid web and product analytics platform with cookieless tracking, session replay on the Pro tier, funnels, retention, goals, events, Web Vitals, error tracking, feature flags and experiments, Google Search Console data and an MCP server for AI assistants. Pricing is per site per month: Base $99, Plus $199, Pro $299.
PostHog fits best when: Product and engineering teams that want one platform for analytics, flags, experiments and surveys, and accept usage-based billing.
Feature comparison
| Feature | OnyxMetric | PostHog |
|---|---|---|
| Pricing model | Per site per month: Base $99, Plus $199, Pro $299. Yearly is 10x monthly. | Usage-based per product, with free allowances. |
| Cookieless by default | No cookies, no consent banner for analytics. | Cookieless mode is an option. |
| Session replay | Included on the Pro tier. | |
| Funnels | ||
| Retention | ||
| Feature flags and experiments | ||
| Web Vitals | ||
| Error tracking |
PostHog details reflect public information at time of writing and may have changed. Confirm on the PostHog site. A dash means partial or optional. Rows with no verified data for a product are omitted.
Which one should you pick?
Choose PostHog if
- You need surveys, a data warehouse or a very wide product toolkit.
- Usage-based billing with free monthly allowances suits your volume.
- Your team wants to configure many products and tune each one.
Choose OnyxMetric if
- A flat, predictable per-site price instead of billing per product and per event.
- A focused web-analytics experience with replay, funnels and flags without a large setup.
- Google Search Console data next to your traffic reports.
FAQ