PostHog vs RudderStack
PostHog
Open-source platform bundling product analytics, session replay, feature flags, experiments, and surveys on a single ClickHouse-backed event store.
Full directory entry →RudderStack
A warehouse-first customer data platform that streams events through Segment-compatible SDKs and lands the raw data in a warehouse you own.
Full directory entry →Facts, side by side
| PostHog | RudderStack | |
|---|---|---|
| Pricing model | freemium | freemium |
| Pricing notes | Usage-based per product with monthly free allowances on Cloud (1M analytics events, 5K replays, 1M flag requests, 1.5K survey responses); per-unit rates fall with volume and anonymous events are billed cheaper than identified ones. The open-source Docker deploy is free. | Free tier up to 250K events/month. Growth starts at $265/month, sold in event-volume tiers from 1M to 25M events/month (annual billing discounted). Enterprise is custom-quoted and gates Profiles, Data Apps, HIPAA, SSO, and 5-minute warehouse syncs. |
| Open source | Yes | No |
| Self-hostable | Partial — A Docker Compose hobby deploy is supported at small scale; large self-hosted instances are no longer sold or supported as a paid product. | Partial — The core event pipeline (rudder-server) is source-available under the Elastic License 2.0 and can be self-hosted; Profiles, reverse ETL, and the managed control plane are cloud features. |
| Categories | Product analytics, Session replay, Experimentation | CDP |
| Who it's for | implementation engineers, data engineers, measurement managers | data engineers, implementation engineers |
| Integrations listed | 5 | 10 |
Directory entries last updated: PostHog 2026-07-18 · RudderStack 2026-07-18.
In brief
PostHog — Open-source platform bundling product analytics, session replay, feature flags, experiments, and surveys on a single ClickHouse-backed event store. Pricing: freemium. Usage-based per product with monthly free allowances on Cloud (1M analytics events, 5K replays, 1M flag requests, 1.5K survey responses); per-unit rates fall with volume and anonymous events are billed cheaper than identified ones. The open-source Docker deploy is free. Self-hosting: Partial — A Docker Compose hobby deploy is supported at small scale; large self-hosted instances are no longer sold or supported as a paid product.. Listed integrations: segment, rudderstack, bigquery, snowflake, hightouch.
RudderStack — A warehouse-first customer data platform that streams events through Segment-compatible SDKs and lands the raw data in a warehouse you own. Pricing: freemium. Free tier up to 250K events/month. Growth starts at $265/month, sold in event-volume tiers from 1M to 25M events/month (annual billing discounted). Enterprise is custom-quoted and gates Profiles, Data Apps, HIPAA, SSO, and 5-minute warehouse syncs. Self-hosting: Partial — The core event pipeline (rudder-server) is source-available under the Elastic License 2.0 and can be self-hosted; Profiles, reverse ETL, and the managed control plane are cloud features.. Listed integrations: bigquery, snowflake, redshift, databricks, clickhouse, amplitude, mixpanel, google-analytics-4, braze, hubspot.
Which one, when
Derived mechanically from the structured facts above — deltas only, not an editorial verdict. Where the facts tie, read both entries.
- you want an open-source codebase — RudderStack is not open source
- you also need Product analytics, Session replay, Experimentation — not a listed category for RudderStack
- its entry lists measurement managers in "who it's for"; RudderStack's does not
- you also need CDP — not a listed category for PostHog
Also compare
POSTHOG VS: Amplitude · Fullstory · GrowthBook · Heap · Hotjar · LogRocket · Microsoft Clarity · Mixpanel · Optimizely · Segment · Snowplow · Statsig · VWO
RUDDERSTACK VS: Census · Google Tag Manager (Server-Side) · Hightouch · mParticle · Segment · Snowplow