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Amplitude vs FullStory

Self-host either: open-source alternatives compared. · Category: observability & analytics

Both Amplitude and FullStory are in the observability & analytics category. PostHog self-hosts as a replacement for both — listed below alongside the picks unique to each.

AmplitudeFullStory
CategoryProduct analytics / event tracking / funnelsSession replay + product analytics
SaaS pricing anchorFree tier up to 10M events/mo; Plus/Growth start at $49/mo and rise sharply with event volumeCustom pricing — typically $200-400/mo for small SMB; rises to thousands at scale
Self-host options listed33

Replaces both — 1 shared open-source pick

These open-source projects appear on both /amplitude/ and /fullstory/ — picking one solves the migration off either SaaS.

PostHogPostHog/posthogalivereplaces both

GitHub
★ 34.5k · last commit today
License
MIT
Setup time
20min docker-compose (the official `hobby` deploy is one command)
Monthly cost
$20-40 VPS — ClickHouse + Postgres + Kafka + Redis + the app; demanding stack but absorbs serious event volume.

Picks unique to each

Amplitude only

  • RudderStackalive
    AGPL-3.030min docker-compose (rudder-server + Postgres + transformer + control plane)$15 VPS for the server; storage is wherever you route events (BigQuery / Snowflake / your own Postgres).
  • Plausible Analyticsalive
    AGPL-3.010min docker-compose (Elixir app + ClickHouse + Postgres)$10 VPS; ClickHouse is the heaviest piece but tiny at startup volumes.

FullStory only

  • OpenReplayalive
    Elastic-2.01h docker-compose or k8s (multi-service: backend + Postgres + Redis + ClickHouse + MinIO)$30-80/mo VPS — ClickHouse + MinIO for session blobs are the cost line.
  • RRWeb (DIY)alive
    MIT2h — script install + ingest endpoint + storage + replay UI$5+ VPS plus storage — variable based on traffic.

In a terminal? npx os-alt amplitude or npx os-alt fullstory prints either side — how the CLI works →

FAQ

Which open-source self-host alternatives replace both Amplitude and FullStory?

1 open-source project appears on both /amplitude/ and /fullstory/: PostHog.

How many self-host alternatives are listed for Amplitude and FullStory?

3 for Amplitude, 3 for FullStory.

Are all the self-host alternatives free?

Yes — every listed option is open source. Your cost is the VPS or hardware that runs it.