Comparison

Fullstory vs PostHog

Fullstory and PostHog both land on Depends.

Fullstory

Depends

Confidence: Medium

Buy it if you are a mid-size or enterprise product team that will assign people to actually mine session data.

Depends

Confidence: Medium

Product engineers at software startups should buy . real free tier, easy setup, analytics through data warehouse in one tool.

Fullstory versus PostHog
Compare	Fullstory	PostHog
Verdict	Depends	Depends
Best for	Enterprise product and engineering teams	Product-engineering teams
Who it's not for	Small startups wanting quick, cheap insights	Marketing teams wanting only simple web analytics
Privacy	No known public vulnerabilities found in the sources reviewed; trust center and breach-response plan published, but one privacy lawsuit alleges covert visitor recording.¹⁰	Open source with a public security page; one NVD-listed CVE (2025) surfaced in vulnerability feeds.¹⁶
Support quality	Aggregated reviews rank support top strength	No credible support-quality evidence found
Public sentiment	Users praise the capture depth, ease of use, and support but complain sessions pile up unwatched without dedicated analysts.^⁶	Independent sentiment is sparse but positive . engineers name PostHog their first pick for instrumenting analytics from scratch.
Biggest gotcha	No public pricing; enterprise contracts likely scale with captured sessions . negotiate hard before signing^³	Usage-based bills scale with events and replays; monthly free allowances only cover early-stage volumes.