Comparison

Amplitude vs PostHog

Amplitude and PostHog both land on Depends.

Amplitude

Depends

Confidence: Medium

Buy it if you run a product-led team with real traffic and someone who owns event data.

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PostHog

Depends

Confidence: Medium

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

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Amplitude versus PostHog
Compare	Amplitude	PostHog
Verdict	Depends	Depends
Best for	Product-led growth teams	Product-engineering teams
Who it's not for	Small startups with low traffic	Marketing teams wanting only simple web analytics
Privacy	No confirmed platform breach found; one flagged malicious npm package and one SDK privacy lawsuit exist in sources.¹¹	Open source with a public security page; one NVD-listed CVE (2025) surfaced in vulnerability feeds.
Support quality	No direct support evidence found	No credible support-quality evidence found
Public sentiment	Product teams at scale rate it highly but repeatedly flag instrumentation effort and escalating costs.^¹	Independent sentiment is sparse but positive . engineers name PostHog their first pick for instrumenting analytics from scratch.
Biggest gotcha	Event-based pricing balloons with traffic; enterprise contracts reportedly $5k-$70k/year.¹⁰	Usage-based bills scale with events and replays; monthly free allowances only cover early-stage volumes.

Pick Amplitude when

Product-led growth teams
High-traffic apps
Teams with a data analyst
Experimentation-heavy orgs

When Amplitude is not a fit

Small startups with low traffic
Teams with nobody owning event instrumentation
Simple sites needing basic page analytics
Buyers allergic to usage-based pricing

Pick PostHog when

Product-engineering teams
Startups consolidating analytics, replay, and flags
Teams leaving GA4
Open-source buyers

When PostHog is not a fit

Marketing teams wanting only simple web analytics
Non-technical buyers . it is built for product engineers
Anyone needing flat, predictable monthly bills
Buyers sold on proven auto-fix AI . it is new

Sources

Amplitude Analytics Reviews 2026 . G2g2.com
review
Amplitude Analytics Reviews & Ratings . Gartner Peer Insightsgartner.com
review
Amplitude Analytics Reviews . Trustpilottrustpilot.com
review
I think our Amplitude events are garbage . Redditreddit.com
review
Deciding between Amplitude, Mixpanel, PostHog . Redditreddit.com
review
Amplitude Pricingamplitude.com
official
Amplitude Plus self-serve planamplitude.com
official
Amplitude Customersamplitude.com
official
Amplitude Careers (customer list)amplitude.com
official
Amplitude Pricing Guide . SpendFlospendflo.com
news
Malicious Package in amplitude-experiment . Snyksecurity.snyk.io
security
Amplitude Snares Private Data of Millions Via Apps . Bloomberg Lawnews.bloomberglaw.com
security
The 7 best Amplitude alternatives . Mixpanelmixpanel.com
review
Amplitude 2026 funding . Tracxntracxn.com
news
PostHog homepageposthog.com
official
PostHog on GitHub (open source)github.com
official