Amplitude × Fishbrain

Amplitude x Fishbrain, retention lifted 50.6% at week 6

50.6% uplift in week 6 retention for users in treatment group over control

Stalled retention to sustained engagement uplift

Breakthrough Efficiency Written narrativeChallenge-Solution-ResultsEcommerce / Retail

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Full screenshot of Amplitude x Fishbrain, retention lifted 50.6% at week 6

Why it works

The case study earns credibility by grounding every claim in a controlled experiment structure, comparing treatment and control groups rather than reporting raw before-and-after numbers. The three headline metrics (retention uplift, email open rate, paid conversions) each measure a distinct layer of the funnel, which makes the story feel complete rather than cherry-picked. The 1300% email open rate figure is striking but contextually explained by the deliverability remediation work, which prevents it from reading as inflated.

Steal this

Anchor results to a treatment-versus-control framing. It signals rigor, makes the numbers credible, and removes the 'would have happened anyway' objection before a skeptical reader can raise it.

View the original on amplitude.com ↗

This is editorial commentary and curation. The case study, screenshot, and all metrics are Amplitude's published work; we link to the source and lead with our analysis.

Vendor Amplitude
Customer Fishbrain
Industry Ecommerce / Retail
Trigger Low user retention rate prompted engagement of external retention experts
Format Written narrative
Structure Challenge-Solution-Results
Medium Web page