The use case: how GuestReady deploys Customer.io
GuestReady replaced a once-a-month manual email blast with behavioral lifecycle journeys in Customer.io, including a subscription preference center, onboarding, newsletters, check-in and post-stay messages, and a multi-language abandoned cart flow.
More reported results
Figures published in Customer.io’s case study. They are not independently measured by usedby.
The early results from V1 (the simpler version the team used to validate the approach) were a 58% open rate and a 2.5% conversion rate.
V2, which launched in early 2026, is currently tracking at 52.8% open rate and 1.6% conversion.
Across their priority markets, that adds up to 35 distinct variants running inside a single workflow, available in four languages.
In the customer’s words
We realized that giving guests more control over what they received didn't mean we'd hear from them less. It meant the people who stayed on the list were actually engaged. That was the foundation we needed to build everything else on.Other companies using Customer.io
Customers across industries, with public evidence.
BufferConfirmed
Cosentino's Food GroupConfirmed
Georgia AquariumConfirmed
Kinnect.ClubConfirmed
KlarConfirmed
LivestormConfirmedGo straight to the source
Based on Customer.io’s published case study. We check the public evidence; the results are reported by the vendor.
customer.io- Source published
- Jun 8, 2026
- Last checked
- Nov 12, 2026
Open source capture What the story claims, and what we checked
What we compared with the page.
- The figure: 64%Checked
The figure is on the page; its label is our wording.
- The passage quoted aboveChecked
Copied word for word from the page, near the name of GuestReady.
- The publication dateChecked
Read from the page’s own metadata, never guessed.
- GuestReady uses Customer.ioChecked
Confirmed line.
- The result itselfNot checked
We quote it; we did not measure it.
By setting up a subscription preference center that lets guests opt into specific content types–travel inspiration, flash sales, or both–rather than forcing an all-or-nothing unsubscribe decision. GuestReady cut their unsubscribe rate by 64%