Flowium
A Klaviyo retention specialist covering email, SMS, push, and direct mail, with no long term contracts.
At a glance
- Headquarters
- Staten Island, United States
- Team size
- 11 to 50
- Founded
- 2017
Services
- Email and SMS
Our take
Flowium is built around Klaviyo and runs retention across email, SMS, push, WhatsApp, and direct mail. It advertises no long term contracts and a two year price lock, which lowers the risk of trying an outside team on retention.
Its published case studies are anonymised by category, so ask for references from brands in your space.
Featured on
Details last checked October 2026. How we choose agencies
Is this your agency?
Claim the listing to correct the details, or ask us to take it down. We act on every request within five working days.