Flowium

Retention marketing for ecommerce brands is the core work at Flowium, founded in 2017, which has served more than 1,000 brands and reports over $1 billion in revenue driven for its clients. The agency builds email-first lifecycle systems designed to increase repeat purchases, customer lifetime value, and long-term revenue without relying on new customer acquisition alone. Services span email marketing strategy and execution, SMS marketing, WhatsApp and RCS marketing, push notifications, Instagram DM automation, direct mail, Klaviyo setup and optimization, and email deliverability. The agency holds Klaviyo agency status and publishes case studies and an email showcase from its ecommerce client work. Transparent pricing, a two-year price lock guarantee, and no long-term contracts are part of its standard terms. A free email marketing audit is available to new prospects. The agency was named a 2025 Inc. 5000 Honoree. Rated 4.7 from 58 Google reviews, 53 of them five stars.