At The Clever Inbox, we build retention architectures that turn email and SMS into predictable profit engines.
Our work blends lifecycle strategy, behavioural segmentation, data clarity, and conversion psychology — creating systems that increase customer value without relying on higher ad spend.
Retention isn’t an add-on.
It’s an operating system.
We build it for you.




Lifecycle architecture and retention planning designed to maximise LTV through structured customer paths and inbox performance frameworks.
Behavioural and value-based segmentation that delivers personalised messaging at the perfect moment for the highest conversion impact.
Advanced email & SMS flows engineered for predictable revenue—always-on lifecycle journeys that build loyalty and repeat buying.
Clean design and psychology-driven copy that drives action and reinforces brand value across every send.
Strategic storytelling that builds trust, differentiates your brand, and converts attention into loyalty.
Continuous testing, analysis, and refinement to sharpen targeting, improve engagement, and drive measurable LTV uplift.
Technical foundation setup for your email & SMS ecosystem: clean data, structured systems, and optimal ESP performance.
Clear, actionable reporting grounded in data—giving you visibility, clarity, and direction for ongoing retention growth.
“Love working with The Clever Inbox. Extremely proactive, fast, and sharp. They understand the crypto + iGaming lifecycle better than any agency we’ve tried. Their segmentation, flows, and retention strategy are elite.”

CMO — CasinoBet
"The Clever Inbox have been a game changer. They're true experts in email, SMS, and lifecycle strategy not just campaign senders. Super responsive, full of smart suggestions, and always pushing our retention numbers forward. Creative is clean, strategy is solid, and nothing is ever too much trouble. Easily one of the best partners we've worked with."

Head of Propositions — Entain
“Brilliant team to work with. The Clever Inbox dig deep into data, customer behaviour, and journey mapping. Their ideas are always thoughtful, strategic, and backed by clear logic. They’ve helped us tighten our propositions.”
Blane CassarHead of Marketing — Duelbits