Sumezi started with a simple frustration: a newsletter that looks right everywhere, except in Outlook. We built the tool we wished we had.
The big suites do too much: automation, CRM, analytics, and a price that climbs with features you never touch. The open-source tools often do too little, or leave you alone with raw HTML. In between there was a gap.
Sumezi fills that gap with one sharp focus: designing and sending newsletters that look right everywhere. An editor with a block model that compiles to tested, bulletproof HTML. Nothing more, and certainly nothing less.
No scope creep. We build the best editor, not the widest suite.
What arrives is what counts. We test where it breaks, not where it's easy.
A pro tool can be calm. Lots of whitespace, little noise.
Sumezi doesn't stand alone. It's part of the SIMEZU ecosystem. the integration layer that handles identity, subscriptions and payments.
The foundation. SIMEZU handles your account and sign-in (SSO), your subscription and billing, and the per-tenant SMTP connection. One identity across every connected product.
The product where you do the work. Sumezi takes identity and billing from SIMEZU and focuses entirely on the editor, your subscribers, and sending. Sign-in is an SSO redirect, plan & usage are shown read-only, and upgrading goes to SIMEZU.