Letterhead vs Sailthru

Built for multi-newsletter editorial teams: Letterhead is purpose-built for publishers that manage entire portfolios of newsletters across brands and verticals. It brings production, layout, curation, and ad operations into one unified workflow. Sailthru focuses on automation and lifecycle messaging, but it lacks the tools needed to run an editorial program at scale.

Real workflow structure with roles, approvals, and reusable templates: Letterhead gives editors and producers the controls they need to move faster. Teams get templates, permissioned roles, approvals, and consistent layout systems that keep every edition on brand. Sailthru’s editor is designed for one-off marketing emails and does not support the depth of workflow that publishing teams require.

Revenue and sponsorship tools that drive publisher growth: Letterhead supports direct and programmatic ad inventory, sponsorship placement, partner integrations, and revenue reporting. Sailthru does not offer built-in monetization tools for newsletters, leaving teams to manage this work manually. Letterhead helps publishers increase yield while keeping production consistent.