Lettium and Postcards
Postcards generates email layouts with AI. Lettium drafts a layout on an email-aware canvas and keeps comments pinned to the design.
Comments, versions, HTML handoff, and test send checked 29 Oct 2026. AI layout, rendering previews, and formal sign-off stay on the 8 Oct 2026 review.
Where they differ
Postcards offers prompt-to-layout, chat-based refinement, collaborator cursors, and exports to 20 or more ESPs. Its preview covers 4 clients. Formal sign-off is not in the tool. Postcards pushes sign-off out through PDF or PNG.
Postcards documents comments pinned on the design, a test email, and HTML handoff by ZIP, copied code, or an ESP. Version history restores a timestamped autosave.
Partial on named versions means a documented restore of timestamped or numbered saves, without a documented name you choose. Partial on client rendering previews means Postcards documents a 4-client preview and Beefree documents a preview. Partial on formal sign-off means Stripo documents share-link approval only.
Beefree formal sign-off is Business and above, from a third-party review on 8 Oct 2026. Re-check it after the RGE Studio rebrand.
| Tool | AI layout from a prompt | Layout tidy that does not rewrite copy | Comments on the design | Named versions | Table HTML handoff | One test send | Client rendering previews | Formal sign-off |
|---|---|---|---|---|---|---|---|---|
| Lettium | Yes | Yes | Yes | Yes | Yes | Yes | No | No |
| Postcards | Yes | No | Yes | Partial | Yes | Yes | Partial | No |
| Stripo | No | No | Yes | Yes | Yes | Yes | Yes | Partial |
| Beefree | No | No | Yes | Partial | Yes | Yes | Partial | Yes |
| Chamaileon | No | No | Yes | No | Yes | Yes | No | Yes |
Where Lettium fits
Use Lettium when you want the draft on a canvas built for email structure, a tidy pass that does not rewrite copy, and comments pinned to the design.
What Lettium does not do yet
Lettium does not include formal sign-off, client rendering previews, or synced modules. A test send is one message, not a preview of every inbox.
Questions
- Does Postcards generate layouts?
- Yes. The 8 Oct 2026 review found prompt-to-layout and chat-based refinement in Postcards.
- What does Lettium add beside generation?
- An email-aware canvas, layout tidy that does not rewrite copy, comments pinned to the design, and named versions.
- Does Lettium include formal sign-off?
- No. Comments stay on the canvas. Lettium does not include a formal sign-off step.