Lettium and Stripo
Stripo tests rendering in many inboxes and syncs modules. Lettium is a design canvas with layout AI, pinned comments, and table handoff.
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
Stripo documents rendering tests for 98 to 100 or more clients, synced modules, roles, and share-link approval. AI there is copy and images, not a layout canvas.
Stripo documents comments pinned on the template, versions you can name and restore, a test email to an inbox, and HTML export to an ESP or as a file.
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 to compose the layout on a canvas and draft it from a prompt. The 8 Oct 2026 review did not find that layout AI in Stripo.
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 Stripo test rendering?
- Yes. The 8 Oct 2026 review credits Stripo with rendering tests across 98 to 100 or more clients.
- Does Stripo draft a full layout from a prompt?
- The review found copy and image AI only, not layout generation.
- Does Lettium test every inbox?
- No. Lettium sends one test email. It does not include client rendering previews.