Update: Detailed Technical Proposal Attached

Following up on my previous comment: I have prepared a full strategic technical proposal for the Proton Product team.

It outlines exactly how to integrate Markzware's API to solve the October 2026 Microsoft Publisher crisis securely, including:

The $15B+ market opportunity for Legal, Healthcare, and SMBs.
The Zero-Knowledge architecture required for compliance.
A 3-month roadmap to launch before the deadline.

Read the full proposal here: https://tinyurl.com/mu7uf83t

I hope this accelerates the review process. The clock is ticking!

Lumo would be even more useful if Proton expanded file support in two ways.

First, the basics should work smoothly for everyday users. Common screenshot and image uploads should be accepted reliably, and file extensions should be handled case-insensitively, so .png and .PNG are treated the same.

Second, there is an opportunity for Lumo to support more complex, layout-rich business documents, not just simple text and standard office files. Currently, many AI tools still struggle with complex, layout-rich document types, which limits their usefulness for real-world business content. Expanding into this area would make Lumo more practical for real document workflows.

This is becoming urgent: Microsoft is ending support for Publisher in October 2026. This creates an immediate crisis for millions of organizations (hospitals, law firms, schools) that hold decades of archives in .pub files.

The Opportunity: By integrating specialized conversion tech (like Markzware's) now, Lumo can become the only privacy-first platform capable of saving these critical business archives before they become unreadable. This moves Lumo from a "chat tool" to a mission-critical continuity solution for the enterprise market.

One possible way to address this would be to explore specialized document-conversion and structured-content extraction technology, including solutions from companies like Markzware, which work with formats such as Microsoft Publisher, Adobe InDesign, QuarkXPress, Affinity Publisher, and PDF documents.

That kind of capability could help Lumo move beyond basic chat uploads and toward becoming a more valuable privacy-focused workspace for analyzing, reusing, and understanding important legacy and document-based content.

For me, PNG is fundamental because many applications, when they fail, do not always allow you to select the message. Being able to swipe a screenshot to detect the text is essential. Another use case is how many times we receive IDs or numbers of operations or sensible data to work with them in a photo of a coworker?... Being private Lumo, it would be a key functionality for this case as well, as it is often sensitive data.

would be great if it could export back translated pdf files.

This would make me use Lumo a LOT more

I would love to use Lumo as a code assistant, but it currently does not support Python notebook (IPYNB) files. It would be great if Lumo supported IPYNB files.

das hochladen von screenshots ist sehr wichtig bei der Problemlösung! jpg, png, ...
Bitte unbedingt zur Verfügung stellen!

Yes, image formats seem to be a problem. I wanted to test Lumo's ability to decipher handwriting — which is deficient for now! — and it was a real song and dance to import the file.

I've tried uploading an RTF file. Lumo refuses, says it can't deal. Silly.

Absolutely crucial that you can send screenshots in any image format!

After contact with Proton Support these are the currently supported file types within Lumo.

pdf
doc, docx, odt
rtf
xls, xlsx, csv
ppt, pptx
txt
log
md, markdown
html, htm
latex, tex
rst
css
js, mjs, jsx, ts, tsx, json
xml, yaml, yml, toml
ini, cfg, conf, properties, env
py, java, cpp, c, h, hpp, cs, php, rb, go, rs, swift, kt, scala, clj, hs, ml, r, sql
sh, bash, zsh, fish
ps1, bat, cmd
dockerfile, makefile, cmake, gradle, maven, sbt, cargo
lock, gitignore

These are all text based files. Proton could not provide a time frame to implement more file types in the future, depending on customers reports.

I have never been able to get it to accept any image format. Have you?

Yes, this is very frustrating. I’m trying to upload an image to lumo and I only get file not supported error even if I upload in suggested file formats like jpg and png.
Even if I put the image on proton drive or Dropbox it still refuses to download the image. I have saved the image in the right formats. Even did an export from photoshop to be sure it was exported in the right way. Still not supported.
This must be such a basic thing that should just work.