A sorted inbox
Priority and Others, Smart Stacks and labels from a model that runs on your computer. Move a thread once and Lumen learns that sender.
Lumen
In development
Mac/Windows/Linux
Email that feels calm, not urgent.
Lumen keeps every email on your computer and uses your own AI to sort, summarise, draft and protect, so you only deal with what needs you.
Written by Ollama
llama3.1 8B · on this computer
llama3.1 8B · on this computer
Shield held 1 email
Risk 100 / 100 · 4 reasons
Risk 100 / 100 · 4 reasons
8:46
Sign-in code
hides itself, then deletes
hides itself, then deletes
The real app
Five screens. One calm inbox.
Lumen running on a Mac with a local model and a demo inbox. The mail is made up; everything else is the app as it is.
Today
Your morning in 60 seconds
The first open of the day starts with a short brief your AI writes from the facts in your mail: what needs you, what is due, and how Lumen sorted the rest.
→How Lumen sorted your night, by count
→Inbox forecast: need you, read later, handled
→Ask about your mail in plain words
Inbox
Catch me up on any thread
Open a thread and Lumen summarises it, pulls out the to-dos and offers the next step, like adding the new meeting time to your calendar.
→Priority and Others tabs, with labels
→One-tap replies in your own voice
→Every AI line says which model wrote it
Shield
Phishing held back, with reasons
Suspicious mail never reaches your inbox. Lumen says why in plain words, and every check runs on your computer, without AI and offline.
→Links whose text lies about where they go
→Pressure tactics and raw IP addresses
→Delete and block, report, or release
Codes
Sign-in codes that clean up after themselves
One-time codes are pulled out of your mail and ready to copy, with a countdown to when they disappear.
→Masked until you reveal or copy
→Hidden after 10 minutes, deleted after 24 hours
→Never in search or lock-screen alerts
Your AI
Pick the AI for each job
Every feature shows where your email text goes. Run everything on Ollama or LM Studio, or send one feature to your own cloud key.
→Labels, spam, phishing and codes need no AI
→Private numbers masked before any cloud call
→Every request listed in the network log
Features
AI in every part of the inbox, never hidden.
A composer that drafts
Pick what you want to say and the tone; the draft rewrites live. Before you send, it catches a missing attachment or a promised time.
Search that answers
Gmail-style filters, or ask in plain words: "How much has Marco invoiced me this year?" gets a total, a chart and the emails behind it.
Translate in place
An email in another language gets a Translate button that swaps the words and keeps the email's layout. See original swaps it back.
Rules in plain words
"Never send emails from my lawyer to a cloud AI." Teach Lumen in a sentence, and it suggests rules from what you already do.
Sensitive info lock
Emails with ID, card or bank numbers can sit behind your system password or fingerprint.
How it works
Everything happens inside the green line.
Lumen talks to your email providers directly and keeps what it downloads on your computer. Only the arrows that cross the line carry anything out, and each says what.
Your mail providers
Gmail · Outlook
iCloud · Yahoo
any IMAP host
Gmail · Outlook
iCloud · Yahoo
any IMAP host
System keychain
passwords and keys
passwords and keys
App window
inbox, brief, Shield
inbox, brief, Shield
Local model
Ollama, LM Studio
Ollama, LM Studio
Sync engine
IDLE, offline outbox
IDLE, offline outbox
Local store
mail, search, AI output
mail, search, AI output
AI router
per feature
per feature
Built-in checks
no AI, work offline
no AI, work offline
Masking
hides card, ID nos.
hides card, ID nos.
Updates and profile
no mail content
no mail content
Your cloud AI
your own key
your own key
Lumen's server
no mail, no passwords
no mail, no passwords
Google Analytics
usage counts
usage counts
YOUR COMPUTER
Mail, AI output and passwords stay here
your mail
IMAP / SMTP
signs in
saves
shows
every new email
asks
on this computer
with your key
masked
name, email, country, OS
signed updates, notices
anonymous counts, if on
AI on this computer: the router sends the text a feature needs to Ollama or LM Studio. Nothing about your mail crosses the line.
Every connection Lumen makes
| Where | What goes | When |
|---|---|---|
| Your mail providers | Your own mail, fetched and sent over IMAP and SMTP | Always, directly; new mail arrives over IMAP IDLE |
| Your cloud AI | Only the email text a feature needs, private numbers masked | Only for features you route to your own key; never for accounts marked local only |
| Lumen's server | Name, email, country, OS, app version, notification choices, a device ID | At sign-up and when checking for updates |
| Google Analytics | Anonymous counts of which features are used | If usage stats are on; off by default in the EU and UK |
| Senders' servers | Image and unsubscribe requests, brand logos | When you click Show images or Unsubscribe; logos once per domain, can be turned off |
Each connection is listed in the app's network activity log.
Privacy
No mail on our servers. Ever.
Stays on your computer
Emails and attachmentsstored on disk
Search indexbuilt locally
AI summaries and draftssaved next to your mail
Rules and writing stylelearned on this computer
Passwords and API keysin the system keychain
Sign-in codesdeleted after 24 hours
What Lumen's server gets
Name
Email
Country
OS and app version
Notification choices
A device ID
No password, no email content, no AI prompts. It is used for signed updates, security patches and notices. Anonymous usage counts can be turned off any time, and start off in the EU and UK.
Bring your own AI
Ollama local
LM Studio local
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