Your mail lives on your disk
Messages are downloaded to a SQLite database on your computer and stay there, alongside your own provider.
What it does
Search works offline
A local Bleve full-text index, so results come back instantly with no connection.
Keep what you need
Hold the last weeks or months, and pin single messages to keep forever.
PGP and S/MIME
Sign, encrypt, decrypt and verify. Keys never leave the machine. Off until you turn it on.
Mail has to prove who sent it
SPF, DKIM and DMARC results, with checks for spoofed names, off-domain Reply-To and lookalike domains.
Eight flag colors
Local by default, or synced as IMAP keywords.
Everything on Cmd+K
Folders, views, messages, settings and every menu action from one field.
Snooze and send later
Send a message away and have it return unread, or schedule one to leave at a set time.
Themes and density
Light, dark or one you write. Three densities, three corner styles, custom accent.
Mac, Windows and Linux
Go and Wails rather than a bundled browser, so it starts fast and stays light on memory.
Everything on Cmd+K.
One field over folders, views, messages, settings and every menu action.
Type a command, or / to search mail ⌘K
Illustrative. Results shown are a demonstration and do not run against a live inbox.
And the rest
Vim mode
Modal editing in the compose window.
Custom shortcuts
Rebind any key.
Swipe gestures
Trackpad swipes on messages.
Autocomplete
Learned from mail you send and receive.
Saved views
A search that opens like a folder, with a live count.
Reading tabs
Park a message without losing your place.
Portable config
Accounts, preferences and layout in one file.
Native notifications
All new mail, or only senders you mark.
Themes
Some of these are community themes, not all included with Pelton. More at themes.pelton.app.
Pelton can talk to an agent you run
It ships off, binds to your own machine, and starts read-only. Pelton itself contains no model and calls no AI service.
Off by default
Nothing listens until you turn it on in Settings.
Your machine only
Bound to 127.0.0.1. Binding to a routable address is blocked.
Read-only to start
Seven write actions, each granted separately, all starting off.
Sending ends with you
An agent can queue a draft. Only you can send it.
No attachment contents
Names, types and sizes. The files stay on your disk.
No AI service
No model, no API key, no cloud. Your agent runs where you already run it.
FAQ
Which email providers work with Pelton?
Most of them. Pelton speaks IMAP and SMTP, which is what nearly every provider offers. For Gmail, an app password is the simplest route. OAuth2 also works, but Pelton ships no client id of its own, so it needs Google Cloud credentials you create.
Does it work without a connection?
Yes. Mail is downloaded to your computer. You choose how far back to keep, and you can pin individual messages to keep permanently. Search runs against that copy.
Where is my mail stored?
In a SQLite database file on your machine, and on your own email provider. Nothing is routed through a server we run.
Is there any telemetry?
No. Nothing is counted or uploaded, and there are no automated crash reports. Bugs reach us only when someone writes an issue.
Does Pelton support PGP and S/MIME?
Both, since 2026.4. Import keys with passphrase handling, sign and encrypt what you send, and decrypt and verify what arrives, with the signature status shown on the message. Both are off until you enable them, and key handling stays local.
Does the MCP server send my mail to an AI company?
No. Pelton contains no model, no API key and no call to any AI provider. The MCP server is a local endpoint an agent you run connects to, and it is off until you enable it. What that agent does with what it reads is between you and whoever makes it.
Can an agent send or delete mail?
Only if you grant it. A freshly enabled server is read-only. The seven write actions are switched on one at a time and all start off. Even with sending granted, send_message queues a draft for you to approve, and delete_message moves a message to the trash.
Why is the first launch blocked?
The builds are not code-signed. On macOS, right-click the app and choose Open, then confirm. On Windows, choose More info, then Run anyway. After that it opens normally.
What is it built with?
Go and Wails, with a Svelte interface in the system webview. No bundled browser, so it starts quickly and uses less memory than an Electron app.