#01 Agent
Does the work
Real files, real commands, the web, and a browser beside the chat. It asks before anything that matters.
Intelligence in motion
An agent with its own cloud and wallet. It builds on your computer or in Letronna Cloud, hosts the result at a live link, pays for the APIs it needs, and is written in Rust: it starts in 8 ms.
Alpha · free with an account · macOS, Windows, Linux
See it work
Prompt in.
Live link out.
One run, start to finish: it fixes a bug, switches models mid-session, builds a marketplace in Letronna Cloud and hands back a live link, then does it again in the terminal.
Rust · CLI starts in 7.65 ms · 84% on Harness-Bench · Open source
Art: Gustave Doré, 1876, public domain, dithered by Letronna.
Capabilities
What it does
while you work.
#02 Memory
Written to disk
Plain text you can open, edit and delete. A file, not a black box.
#03 Auto mode
Asks less, safely
A judge on your own model decides what would otherwise ask; commands can run confined by the OS.
#04 Delegate
Splits the work
Helpers that work side by side and share a task list, and workflows that run many agents.
#05 Chat apps
Answers your phone
Telegram, Discord and Slack, with files and voice notes, even with no window open.
#06 Extend
Speaks your stack
MCP servers over HTTP and OAuth, plugins from git, skills, and Zed or JetBrains over ACP.
Letronna Cloud
Close the laptop.
It keeps working.
Tasks
Keeps going without you
Ask in the chat and the task runs on our servers in a container of its own. Close the app or the laptop; the answer waits for you.
Services
Stays online
Say keep it running and it stays up: a scheduler, a webhook, a watcher. Restarted if it stops, billed by the hour from your credit.
Apps
A link of its own
A web app gets its own address on letronna.si, wakes on the first visit and sleeps when nobody is looking.
YouWatch my shop's stock every hour and email me when anything runs low. Keep it running.
LetronnaBuilt and tested stock.js: it read your stock and sent a test email. It now keeps running in Letronna Cloud (256 MB). See what it prints, stop or restart it under Cloud.
stock-watch · online · about $1.50 a month
Comes with Pro. Compute is about $6 per GB a month from your credit, charged by the second.
Platforms
One build
per desk.
macOS
13+, Apple silicon
Download .dmgsign in
Windows
11, x64
Download .zipsign in
Linux
x64, glibc 2.31+
Download .tar.gzsign inOn your phone
Native apps are coming.
iOSApp StoreComing soonAndroidGoogle PlayComing soon
No. The app runs locally with your own model keys. An account is for hosted models, and for Letronna Cloud on Pro.
On your disk. Context and memory are plain-text files under ~/.letronna. Nothing leaves the machine unless you connect a hosted model.
Any OpenAI-compatible endpoint, Anthropic, local models through Ollama or llama.cpp, and the hosted pool on Pro.
Yes. Memory is written to disk as you work and loaded on the next launch. Edit or delete it like any other file.
Nothing runs on your machine while the app is closed, and scheduled runs wait for it. Tasks you sent to Letronna Cloud keep going, and anything you asked to keep running stays online.
The same agent on our servers. Ask in the chat to run a task there, keep a service running, or give a web app its own link. It comes with Pro and is paid from your credit.
Native iPhone and Android apps are coming.
The app and the agent are MIT-licensed. The hosted models and Letronna Cloud are the paid parts.
Pricing
Pay for the models,
not the seat.
Free
$0forever
Bring your own keys.
- Local agent, unlimited sessions
- Plain-text memory on disk
- Any model endpoint you own
- Community support
ProMost chosen
$20per month
Hosted models included.
- Everything in Free
- $20 of hosted credit a month, or $240 at once on yearly
- Lower prices on every hosted model
- Letronna Cloud: tasks, services and web apps
- Three times the requests a minute
- Cancel any time
Team
$18per seat, monthly, 2 to 5
One credit pool for the whole team.
- Everything in Free
- $18 of shared credit per seat, monthly
- Three times the requests a minute
- Per-member spending limits
- Audit log of every change
Prices in USD. Local use is free forever; you only pay for hosted models and Letronna Cloud, whose compute is about $6 per GB a month from credit.