01
Encrypted before relay
Content is encrypted by the Post client before it is sent to the relay service.
Utah Software presents
Post
Private transfer without giving the server your secrets.
Post is a command-line encrypted relay for sending messages and files between people and systems. It is designed around a zero-knowledge transfer model, a simple command-line interface (CLI), and simple annual plans.
Free plan available
1–30 day transfer lifetime
Windows & Linux
# create your Post name
$ post init alice
Post name created: alice
Default Post name: alice
# find a recipient
$ post find bob
Post name found
# send a file
$ post send bob -f report.zip
Transfer accepted.
No browser upload workflow. No shared folder to manage. Just Post.
Zero-knowledge
transfer model
Messages + files
one simple client
Command-line (CLI)
made for automation
Same protection
on every plan
Why Post
Secure transfer without turning file delivery into a project.
Post keeps the everyday workflow small while putting encryption, identity, transfer limits, and retention behind a consistent command-line experience.
02
Small messages or large files
Use the same transfer model for a short message, a document, or a large data file.
03
Built for scripts
A predictable command-line interface (CLI) makes Post useful at a terminal and inside repeatable automated workflows.
04
You choose the lifetime
Set a transfer lifetime from 1 to 30 days instead of leaving content available indefinitely.
How it works
A short path from sender to recipient.
Post keeps the relay in the middle without making the relay the owner of your plaintext content.
1
Prepare locally
The Post client prepares the message or file and encrypts the transfer before relay.
2
Relay securely
The Post service accepts and stores the encrypted transfer for the selected lifetime.
3
Retrieve with Post
The recipient uses Post to retrieve the waiting transfer and process it on their system.
Command-line (CLI) first
Useful in a shell. Natural in automation.
The common workflow stays readable: find someone, send something, list what is waiting, and retrieve it.
Read the 5-minute getting started guidepost find bob
post send bob -m "Hello"
post send bob -f report.zip
post list
post get <transfer-id>
Simple annual pricing
Start free. Add capacity when you need it.
Every plan uses the same Post encryption and zero-knowledge transfer model. Paid plans add larger file limits, more annual transfer, more Post names, and the paid network class.
Compare all plansFree10 MB max file · 1 GB/year
$0
Personal100 MB max file · 25 GB/year
$19/yr
Pro5 GB max file · 250 GB/year
$49/yr
Business500 GB max file · 5 TB/year
$150/yr
Ready to try Post?
Start with the Free plan.
Download the client, create a Post name, and send your first transfer.