Connecting Our Military Community


Build Your Military Journey


See why today's generation of military leaders are
using Sandboxx for secure & private unit communications

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Send letters on-the-go to basic training,
those deployed or any military address around the world

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The Digital Unit

The military journey starts at the recruiting station. Find every unit you have ever served with and stay connected.

Simplify your social unit comms in one place

"Check" posts to simplify unit notifications

Invite your Kin to let their camaraderie thrive

Staying connected has never been easier

Add your units - define your dates - rebuild your journey

Historic units built by "E-Tool"

Our friends and family are known as "Kin"

Camaraderie extends beyond the uniform

Kin is invite only. Ask your


Send Letters

Whether it's a simple "I love you", a memorable childhood milestone, or the pup missing his freedom fighter - snap a photo from your phone and write a message just as easily as a text.

In 4 Easy Steps

  • 1. Sign Up

    Create a Sandboxx account with just a few taps.


  • 2. Connect

    If your loved one has already created an account, connect with them in the app. Not connected? You can still send them letters as long as you know their address.

  • 3. Send

    We automatically and privately covert each letter into physical mail. Mail call has never been so frictionless.

  • 4. Receive

    The best thing about Sandboxx letters - we include a pre-stamped and addressed envelope with each parcel for swift return to you. We even include paper to write on.


Letters Are Fast

Send your letter before 6pm EST (M-F) and, your letter will be created that night so it's on the way

First One Is Free

Buy one for $3 or buy a bundle to save. We offer three different packages to choose from

Make A Difference

A percentage of your letters will go to our partner non-profit organizations

Our Facts


Units Added By You


Letters Sent By You

Packed With Amazing Features

Secure - Private - Simple


A feed where you can share photos and messages with your connections


Keep your profile information updated to receive content relevant to your journey


Send photos and messages to your connections when they are off-the-grid (training or deployed)

Units/Kin Units

Connect with your current unit and past units you served with during your military career


We will keep you posted when someone requests to connect with you, likes or comments on your posts


Find other users to connect with. You can find a list of all your connections and suggestions