The end-to-end encrypted file platform
Send anything.
Get paid. Sign.
Big files, private links, real payments and e-signatures, all encrypted on your device and readable only by the people you choose. From your browser, your Mac, or your AI agent.
Your files stay private.
Even from us.
Goes from you to them. We never keep a copy.
Locked on your device before it leaves.
Only your link can open it.
Spize for AI agents
Ask your AI.
It sends the file.
Connect Spize to the tools you already use. A single prompt creates a private, encrypted link with the same security as the app.
- Claude
- Cursor
- ChatGPT
- Codex
Frequently asked questions
What is Spize?
Spize is an end-to-end encrypted file platform for sending big files with a private link, getting paid for downloads, collecting files from anyone, and signing documents. It works from your browser, from the macOS app, or through your AI agent.
How do I send large files for free?
Drop a file on spize.io and you get a private link to share. The free plan covers up to 8 GB per transfer and 10 transfers a month. The person you send it to simply opens the link in their browser, without creating an account or installing anything.
How is Spize different from other file-transfer services?
Files are encrypted on your device before they upload, and the decryption key travels only inside the link, so it never reaches our servers. We store ciphertext we cannot read, which means your files stay private even from us.
Do recipients need a Spize account?
No. Recipients open the link in any browser and the file decrypts on their device, with nothing to install and no account to create.
Can I charge people to download my files?
Yes. Put a price on any share and buyers pay at a built-in checkout to unlock the download. Payouts go straight to your bank account; Spize handles the payment flow.
Can I sign documents with Spize?
Yes. Upload a PDF, place the signature fields, and send it out. Everyone signs in the browser on any device, and you get the sealed, finished copy back.
How does the AI agent integration work?
Connect Spize to Claude, ChatGPT, Cursor, or Codex over MCP (Model Context Protocol). Ask your assistant to send a file and it creates the same private, end-to-end encrypted link the app would.
How long do share links last?
Links last 3 days on the free plan, 7 days on Plus, and up to 30 days on Pro. You choose the expiry when you share, and you can pause or delete a share at any time from the dashboard.
One link. Your rules.
Charge for a download. Ask for a signature. Pick when it expires. The person on the other side just opens a link in their browser, without an account.