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SEAL

Sends encrypted files and folders through self-destructing links with expiry, passwords, download limits, audit logs, and agent support.

SEAL is a browser-based file transfer service for people and AI workflows that need a link, not another shared drive or recipient account. Open seal.net, choose a file or folder, and create a temporary delivery link. The browser encrypts the contents before upload, and the recipient opens the link in a browser without registering.

The free tier supports a seal of up to 1 GB for up to seven days. Senders can add a password, make access single-use, limit the number of openings, set expiry, add an encrypted message, and revoke future access from the management link. Larger transfers use one-time paid tiers rather than a recurring subscription.

For agent workflows, SEAL also provides SDK, CLI and MCP access so an agent can arrange file delivery without pasting the file contents into a model conversation. Revoking a seal stops future access; it cannot remove copies that a recipient has already downloaded.

Features

  • Browser encryption before upload
  • Password, single-use, opening limits, expiry and revocation
  • SDK, CLI and MCP access for agent workflows
  • Access rules include password, single-use, download caps, geo rules, NDA gates, and revocation
  • Signed access logs record opens and downloads with time and country

Use cases

  • Send a file or folder without requiring either side to register
  • Deliver files from AI workflows without placing file contents in chat
  • Share time-limited files with controlled future access
  • Export signed access logs as JSONL for delivery evidence
  • Share a folder through a self-destructing link with expiry and access rules

Screenshots

SEAL screenshot

Frequently asked questions

Do I need an account to send or receive a file?

No. A sender can create a seal in the browser, and the recipient can open the delivery link without registering.

What access controls are available?

You can use a password, single-use access, opening limits, expiry and revocation of future access.

How much can I send for free?

The free tier supports a seal of up to 1 GB for up to seven days. Larger transfers use one-time paid tiers.

Can a seal be revoked?

Yes. The homepage says users can revoke at any moment, deleting the ciphertext

What we verified

Public API?
Yes, documentation covers the HTTP API, public send endpoints, OpenAPI JSON, SDK, CLI, and MCP
Self-hostable?
Not stated
Free tier without a credit card?
Free tier stated; homepage says no sign-up and no account, but credit card wording is not stated
Pricing model?
Free seals plus one-time paid upgrades per seal for more storage and longer expiry
Price?
Free seal includes 1 GB and up to 7 days; 5 GB costs $9 once for 3 months; 50 GB costs $29 once for 6 months; 500 GB costs $99 once for 12 months
Data region / hosting location?
Not stated
Named integrations?
CLI, MCP, SDK, Telegram, Slack, browser, HTTP API, Claude, Cursor, Cline

Could not be verified

The site does not state self-hosting, exact hosting region, long-term free-tier rate limits, enterprise pricing, SOC 2 or ISO certification, paid bug bounty availability, or whether Slack support is fully live beyond the documentation status.

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