FileShot vs Signal: Dedicated Sharing vs Private Messaging

Quick Comparison

Feature	Signal	FileShot
Primary Function	Private messaging app with file sharing	Dedicated file sharing
Free Upload Limit	100 MB per file (default)	10 GB
Zero-Knowledge	No (message metadata minimal but server sees phone numbers)	Yes (full ZKE)
Encryption	Signal Protocol E2E for messages/files	AES-256-GCM client-side
Metadata	Minimal (sealed sender helps), phone numbers registered with Signal	Minimal (no phone number)
File Retention	Permanent until manually deleted	1 day to unlimited
Recipient Requirements	Requires Signal app + phone number	Browser-based (no account)

Two Different Tools

Signal is a nonprofit privacy-focused messaging app that uses the Signal Protocol for end-to-end encrypted messaging and calls. File sharing is a secondary feature within the messaging experience, with a 100 MB file size limit by default. Files sent via Signal are encrypted end-to-end and delivered as part of the message thread. Signal collects minimal metadata but requires phone number registration for both sender and recipient. Files are stored permanently on the recipient's device until manually deleted.

FileShot is a dedicated file sharing platform built for zero-knowledge encryption and free file uploads (10 GB per file). Files are encrypted with AES-256-GCM in the browser before upload, with the decryption key living only in the URL fragment. No phone number or account is required for either sender or recipient. Recipients access files via any browser by clicking the link. FileShot is purpose-built for file transfer, not messaging.

File Size Limits

Signal's default file size limit is 100 MB per file. This limit exists because Signal is designed for message-based communication, not large file delivery. If you're sending video files, design work, datasets, or large archives, Signal may not be an option.

FileShot has a 10 GB per-file limit on the free tier (expandable to 300 GB on Creator). Upload files of any size with zero-knowledge encryption. Paid tiers increase per-file size caps (100 GB for Pro, 300 GB for Creator) with unlimited total storage. If your use case is large file sharing, FileShot is built for that.

Zero-Knowledge vs. E2E Encryption

Signal uses the Signal Protocol for end-to-end encryption of messages and files. This means message content is encrypted between sender and recipient, and Signal's servers cannot read the content. However, Signal's servers do see phone numbers, contact discovery metadata, and message timestamps. Signal collects minimal metadata compared to most messaging apps, and features like "sealed sender" help obscure sender information, but Signal is not zero-knowledge in the technical sense.

FileShot uses zero-knowledge encryption. Files are encrypted client-side with AES-256-GCM before upload. The decryption key is generated in the browser and included only in the URL fragment, which is never sent to the server. FileShot's servers literally cannot decrypt your files, even if compelled by law. There are no phone numbers, no identity registration, and no metadata linking uploads to identities. This is zero-knowledge by design.

Phone Number Requirement

Signal requires both the sender and recipient to have Signal installed and a phone number registered with Signal. If your recipient doesn't use Signal, they must install the app and register before they can receive your file. This creates friction for one-off file transfers or sharing with non-technical users who don't want to install another app.

FileShot requires no app, no account, and no phone number. You upload a file, get a link, share the link. The recipient clicks the link, the decryption happens in their browser, they download the file. No signup, no install, no registration. This is the core design philosophy of FileShot: maximum accessibility with zero barriers.

File Retention

Signal stores files permanently on the recipient's device until they manually delete the message. There is no automatic expiry or retention control. If you send a sensitive file via Signal, you're trusting the recipient to delete it appropriately. Signal's server does not store the file long-term once delivered, but the file persists on the recipient's device indefinitely.

FileShot allows configurable file retention from 1 day to 90 days, with automatic deletion at the end of the retention period. Lite plan ($2/month) enables unlimited file retention if needed. This gives you explicit control over how long files remain accessible. For sensitive files, short retention periods reduce exposure risk.

Use Cases

Use Signal if you're already using Signal for private messaging with someone and want to send them a file under 100 MB as part of an ongoing conversation. Signal works well for sharing photos, documents, and small videos with contacts you communicate with regularly.

Use FileShot if you need to share large files over 100 MB, share with someone who doesn't use Signal, avoid requiring phone number registration, transfer files without installing a messaging app, or need dedicated file transfer functionality with zero-knowledge encryption. FileShot is for one-off file sharing, large file delivery, anonymous uploads, or browser-based convenience.

Who Should Choose FileShot?

If you need dedicated file sharing rather than messaging-with-files, FileShot is the better tool. If your files exceed 100 MB, FileShot eliminates the size constraint. If your recipient doesn't use Signal or you don't want to require app installation, FileShot works in any browser with zero setup. If you want true zero-knowledge encryption with no phone number linking, FileShot delivers that by design.

For dedicated file sharing with zero-knowledge encryption and free uploads, try FileShot free or explore our plans.