A WeTransfer alternative with end-to-end encryption
WeTransfer is great for sending big files fast — but it can read them. SealFile encrypts your files in the browser with zero-knowledge encryption, so no one but your recipient ever can.
Why look for a WeTransfer alternative?
WeTransfer is convenient, but it's not built for privacy. Your files are encrypted in transit and at rest, yet WeTransfer keeps the encryption keys. That means the service — and anyone with access to it — can technically open your files. For invoices, contracts, IDs, or anything sensitive, that's a meaningful gap.
SealFile takes a different approach. Every file is encrypted in your browser before it's uploaded, using AES-256-GCM. The decryption key lives in the link fragment (after the #), which your browser never sends to any server. We store only encrypted data we cannot read.
SealFile vs WeTransfer
| Feature | SealFile | WeTransfer |
|---|---|---|
| End-to-end (zero-knowledge) encryption | ||
| Files encrypted in your browser | ||
| Provider cannot read your files | ||
| Password protection (free tier) | ||
| One-time / download-limited links | ||
| Custom expiry control | Limited | |
| No account required | ||
| Open-source encryption client | ||
| Max file size (free) | 200 MB | 2 GB |
Comparison reflects each service's free tier. WeTransfer allows larger transfers; SealFile prioritizes zero-knowledge privacy.
What you get with SealFile
Zero-knowledge by default
AES-256-GCM encryption runs in your browser. We only ever store ciphertext we can't decrypt.
No tracking, no account
Share instantly without signing up. No email, no profile, no analytics following you around.
Free password protection
Lock any share behind a password derived with Argon2id — no paid tier required.
Auto-expiring shares
Set an expiry from 1 hour to 30 days, or a download limit. Then the encrypted data is gone.
Frequently asked questions
Is WeTransfer end-to-end encrypted?
No. WeTransfer encrypts files in transit (TLS) and at rest, but it holds the encryption keys — which means WeTransfer can technically access your file contents. SealFile uses zero-knowledge encryption: files are encrypted in your browser and the key never reaches our servers.
Is SealFile free like WeTransfer?
Yes. SealFile's free tier includes all three encryption modes, files up to 200 MB, and up to 5 files per share — no account required.
What's the largest file I can send?
SealFile supports files up to 200 MB each, with up to 5 files per share. WeTransfer's free tier allows larger transfers (up to 2 GB), but without end-to-end encryption. If privacy matters more than raw size, SealFile is the safer choice.
Can I password-protect a transfer?
Yes — password protection is free on SealFile and uses Argon2id key derivation. On WeTransfer, password protection is a paid feature.
WeTransfer and other product names referenced here are trademarks of their respective owners. SealFile is an independent product and is not affiliated with, endorsed by, or sponsored by WeTransfer. This comparison is based on publicly available information as of June 2026 and may change over time — for the most current details, please check WeTransfer's own website.
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