Quick Overview
Both tools solve the same core problem: sharing sensitive text (passwords, keys, credentials) through a link that works once and then self-destructs. Both are open source. But the implementation details differ significantly — especially around encryption and privacy.
The Big Difference: Where Encryption Happens
This is the most important distinction between the two tools and affects everything else about privacy and security.
With OneTimeSecret, the server receives your plaintext secret over HTTPS, then encrypts it server-side. This means the server operator can theoretically read your secret before encryption — or be compelled to by a court order, or have it exposed in a server breach.
With onetimelink.me, encryption happens in your browser using the Web Crypto API before anything leaves your device. The server only ever receives ciphertext that it cannot decrypt. This is true zero-knowledge architecture.
What does this mean practically? If someone compromised the onetimelink.me server, they would get encrypted data with no way to decrypt it. The encryption keys exist only in the URLs shared between sender and recipient, never on the server.
Feature-by-Feature Comparison
| Feature | onetimelink.me | OneTimeSecret |
|---|---|---|
| End-to-end encryption | ✓ Browser-side AES-GCM | ✗ Server-side encryption |
| Zero-knowledge | ✓ Server never sees plaintext | ✗ Server receives plaintext |
| Account required | ✓ No account needed | ~ Optional, adds features |
| Open source | ✓ | ✓ |
| Custom passphrase | ✓ | ✓ |
| Auto-expiry options | ✓ 5 min to 7 days | ✓ Up to 14 days (paid) |
| Password generator | ✓ Built-in | ✗ |
| Passphrase generator | ✓ Diceware | ✗ |
| Free tier | ✓ Fully free | ~ Limited (25 chars for anon) |
| API access | ✗ Not yet | ✓ With account |
| Self-hosting | ✓ | ✓ |
Where OneTimeSecret Has the Edge
Let us be fair about where OneTimeSecret offers something we do not (yet):
- API access. OneTimeSecret offers a REST API for programmatic secret sharing. Useful for integrating into CI/CD pipelines or internal tools. We plan to add this.
- Established reputation. OneTimeSecret has been around longer and has a larger user base. That matters for trust.
- Custom branding on paid plans. Enterprise users can white-label the interface.
Where onetimelink.me Has the Edge
- True end-to-end encryption. The biggest differentiator. Your secrets are encrypted in the browser, not on the server. The server is cryptographically unable to read your data.
- No account wall. Full functionality with no signup. OneTimeSecret limits anonymous users to 25 characters.
- Built-in password and passphrase generators. Generate strong credentials and share them in one step.
- Completely free. No paid tiers, no feature limits, no character restrictions.
- Modern, clean interface. Built with a focus on simplicity and speed.
The Bottom Line
If you need an API or enterprise features like custom branding, OneTimeSecret is a solid choice. But if your priority is maximum privacy and genuine zero-knowledge encryption, onetimelink.me has a fundamental architectural advantage: the server never sees your secrets, period.
Both tools are open source, so you do not have to take our word for it. Read the code, verify the encryption implementation, and decide for yourself.
Switching is easy. There is no account to migrate, no data to transfer. Just bookmark onetimelink.me and start using it for your next secret share.
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