AI that proves it did not keep your conversation.
Every AI company promises it will not keep your data. Epheia gives you a receipt that proves it, for every session. Anyone can check that receipt in about a second, free, with no account.
Proof you can keep.
YOU DON'T HAVE TO TRUST THIS APP · EPR-1.4
Proof you can keep.
YOU DON'T HAVE TO TRUST THIS APP · EPR-1.4
What actually happens
Before you type, while you chat, and after you leave.
Checked before you type
Your browser inspects the server's hardware before your first message leaves your device. If the check fails, nothing is sent.
Sealed while you chat
Your conversation runs inside a locked compartment in the processor. Neither the cloud provider nor Epheia can read into it.
Erased, with evidence
When the session ends, the key protecting your data is destroyed, and proof of that erasure goes into your receipt.
A shredding company does not just promise to destroy your old files, it hands you a certificate afterward. Your receipt is that certificate, for your conversation, and anyone can check it.
See how checking works
No account, no download, and nothing leaves your browser.
How verification works
Check it, then try to break it
Every Epheia session ends with a receipt like this one. Open the free verifier to check one against the full protocol, with no account.
Everything above is generated in your browser to show how checking works. It is not a receipt from Epheia's enclave, it is not the EPR-1.4 format, and these are core cryptographic checks rather than the full 27-step protocol. Real receipts are graded by the open verifier.
Grade a real receipt from a live session against all 27 steps →What nobody else gives you
Others can prove your data stayed private while it was being used. Epheia also proves what happened to it afterward.
| Tinfoil | RedPill (Phala) | Apple PCC | Epheia | |
|---|---|---|---|---|
| What you hold after the session ends | Nothing | A per-response signature | Nothing | A full-session receipt |
| Evidence your data was erased | No | No | No | Yes: attested crypto-erasure with a read-back self-test |
| How an outsider checks it later | Live checking, not post-hoc | Verify the response signature | Not user-retrievable | Free public verifier, CLI or in-browser: 27 graded steps |
Assessments as of July 2026, from each vendor's public documentation. The comparison is about the artifact the user is left holding, not the quality of anyone's enclaves. See all six rows, and what each one does not claim →
Who it is for
From an anonymous first message to a hospital deployment, the proof is the same.
Anonymous and free tiers ask for nothing, not even an email, and issue the same receipts as every paid plan. Nobody can buy stronger privacy, and cost is never the barrier.
Lawyers, financial advisors and independent clinicians who must answer to auditors can adopt AI with the compliance record built in, session by session, on demand.
Larger organizations can run the Epheia Appliance inside their own cloud account and issue the same receipts, verifiable by the same free public tools.
Nothing here asks for your trust.
Open the verifier, load a real receipt from a live session, and grade it yourself against all 27 steps. Free, no account, and no need to believe a word on this page.
Checking a receipt is free for everyone, forever. Paid tiers buy capacity and convenience, never stronger privacy.
Epheia is in private beta. Sessions run by appointment, because the GPUs are brought up per session rather than left running.