uthrynTrust shouldn't cost you
$1,200 and a lesson.
Authryn exists for everyone who's ever sold something to a stranger and worried about what happens after the handshake.
We were tired of “he said, she said.”
Every day, millions of people sell phones on Marketplace, hand over deposits to freelancers, sublease apartments to strangers, or buy used cars with cash. And every day, a percentage of those deals go sideways — not always because anyone is a criminal, but because there's no neutral record of what actually happened.
A text message can be deleted. A screenshot can be edited. A handshake can be denied. And when it comes down to one person's word against another's, the honest one usually loses — because they assumed the other person was honest too.
We didn't want to build a payment processor, a blockchain, or a legal contract platform. Those exist already and they're overkill for a $200 phone sale. We just wanted the simplest possible proof that two real people, with two real phones, agreed to the same deal at the same time.
That's Authryn. 50 cents. 60 seconds. Forever.
Authenticated Transaction Receipts
When you sell something to someone, you both need proof that the transaction happened. Authryn creates that proof.
Both the seller and buyer digitally sign the receipt. Each signature is verified via SMS. The result is a tamper-proof record that neither party can deny.
How we choose to operate
We sell trust. So our incentives have to be clean.
Pay only when you use it
No subscriptions. No tiers. No locked features. One product, one price, one promise.
Your data isn't a product
We don't sell, share, or advertise to your data. Phone numbers are for verification only — never for marketing.
If it fails, you don't pay
If a receipt doesn't complete (other party doesn't verify, SMS fails, etc.) we refund it automatically. No tickets, no waiting.
Honest tech, not buzzwords
SHA-256 hashing. SMS OTP. That's it. No blockchain, no tokens, no “web3”. The boring stack actually works.
Both sides, always
A receipt only exists if both parties verify and sign. We'd rather no receipt than a one-sided one.
Built to be boring
Trust products shouldn't be flashy. We focus on reliability, clarity, and getting out of your way.
We take security seriously,
because you have to.
Here's exactly what we do to protect you and your transactions.
SHA-256 Cryptographic Hashing
Every receipt is hashed using the same algorithm trusted by banks and governments. Any change — even one character — invalidates the hash.
Phone Verification on Both Sides
Real mobile numbers required. VoIP, virtual numbers, and SMS spoofing services are detected and blocked.
Encrypted In Transit & At Rest
TLS 1.3 between your device and our servers. Database encryption protects stored records.
No Selling, No Sharing
Your phone number, email, and receipt data are never sold, shared with advertisers, or used to profile you.
Masked Public Receipts
When a receipt is verified publicly, phone numbers are masked (•••-•••-1234) and descriptions stay private.
Immutable Audit Trail
Every action — creation, verification, signature — is timestamped and stored permanently. Nothing can be edited after the fact.
What Authryn Is Not
We'd rather be honest about what we don't do than oversell what we do.
Not a Legal Contract
Our receipts are records of agreement between two parties. They are not legally binding contracts. If you need legal protection, consult a lawyer.
Not a Payment Processor
We don't handle money. We don't process payments, hold funds, or act as escrow. We only create receipts after you've handled payment yourselves.
Not a Bank or Financial Institution
We are not regulated as a financial institution. We don't store financial data, process transactions, or provide financial services.
Not a Dispute Resolution Service
While our receipts can help prove what was agreed, we don't mediate disputes. The receipt is evidence — what you do with it is up to you.
Not Blockchain or Cryptocurrency
We use standard cryptographic hashing (SHA-256) to ensure integrity. No blockchain, no tokens, no unnecessary complexity.
Not an Identity Verifier
We verify phone ownership, not legal identity. We confirm someone has access to that number — not that they are who they say they are.
What Authryn Is
Verification Layer
We verify that both parties are real people with real phone numbers, and that both agreed to the transaction details.
Record Keeper
We create and store authenticated records of transactions. Each receipt has a unique ID and cryptographic hash for verification.
Trust Infrastructure
We provide the foundation for strangers to transact with confidence. Not through promises, but through verifiable proof.
One price. One product. No tricks.
Your first receipt is free. After that, $0.50 each. Buy upfront, no expiry. Failed receipts auto-refunded. No subscriptions, ever.
View PricingReady to lock in your next deal?
Create your first authenticated receipt in under a minute. On us.
Get My Free ReceiptTakes 60 seconds. No credit card. No commitment.