The trust layer for the agentic commerce era
AI shopping agents — ChatGPT, Claude, Gemini, Perplexity — are becoming the primary interface between buyers and stores. Vonch gives your store a verified, machine-readable reputation they can actually trust.
No spam. We'll reach out when we're ready to onboard your store.
This attestation is permanently recorded on-chain and can be verified by any party at any time.
Fake reviews don't survive agent scrutiny
When a human reads a star rating, they make a judgment call. When an AI agent evaluates a merchant, it queries for proof. Review platforms built for humans weren't built for this.
Unverifiable ratings
Any platform can inflate star counts. There is no cryptographic proof that a rating originated from a real transaction.
Anonymous reviews
Traditional reviews carry no on-chain identity. Agents cannot determine who left a review or whether the purchase actually happened.
Closed data silos
Trustpilot and Google Reviews expose no machine-queryable attestation API. Agents can't read or verify them reliably.
Reviews any agent can verify
Three steps from store setup to machine-readable, cryptographically verifiable reputation.
Connect your store
Install Vonch via our SDK, Shopify plugin, or REST API. Your domain is DNS-verified and anchored on-chain.
Customers leave verified reviews
Every review is tied to a confirmed order and cryptographically signed with the buyer's blockchain identity. No transaction, no review.
Agents verify in real time
Any AI agent can query Vonch, retrieve the EAS attestation, and confirm a review is authentic — no intermediary, no trust required.
Built for the agents your customers use
We can't control what agents recommend. We build the infrastructure that lets them trust you — verifiable, machine-readable, and open to any agent with API access.
Agent query example
On-chain attestations, not promises
Every Vonch review is signed using the Ethereum Attestation Service on Polygon. The record is permanent, publicly verifiable, and tamper-evident. No one — not even Vonch — can alter or delete a signed review without leaving cryptographic evidence.
- PermanentAttestations persist on-chain indefinitely, independent of Vonch.
- Vendor-neutralThe EAS schema is a public good — any party can verify records directly.
- PseudonymousBuyer identity is a wallet address. No personal data is stored on-chain.
This attestation is permanently recorded on-chain and can be verified by any party at any time.
Compliant where it matters
Review regulation is tightening globally. Vonch was designed from the ground up to satisfy the evidence requirements these laws demand.
EU Omnibus Directive (2022/2161)
Platforms must verify that reviews originate from confirmed purchasers and disclose how they do so.
Every Vonch review is cryptographically tied to an order record before attestation is created. The proof is public and machine-verifiable.
FTC Endorsement Guides
Fake or incentivised reviews without disclosure are prohibited. Platforms must not suppress negative reviews.
On-chain purchase verification makes it technically impossible to submit a review without a matching transaction. No review can be silently removed.
GDPR · Data Portability
Users have the right to access, export, and erase their personal data.
All review data is exportable via GraphQL API. On-chain attestations are pseudonymous and remain accessible independently of Vonch.
Your reputation belongs to you
On-chain attestations are permanent and vendor-neutral. Your review history exists on Polygon — Vonch is the interface, not the custodian. Every attestation your customers signed remains verifiable and portable, regardless of your relationship with Vonch.
Read the data portability manifestoGet early access
Vonch is in stealth. Join the early access list and we'll reach out when we're ready to onboard your store.