One payment solution. Limitless privacy.
Experience true financial freedom. Accept private payments, protect user privacy, and transact confidently with zero-knowledge proof technology on Solana.
Your key to private payments
When you use ShadowPay, your payment amounts are encrypted with ElGamal cryptography on the BN254 curve, and zero-knowledge proofs verify your transactions without revealing sensitive details.
This makes it impossible for anyone, including validators, block explorers, and even ShadowPay itself, to see how much you're paying or receiving. Only you and your intended recipient have access to transaction details.
Zero-Knowledge Proofs
Groth16 ZK-SNARKs
Encrypted Amounts
ElGamal on BN254
Instant Authorization
Sub-200ms verification
Private Transfers, Unbreakable Privacy
Military-grade cryptography meets Solana's speed. Choose your privacy level: break sender links or hide everything.
Cryptographic Primitives
Bulletproofs
Range proofs that validate amounts without revealing them
Pedersen Commitments
Cryptographic amount hiding with binding properties
NaCl Sealed Box
Amount encryption via libsodium
Curve25519-Dalek
Elliptic curve operations (Ristretto255 group)
Merlin Transcripts
Fiat-Shamir heuristic for non-interactive proofs
Solana Runtime
On-chain verification with zero trust
External Transfer
Standard Privacy Mode
Sender identity broken (unlinkable)
Amount visible on-chain
Recipient visible on-chain
Best for:
Sending to external wallets, exchanges, or non-ShadowPay users. Breaks sender linkability while keeping transactions auditable.
Internal Transfer
Maximum Privacy Mode
Sender identity broken (unlinkable)
Amount completely hidden
Recipient visible (ShadowPay user)
Best for:
Maximum privacy between ShadowPay users. Amount is cryptographically hidden on-chain, visible only to sender and recipient.
No registration required • Connect your Solana wallet
Accept payments from anyone, anywhere
With ShadowPay's x402 support, merchants across e-commerce, API monetization, content paywalls, and more can accept private payments from customers worldwide, without compromising on speed or transparency.
Why use ShadowPay?
Instant payment authorization
x402 Protocol is our signature payment standard that enables sub-200ms authorization through off-chain ZK verification and on-chain escrow settlement.
How ShadowPay worksComplete transaction privacy
ElGamal Encryption protects payment amounts on-chain using BN254 curve cryptography. Zero-knowledge proofs verify transactions without revealing any sensitive data.
Pay less, keep more
0.2% transaction fee is all you pay per transaction, plus minimal Solana network fees. Compare this to traditional processors like Stripe charging 2.9% + $0.30 per transaction.
Developer-first integration
NPM SDK makes integration effortless. Install our packages, add 3 lines of code, and start accepting private payments. Full TypeScript support and x402 compatibility included.
View SDK documentationMaking privacy payments the default
ShadowPay was built by developers who believe that financial privacy is a fundamental right. We've created the first production-ready private payment infrastructure on Solana.
We're open-source and community-driven. We don't answer to venture capital investors, advertisers, or data brokers, and we will never compromise on user privacy.
Accessible to all
We believe that everyone has the right to financial privacy, which is why we offer ShadowPay for free alongside our premium merchant features.
Open by design
All ShadowPay services are open source, so anyone can check our code, and we regularly commission independent audits to confirm the claims we make.
People over profits
RADR's primary mission is to advance financial privacy and freedom on Solana, ensuring that we always put users first.
More than just payments
Discover a suite of privacy-first DeFi protocols designed to help you take control of your financial freedom on Solana.
With ShadowPay live on mainnet, you'll gain access to private payments today. Soon, you'll be able to manage decentralized identities, send encrypted messages, and swap tokens privately, all powered by zero-knowledge cryptography.
Stay off the RADR.
Join the next generation of private payment infrastructure.