The Back-office platform for Humans and agents. Privacy preserving on-chain treasury & payroll
PolyPay is a privacy-preserving on-chain payroll & multisig platform powered by zero-knowledge proofs. It lets teams pay contributors and manage shared treasuries without exposing the signers behind every transaction — information that's fully public on a standard multisig, where anyone can map who approved what.
On a normal multisig, every approver's address is visible on-chain, leaking your org chart, who controls the treasury, and who signed each payment. PolyPay replaces that with ZK-backed approvals: members authenticate and approve with zero-knowledge proofs, and only a single relayer wallet ever touches the chain — so signer identities stay private while the multisig logic stays fully verifiable.
Four pillars:
- Private multisig — signer identities stay hidden; only a relayer wallet appears on-chain.
- ZK authentication — log in and approve via zero-knowledge proof; secrets never leave your device.
- Batch payroll — pay one contributor or an entire team in a single flow, individually or batched.
- Agentic-friendly — first-class support for both human and AI-agent signers, so autonomous agents can hold and move treasury under policy.
PolyPay is live in mainnet beta on Horizen and Base, and now runs on Arbitrum One via Stylus — our core multisig wallet ported to Rust/WASM and deployed on Arbitrum One. Building the multisig of the future for both human and agentic teams.
Roadmap: confidential payment amounts and recipients — full transaction privacy — is in active development.
<p>During the buildathon we brought PolyPay to Arbitrum via Stylus:</p><p>- <strong>Ported our core </strong><span style="color: oklch(0.623 0.214 259.815)"><strong><em>MetaMultiSigWallet</em></strong></span><strong> from Solidity to Arbitrum Stylus (Rust/WASM)</strong> — kept it byte-for-byte ABI-compatible with the original Solidity contract, so our frontend (viem) and backend relayer reuse the same ABI with zero changes.</p><p>- <strong>Ported the EIP-1167 factory to Rust/Stylus</strong> — <em>createWallet()</em> deploys a minimal-proxy account per user and initializes it in a single transaction (proxy-per-account, to avoid paying the Stylus activation fee on every new account).</p><p>- <strong>Squeezed the implementation under Arbitrum's 24 KiB code-size limit</strong> (31,202 → 24,295 bytes) by moving events off-chain and hand-rolling the PoseidonT3 / zkVerify STATICCALLs — so it deploys on Arbitrum One today, with no functional or ABI change.</p><p>-<strong> Deployed to both Arbitrum One (mainnet) and Arbitrum Sepolia.</strong></p><p>- ZK commitments stay consistent across chains by STATICCALL-ing the on-chain poseidon-solidity PoseidonT3 library (the same Poseidon hash our Noir circuit uses).<br>- Built an agentic USDC-deposit agent on Arbitrum One — a standalone autonomous agent that gaslessly funds a PolyPay multisig with USDC via our x402 flow (EIP-3009 TransferWithAuthorization, settled through the Coinbase CDP facilitator). The signing key stays out of the agent process via OWS (Open Wallet Standard) + a policy engine that scopes the key to USDC-only, Arbitrum-One-only, to-your-multisig-only, under a spend cap and expiry.</p><p><br>Some Verifiable work (public repo, all merged during the buildathon):</p><p>- Arbitrum Sepolia + initial Stylus port + Rust factory — <a href="https://github.com/Poly-pay/polypay_app/pull/282">https://github.com/Poly-pay/polypay_app/pull/282</a></p><p>- Arbitrum One mainnet wiring + 24KB slim + dispatch tests — <a href="https://github.com/Poly-pay/polypay_app/pull/289">https://github.com/Poly-pay/polypay_app/pull/289</a></p><p>- Agentic payments on Arbitrum — <a href="https://github.com/Poly-pay/polypay_app/pull/292">https://github.com/Poly-pay/polypay_app/pull/292</a></p><p>- OWS-secured x402 USDC deposit agent — <a href="https://github.com/Poly-pay/polypay_app/pull/296">https://github.com/Poly-pay/polypay_app/pull/296</a></p><p></p>
<p>Currently raising a <strong>pre-seed</strong> round. To date we've secured a <strong>$60K grant from Horizen Foundation</strong>, which funded our live mainnet beta and pilot program.<br>To sharpen our business model, PMF, and GTM strategy, we joined a <a rel="noopener noreferrer nofollow" target="_blank" href="https://x.com/poly_pay/status/2061394336798155106"><strong>Founder Residency</strong></a><strong> program in Vietnam</strong>: <br>Latest <a href=" https://www.figma.com/deck/VxivjVdjld6HaEmIZMBvXI/PolyPay-Pitchdeck-ver-1.3?node-id=22-2543&t=I3WPfNjNTXJZI1iu-1">pitch deck</a></p>
