Bubble is privacy-preserving infrastructure: one SDK gives you confidential transactions on any chain, built to strengthen security and compliance, not sidestep them. Full EVM and Solidity compatibility.
Bubble is live on COTI, Ethereum, Polygon, Arbitrum, Base. Coming next: Optimism, BSC, Avalanche, XDC, Solana.
Measured end-to-end on Arbitrum over 15,000 confidential transfers (July 2026): 500 cTPS sustained, 750 cTPS peak, at $0.14 per million transfers.
Central banks, L1s and industry leaders build with Soda Labs.
Bubble hides the amounts, token types, sender and receiver, all at the same time. No other solution covers all four.
Learn moreAdd the Bubble SDK to your existing stack and flip privacy on for all transactions, or only the ones you choose.
Learn moreDeployed across Ethereum, Polygon, Arbitrum and more: one SDK covers your entire on-chain footprint.
Learn morePrivate execution for swaps, lending, liquidity management, and strategies without exposing positions or intent.
Learn morePrivate stablecoin transfers with selective disclosure and compliance.
Learn moreConfidential issuance, distribution, and management of tokenized assets.
Learn moreKeep positions, NAV and rebalancing private while retaining on-chain settlement.
Learn moreNon-custodial on-chain accounts with private balances and activity.
Learn moreEmbed Bubble as the confidentiality layer inside your own product.
Learn moreBubble is built on a garbled-circuit–based Multi-Party Computation (MPC) architecture. Arbitrary computation is performed directly on encrypted data. Sensitive data is split across independent nodes; no single node can access meaningful information, and even if a node is compromised, no data is leaked.
Data is never decrypted during computation; the only disclosure path is the on-chain access list (ACL), through which authorized entities can request scoped decryption.
The Soda Labs stack is independently audited by Hacken, protected by three granted US patents, and runs in production as the privacy layer of COTI mainnet with 125,000,000+ confidential transactions processed.
Powering COTI mainnet privacy: Soda's GC-MPC is the first to deliver a cryptographic on-chain privacy solution, operational on the COTI network since mainnet launch (March 2025), with 100% availability outside planned upgrades.
Proof the Soda stack performs in production, at mainnet scale, day after day.
Selected for the European Central Bank's Pioneer programme: Soda Labs presented a pilot for confidential transactions in the digital euro context.
A working pilot presented at the highest institutional level of European finance.
The neutral reference for the field: a map of the projects, an honest comparison of the technologies (FHE, MPC, ZK, TEE and Garbled Circuits), and plain-English education on why confidentiality matters for institutions.
Explore the Privacy HubFamiliar tooling, a clean SDK, and a working reference app. Flexibility through programmable privacy for smart contracts. No cryptography expertise required.
COTI
Ethereum
Polygon
Arbitrum
Optimism
Base
BSC
Avalanche
XDC
Solana
import "@sodalabs/bubble-core-contracts/MpcCore.sol";import "@openzeppelin/token/ERC20/IERC20.sol"; contract SimpleShield { IERC20 public underlying; mapping(address => gtUint256) private privateBalance; function shield(uint256 amount) external returns (bool) { require(underlying.transferFrom(msg.sender, address(this), amount), "transfer failed"); gtUint256 oldBal = privateBalance[msg.sender]; gtUint256 newBal = MpcCore.add(oldBal, MpcCore.setPublic256(amount)); privateBalance[msg.sender] = newBal; MpcCore.permitThis(newBal); MpcCore.permit(newBal, msg.sender); return true; }}Balances are stored as gtUint256, a ciphertext type. There is no plaintext on the chain to leak.