TotalSig

TotalSig is a non-custodial multisignature wallet built on Multi-Party Computation (MPC) technology, designed to give individuals, businesses, and decentralized organizations shared control over digital assets without exposing complete private keys. Launched in December 2022 and available as a Google Chrome extension, TotalSig covers more than eleven blockchains under a single unified interface.

How It Works

Rather than using traditional on-chain multisig contracts, TotalSig implements MPC-based threshold signatures. In this model, private keys are never generated or stored as a whole in any single location. Instead, each co-signer holds a cryptographic key share, and the group collectively signs transactions through a distributed protocol—without any party ever reconstructing the full private key. This approach allows TotalSig to provide multisig-equivalent security on blockchains that do not natively support multisig scripting, while presenting a consistent experience across chains with fundamentally different underlying architectures.

The wallet supports up to 32 co-signers per wallet, with users configuring the signing threshold that suits their security model—for example, requiring 3 of 5 co-signers to approve a transaction before it is broadcast to the network.

Supported Blockchains and Assets

TotalSig covers more than 1,000 assets across the following networks:

• Bitcoin, Litecoin, Bitcoin Cash, Dogecoin
• Ethereum, Polygon, Arbitrum, Avalanche, Optimism
• BNB Smart Chain
• Tron
• Solana

For each chain, the wallet handles the native coin alongside major token standards: ERC-20 and ERC-721 on Ethereum and EVM-compatible chains, BEP-20 on BNB Chain, TRC-10 and TRC-20 on Tron, and SPL tokens on Solana. NFT storage and transfer are supported across compatible networks.

Solana Integration

On Solana, TotalSig supports SOL and the SPL token standard in full, including NFTs, making it suitable for organizations managing Solana treasury assets or DAOs requiring multi-party authorization for on-chain activity. Because TotalSig's MPC approach coordinates signatures off-chain rather than routing transactions through an on-chain multisig program, Solana transactions through TotalSig incur standard single-signature network fees. The project claims a cost of approximately $0.01 per transaction compared to $3.54 for smart-contract-based multisig alternatives. The wallet also includes an automatic fee calculator that adjusts transaction fees to account for real-time network conditions.

Key Features

Multiple wallets per account: A single TotalSig account can contain several distinct wallets, allowing organizations to segregate treasuries by team, purpose, or risk profile.

Web3 compatibility: The wallet integrates with DApps, DeFi protocols, DAOs, and smart contracts, enabling co-signed interactions beyond simple asset transfers.

On-chain privacy: MPC signatures appear on the public ledger as standard single-signature transactions, revealing no information about the number of co-signers or the threshold configured—a contrast to on-chain multisig programs where the signing structure is publicly visible.

Unified cross-chain interface: Despite the diverse transaction formats across supported chains, TotalSig presents a single interface for all networks, reducing operational overhead for teams managing multi-chain treasuries.

Security

TotalSig describes its codebase as fully audited and states that it uses 256-bit encryption throughout. The company reports having managed millions of dollars in assets without a security breach. However, TotalSig's public documentation does not name an auditing firm, link to a published audit report, or provide technical specifics about the cryptographic library underpinning its MPC implementation. Independent third-party confirmation of the audit claim was not available at time of writing.

The wallet is non-custodial: TotalSig does not hold user funds or key material. Users retain full self-custody, and the platform charges no additional fees beyond the native network transaction cost for each chain.

Platform and Availability

TotalSig is currently distributed as a Google Chrome extension, listed on the Chrome Web Store with a 4.9-out-of-5 average rating across user reviews. The project has indicated plans to release mobile applications for Android and iOS, though no release date has been published. A Telegram community is available at t.me/TotalSig, and the project maintains a blog covering multisig concepts, threshold signature cryptography, and Web3 security practices.

Ecosystem Fit

As a multi-chain MPC wallet, TotalSig occupies a specific niche in the Solana ecosystem: shared treasury management that avoids the overhead of deploying and maintaining an on-chain multisig program. Its cost advantage is most relevant for organizations executing frequent transactions where per-transaction fees accumulate across many signatures. The primary tradeoff is that MPC coordination occurs off-chain, meaning the co-signing process depends on TotalSig's infrastructure availability and implementation security rather than relying on fully on-chain execution and auditability as a native Solana multisig program would.