Best for: High-value agent treasury; multisig governance; modular plugin architecture
Not ideal for: Single-key fast transactions; non-EVM chains; simple single-agent use
Key Signals
Key Management
Smart contract multisig
Chain Support
EVM (20+ networks)
Integration
SDK + API
Pricing
Free (open source)
Features
🏦
Multi-sig Smart Accounts (Highest TVL)
Safe secures more value onchain than any other smart account implementation — consistently over $100B TVL. The m-of-n multisig model means no single agent key compromise can drain the treasury; multiple owners must agree on high-value transactions.
🔌
Modular Plugin System
Safe's module architecture allows attaching arbitrary smart contract logic to an account — spending limits, time locks, session key modules, allowlists. Agents can be granted scoped module permissions without being added as full owners.
📜
ERC-4337 Compatible
Safe 1.4.1+ supports ERC-4337 account abstraction via the Safe4337Module, enabling gasless transactions via bundlers and paymasters while retaining the multisig security model — agents can submit UserOperations without holding ETH for gas.
🌐
20+ EVM Networks
Deployed on Ethereum, Base, Arbitrum, Optimism, Polygon, Avalanche, Gnosis Chain, BNB Chain, and 12+ additional EVM networks. The same contract address is deterministic across chains via CREATE2, simplifying multi-chain treasury management.
Ratings
Security
4.9/5
TVL & Trust
4.9/5
Modularity
4.7/5
Ease of Setup
3.4/5
Ratings based on Safe documentation, Protocol Kit reference, and public audits — not end-to-end production testing. Ease of setup reflects the complexity of multisig coordination and module configuration relative to single-key alternatives.
Integration
# Install Safe Protocol Kitnpm install @safe-global/protocol-kit @safe-global/api-kit
import Safe, { SafeFactory } from "@safe-global/protocol-kit";
// Deploy a new Safe for an agent team (2-of-3 multisig)
const safeFactory = await SafeFactory.init({ provider: RPC_URL, signer: DEPLOYER_KEY });
const safeAccountConfig = {
owners: [agentKey1, agentKey2, humanOverseerKey],
threshold: 2,
};
const safe = await safeFactory.deploySafe({ safeAccountConfig });
const safeAddress = await safe.getAddress();
console.log("Agent treasury:", safeAddress);
// Create and sign a transaction
const safeTransaction = await safe.createTransaction({
transactions: [{ to: recipientAddress, value: parseEther("1").toString(), data: "0x" }],
});
const signedTx = await safe.signTransaction(safeTransaction);
// Execute once threshold is met
const executeTxResponse = await safe.executeTransaction(signedTx);