A multisig wallet is a wallet that needs more than one approval to move funds, for example two out of three devices or people. No single key, device or person can spend alone, so one loss or one theft does not empty the wallet.
How m-of-n works
Multisig setups are described as m-of-n. The n is the total number of signers. The m is how many of them must approve a transaction.
- 2-of-3: three signers, any two approve. One can be lost or stolen without losing the funds.
- 3-of-5: five signers, any three approve. Common for teams and treasuries.
- 2-of-2: both must approve. Strong against theft, but losing either one locks the funds.
The gap between m and n is your safety margin. A higher m makes theft harder. A larger gap makes loss easier to survive. You cannot maximize both, so the choice depends on which risk worries you more.
Two ways to build it
The word multisig is used for two different techniques.
On-chain multisig
The blockchain itself enforces the rule. Each signer has a full private key, and the network checks that enough signatures are present. Bitcoin supports this directly, and on smart contract chains a contract holds the funds and counts the approvals. It is transparent and well understood. But it works differently on every chain, and some chains do not support it at all.
Threshold signatures
Here the signers do not hold separate keys. Each holds a share, and the signers run a joint computation that produces one normal signature. The blockchain sees an ordinary transaction, so the same setup can work across many chains. The trade-off is that security rests on the wallet software's cryptography and not on a rule the chain enforces.
Multisig vs seed phrase wallet vs hardware wallet
| Aspect | Seed phrase wallet | Hardware wallet | Multisig wallet |
|---|---|---|---|
| Secrets to protect | One recovery phrase | One recovery phrase and a dedicated device | Several keys or shares, each on its own device |
| Single point of failure | Yes, the phrase | Yes, the phrase | No, as long as you stay within the threshold |
| Signing a transaction | One device | One device plus the hardware | Several devices together |
| Setup effort | Low | Medium | Higher |
A hardware wallet answers a different question from multisig. It protects one key from malware by keeping it on an offline device. The recovery phrase behind it is still a single secret. Whoever finds it controls the funds, and if you lose it together with the device, the funds are gone. Multisig removes the single secret itself. What is a self-custody wallet covers recovery phrases in more depth.
Who needs it, and the downsides
Multisig makes sense when one mistake would hurt: long-term savings, a family holding, a company treasury, or funds that several people manage and nobody should move alone. For small everyday amounts, a well backed up seed wallet is often enough.
The downsides are real.
- Setup takes longer. You need several devices and a backup for each one.
- Every transaction needs enough devices to be available, which is slower than one tap.
- There is more to keep track of. Lose more signers than your margin allows and nobody can recover the funds.
- With on-chain multisig, fees can be higher and support varies by chain.
Nobody can reset a multisig wallet. If you lose more devices and backups than the threshold allows, the funds are gone for good.
How multi-device vaults work
A multi-device vault applies the share-based approach to your own devices. In THORWallet, a multi-device vault works like this:
- Several of your own devices must sign together, for example 2-of-3 or 3-of-4. The threshold is at least two thirds of the devices.
- Each device holds its own share and its own backup file. There is no seed phrase for a vault.
- THORWallet holds no share.
- Vaults work for any chain and token the app supports, except Monero and NEAR, which are available in seed wallets only.
Keep the backup files in separate places. If every backup sits in the same location, whoever gets into that location has every share, and the vault protects you no better than a single phrase would.
THORWallet has one other wallet type: a seed wallet with a recovery phrase.
Setting up any multisig sensibly
- Choose the threshold. 2-of-3 is the usual starting point for one person.
- Use devices you control, and keep them in different places where that is practical.
- Create the backup for every device and store each one separately.
- Send a small amount first and sign a test transaction.
- Practice recovery before you move larger funds, so you know a backup works.
- Leave instructions for the people who should find the funds one day, without putting every backup in one place.
THORWallet is available on the download page. Whatever wallet you use, start with a small amount.
How to do it in THORWallet
Step-by-step articles from the help center, checked against the current app.
- Multi-device vaultsWhat a multi-device vault is, how many devices must sign, what works with a vault and how it differs from a seed wallet.
- How to create a vaultStep-by-step: create a multi-device vault in THORWallet, pair your devices with a QR code and save a backup on each one.
- How to sign with a vaultHow to approve a send or swap from a multi-device vault: start on one device, scan the QR code with another and join the signing.
- How to back up and restore a vaultHow to save a password-protected backup file on each vault device, and how to import it again after you lose or replace a device.
Sources
- BIP-11: M-of-N standard transactions
- Bitcoin developer guide: multisig transactions
- ethereum.org developer docs: smart contracts and multisig
- Safe docs: owners and threshold
- IRTF RFC 9591: threshold signatures (FROST)
- NIST IR 8214: threshold schemes for cryptographic primitives
Reviewed on 12 Nov 2026. Statements about THORWallet were checked against the help center, and the sources above were opened on that day. This guide explains how things work. It is not financial advice.