Electrum
Lightweight Bitcoin SPV wallet — hardware-wallet support, multisig, Lightning; the desktop standard since 2011.
| Type | Desktop wallet |
|---|---|
| Custody | Self-custody — the user holds the keys |
| Platforms | Windows, macOS, Linux, Android |
| Open source | Yes — source code |
| Multisig | Yes |
| Account / KYC | No identity verification |
| Official site | electrum.org |
Cryptocurrencies it holds
Features
Security record
User funds lost through the maker's fault
- 2018 — From December 2018 to 2020, rogue servers used Electrum's formatted messages to prompt a fake update that stole funds. ~2,200 BTC, ~$25M at 2020 prices · None (borderline: the attack ran through infrastructure the maker did not fully control) source
No customer-data leak on record as of 13 October 2026.
Only the maker's own failures count; phishing and lab attacks that need the stolen device do not. Every wallet compared: Crypto wallet hacks, and the wallets that were never hacked.
Questions
Has Electrum been hacked?
Yes. In 2018: From December 2018 to 2020, rogue servers used Electrum's formatted messages to prompt a fake update that stole funds. Losses: ~2,200 BTC, ~$25M at 2020 prices; None.
Which coins does Electrum support?
Bitcoin.
Is Electrum open source?
Yes. Its source code is public at https://github.com/spesmilo/electrum.
Does Electrum support multisig?
Yes. Electrum can hold one key of a multi-signature wallet, where several keys on separate devices are needed to move funds — the setup that survives any single wallet failing.
Is Electrum custodial?
No. Electrum is self-custody: the user holds the keys, and nobody else can move the funds.
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The wallets directory compares every wallet by type, custody and the coins it holds. A wallet's place there is not for sale.