walletd is the flagship Sia wallet, suitable for miners, exchanges, and
everyday hodlers. Its client-server architecture gives you the flexibility
to access your funds from anywhere, on any device, without compromising the
security of your private keys. The server is agnostic, so you can derive
those keys from a 12-word seed phrase, a legacy (siad) 28-word phrase, a
Ledger hardware wallet, or another preferred method. Like other Foundation
node software, walletd ships with a slick embedded UI, but developers can
easily build headless integrations leveraging its powerful JSON API. Whether
you're using a single address or millions, walletd scales to your needs.