Muun Wallet Inc. develops open-source self-custodial wallet software for Bitcoin and Lightning, distributed through its Android and iOS apps. Its wallet supports sending and receiving on-chain and Lightning payments from a single balance, uses a 2-of-2 multisignature security model for outgoing transactions, and provides an Emergency Kit containing encrypted recovery information, private keys, and output descriptors for independent recovery. The product is intended for individuals who want to hold and use bitcoin while retaining control of their funds.