Is Handshake free to use?

Hello there, I'm curious about Handshake and its accessibility. Could you please clarify, is Handshake free to use? I understand it's a decentralized naming system, but I'm unsure if there are any fees or costs associated with utilizing it. Additionally, if there are any limitations or restrictions to its usage, I'd love to hear about those as well. Thank you for your time and assistance in clarifying this matter.