Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Add contract terms and file links to the tracker for review.
Your team gets a linked tracker row and a contract summary to check when someone shares a readable contract file in chat.
Send approved contracts for signature and file signed copies with proof.
Your client gets the signature request, and your team finds the signed agreement with its audit page in the final folder.