The verdict
Bottom line: this is a job choice, not a head-to-head. Google Workspace is the operational backbone , Gmail on your domain, Calendar, Drive, Docs and Meet, with admin controls, from 7 USD/user/mo. Coda is the build-your-own-tooling layer , tables, views, buttons, automations and Packs , with a genuine free tier and per-Doc-Maker billing that keeps a small team cheap.
If you can only run one and you don't yet have business email sorted, Google Workspace wins by necessity , you need somewhere to send mail from. If your email is handled and your pain is spreadsheets-turned-trackers sprawling out of control, Coda is the sharper tool. In practice, the strongest setup for a lean B2B team is Workspace as the foundation with Coda bolted on where internal tooling lives , and because Coda's editor seats are free, that addition often costs nothing.