CRM here, projects there, reports in a third place, invoices in a fourth. The integration you do by hand every week has a price.
Ask an agency operator to list their software and you usually get something like: a CRM, a project manager, a task board, a shared calendar, a reporting tool, a spreadsheet of keywords, an invoicing app, a file drive, a chat tool, and a folder of client passwords nobody wants to talk about.
Each tool is individually fine. The cost is in the seams.
Every handoff between tools is manual context transfer: copy the client's name into the project tool, re-type the campaign result into the report, re-attach the file into the invoice email, re-explain the context in chat. Minutes each time, dozens of times a day, across every person on the team. It compounds into the most expensive line item you never see on a P&L.
Worse than the wasted minutes is the analysis that never happens. When campaign data lives in one silo, operations in another and money in a third, questions like "which client is actually profitable?" or "did that campaign change produce collected revenue?" require a research project. So they don't get asked — and decisions get made on feel.
A useful way to evaluate any agency stack: can it help you win the next client (evidence, proposals), run the house (people, projects, money), and grow every existing client (measured outcomes) — without leaving the system? If a tool only does one of the three, the seams between it and the rest are where your margin quietly leaks.