The honest answer is that most companies should buy. Off-the-shelf CRMs are mature, cheap to start with, and someone else maintains them. Building is the right call in a narrower set of cases than vendors, or agencies, usually admit.
Buy when your process is standard
If your pipeline looks like most pipelines, a configured product will fit. You will spend days, not months, and the ongoing cost is predictable.
Build when the process is the advantage
The case for building is not usually cost, it is fit. When the way you sell or deliver is genuinely unusual, forcing it into someone else’s data model means the team quietly works around the tool. A CRM nobody updates is worse than no CRM, because it produces confident, wrong reporting.
The arithmetic
Compare total cost over three to five years, not the first invoice. Per-seat licensing grows with headcount; a build is mostly front-loaded, with hosting and maintenance after. Somewhere between those two curves is a crossover point, and it moves earlier the more seats you need.
- Count every seat you will need, including part-time and read-only users.
- Add the cost of the integrations and add-ons you will inevitably buy.
- Add the internal hours spent on workarounds the tool forces.
- Against that, put the build cost plus roughly 15 to 20% a year for maintenance.
If the arithmetic is close, buy. A build only pays off when the answer is obvious.
There is also a middle path people forget: keep the CRM you have and fix the data flowing into it. A large share of CRM pain is not the CRM, it is that nothing else is connected to it.