The CRM market is enormous and the options are genuinely good. Salesforce, HubSpot, Pipedrive, Monday, Zoho. All of them work. All of them have free tiers that turn into meaningful monthly costs once you need more than basic functionality. The question of whether to build a custom CRM rather than buy one of these is not primarily a technical question. It is a financial and strategic one.
The 3-year cost calculation you should do before deciding
The error most businesses make is comparing the upfront cost of a custom build to the monthly cost of a SaaS CRM. The correct comparison is the total cost over three years. Take your current or intended SaaS CRM cost per month, multiply by 36, add implementation costs, add any customisation work you have paid for or expect to pay for, add the cost of any integrations. Compare that total to the cost of a custom build that does exactly what you need. For most businesses running a team of five or more on a mid-tier SaaS CRM, the three-year costs are comparable.
What makes a CRM genuinely need to be custom
Off-the-shelf CRMs are built around common sales and relationship management workflows. If your workflow matches those assumptions reasonably well, buying is almost certainly right. If your workflow diverges significantly from those assumptions, you will spend significant time and money configuring the CRM to approximate what you need, and you will never quite get there. The signals that a custom CRM is worth serious consideration: you have tried two or more CRMs and neither fit without significant workarounds. Your pipeline stages do not map to the standard model.
What a custom CRM actually needs to do
A custom CRM built for a specific business does not need to replicate every feature of Salesforce. It needs to do the specific things your team actually does, well. Contact and company records with the fields your team actually uses. Activity tracking. Pipeline view showing where every deal stands. Reporting that answers the questions your leadership team actually asks. Integrations with the specific tools you use. A bespoke CRM that does six things well outperforms a generic CRM that does sixty things adequately for most teams.
The build process that avoids expensive mistakes
The custom CRM projects that go wrong almost always go wrong in the same place: starting to build before the requirements are fully understood. Spending four weeks on requirements before writing a line of code produces a better outcome than spending four weeks building and discovering you got the data model wrong. The requirements for a CRM are what you discover you need after you have mapped your actual sales process and interviewed the people who will use it daily.
What to expect in terms of cost and timeline
A custom CRM for a team of five to twenty people typically costs between £8,000 and £20,000 depending on complexity and the number of integrations. It takes eight to sixteen weeks to build properly. The ongoing cost after launch is hosting - typically £30 to £100 per month on a cloud platform. No per-user licence. No annual price increases. No features locked behind a higher tier.
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