Custom CRM

What it means

A custom CRM is built around one company’s processes instead of bending them to fit a packaged product. It makes sense where the sales process really is unusual - multi-step approval, non-standard pricing, a link into production.

The difference from packaged CRM is not only the build cost but who carries maintenance, updates and security. Your own system means your own vendor for the life of it.

Custom does not have to mean built from scratch. Between packaged and fully bespoke there is a middle route: a ready CRM extended with in-house modules, or an open source base the company adapts. Such a setup covers most standard functions, and development goes only into the part where the company’s process genuinely differs from everyone else’s.

How it works in practice

The sensible order is to check first whether a ready tool with an API and integrations will do. If not, run a feasibility study and write the RFP around the process, not around screens.

In the books a bespoke build is usually a long-term intangible asset and is amortised, while small changes and support are a service. Draw that line before the invoice, not after.

When writing the brief we agree with the client which data the system must pass to the books: job number, cost centre, VAT rate, due date. Those fields then drive the sub-accounts and cost-centre reports. If this is settled only after go-live, invoices from the CRM get retyped by hand or patched afterwards, which costs more than the whole set-up would have.

What to watch out for

The biggest risk is vendor lock-in. The contract has to cover ownership of the source code, documentation, access to the data in a usable format and an export path - otherwise changing vendor means changing system.

The build budget gets calculated; running costs often do not. Hosting, updates, bug fixes and changes when legislation moves cost money every year. Whoever ignores them ends up after two years with a system nobody touches and growing technical debt that costs more to pay down than regular maintenance would have.