Custom CRM or HubSpot/Salesforce: When It Makes Sense to Build Your Own

The question shows up when the HubSpot bill starts to hurt, or when the team has quietly stopped using Salesforce and actually works on a parallel spreadsheet.

“Wouldn’t it be better to build our own?”

Honest answer: almost never on the first try. But for some companies, at some point, yes. Here is how to tell the two cases apart without regretting it.

Key takeaways:

• A custom CRM makes sense when your sales process is your competitive edge, not when you just want to save on the subscription.
• The real comparison is not list price versus sprint, it is total cost over 2-3 years including integrations, add-ons and hours lost adapting to the standard tool.
• The safest route is hybrid: standard to validate the process, custom only for the part that differentiates you.
• At Soraia a custom CRM starts with a €10-50k sprint, first release in 4 weeks, and the code is yours from day one.
• If your process will change in 3 months or you have fewer than 10 salespeople, stay on the standard tool. Building custom on an unstable workflow is waste.

What is a custom CRM

A custom CRM is a relationship management system built around the real processes of a single company, rather than configured inside the predefined fields of a standard product like HubSpot or Salesforce. The data model, flows and integrations follow the way you sell, not the other way around. The code belongs to the company.

The practical difference: with standard you adapt the company to the software, with custom you adapt the software to the company. Neither is better in the absolute. It depends on how generic or distinctive your sales process is.

Criterion 1. Is your sales process core or accessory?

This is the question that comes before all the others.

If you sell the way everyone in your industry sells, with standard pipelines, classic stages and normal forecasts, a standard CRM is designed exactly for you. Paying to build it from scratch would be reinventing the wheel.

But if your sales process is the competitive edge, for example a complex match between demand and supply, a proprietary scoring logic, a multi-stakeholder approval flow, then forcing it into HubSpot makes you lose precisely what sets you apart.

That is what we saw with Talent Match: their “Braint” platform could not live inside a standard CRM, because the ATS, CRM and AI matching had to talk to each other in a way no off-the-shelf product allowed. There, custom was not a luxury, it was the product.

Practical cut-off: if your sales process fits into a standard HubSpot demo without “workarounds”, you do not need a custom CRM.

Criterion 2. Total cost over 2-3 years

The list price is deceptive. HubSpot at a few tens of euros/user/month looks unbeatable against a €10-50k sprint.

Then come:

• The tier jump when you grow in users or features.
• The add-ons (marketing hub, sales pro, premium integrations).
• The hours/month the team loses adapting to the limits of the standard tool.
• The custom integrations you pay a consultant for anyway.

Do the math over the real horizon. With 40 salespeople at €100+/user/month, the subscription exceeds €48k/year. At that point a custom build, with your own code and zero perpetual fee, pays for itself quickly.

Practical cut-off: if the cumulative cost of the standard CRM over 3 years exceeds 1.5-2 times the cost of a build, the comparison is worth opening seriously. The method to do it right is the same as build vs buy on software.

Criterion 3. Where the data actually lives

A brutal and infallible test: does your team run a second, shadow system?

If salespeople update the CRM out of obligation but make the real decisions on a shared spreadsheet, personal notes or a parallel Notion, the standard tool is not serving you. It is just charging you a subscription for an archive nobody consults.

A well-built custom CRM eliminates the shadow system because it is built around the way the team actually thinks. It is not magic: it is that the fields, flows and automations match the real work.

Practical cut-off: if six months after adopting the standard tool there is still a parallel spreadsheet for critical decisions, you have a fit problem that custom can solve.

The real average answer: hybrid

For most SMEs the best answer is not “either standard or custom”. It is both, in sequence.

1. Start with HubSpot or Salesforce to validate the process and understand what you really need.
2. Identify the part that differentiates you (matching, scoring, proprietary workflow).
3. Build custom only that part, integrating it with the standard tool or replacing it entirely when it makes sense.

This is the same approach as our custom software development projects: €2,000 scoping refunded if you proceed, €10-50k build sprint, first release in 4 weeks, your code from day one. And of our sales & marketing automation sprints, where the AI agent often lives on top of the existing CRM instead of replacing it.

When NOT to build a custom CRM

I will tell you straight if you call me:

• Standard sales process → HubSpot/Salesforce, full stop. Building would be waste.
• Fewer than 10 salespeople → the standard subscription is cheaper than any sensible build.
• Unstable process → if the workflow will change in 3 months, a custom CRM is born old. Stabilise first, then build.
• Zero baseline → if you do not know how many hours the team loses today with the current system, you cannot judge whether custom pays off.

To figure out which case you are in: let’s talk for 20 minutes, or start with the custom software scoping.