Custom CRM

A custom CRM your team actually opens.

A focused diagnostic at €490, deducted from the project if we continue, and a fixed quote after a free 30-minute call. Depending on your situation, I tune the tool you already have, I connect your tools to each other, or I build the one that follows the way you work. If a well-configured HubSpot solves your problem, I will advise against a custom CRM.

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Scoped Sprint from €2,500 · You own the code · No commitment

Three delivery modes

Three possible answers, only one right for you.

Custom is not always the right answer: sometimes a tune-up is enough. Scoping exists to pick the cheapest mode that actually solves the problem.

Setup & repair of a market CRM

Pipedrive, HubSpot or Brevo configured around your actual process, or an existing CRM put back on its feet: a simpler pipeline, fields that matter, a trained team.

  • Pipedrive, HubSpot, Brevo configuration
  • Repair of an existing market CRM
  • Data migration, deduplication, access rights
  • Team training on its own pipeline
The right mode when

the tool is right but badly wired: confusing pipeline, empty fields, a team re-typing everything in Excel on the side.

Discuss this mode
The signature mode

Fully custom CRM

When your business does not fit the boxes of a generic tool, the CRM gets modeled on your real processes. That is the path taken for e-Enfance / 3018: an all-in-one, sovereign CRM that no generic tool could bring together.

  • Modeled on your real processes, not on a template
  • Multichannel and realtime where your work needs it
  • Sensitive data handled, hosted wherever you decide
  • No per-seat licence
The right mode when

your work is specific: associations, SMEs with atypical processes, sensitive data, teams growing without wanting to pay per seat.

Book a call

Integrations & automations around your CRM

Your CRM is fine, but everything around it is manual. I connect billing, support, email and enrichment with n8n: records create and complete themselves, and the right people get notified at the right time.

  • Automatic sync between your CRM and your other tools
  • Automatic record enrichment
  • Targeted Slack or email notifications
  • No more double data entry
The right mode when

the data already exists somewhere, and someone copies it into the CRM by hand every single day.

Discuss this mode

The right mode gets picked during a 30-minute scoping call. If tuning your current tool is enough, I say so and we stop there.

Real case · e-Enfance / 3018

Market CRM first, custom when it had to be.

e-Enfance is the French child-protection association that operates 3018, the national helpline for young victims of online violence. Before, the helpline teams had no tool able to keep up with urgent cases on highly sensitive data. Today, they work in a single tool modeled on their real situations. I designed and built this custom CRM, Emma, and the project is public.

01

Worked on their market CRM

I first made the existing platform serve the helpline teams, with no anti-vendor dogma.

02

Structural limits

Missing multichannel intake, helpline flows the tool could not model, highly sensitive data: every change was paid for in complexity.

03

An informed exit

Replacement was only proposed after every possible tune-up had been tried. The new CRM was designed around how the 3018 teams actually work.

04

A sovereign CRM in production

Multichannel, realtime, sensitive data protected. The teams work in a tool designed for them, and the association owns its system.

This reference is public and detailed on the projects page. Other CRM work stays anonymized.

Trust & compliance

Your data, your code, your rules.

A CRM holds your clients, your deals, and sometimes far more sensitive material. The frame is set before the first line of code.

•

You own the code

Git repository in your name, admin access, documentation. Bring it in-house or switch providers at any time, with no hidden dependency.

•

GDPR and France / EU hosting

Data minimization, role-based access rights and a hosting location chosen to match your requirements, all designed in from the start.

•

One single point of contact

The person who scopes is the person who codes, deploys and maintains. No subcontracting: you always know who touches your data.

•

Maintenance and NDA

Ongoing care through a monthly retainer: fixes, evolutions, adaptations when a connected tool changes. NDA signed on request, before any detailed exchange.

FAQ

Questions about custom CRM work.

Off-the-shelf CRM or custom CRM: how do I choose?

Always start with the market. If Pipedrive, HubSpot or Brevo covers most of your process, good configuration will cost less than development. Custom is justified when workarounds pile up: processes the tool cannot model, missing multichannel intake, sensitive data, per-seat licences inflating as the team grows. That is the reasoning behind the custom CRM of 3018.

How long does a custom CRM take?

Tuning or repair is counted in days. Automations, in days or weeks. A fully custom CRM is built over several weeks: first a working product covering the most critical flow, put in the team's hands, then iterations. The precise timeline is set during the 30-minute scoping call.

What about my data, where is it hosted?

Wherever you decide. For a custom CRM, the servers are chosen with you and you hold the keys. That is the model used for e-Enfance / 3018, which handles particularly sensitive data. For a market tool, hosting depends on the vendor: that criterion enters the selection from the very first call.

Do I keep the code of the CRM?

Yes, entirely, with the documentation to go with it. You can bring maintenance in-house or hand it to another team at any time. The monthly retainer is an option, not an obligation.

Can you fix an existing market CRM?

Yes. A slow CRM, automations stacked on automations, unreadable fields, a team re-typing everything in Excel: that can be repaired without throwing everything away. And if the audit shows the tool is no longer the right one for you, I say so, with arguments.

How much does a custom CRM cost?

A short, tightly scoped first engagement, the Sprint, starts at €2,500. A fully custom CRM is quoted based on channels, processes and data requirements. The quote is fixed after the 30-minute scoping call.

A CRM your team will actually use.

Tell me how your team works today, even if it all lives in Excel. In 30 minutes I tell you which of the three modes solves your problem, and whether a simple tune-up is enough.

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Mathieu Haye is a freelance CRM consultant based in Paris. He works at three levels: setup and repair of market CRMs (Pipedrive, HubSpot, Brevo), automations around an existing CRM, and fully custom CRM development when market tools genuinely do not fit. Public reference: the CRM built for the French child-protection association e-Enfance / 3018.

What does a freelance CRM consultant actually do?

A freelance CRM consultant covers what a classic CRM integrator does, without the agency structure around it. For an SME, that means: choosing the tool that matches the real process, configuring it, migrating and deduplicating the data, wiring the useful automations and training the team on its own pipeline. For an association or nonprofit, specific constraints come on top: volunteers and staff in the same tool, sometimes sensitive beneficiary data, budgets that rule out licence inflation. Mathieu Haye handles both profiles directly, from scoping to production. Working formats are described on the collaboration page, and the full service range on the AI freelance page.

CRM problems rarely get solved in the abstract: book a scoping call or describe your situation to my AI agent. The e-Enfance / 3018 case is detailed on the projects page and the rest of the work on the home page. To go further: custom web app, n8n automation, AI agent developer, AI agent for SMEs, AI freelance, AI visibility, AI maturity test, or the journal.

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