Custom business software developer in Rennes

I build management software for small and medium businesses in Rennes and Brittany that replaces Excel files, paperwork and repetitive tasks: scheduling, inventory, quotes, time tracking, bookings.

The tools I build

Each tool is designed around the way you work and the people who use it every day. It then grows with your business.

Scheduling and field work

Organise jobs, rounds or appointments, with an up-to-date schedule for the whole team.

Stock and inventory

Track incoming and outgoing items and stock counts, with QR labels if needed.

Quotes, invoices and customer follow-up

Prepare quotes faster, track invoices and find each customer's history.

Time tracking

Replace timesheets with simple entry, per job if needed, and ready-to-use reports.

Online booking

Let your customers book on their own, without back-and-forth emails or missed calls.

Automation and AI

Sort incoming requests, extract data from your documents or answer your customers' frequent questions.

How I work

One point of contact, from the first call to maintenance.

01
Call

A free first call

We look together at how you work and what wastes your time. If existing software is enough, I will tell you.

02
Quote

A clear fixed-price quote

Scope, price and milestones are set before we start: no bad surprises along the way.

03
Development

Delivery in stages

You test the tool as the project progresses and your feedback is taken into account before launch.

04
Support

Launch and follow-up

I import your existing data, train your team and take care of maintenance and improvements.

How much does custom business software cost?

Business app at a fixed price

€5,000 to €15,000

The price depends on the number of screens, users and connections to your existing software. Most small business tools fall within this range; a more complete platform can cost more. The price is set in the quote, before we start.

Maintenance and improvements

€100 to €300 per month

Hosting, backups, updates and fixes, depending on the tool. Larger improvements are quoted separately.

Net prices: VAT not applicable (article 293 B of the French General Tax Code).

The first call and the quote are free.

Business apps already in production

Izidoor — Sports & leisure booking SaaS platform
WebsiteSaaSBusiness app

Izidoor — Sports & leisure booking SaaS platform

2025-07-01

SaaS booking and back-office platform for sports and leisure facilities: scheduling, payments, invoicing, and team management. Reliable and scalable solution.

En savoir plus
Gest-Time — Work time management software for businesses
WebsiteBusiness appSoftware

Gest-Time — Work time management software for businesses

2022-01-15

SaaS work time tracking software: hours entry by project, weekly validation, anomaly alerts and reporting to manage team activity.

En savoir plus
Stockpme — Stock and inventory management software for SMEs
WebsiteSaaSBusiness app

Stockpme — Stock and inventory management software for SMEs

2022-03-01

SaaS stock management software for SMEs: product tracking, inventory movements, QR labels and statistics to improve traceability and logistics management.

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SignDex — HTML Email Signature & Brand Asset Generator
SoftwareBusiness app

SignDex — HTML Email Signature & Brand Asset Generator

2026-05-08

Tool to generate clickable HTML email signatures for Gmail, Outlook, and Apple Mail—individual or team-wide—plus flyers, business cards, and more.

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GoupixDex — Scan, Price, and Sell Pokémon Cards on Vinted and eBay
SoftwareBusiness appAI

GoupixDex — Scan, Price, and Sell Pokémon Cards on Vinted and eBay

2026-04-09

Web and desktop software for reselling Pokémon cards: scan recognition, Cardmarket pricing, Vinted, eBay, and Leboncoin listings, inventory and margin tracking.

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DevLeadHunter — Automated Prospecting for Selling Websites to Tradespeople
SaaSBusiness appAI

DevLeadHunter — Automated Prospecting for Selling Websites to Tradespeople

2025-10-24

SaaS that finds tradespeople without websites, generates a demo site in their name, runs A/B email campaigns, and publishes the site upon payment.

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Frequently asked questions

How much does custom business software cost?

At a fixed price, between €5,000 and €15,000 for most small business tools (scheduling, inventory, quotes, time tracking). The price depends on the number of screens, users and connections to your software; a more complete platform can cost more. It is set in the quote before we start, and maintenance then costs €100 to €300 per month depending on the tool.

How long does it take to build the tool?

The timeline is set in the quote depending on the scope. I deliver in stages: you use a first version quickly, then the tool grows with your feedback.

Why a freelancer rather than an agency?

You talk directly to the person who designs and builds your tool, from the first call to maintenance. Fewer intermediaries, faster decisions and a price without agency overheads.

Do you only work in Rennes?

I am based near Rennes and travel within Rennes, Ille-et-Vilaine and Brittany when useful. I also work remotely with businesses across France.

Can you take over our Excel files?

Yes. I import the data from your existing files into the new tool, so your team does not start from scratch.

What if existing software is enough?

I will tell you on the first call. Custom software only makes sense when off-the-shelf tools do not fit the way you work.

An Excel file getting out of hand? Let's talk about your tool.

Describe your need in a few lines: I will reply within 24 hours with a first idea of the solution and budget.

Discuss my project