GestFact
My own invoicing, quotes and client-management application for freelancers and small companies, with Peppol e-invoicing. Developed and maintained since 2017.
InvoicingQuotesPeppol
Custom software · AI · Automation
Your repetitive tasks,
automated your way
with software and AI
A qualified analyst-programmer, I have been designing custom business management software for Belgian companies for more than 10 years. I build in automation and AI to eliminate double data entry and repetitive tasks. A single point of contact, from analysis to maintenance, anywhere in Belgium.
AI & automationQualifiedAll of Belgium
10+
years of custom software
20+
years of IT experience
€0
first conversation & quote
One developer, one contact, from analysis to maintenance
- Qualified analyst-programmer
- Custom software since 2015
- AI & automation, under your control
- Built-in Peppol e-invoicing
- All of Belgium, remotely and on-site
What I do
What I build for you
Business software tailored to you, repetitive tasks handed over to the machine, and AI where it genuinely helps. With a single contact, from analysis to maintenance.
Custom softwareBusiness software built around the way you work
Clients, quotes, invoices, stock, planning: one web-based tool, available anywhere, that grows with your business. Since 2015.
Discover custom software
AutomationWhat repeats can run on its own
Quotes and invoices, payment follow-up, double data entry, documents, alerts: data entered once, and you approve what matters.
See what I automate
Artificial intelligenceAI prepares, you approve
An assistant on your website, data entry prepared by voice, explainer videos: AI where it genuinely helps.
Discover AI for your business
Video
What I automate, in 34 seconds
Video won’t start? Open the video (MP4, 1.8 MB)
Read the transcript (English translation)
Entering the same invoice twice. Redoing calculations by hand. Chasing payments, re-typing… What if your software did it for you? Brice Bisiau builds your custom management tools. Peppol e-invoices, syncing, alerts: whatever repeats runs on its own. AI prepares. You approve. Over ten years of custom software, and always the same contact person for your website, your network and your cameras. Free first conversation: bisiau.be.
Work
What I have already built
No made-up case studies: real software, including one you can try right now. I don’t publish my clients’ names without their consent.
This site’s AI assistant
It answers your questions, qualifies your request and sends it to me on Telegram. If you wish, I take over the conversation live. It’s the same kind of assistant I can add to your website.
AILead captureHuman handover
For my clients
Custom management software I designed, each one built around a trade.
Christmas tree production and sales
From planting to invoice: plantations, species, sizes and grades, field work and workers, orders, delivery notes and pallets, returns, supplier purchases, profitability and Peppol e-invoicing.
ProductionSalesProfitability
Home automation and electronics distribution, with a repair workshop
Sales, orders and supplier purchases, repair tickets, warranty billed to the manufacturer or to the client, partial invoices and credit notes, Peppol e-invoicing and one-click transfer to the accountant. In use since 2015.
After-salesSalesPeppol
Real estate agency
Website and back office to manage properties for sale and for rent: listings with energy certificate, floor plans and documents, virtual tours, centralised enquiries, reviews and statistics, access for the whole team.
Real estateBack officeWebsite
Method
From the task that weighs on you to the tool that handles it
We start with what matters most, you test as we go, and the tool grows with your business.
1 · Task analysis
We review how you work: what repeats, what gets copied over, what could run on its own. I tell you honestly what is worth automating. This first conversation is free.
2 · A clear proposal
A detailed quote: tasks automated, what stays manual, tools to connect, timeline and budget. Fixed-fee or hourly.
3 · Step-by-step development
I develop in stages, with the help of AI agents, and you test as we go on your real data. Your existing data is migrated if needed.
4 · Go-live & follow-up
Training, go-live, maintenance and improvements: the software grows with your business, and I remain your contact.
And also
Your IT specialist for everything else
Websites, 360° tours, cameras, networks, IT repair: the services clients have trusted me with for years are still available, at the same prices and with the same contact.
Web & visibility
Custom websites & redesign
from €149Fast, responsive showcase websites, with hosting and domain name included for the 1st year.
E-commerce stores
Catalogue, secure payment, order management, and training so you stay independent.
Search engine optimisation (SEO)
Technical optimisation, content and structure to get found on Google.
+ AutomationAn AI assistant like the one on this site, or a website connected to your management software, quote on request.
Image & immersion
+ AIPresentation videos with a synthetic voice, quote on request.
Infrastructure, security & support
Video surveillance
from €399Full-HD day/night camera, Synology recording server, mobile app and installation.
Networks & Wi-Fi, UniFi expert
Wi-Fi from €19Seamless Wi-Fi, RJ45 cabling, 3G/4G internet backup with automatic failover.
Multimedia & NAS
from €599Your private Synology cloud, up to 12 TB.
Home automation
Lighting, heating, blinds and scenes controlled from your smartphone.
Computer repair
Slowdowns, viruses, failures, data recovery: a clear diagnosis and a quick return to normal.
Hardware advice & sales
Mini-PC €389100% independent advice, with no brand imposed.
Already automatedHome-automation scenes, automatic failover of your internet connection, cameras you can check from your phone.
Brice Bisiau
Qualified analyst-programmer · Software, AI & automation
AI & automation
About
Brice Bisiau, the developer behind your tools
A qualified analyst-programmer and IT professional (bachelor’s degrees as analyst-programmer and IT technician, recognised by the French Community of Belgium), I have more than 20 years of experience in IT. Based in Marche-les-Dames, near Namur, I work across the whole of Belgium, both remotely and on-site.
- One contact: the person who writes the code
- Independent, honest advice
- Software maintained for the long term
- What the AI prepares, you approve
FAQ
You’re probably wondering…
In practical terms, what can you automate for me?
Anything that repeats and follows a logic: quotes and invoices, payment follow-up, double data entry between programs, sending and filing documents, stock or deadline alerts, appointments, calculations, data migration. AI comes in where it genuinely helps: answering your customers’ questions, preparing a data entry, producing an explainer video. The free first conversation is about spotting what is worth automating for you, and what isn’t.
Does my need justify custom software?
Not necessarily. A custom tool can start from a single task: a calculation redone by hand, information entered twice. During the first conversation, I tell you honestly whether custom software makes sense or whether an existing solution will do.
How much does custom software or an automation cost?
It depends on the number of tasks and the tools to connect. After a free first conversation, I give you a clear quote, fixed-fee or hourly, with no hidden costs. We can start with a single task, then grow the tool from there.
Will the AI make decisions for me?
No. Safe automations (synchronisations, meter readings, scheduled sends) run on their own, following rules you approve at the outset. Whatever the AI prepares (a draft, an entry, a reply) arrives “to review” and waits for your approval. For anything that must be exact every time, such as amounts, I favour programmed rules over AI.
Let’s talk about your project
The first conversation and the quote are always free. I reply quickly, Monday to Saturday.