Available for new projects

The site, app or automation you are missing.

KLYVE is a custom development studio. Websites, online stores, web apps, internal tools and automations. Designed, coded and shipped by one person who answers you directly.

Get my free mockup → Estimate my project
Quote within 24h and a fixed price Free mockup within 2 working days Working in English and French
KLYVE IN 30 SECONDS

From the customer's first click to the request in your tool.

This film was fully coded by KLYVE, with no editing software. The sites and tools it shows are our demos, which you can try further down.

STARTING COSTS NOTHING

We show you first. You decide after.

Before asking you for a single euro, we build a mockup of your project: the home page of your website, or the first screen of your app. It is free, and it is yours to keep. We are sure of what we offer, and sure you will like it: that is why we would rather show you than promise you. If you like it, we carry on at a fixed price. If not, you owe us nothing.

  1. You describe what you needThrough the form or by email, in a few lines. No meeting required.
  2. Free mockup within 2 working daysA real page that looks like you, that you can open on your phone and show around.
  3. You like it: fixed quoteThe price is set before we start and does not move. You don't: we stop there, at no cost.
Get my free mockup → No commitment, no card, no sales call.
01 · WHAT WE BUILD

One person, from the first call to the day it goes live.

No agency, no outsourcing, no project manager between you and the code. You talk to the person who builds it.

01

Websites and landing pages

A fast, clean site built to convert. Custom design, fully responsive, optimised for search engines and for loading speed.

02

Online stores

Catalogue, cart, secure checkout, order management. On Shopify when that is the right call, fully custom when you need more.

03

Custom web apps

When no off-the-shelf tool matches how you actually work, we build the one that does. User accounts, data, permissions.

04

Internal tools, CRM and ATS

Track your clients, candidates, stock or projects. A clear back office that finally replaces the spreadsheets lying around.

05

Automations

Repetitive work goes on autopilot. Make, Zapier, n8n or custom scripts. Quotes, follow-ups, invoices, reports, syncing.

06

Integrations and APIs

We make your tools talk to each other. CRM, billing, email, database, payments. Data flows, you stop copying it by hand.

02 · ESTIMATE

A price and a timeline, right now.

Answer four questions. The range updates live. It is not a quote, but it is honest and it is the right ballpark.

What you want to build
Project size
Options
Timeline
Estimated budget
260 – 430 EUR
Estimated timeline
2 weeks
    Get the exact quote →

    Indicative estimate, excluding third-party costs (domain name, licences, subscriptions). The quote we send once we have gone through it together is firm and itemised.

    03 · WHAT WE BUILD

    We do not sell software. We build yours.

    The websites and applications below are not a catalogue, and none of them is for sale. They exist so you can judge our work before talking to us. Each one starts from a specific trade and solves a real problem on the ground, where off the shelf software stops at a dashboard. Each one is whole, opens with no account and no sign up, and you can create, edit, wipe everything and start again. The businesses shown are fictional and every piece of data is generated, none of it comes from a client. The applications themselves are in French.

    Websites

    Verbeke Ouvertures

    Website, joinery firm

    The website of a Lille joiner: services, grants explained, service area. The quote form creates the deal straight in Atlas, with the call to make.

    Open →

    Le Coup de Cloche

    Website, brasserie

    The website of a Wazemmes brasserie. Online bookings land straight in the floor software, with the table, allergies and full slots in real time.

    Open →

    Business apps

    Atlas

    CRM for a renovation firm

    Paste a prospect's email and the job creates itself, address, works and grants included. Every morning Atlas lists the quotes that went quiet with the follow up already written, and lost deals keep their reason.

    Open →

    Comptoir

    Delicatessen, web shop and till

    One stock for the counter and the website. Sell the last jar at the till and the online shop shows Sold out within a second, while the supplier order drafts itself.

    Open →

    Ardoise

    E-invoicing ready invoicing

    Every mention required by the French 2026 e-invoicing reform is checked as you type, the structured XML exports in one click, and bank transfers match themselves to invoices, deposits and progress bills.

    Open →

    Vivier

    High volume hiring

    A three minute mobile application with no CV, interview slots picked by the candidate, and a human reply sent to everyone still waiting. No invented scores, and a blind mode for the first screening.

    Open →

    Salle

    Brasserie in full service

    Every table announces when it will be free, so walk-ins get a precise wait, booked tables stay protected, and a sold out dish disappears from the QR menu in a second.

    Open →

    Your line of work is not on this list

    That is the case almost every time, and it is precisely our job. A workshop, a practice, a charity, a laboratory, a wholesaler: none of them works like the next one, and none of them fits inside software designed for everybody. Tell us what your team does by hand today, and we will tell you what should be built, how long it takes and what it costs. No commitment, and no phone call.

    Describe your need →
    04 · PROCESS

    Four steps, no bad surprises.

    STEP 01

    You describe

    Tell us what you have in mind through the form or by email, even if it is vague. We come back with precise questions.

    STEP 02

    Free mockup, then a fixed quote

    Within 2 working days, a free mockup of your project. If you like it, an itemised quote with a firm price and a delivery date. If not, you owe nothing.

    STEP 03

    Build

    You follow progress on a live link, updated continuously. You watch it take shape and you can correct course any time.

    STEP 04

    Delivery

    Going live, a handover session, and thirty days of fixes included. Then monthly maintenance if you want it.

    05 · QUOTE

    Tell us about your project.

    Describe what you need, even in two lines, even if it is not fully clear yet. We come back within 24 hours with precise questions and a quote.

    → Reply within one business day → Free mockup within 2 working days, no commitment → Or by email: hello@klyve.fr

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