5 days
for a complete business website, versus 4–6 weeks at an agency
Augmented production
Our engineers drive AI agents that generate, test and document code. One senior now produces what used to take a team of four, in a fraction of the time.
Web & mobile agency · AI-augmented production
Agency-grade web & mobileproducts, deliveredat a fraction of the price.
We industrialised our production with AI. The result: websites, tools and apps shipped faster, tested better, and billed 2–3× below a traditional agency. With no compromise on quality.
- First navigable version within 72h
- You own the code, fully
- 30-day guarantee
grangus · production pipeline0%
- 01 scopingscope + fixed quote
- 02 generationsupervised AI agents
- 03 senior review100% of code reviewed
- 04 testse2e · perf · a11y
- 05 deployCI/CD · monitoring
› every delivery goes through all five stages. no exceptions.
Why it works
The price drops. The standard doesn't.
Our pricing doesn't come from cutting corners. It comes from a production chain rebuilt end to end.
0
intermediaries between you and the code
Zero overhead
No project managers, no sales layer, no extra meetings. You talk directly to the people building your product.
95+
Lighthouse score targeted on every delivery
Measured quality
Systematic human review, automated tests, performance and accessibility checked before every release.
We are not the cheapest option for a shaky project. We are the most rational option for a serious one.
Services
Four levels. One standard.
From a business website to a mobile app, pick the level that matches your need. Everything else is identical: careful design, clean code, guaranteed delivery.
01
Business website
Your image, at the level of your ambitions.
From
€1,500
Timeline · 5 business daysfirst navigable version within 72h
A fast, elegant, well-ranked website that turns visitors into enquiries.
Included
- Custom design, no templates
- Technical SEO and multilingual setup
- Edit your content yourself
- Hosting, analytics and contact form
Examples
- Consulting firm
- Restaurant or hotel
- Startup launch
- Premium craftsman
After delivery · Optional support from €90/month
Request a quote02
Workflow automation
Your repetitive tasks, executed without you. And monitored.
From
€1,900/ workflow
Timeline · 1–2 weeksfirst end-to-end run within 5 days
Alerts, scraping, information gathering and qualification, syncing between your tools. With or without AI agents. Pays for itself from 2–3 hours saved per week.
Included
- Mapping of the real process
- Connectors (CRM, Slack, Sheets, email…)
- Error recovery and failure alerts
- Handover documentation
Examples
- Competitor monitoring & alerts
- Web data extraction
- Inbound lead qualification
- Automated reporting
After delivery · Support & monitoring: €90/month (hosting, alerts, adapting to API changes)
Request a quote03
Website & business tooling
Web software that runs your operations.
From
€3,900
Timeline · 2–3 weeksclickable prototype within 72h
Appointment scheduling, client portals, back-offices, task automation: a web application built around how you actually work.
Included
- Authentication and roles
- Database and API
- Dashboards and exports
- Online payments if needed
Examples
- Appointment scheduling
- Client portal
- Ads platform (Sekai Ads)
- Custom back-office
After delivery · Optional support from €90/month
Request a quote04
Mobile app & games
iOS, Android, gaming: a product that fits in a pocket.
From
€7,900
Timeline · 4–6 weekstestable build on your phone within 2 weeks
Cross-platform native apps and mobile games, from concept to store release.
Included
- iOS and Android, one codebase
- App Store and Google Play release
- Monetisation, analytics, push
- Backend and live updates
Examples
- Casual or hyper-casual game
- Companion app for a service
- Mobile marketplace
- Internal field app
After delivery · Optional support from €90/month
Request a quoteIndicative prices excl. VAT, precisely quoted and fixed after scoping. Timelines start once scoping is validated and your content is received. We decline projects we can't deliver to our standard.
Process
Four steps, no grey areas.
At any moment you know what's done, what's left, and what it costs.
- 0148h
Scoping
A 30-minute call, then a written scope and a fixed quote. No vague packages, no open-ended time & materials.
- 0272h
Prototype
A navigable version of your product before we build everything. You validate on something real, not on slides. That validated scope becomes the project's reference.
- 03per service
Production
Short sprints, a demo every week, access to the code repository from day one. You watch the product take shape.
- 0430-day guarantee
Delivery & guarantee
Go-live, a 30-minute training to edit your own content, documentation. For 30 days, anything that was in scope and doesn't work is fixed for free.
Work
What we build.
Products that are live, used and measured. Not mockups.
Business tool · Ads platformIn production
Sekai Ads
An advertising campaign management platform designed and built by Grangus Corp.
- Problem
- Managing multi-account campaigns means constant manual back-and-forth between ad networks, spreadsheets and teams.
- Solution
- A centralised web app: campaign creation and tracking, automated reporting and alerts on performance anomalies.
Type
B2B SaaS
Delivery
Concept → prod
Internal tool · AutomationIn progress
Grangus CRM
Our own back-office: inbound enquiries, prospect tracking, and content versioning for this very site.
- Problem
- Track every prospect, follow up at the right time, and test variations of our sales copy without piling up tools.
- Solution
- A lightweight CRM wired to this form, with a prospect pipeline, automated follow-ups and landing page version management.
Type
Back-office
Status
Continuous iteration
Stack
- Next.js
- PostgreSQL
- AI agents
- Webhooks
Business website · MultilingualIn production
This website
This landing page was produced with our pipeline: designed, coded, tested and shipped in a single day.
- Problem
- Demonstrate, rather than claim, what AI-augmented production delivers on a demanding business website.
- Solution
- Custom design, FR/EN by URL, SEO and sharing optimised, form wired to the CRM, continuous deployment on Vercel.
Timeline
1 day
Lighthouse
95+
Stack
- Next.js 16
- Tailwind
- Vercel
- Server Actions
Technology
Sober, durable technical choices.
- Next.js
- React
- TypeScript
- Tailwind CSS
- React Native
- Expo
- Unity
- Swift / Kotlin
- Node.js
- PostgreSQL
- Supabase
- Redis
- Claude
- OpenAI
- Playwright
- n8n
- Vercel
- Railway
- GitHub Actions
- Sentry
- Next.js
- React
- TypeScript
- Tailwind CSS
- React Native
- Expo
- Unity
- Swift / Kotlin
- Node.js
- PostgreSQL
- Supabase
- Redis
- Claude
- OpenAI
- Playwright
- n8n
- Vercel
- Railway
- GitHub Actions
- Sentry
Web
Next.js · React · TypeScript · Tailwind CSS
Mobile & games
React Native · Expo · Unity · Swift / Kotlin
Backend & data
Node.js · PostgreSQL · Supabase · Redis
AI & automation
Claude · OpenAI · Playwright · n8n
Infra & quality
Vercel · Railway · GitHub Actions · Sentry
FAQ
What we get asked before signing.
Why are you cheaper than a traditional agency?
Because we produce differently. AI agents handle the repetitive work (code generation, tests, documentation) under the control of senior engineers. And we have no sales or management layer to fund. Billed time is building time.
Does AI write all the code?
No. AI accelerates, engineers decide. Every line we ship is reviewed, tested and understood by a human who is accountable for it. You receive readable, documented code that any team can maintain.
Who owns the code and the accounts?
You do, entirely, upon final payment. Code repository, domain name, hosting, databases: everything is in your name. No dependency on us.
How do quoting and payment work?
After a scoping call, you receive a written scope and a fixed price within 48 hours. 30% deposit to start, balance on delivery. Longer projects are paid by milestone.
That fast — is it really serious?
Yes, because the speed comes from production, not from shortcuts. AI agents generate and test, a senior engineer reviews every delivery, and performance and accessibility checks are automated. What we don't compress: scoping with you, your feedback rounds, and for mobile, app store review.
What is covered after delivery?
For 30 days, anything that was in the validated scope and doesn't work as intended is fixed for free. A fix is a gap with what was validated. A change is a new request, however small: it is quoted separately, from day one.
What if I want a change after delivery?
Three options, chosen before delivery so there are no surprises: on demand (a fixed fee per small change, delivered within 48h), a prepaid pack of hours, or monthly support from €90 including hosting, monitoring, updates and small changes. And since you own the code, you can also hand the next steps to anyone you like.
Do you work with clients outside France?
Yes. We work remotely, in French and English, with clients across Europe and beyond. Communication happens over video calls and messaging, with a weekly checkpoint.
Contact
Describe your project in two sentences.
Human reply within one business day. Fixed quote within 48 hours after scoping.
No newsletter, no cold outreach. One reply, a useful one.
Or directly:
contact@granguscorp.com