Celis — web studio · Seoul, Korea
Web design & development for startups and small teams.
We help companies launch corporate sites and web apps that read as credible in three seconds. Every case in our portfolio is a live URL — and before you sign anything, we show you a working screen.
Selected work
Three live builds you can open right now — two studio projects held to production standard, and this site itself.
Meridian Ventures — bilingual VC brand site
Concept to a live, EN/KO bilingual site in 2 days — studio brief, no client rounds
SalesFit — community & review platform
Full product UI: feeds, reviews, admin console · Korean UI, demo data
celis.co.kr — our own site
Interactive 3D WebGL, custom shaders, five-stage scroll narrative · Korean
What we build
Corporate & B2B websites
Company sites that survive the three-second credibility check — information architecture, copy, and performance handled by the same team.
Custom web applications
Dashboards, platforms, and internal tools on Next.js and PostgreSQL, designed around your workflow rather than a template.
Interactive 3D & WebGL
Three.js / React Three Fiber experiences for brands that need more than a static page. Our own site is the proof.
Redesign & rescue
We take over stalled or abandoned projects, audit what exists, and finish them — without starting from scratch.
A working screen before any contract
Hiring a studio on the other side of the world is a leap. We take the leap out of it: describe what you need, and we build a working preview of one key screen — before any contract or deposit. You judge the real thing in your browser, not a proposal deck.
Working across time zones
Seoul runs ahead of the US and Europe, and we treat that as a feature: a brief sent at the end of your day lands at the start of ours, and the working preview is in your inbox by morning.
We're async-first — email and shared documents, so every decision and preview is in writing. We take calls by appointment; US mornings work well for us. Our team has strong working English.
What happens after you email
- 01
A real reply within one business day
Questions, our read on what is feasible, and a price band — not a calendar link. One business day on your clock: Seoul runs ahead of the US, so your evening email meets our working morning.
- 02
A working preview, if it helps
One key screen built from your brief and deployed to a URL you open — before any contract or deposit. Usually three to five business days. We take on a limited number of these each month; if we are full, the reply says so.
- 03
A fixed quote
An itemized scope of work, milestones with dates, and a fixed price. No hourly billing, no open-ended line items.
- 04
Build, review, handover
You review at milestones. On final payment, source code, design files, the domain, and hosting accounts all transfer to you.
Common questions
What does a project cost?
Most projects fall between $1,500 and $6,000, fixed price. The lower end works when we build on our existing component kit and keep the scope to a fixed set of pages; fully custom design and application work sits at the upper end. You get a fixed quote with an itemized scope of work before anything starts — no hourly billing.
How long does a project take?
Most corporate sites run two to four weeks including your review rounds. Web apps are scoped individually — the quote states the timeline milestone by milestone.
How does payment work?
A deposit to start; the balance once you have reviewed and accepted the finished work. You have five business days to review. We invoice from our registered business in South Korea; payment is a standard international bank transfer.
Who owns the work?
You do. Source code, design files, the domain, and hosting accounts all transfer to you on final payment.
What if something goes wrong?
Every quote defines revision rounds and acceptance criteria before we start. Bugs found within 30 days of acceptance are fixed at no charge, and monthly care plans are available after that. If you stop a project midway, you keep everything delivered up to that point.
We’re not sure what we need yet — can we still get in touch?
Yes — a rough idea or a reference site is enough. We reply with questions, our read on feasibility, and, where it helps, a working preview of the screen that matters most. No deposit for that.
Tell us what you're building
Start with whatever you have — two sentences or a full brief. Your email goes to Wanwoo Sim, the studio's founder, not a sales queue, and you'll have a reply within one business day on your clock.