Best UX Design Agencies in Seoul (2026)

Introduction

Seoul has a deep bench of UX firms, and the 12 below cover UX research and consulting, UX writing, product design, and the larger digital agencies that design and build platforms. They were chosen for recent work, 2025 and 2026 recognition, and the strength of their client rosters.

Much of the market’s work comes from a small set of demanding sectors. Banking, insurance and securities apps feature heavily on these firms’ project lists, along with telecoms, retail and large corporate sites for groups such as Samsung, LG, Hyundai and SK. The past two years have added a new line of work: pxd now runs an AI tools unit, Right Brain lists an LG Physical AI Platform project starting in 2026, and both Teaminterface and ETRIBE offer optimisation for AI search. Awards remain a useful public record here, particularly ICT Award Korea, whose 2026 winners were announced in August.

Every firm here has an active office in Seoul in 2026, confirmed from the firm’s own site or a dated trade or review page. The list is unranked, since the right choice depends on your product, budget and how much of the build you want one partner to handle.

The best UX design agencies in Seoul

1. pxd

Korean company · Seongsu-dong · pxd.co.kr

pxd is a UX consultancy with more than 20 years in business and a service range that runs from research and data analytics through UX writing, design systems and front-end development. It also runs pxdAX, a unit building AI tools for UX work, including Affinity Bubble for qualitative research analysis and Writone for UX content.

Finance is its best-documented sector, with clients including Korea Investment & Securities, KB Securities, Hana Bank, KB Kookmin Bank, Hyundai Capital and Kyobo Life. It cites a network of more than 20 UX specialist firms for research abroad, which helps on products launching outside Korea, and offers accessibility consulting through a partnership with SCE Korea.

2. Right Brain

Korean company · Gangnam-gu · rightbrain.co.kr

Right Brain covers UX research, consulting, strategy, information architecture and UI design, with AI chatbot and voice interface work alongside. Its rebuild of the MG The Bank app and internet banking for Saemaeul Geumgo won Gold at the 2025 A.N.D Award, and its LG CNS corporate site renewal took Silver.

Its client relationships run long. The site lists work on LG Electronics’ LGE.com since 2021 and KT’s Genie TV since 2015. New engagements in 2026 include LG’s Physical AI Platform UX and digital twin UX consulting for SK hynix, so it suits teams with complex enterprise or industrial products as well as consumer apps.

3. Teaminterface

Korean company, founded 1996 · Seocho-gu · teaminterface.com

Teaminterface began in January 1996 as a UI-focused firm, which makes it one of the longest-running names on this list. Its work covers UX research, CX strategy, UX and UI design, and design systems. KB StarFX, its foreign exchange platform for KB Kookmin Bank, won the A.N.D Award Grand Prix and an i-AWARD finance Grand Prize in 2024.

Other projects include a customer language guide for Hyundai Motor, Shinhan Bank’s eFX platform, a UX evaluation system for LINE, and global web and app improvements for Lotte Hotels. It sells UX4D as a regular diagnosis and improvement programme, and has added GEO consulting for brands that want to appear in AI answers.

4. Wirelink

Korean company · Bangbae-dong · txwriting.com

Wirelink specialises in UX writing and CX writing, including service messages, and also builds writing automation tools. In August 2026 it released a UX writing standard guide for public services, and in October it registered copyright for version 1.0 of those guidelines, which Digital Insight reported as an industry first.

Its client base leans heavily on finance: Samsung Card, Shinhan Card, KB Kookmin Bank, Hana Bank, Samsung Life and Kyobo Life among them. Projects include UX writing consulting for Hana Bank’s Hana One Q and Samsung Life’s customer guidance content, which won a Grand Prix at ICT Award Korea 2023. It works best as a specialist alongside a design partner.

5. Does Interactive

Korean company · Mapo-gu · does.kr

Does Interactive is a design, web and interactive content group with a strong recent award record. Its English-language site for Samsung Seoul Hospital, which reorganised more than 90 departments around booking and doctor search for international patients, won a Red Dot Design Award in 2026 and a Platinum Prize at ICT Award Korea 2026.

Its Lotte Time Villas website took a Red Dot in 2025 and an iF Design Award in 2026, and its KT&G corporate site won Gold at the 2025 A.N.D Award. Clients include Samsung, Hyundai, Hanwha, Kakao, BMW and Nexon. It also makes virtual exhibitions and interactive installations, which is useful for brands that want digital and physical experiences from one team.

6. ETRIBE

Korean company, founded around 2006 · Mapo-gu · etribe.co.kr

ETRIBE is a digital agency led by CEO Lee Ju-min, covering UX and CX strategy, platform development and brand experience, with a long sideline in immersive and 3D content. It won six prizes at the 2025 i-AWARDS Korea, including grand prizes for the Lotte Hotel global chain website and GS Caltex’s Kixx brand site. In October 2026 it won two honours at the 20th Science and Technology Innovation Awards.

Its project list includes the Samsung Everland Resort integrated app, the KB Insurance app, and SK Telecom’s T Membership global travel service. Digital Insight covered its GEO platform for AI search visibility in May 2026. One of the 2025 prizes went to the website for Gallery eTRIUM, an exhibition space connected to the firm.

7. Emotion Global

Hyper Corporation affiliate · Gangnam-gu · emotion.co.kr

Emotion Global is a full-service digital agency offering UX consulting, planning, design, development and operations under one roof. Its Samsung SRA Asset Management site renewal took a Platinum Prize at ICT Award Korea 2025, and its O’Food Global site for Daesang took Gold. CEO Kang Seung-jin, who cites about 30 years in UI and UX, received a Minister of Science and ICT commendation the same year.

Clients include Samsung Electronics, SK Telecom, Nike, emart24, LG Innotek and Hyundai Department Store, and projects include chatbot work for SK Telecom’s T services. The firm was named a Seoul-type strong small business in September 2026. It suits clients who want a single partner from consulting through to running the live service.

8. Wylie

Korean company · Nonhyeon-dong · wylie.co.kr

Wylie combines app and web development, platform operation and UI and UX consulting with digital advertising. At the 2025 A.N.D Awards its IBK mobile branch won Silver in finance, and its renewal of the MVNO Hub site for the Korea Association for ICT Promotion won Gold. In July 2026 it launched Growth It, a brand operations platform service.

Banking and retail dominate the client list, with KB Kookmin Bank, Shinhan Bank, BGF Retail’s CU, Ediya Coffee, Kraft Heinz and LUSH named. Recent work also includes PI consulting for KB’s core banking modernisation and a training LMS for Meritz Fire. It also sells performance marketing and branding, so ask for product design references if that is the brief.

9. The 51

Korean company, founded 2011 · Yeoksam-dong · the-51.com

The 51 describes itself as a digital marketing agency, and UX consulting is among its services. It had a strong 2026 at ICT Award Korea, taking the Grand Prix in digital experience innovation for kt M mobile’s MOBI and a Grand Prize in the industry category for LG Energy Solution. In 2025 its Woori Bank MVNO build won a Grand Prix in digital promotion.

Other clients include GS Retail, Hyundai Motor, Lotte Hotel, LG Electronics and Amorepacific. In May 2026 the firm announced a move to a “lightweight organisation” model aimed at faster decisions, so it is worth asking how your team would be staffed.

10. Pentabreed

Korean company · Seocho-gu · pentabreed.com

Pentabreed is a 25-year-old digital creative firm working across web and app platforms, marketing and TV advertising. It won four prizes at ICT Award Korea 2026, and CEO Park Tae-hee received a National Assembly Speaker’s commendation at the same event. Digital Insight counted 14 wins across digital and advertising awards for the firm in 2025.

On the experience side, its April 2026 rebuild for car-sharing company Greencar split corporate and service sites, reorganised the information architecture, moved to server-side rendering and added a unified admin system. It also runs design operations for Samsung Fire’s online channels. Several of its 2026 prizes went to campaigns, so ask to see platform work specifically.

11. HEYHICOMPANY

Korean company, founded 2019 · Jung-gu · heyhicompany.com

HEYHICOMPANY is a smaller UX and UI web and app studio in Signature Tower, with 10 to 49 staff listed on Clutch and a stated minimum project of $5,000. It covers UX consulting, development, branding, 3D and motion, and its client work includes UI and UX design for CJ ENM’s Mnet Plus and UX consulting for the Small Enterprise and Market Service.

Much of its recent public record is overseas. Clutch reviews posted in June 2026 cover Lviv IT Cluster’s event site, a farm-monitoring app for SensorInsight in the US, and a trading-signal platform for Quantmatix in Ireland. All five reviews rate it 5.0. It suits startups and mid-sized teams who want design and build together on a smaller budget.

12. Plus X

Korean company, founded 2010 · Gangnam-gu · plus-ex.com

Plus X is a design consulting group founded in 2010, best known for brand experience, with UX, UI and development teams working alongside. The reason to consider it for UX work is the link between brand and product design. It marked its 15th anniversary in July 2025, and runs the training platform Share X with Fastcampus, including UX research and UI courses taught by its staff.

Past clients include BTS, Alipay, Tencent, CU, 11st and 29CM, along with projects on KT’s Genie TV and the taxi platform UT. Its reputation rests mainly on brand experience, so ask for product work that has shipped and is still live.

What to look for in a Seoul UX design agency

Start by deciding how much of the job you want to hand over. Consultancies such as pxd, Right Brain and Teaminterface lead with research, strategy and design, while firms such as Emotion Global, ETRIBE and Wylie can also build and operate the service. A single partner shortens handovers. A separate consultancy can give a more independent view of the existing product, which helps when an in-house team or system integrator will do the build.

Ask for work in your sector, and look at how long it stayed live. Financial apps carry regulatory and security constraints that shape every screen, and retail and platform products have their own conversion and operations pressures. Right Brain, for example, lists work on KT’s Genie TV going back to 2015. A relationship of that length tells you more than a launch case study does.

Check how the firm handles AI and accessibility, because both now appear in many briefs. Some agencies have built their own AI tools or sell AI search optimisation, and it is reasonable to ask which parts of a project use them and how outputs are reviewed. For public sector and global products, ask about accessibility testing and research outside Korea, and confirm the working language if your team is overseas.

Finally, ask how research and design decisions are recorded. A long UX project produces session recordings, transcripts, prototypes, design system files and rounds of stakeholder comments, and large corporate clients can bring reviewers from several departments. An agency with a clear review process, and one place to find the latest version, is easier to work with once the project is under way.

How Fabric helps UX design teams

Fabric gives a UX agency one workspace for research, design files and client feedback, with AI search across all of it. The setup for UI and UX agencies is built around one space per client, with briefs, prototypes, recordings and decks kept together.

Research is usually the hardest material to find again. Uploaded interview and usability recordings are transcribed and made searchable, with clickable timestamps that jump to the moment a participant said something. Search works by meaning across documents, images, PDFs and transcripts, as well as connected apps such as Google Drive and Notion, so a team can check what earlier studies found before starting a new one.

For early design work, the canvas is an infinite whiteboard that embeds Figma files alongside references and notes, which suits journey maps and concept reviews.

Reviews run through shared links. A client given commenter access can leave annotations without signing up: draw on a screen image and attach a comment, leave timestamped comments on a prototype walkthrough video, or highlight text in a PDF specification. The team marks each comment completed as it is resolved, so feedback works like a checklist. There is a walkthrough in how to get client feedback on a design. Finished deliverables such as a research report can be published as a web page, which is view-only and takes no comments.

On Team plans, self-writing docs can maintain a page for each client from meetings, Slack and the workspace, covering decisions, deliverables and open items. Fabric uses AES-256 encryption and holds CASA Tier 2, and customer data is not used to train AI models. Whether that meets a bank’s or insurer’s own requirements is for that client’s security and legal teams to determine.

Team plans start from $125 a month. See plans for teams.

Frequently asked questions

What is the best UX design agency in Seoul?

There is no single answer, as it depends on the product and the scope. On 2026 recognition, The 51 won a Grand Prix at ICT Award Korea for kt M mobile’s MOBI, and Does Interactive won a Red Dot for Samsung Seoul Hospital’s English site. For research-led consulting, pxd, Right Brain and Teaminterface have the longest public track records on this list.

Which Seoul UX agencies have the most experience with banking apps?

Finance appears across most of this list. pxd names a long roster of banks, securities firms and insurers. Right Brain rebuilt MG The Bank, Teaminterface designed KB StarFX, Wylie built IBK’s mobile branch, and Wirelink handles UX writing for several card companies and banks.

Should I hire a UX consultancy or a full-service digital agency?

A consultancy suits teams with their own developers or a system integrator already in place, and those who want research and strategy on an existing product. A full-service agency suits projects where one partner should handle design, build and often operations afterwards. Many Seoul firms offer some of both, so ask which team members would stay on after launch.

Do Seoul UX agencies work with overseas clients?

Some do. HEYHICOMPANY’s 2026 Clutch reviews come from clients in Ukraine, the US and Ireland, and pxd offers research in cities including San Francisco, London, Tokyo and Frankfurt through its partner network. Does Interactive’s Samsung Seoul Hospital project was built for international patients. Confirm the working language and time zone cover early in any conversation.

What is the difference between a UX agency and a branding agency in Seoul?

UX firms work on how a product or service functions, using research, information architecture and interface design. Branding firms work on identity, strategy and how a company presents itself. Plus X appears here because it does both, and our list of branding agencies in Seoul covers firms that lead with identity work.

Related lists

UX design agencies in other cities: New York · London · Los Angeles · Singapore · Sydney

More in Seoul: Creative agencies · Design agencies · Branding agencies · Marketing agencies · Social media agencies · Content studios

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