# Best Advertising Agencies in Seoul (2026)

Finding the right advertising agency in Seoul is easier when you have verified client reviews to guide you. Explore 25 advertising agencies in Seoul, including top-rated Core-A and adsland, with real client feedback covering quality, responsiveness, and results. With an average rating of 4.4★, 626 client reviews, you have real data to compare. Compare pricing, team sizes, and industry focus to find the agency that fits your goals and budget in 2026. No paid placements.

25 agencies · Avg rating 4.4★ · 626 client reviews

## Ranked by review data

Showing 1-25 of 25.

1. [Core-A](https://www.pickanagency.com/agencies/core-a-seoul) - 5.0★ (32 reviews) - Seoul, South Korea - Advertising, Digital Marketing
2. [adsland](https://www.pickanagency.com/agencies/adsland-seoul) - 4.9★ (520 reviews) - Seoul, South Korea - Advertising
3. [안녕옥외광고](https://www.pickanagency.com/agencies/seoul-56) - 5.0★ (2 reviews) - Seoul, South Korea - Advertising
4. [AJ Marketing (Korea)](https://www.pickanagency.com/agencies/aj-marketing-korea-seoul) - 5.0★ (2 reviews) - Seoul, South Korea - Advertising
5. [TDCX South Korea - Seoul Campus](https://www.pickanagency.com/agencies/tdcx-south-korea-seoul-campus-seoul) - 5.0★ (1 review) - Seoul, South Korea - Advertising
6. [Top Seoul, South Korea Business Directory | Get Found with Avalinks - Free Local & Global Listings (KR)](https://www.pickanagency.com/agencies/top-seoul-south-korea-business-directory-get-found-with-avalinks-free-local-global-listings-kr-seoul) - 5.0★ (1 review) - Seoul, South Korea - Advertising, Digital Marketing
7. [Scarlet The Design House](https://www.pickanagency.com/agencies/scarlet-the-design-house-seoul) - 5.0★ (1 review) - Seoul, South Korea - Advertising
8. [comma(콤마)\_Korean Global Marketing Agency](https://www.pickanagency.com/agencies/comma-korean-global-marketing-agency-seoul) - 4.8★ (20 reviews) - Seoul, South Korea - Advertising
9. [Web Design Korea](https://www.pickanagency.com/agencies/web-design-korea-seoul) - 4.6★ (5 reviews) - Seoul, South Korea - Advertising
10. [Verticurl (a WPP Company) South Korea](https://www.pickanagency.com/agencies/verticurl-a-wpp-company-south-korea-seoul) - 3.0★ (1 review) - Seoul, South Korea - Advertising
11. [데이블(Dable) I Content Discovery & Native Advertising Platform](https://www.pickanagency.com/agencies/dable-i-content-discovery-native-advertising-platform-seoul) - 4.5★ (11 reviews) - Seoul, South Korea - Advertising
12. [Assembly Seoul](https://www.pickanagency.com/agencies/assembly-seoul-seoul) - 3.7★ (6 reviews) - Seoul, South Korea - Advertising
13. [CJ MezzoMedia](https://www.pickanagency.com/agencies/cj-mezzomedia-seoul) - 4.3★ (18 reviews) - Seoul, South Korea - Advertising
14. [Focus Media Korea](https://www.pickanagency.com/agencies/focus-media-korea-seoul) - 2.3★ (6 reviews) - Seoul, South Korea - Advertising
15. [Keystone Marketing Company](https://www.pickanagency.com/agencies/keystone-marketing-company-seoul) - Seoul, South Korea - Advertising
16. [마케팅미](https://www.pickanagency.com/agencies/seoul-7) - Seoul, South Korea - Advertising
17. [Karla Otto Seoul](https://www.pickanagency.com/agencies/karla-otto-seoul-seoul) - Seoul, South Korea - Advertising
18. [Mig's Marketing Solutions](https://www.pickanagency.com/agencies/migs-marketing-solutions-seoul) - Seoul, South Korea - Advertising
19. [Access Communication & Consulting Co. Ltd.](https://www.pickanagency.com/agencies/access-communication-consulting-co-ltd-seoul) - Seoul, South Korea - Advertising
20. [Wieden+Kennedy Seoul](https://www.pickanagency.com/agencies/wieden-kennedy-seoul-seoul) - Seoul, South Korea - Advertising
21. [2ADVANCED - Driving Digital Performance](https://www.pickanagency.com/agencies/2advanced-driving-digital-performance-seoul) - Seoul, South Korea - Advertising
22. [Edge Communications](https://www.pickanagency.com/agencies/edge-communications-seoul) - Seoul, South Korea - Advertising
23. [I Look Studio Channel](https://www.pickanagency.com/agencies/i-look-studio-channel-seoul) - Seoul, South Korea - Advertising
24. [Prism Communications](https://www.pickanagency.com/agencies/prism-communications-seoul) - Seoul, South Korea - Advertising
25. [BRIGHTBELL CREATIVE GROUP](https://www.pickanagency.com/agencies/brightbell-creative-group-seoul) - Seoul, South Korea - Advertising

## Popular services in Seoul

- [Digital Marketing in Seoul (14 agencies)](https://www.pickanagency.com/best-digital-marketing-agencies/south-korea/seoul)
- [Media Buying in Seoul (6 agencies)](https://www.pickanagency.com/best-media-buying-agencies/south-korea/seoul)
- [Social Media Marketing in Seoul (6 agencies)](https://www.pickanagency.com/best-social-media-marketing-agencies/south-korea/seoul)

## Advertising agencies in other South Korea cities

- [Advertising in Busan](https://www.pickanagency.com/best-advertising-agencies/south-korea/busan)
- [Advertising in Daegu](https://www.pickanagency.com/best-advertising-agencies/south-korea/daegu)

## Frequently asked questions

### How many Advertising agencies are in Seoul?

We currently list 25 Advertising agencies in Seoul, South Korea, with an average rating of 4.4★ across 626 reviews. Core-A is currently the top-rated. Browse their profiles and reviews to find the right partner.

### How do I choose an Advertising agency in Seoul?

Compare agencies based on client reviews, campaign results, industry expertise, and pricing. Look for agencies in Seoul with experience in advertising and a track record of delivering strong ROI.

### What should I expect to pay for Advertising services in Seoul?

Pricing varies by scope and agency size, and most agencies don't publish rates. Agency profiles on Pick an Agency show a minimum budget when the agency discloses one. Request quotes from multiple agencies in Seoul to compare.

### Can I hire an Advertising agency in Seoul remotely?

Yes. Many Advertising agencies in Seoul work with remote clients. While a local agency can offer in-person meetings, remote collaboration is standard in the industry and gives you access to a wider talent pool.

### How does Pick an Agency rank advertising agencies in Seoul?

Rankings are computed, never sold. No agency can pay to appear higher, and we take no money from the agencies listed. The default order uses a credibility-weighted score rather than the raw star average: a rating only earns its full weight once there is a real volume of reviews behind it, so a perfect 5.0 built on two or three reviews does not outrank a strong score backed by hundreds. That correction matters, because most agencies in this index sit at or near a perfect 5.0, which makes the star average on its own close to meaningless. [See the full ranking methodology](https://www.pickanagency.com/methodology).

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