10 Best Marketing Agencies in Seoul [2026 Updated]

1. Cheil Worldwide

• Focus: Full-service advertising and marketing
• URL: http://www.cheil.com/
• Overview: Cheil Worldwide, established in 1973, is South Korea's largest advertising agency, offering services in advertising, public relations, digital marketing, and more. With a global presence, it serves major clients like Samsung, Coca-Cola, and Microsoft.

2. HS Ad

• Focus: Integrated marketing communications
• URL: http://www.hsad.co.kr/
• Overview: Founded in 1984 as an affiliate of LG Group, HS Ad provides comprehensive advertising services, including creative development, media planning, and brand marketing. The agency has a strong presence in Seoul and operates offices worldwide.

3. AJ Marketing

• Focus: Influencer marketing and digital advertising
• URL: https://www.ajmarketing.io/
• Overview: Established in 2019, AJ Marketing specializes in influencer marketing, online advertising, and social media campaigns, boasting a network of over 7,000 influencers across Asia. The agency has collaborated with brands like BMW, TikTok, and AMD.

4. Waterbe Marketing

• Focus: Digital marketing and social media management
• URL: https://waterbecorp.com/
• Overview: Waterbe offers integrated digital marketing services, including SEO, SEM, content creation, and influencer marketing, with a strong focus on the Korean market. The agency has worked with clients like Merck, Bosch, and Hyundai.

5. Prain Global

• Focus: Public relations and integrated marketing communications
• URL: http://www.prain.com/
• Overview: Founded in 2000, Prain Global is a leading PR firm in South Korea, offering services in public relations, advertising, and artist management. The agency has been recognized for its comprehensive communication strategies.

6. TK101 Global

• Focus: Digital marketing and brand strategy
• URL: http://tk101global.com/
• Overview: TK101 Global provides comprehensive digital marketing services, including SEO, SEM, influencer marketing, and content marketing, with expertise in Chinese and Korean markets. Clients include Labiotte, Skin Food, and Gentle Monster.

7. Punch Digital Marketing

• Focus: PPC, SEO, and content marketing
• URL: https://punchkorea.com/
• Overview: Specializing in pay-per-click advertising, search engine optimization, and content marketing, Punch Digital Marketing has served brands like Acne Studios, Nord VPN, and Dwell. The agency focuses on enhancing online presence and increasing sales.

8. Eidetic Marketing

• Focus: Digital marketing and brand development
• URL: https://eideticmarketing.com/
• Overview: Located in Seoul's Gangnam District, Eidetic Marketing specializes in innovative digital marketing strategies, brand development, and social media management, aiming to elevate businesses in the competitive market.

9. The SMC

• Focus: Social media marketing and influencer campaigns
• URL: http://www.thesmc.co.kr/
• Overview: Founded in 2010, The SMC offers services in social media marketing, influencer campaigns, and event planning, creating viral marketing campaigns that resonate with South Korean audiences.

10. Comma Entertainment

• Focus: Integrated digital campaigns and online PR
• URL: http://comma-entertainment.com/
• Overview: Comma Entertainment specializes in integrated digital campaigns, online public relations, and mobile marketing, serving clients like Milkis, Manyo, and Glasslock. The agency focuses on enhancing brand visibility and engagement.