6 Best SEO Agencies in South Korea (2026)

The homepage states that across more than 350 projects as of 2025 clients averaged a 384 percent increase in search traffic after twelve months, and the firm publishes a recurring GEO index report. It also says GEO and AEO strategy is designed into every SEO project.

You want a measurable diagnosis of why a site is not being indexed or cited before committing to ongoing content spend.

• Publishes a standing GEO index report plus named case studies across several sectors
• Writes the agreed success measures into the contract up front rather than selling on keyword positions
• Client logo wall includes several major Korean enterprises

• The FAQ says the team focuses on diagnosis and written guidance rather than implementing code changes, with hands-on work limited to standard platforms
• Neither a founding year nor any pricing is published

The site states the company was incorporated in 2015 and has delivered more than 1,000 SEO and web projects across some 30 industries, and it publishes GEO rates openly rather than quoting privately. It ships its own tooling, including a public GEO entity check.

You want GEO work with a published monthly price and a defined GEO score rather than a bespoke quote.

• One of the few Korean firms to publish GEO rates openly
• Offers free self-serve GEO entity check and SEO score tools directly on the site
• The FAQ gives engine by engine timelines, putting ChatGPT citations at two to three months or more

• Based in Hanam rather than central Seoul, which matters if you want frequent in-person meetings
• Large corporate logos are presented as past SEO and web work, while the GEO track record is shown through a smaller set of measured reports

Its own SEO and GEO service page states the firm has delivered search projects for major Korean and international brands and has run global SEO work across more than 90 countries. The same page says it has supported GEO projects for major Korean manufacturers since 2024.

You are a large brand that wants query data and organic strategy handled by one team rather than a keyword ranking retainer.

• Publishes a detailed GEO section naming the engines it targets, including Google AI Overviews, ChatGPT, Gemini and Perplexity
• Operates its own search intent data product, so strategy is tied to first-party query data rather than third-party tools
• Maintains a Tokyo office in addition to Seoul, which helps for Japan market expansion

• No pricing or minimum engagement is published, so scope has to be settled through a sales conversation
• Positioning and named clients skew heavily to large enterprises, which may not suit a small business budget

Its GEO consulting page sets out three named plans and states that it checks brand exposure across ChatGPT, Gemini, Perplexity and Naver. The SEO FAQ names past projects with several major Korean corporates and media brands.

You want search and AI visibility run inside a full service creative agency that can also handle campaign and PR work.

• The GEO offer is productised into three defined tiers rather than sold as a vague AI add-on
• States that it measures entity level brand associations across categories and consumer needs instead of single prompt rankings
• Sits inside a major agency group, so creative, PR and media resources are available

• No pricing is published for any of the three GEO tiers
• The SEO subsite does not carry its own address or registration details, so company information traces back to the parent site

The site says the company consolidated expertise built up under a previous brand into the SEO Korea name, and its GEO consulting page describes LLM-friendly content structuring aimed at being cited by ChatGPT and Perplexity. The homepage client logo wall includes several international brands.

You want one Seoul partner that can build the site, earn the links and then handle AI citation work.

• Runs a dedicated GEO consulting page naming ChatGPT and Perplexity as target engines, kept separate from the SEO offer
• Publishes full company details in the footer, including registration number, representative and office address
• SEO consulting description covers Google and Naver algorithms together rather than Google alone

• No pricing or minimum engagement is published
• Paid backlink provision is a headline service, which some buyers treat as higher risk than purely editorial link earning

The homepage states the firm has been a trusted SEO company since 2001 and has collaborated with around 500 companies, naming several global brands and trade bodies. It says its search practice began as an official early search engine vendor, and it displays a Google Partner badge plus named client case studies.

You need one team covering Naver and Google together for a cross border launch into or out of Korea.

• One of the longest running search specialists in Korea, with the site stating continuous operation since 2001
• Separate documented service pages for Naver SEO, Japan SEO and ecommerce SEO rather than one generic offer
• Publishes dated case studies and lists a Google Partner badge

• Generative search work sits inside the SEO offer as a combined global and generative AI pillar rather than a standalone GEO service page, the weakest GEO claim in this set
• No pricing or minimum project size is published