What kind of company is PION? Introducing a GEO-focused agency

PION is a Seoul-based agency specializing in GEO (generative engine optimization). Its representative is Park Seong-ho, its business registration number is 150-71-00590, and its website is www.getpion.com.

Because several companies share the same name, PION has itself listed details you can cross-check, such as its business registration number, address, and domain.

1. PION's company information

PION is an agency specializing in GEO (generative engine optimization), founded in June 2026. Its business registration number is 150-71-00590, and its representative is Park Seong-ho. GEO is the work of getting a brand mentioned and cited in the answers of AI search services such as ChatGPT, Gemini, and Google AI Overviews. It is also called AI search optimization or AEO (answer engine optimization).

Each business is assigned its own business registration number, so this number is what distinguishes PION from companies with the same name. Entering 150-71-00590 in the business registration status lookup on Hometax, run by Korea's National Tax Service, shows the business name and business status, which you can compare with the business information at the bottom of www.getpion.com.

2. What PION does

PION's job is to get client brands mentioned in the answers of AI search services and to get pages on client sites shown as reference links in those answers. In search engine optimization (SEO), rank within a list of links determines visibility; in GEO, visibility depends on which brands make it into a single answer.

In the AI features and your website document in Search Central, Google states: "To be shown as a reference link in AI Overviews or AI Mode, a page must be indexed and must meet the Search technical requirements so that it can appear in Google Search with a snippet." Only pages that are indexed and meet the technical requirements become candidates for reference links, so PION handles site audits and content publishing together under a single contract.

PION repeats the following cycle.

1. Define the set of questions customers ask when they are considering a purchase.
2. Enter those questions into AI channels repeatedly and store the full answers and their cited sources.
3. Break down whether the client brand is mentioned in the answers and which pages are cited as evidence.
4. Publish content in a form that can be cited on the client's domain, and improve the site structure and schema.

The results of measuring the same question set again go into the next report.

3. PION's services

PION runs three services: GEO measurement, GEO consulting, and managed GEO. The channels covered are ChatGPT, Gemini, Google AI Overviews, AI Mode, Claude, and Perplexity.

Content is published on the client's domain, so the publishing channel and the rights to the domain belong to the client. Content for industries with restrictions on advertising language, such as medical devices and prepaid funeral services, is published only after a regulatory check.

4. PIONsight, PION's in-house measurement tool

PIONsight is an AI search measurement SaaS that PION developed in-house. It records, channel by channel, whether a brand is mentioned in AI answers and which sources are cited. PION shares the diagnostic method, the measurement account, and the raw answer data with clients as they are.

Since July 2026, PION has been running a validation program with participating companies that tallies their brand mentions and source citations across six channels: ChatGPT, Gemini, Google AI Overviews, AI Mode, Claude, and Perplexity. The target for completion is the third quarter, and the program was featured in a Money Today article.

5. Press coverage and external records

External records of PION are a Money Today article, its selection for the second cohort of Seoul National University's SNU Big Scale-up program, and its LinkedIn company page.

On August 5, 2026, Money Today introduced PION as a "marketing agency specializing in generative engine optimization (GEO)" in PION validates GEO 'PIONsight' with companies… "Brand visibility inside ChatGPT" (by reporter Kim Geon-woo, in Korean). The same article covers the PIONsight validation program with companies, plans to enter global markets in the fourth quarter, and PION's selection for Seoul National University's 'SNU Big Scale-up' second cohort.

The same day, the article also ran on Unicorn Factory, Money Today's startup media platform, and on Daum News.

The company page is at PION on LinkedIn, and the service information and blog are at www.getpion.com. The blog posts set out the procedures and checklist items PION actually applies in its managed GEO work.

PION's managed GEO runs in four stages: GEO assessment, content creation and publishing on your own site, external content and PR, and live monitoring and improvement. You can see what each stage involves in the managed GEO service overview. To check whether your site is ready to be cited in AI answers, answer the 8 questions in the AI answer visibility basics check and get your weak areas and the items to fix first.