Open Company Data in South Korea: Official Sources, APIs and Reuse Rights

South Korea has a serious official company-data ecosystem, but it should not be reduced to a simple list of companies. The right way to evaluate South Korea is to start with the official register, then add open-data, statistics, procurement, intellectual-property and regulator layers.

The strongest route is the Korean Open Government Data Portal, National Tax Service business-registration status API, Open DART disclosures, KIPRISPlus, KOSIS, KONEPS/G2B procurement and regulator data. That makes South Korea a strong API market with important legal-register caveats, but it does not remove the usual reuse checks: dataset terms, attribution, no-endorsement language, privacy, marketing-law boundaries and source freshness.

This guide maps the main official sources for company data in South Korea, explains what each source can and cannot do, and shows where a normalized CompaniesData-style dataset adds value.

Quick Answer

South Korea is a strong official API market because data.go.kr, the National Tax Service business-registration status API, Open DART, KIPRISPlus and procurement/statistics APIs provide useful machine-readable layers, even though formal court-register extracts are a separate controlled-access route.

For practical work, the most useful source stack is: Open Government Data Portal, NTS business registration verification and status API, NTS API opening notice, Open DART API, DART disclosure system, Supreme Court Internet Registry Office.

The safe editorial answer is this: South Korea has strong public and official business-data sources, but public data is not automatically bulk-downloadable, marketing-ready or free of personal-data constraints.

What Counts as Company Data in South Korea?

Reuse Rights and Compliance

Across jurisdictions, public-sector-information and open-data policies can support reuse, but country-specific registry, API and privacy rules remain decisive. In practice, South Korea's actual reuse position still depends on each source, endpoint, licence and access method.

• Cite official sources and preserve update dates where the source provides them.
• Do not imply that a derived dataset is endorsed by the registry or public authority.
• Do not mix public register data with marketing-contact permission.
• Check whether API, bulk download, paid extract and web-search access have different terms.
• Treat officers, beneficial owners and natural-person data as privacy-sensitive under GDPR, POPIA, local data-protection or marketing-law rules where applicable.

publishable with explicit caveats that Korea has strong APIs but no simple free Companies-House-style full company-register bulk feed

Main Official Sources

1. Open Government Data Portal

Owner: official open data. Access: https://www.data.go.kr/en/index.do.

• What it gives: Discovery hub for APIs and public datasets. Access model: catalogue / REST / downloads
• Reuse value: dataset-specific public-data licence
• Main limitation: Each dataset has its own endpoint, approval and licence metadata.

2. NTS business registration verification and status API

Owner: official API. Access: https://www.data.go.kr/data/15081808/openapi.do.

• What it gives: Verify business-registration numbers and status at scale. Access model: REST API / JSON / XML
• Reuse value: public-data portal terms; no restriction shown in portal metadata where applicable
• Main limitation: Status verification, not a full company-register profile or contact dataset.

3. NTS API opening notice

Owner: official open data. Access: https://www.data.go.kr/en/bbs/ntc/selectNotice.do?originId=NOTICE_0000000002110&pageIndex=1.

• What it gives: Evidence of API purpose and availability. Access model: notice / documentation
• Reuse value: public-data portal terms
• Main limitation: Notice is not the API spec itself.

4. Open DART API

Owner: regulator / official API. Access: https://engopendart.fss.or.kr/intro/main.do.

• What it gives: Disclosures, major filings and financial statement enrichment. Access model: API / XML downloads / financial data
• Reuse value: Open DART terms and API conditions
• Main limitation: Filing-obligated companies only; not all registered businesses.

5. DART disclosure system

Owner: regulator. Access: https://dart.fss.or.kr/.

• What it gives: Manual verification of company disclosures. Access model: search / documents
• Reuse value: DART terms
• Main limitation: Primarily securities-disclosure scope.

6. Supreme Court Internet Registry Office

Owner: official registry. Access: https://www.iros.go.kr/.

• What it gives: Legal corporate-register extracts and certificates. Access model: search / certificate / paid or controlled access
• Reuse value: controlled registry terms
• Main limitation: Not a free open bulk source; Korean-language and access/payment constraints.

7. KIPRISPlus

Owner: official IP. Access: https://plus.kipris.or.kr/eng/main.do.

• What it gives: Patent, design and trademark enrichment. Access model: bulk data / REST API
• Reuse value: KIPRISPlus product terms
• Main limitation: IP metadata is an enrichment layer, not legal entity registration.

8. KIPRIS search

Owner: official IP. Access: https://kipris.or.kr/khome/main.do.

• What it gives: Manual IP verification. Access model: search
• Reuse value: KIPRIS terms
• Main limitation: Search interface, not bulk company data.

Practical Options

Official open-data or API route

Use data.go.kr and the NTS business-registration status API for identifier/status checks, Open DART for disclosure-enrichment, KIPRISPlus for IP data, KOSIS for statistics and KONEPS/G2B for procurement, while treating the Supreme Court registry as controlled legal-register access.

Contact-data and marketing-list route

For sales outreach, company identity data is only the first layer. Business emails, phone numbers, contact roles, suppression logic and segmentation require a separate compliant contact-data process. That layer should be documented separately from official registry reuse.

Private reports and risk products

Private company-report providers can be useful for manual due diligence in South Korea, but the editorial focus here is not a directory of competitors. The strategic value is understanding which official sources exist and where normalization is required.

What Is Missing from Official Open Data?

• The NTS status API verifies business-registration status but is not a full legal company profile or contact dataset.
• Open DART covers listed and filing-obligated companies, not the whole universe of registered businesses.
• Court registry extracts and certificates should not be described as free open bulk company data.
• Business status, disclosure or procurement data does not create permission for cold-email or phone outreach.

This is why company-data products often add value even when the underlying public sources are strong: official data is frequently split across authorities, formats, languages, identifiers and access models.

How CompaniesData Adds Value

For South Korea, CompaniesData's role is to turn fragmented source material into a usable business dataset: normalized company names, deduplicated entities, consistent country and activity fields, source provenance, update tracking and enrichment hooks.

• Normalize register identifiers and legal names.
• Match official company records with procurement, IP, LEI and regulator signals.
• Flag source provenance so every derived profile can be audited.
• Separate company identity from contact-data and marketing-permission layers.
• Package data for analysis, CRM enrichment and market research instead of forcing users to parse portals manually.

Request a CompaniesData sample for South Korea if you need a practical dataset rather than a list of source portals.

Source Matrix

South Korea is a strong API market: the Open Government Data Portal exposes official APIs, the National Tax Service business-registration status API is high-volume, Open DART covers disclosures, KIPRISPlus supports IP bulk/API access and KONEPS/procurement sources are mature. The caveat is that formal corporate registration extracts are tied to court/registry systems and are not equivalent to a free public bulk register.

FAQ

Is there a single free official bulk company database for South Korea?

Not always. South Korea has official company-data sources, but bulk access, API access, paid extracts and web search can be separate products. Do not assume a complete free bulk file unless the specific source proves it.

What is the best first source for South Korea company data?

The best first source is the Korean Open Government Data Portal, National Tax Service business-registration status API, Open DART disclosures, KIPRISPlus, KOSIS, KONEPS/G2B procurement and regulator data. It should then be combined with statistics, procurement, IP and regulator sources.

Can public company data be reused commercially?

Often yes, but only under the conditions of the specific source. Attribution, update-date preservation, no-endorsement wording and GDPR controls may apply.

Can I use registry data for cold email marketing?

No automatic conclusion follows from public registry access. Marketing requires a separate lawful basis, suppression handling and contact-data compliance review.

Why use CompaniesData instead of manually collecting South Korea sources?

Manual collection is slow because identifiers, formats, languages and coverage differ by source. CompaniesData adds normalization, matching, deduplication, provenance and practical delivery formats.

Sources

• Open Government Data Portal – official open data
• NTS business registration verification and status API – official API
• NTS API opening notice – official open data
• Open DART API – regulator / official API
• DART disclosure system – regulator
• Supreme Court Internet Registry Office – official registry
• KIPRISPlus – official IP
• KIPRIS search – official IP
• KOSIS Open API – official statistics
• KONEPS / G2B – official procurement
• KONEPS English guide – official procurement
• Public Procurement Service statistics API – official API
• Fair Trade Commission data portal API guidance – regulator