THAILANDSICThailand Standard Industrial Classification

TSIC Activity

80300

Investigation activities

ประกอบกิจการให้บริการงานสืบสวน ค้นหาข้อมูลในเชิงพาณิชย์

What this activity covers

Companies provide independent investigative services, including private detective work.

  • Commercial investigations — Services for businesses to investigate matters
  • Private detective services — Independent investigation by licensed detectives
  • Inquiry services — Investigative services to gather information

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

19
active companies operate here
฿24.4Mregistered capital, combined
฿39.7M
Sector revenue · 2025
-40% since 2023
฿4.9M
Net profit · 2025
8 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
0%of new registered capital is foreign-held
฿0 foreign฿1.0M Thai

Based on few new registrations this year — read as a rough signal only.

New in 2026

1+0.0%

registrations, YTD

Registered capital

฿24.4M+4.3%

since year-end

Largest by revenue

Latest filed-year revenue, not a multi-year total

  1. 1Tri Mit Business and Law Co., Ltd.฿13.0M
  2. 2Santitham and Business Co., Ltd.฿11.0M
  3. 3Ed and Ad Pack Co., Ltd.฿4.2M
  4. 4Bangkok Detective Co., Ltd.฿3.0M
  5. 5Sky International Legal Co., Ltd.฿2.7M

Largest by registered capital

  1. 1P.S. International Investigation Co., Ltd.Bangkok฿6.0M
  2. 2Hanuman Guardian Solutions Co., Ltd.Ubon Ratchathani฿2.0M
  3. 3Bangkok Detective Co., Ltd.Bangkok฿2.0M

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

4
Registered
since 2022
4
Still active
0
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2023peak 2 in 20232025

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

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