Stonehenge Inter
Stonehenge Inter is a publicly listed Thai construction consulting and supervision firm (SET: STI), founded 1992 in Bangkok, providing project management, quality control, and supervision services through a 501-1,000 person professional engineering team for construction projects in the Bangkok Metropolitan Region.
- Company typePublic
- Founded1992
- HeadquartersBangkok, Thailand
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What Stonehenge Inter does
Stonehenge Inter Public Company Limited (บริษัท สโตนเฮ้นจ์ อินเตอร์ จำกัด (มหาชน)) is a Thai publicly listed construction services firm, founded in 1992 and headquartered at 163 Soi Chok Chai Ruam Mit (Ratchada 19), Ratchadaphisek Road, Din Daeng, Bangkok. The company delivers construction consulting, project management, quality control, and construction supervision services through in-house professional engineering teams, operating under a single, unified services offering rather than a modular product platform. Its geographic footprint is concentrated in the Bangkok Metropolitan Region, with no disclosed international operations, subsidiaries, or M&A activity. The firm is publicly listed on the Stock Exchange of Thailand under ticker STI (bkk:STI) and maintains a mature public-company infrastructure: a board of directors with five sub-committees (Audit, Nomination and Remuneration, Executive, Corporate Governance, Sustainability and Risk Management), full investor relations pages including 56-1 ONE Report, financial statements, analyst coverage, dividend policy, and SET announcements, plus an anti-corruption and whistleblowing channel. Headcount is 501-1,000 employees, and the company has a founder (Somkiat Silawatanawong) with multi-decade tenure.
The business model is professional-services-based: revenue is generated through fee-for-service construction consulting and supervision engagements, with no public pricing disclosure, no named enterprise customers, no disclosed customer-segment breakdown, and no platform or productized offering. The underlying technology is human-labor-intensive engineering oversight rather than proprietary software; the source material lists core technology as "Not specified" and contains no patents, trademarks, AI/ML assets, APIs, or proprietary features. There is no evidence of a digital platform, no mobile app, and no integration ecosystem — the company's competitive proposition rests on the credentials and capacity of its engineering bench and on its long-running public-company credibility in a regulated services market.
Stonehenge Inter firmographics
Firmographics- Name
- Stonehenge Inter
- Legal name
- บริษัท สโตนเฮ้นจ์ อินเตอร์ จำกัด (มหาชน) (Stonehenge Inter Public Company Limited)
- Website
- https://sti.co.th
- Company type
- Public
- Founded year
- 1992
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- Stonehenge Inter is a publicly listed Thai construction consulting and supervision firm (SET: STI), founded 1992 in Bangkok, providing project management, quality control, and supervision services through a 501-1,000 person professional engineering team for construction projects in the Bangkok Metropolitan Region.
- Ownership category
- akta.pro rank
Stonehenge Inter industry classification
Industry- Product category
- Construction Consulting Services
- NAICS
- Architectural, Engineering, and Related Services (5413)
- SIC
- Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)
- akta.pro primary industry
- Construction Management (Agency/Owner’s Rep) (IMAFAAAC)
- akta.pro secondary industries
- Construction Engineering & Constructability Consulting (BPAHAIAN), Construction Program Management (Multi-site/Portfolio) (IMAFAAAF)
Keywords
Where Stonehenge Inter is headquartered
LocationHeadquarters
- HQ city
- Bangkok
- HQ country
- Thailand
- HQ region
- Asia
Offices1 record
Markets served
Stonehenge Inter business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations
Stonehenge Inter product offering
Product offeringCore offering
Stonehenge Inter provides comprehensive construction consulting and supervision services delivered by a team of professional engineers. The offering covers the full construction project lifecycle, including project management, quality control, and on-site construction supervision, primarily for construction project owners and developers in Thailand.
Product overview
Stonehenge Inter (STI) operates as a single, unified construction consulting service rather than a platform with multiple modules. The company provides comprehensive construction consulting and supervision services through professional engineering teams. The core offering encompasses the entire construction consulting lifecycle, including project management, quality control, and construction supervision. The company is listed on the Stock Exchange of Thailand (SET) under ticker STI and maintains investor relations, sustainability reporting, and corporate governance pages on its website.
Differentiator
Problem solved
Functional benefit
Products and services
- Construction Consulting and Supervision Services Full-scope construction consulting and supervision services delivered by a professional engineering team, covering the entire construction project lifecycle including project management, quality control, and on-site supervision. Targeted at construction project owners and developers in Thailand.
Companies that use Stonehenge Inter
Customer profileIdeal customer profiles1 record
Stonehenge Inter technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Stonehenge Inter partnerships and signals
Strategic signalScale indicators1 record
Recent moves5 records
Expansion highlights4 records
Stonehenge Inter competitors and assessment
Company assessmentRegional players
- Meinhardt Group: Meinhardt is an Asia-based engineering consultancy offering construction supervision and project management. It is a regionally comparable counterpart active across Southeast Asian construction markets.
- Surbana Jurong: Surbana Jurong is an Asia-headquartered infrastructure consulting firm with deep regional construction management capability. It is a comparable regional peer for multinational and large Bangkok projects where STI also bids.
Broad incumbents
- Arcadis: Arcadis is a global design and consultancy firm providing project and construction management. Its Bangkok operations and Southeast Asia focus make it a comparable bidder for STI's supervision work.
- AECOM: AECOM is a global infrastructure consulting firm delivering construction management and supervision across Asia, including Thailand. It competes with STI on Bangkok mandates while offering a far broader multidisciplinary portfolio.
- WSP Global: WSP is a global engineering consultancy with construction management and supervision services across Asia Pacific. It competes with STI for institutional and real-estate clients in Thailand's metropolitan development market.
- Mott MacDonald: Mott MacDonald is a global engineering, management, and development consultancy delivering construction supervision. It is a relevant benchmark for STI on complex Bangkok infrastructure programs.
- Jacobs Solutions: Jacobs is a global professional services firm with significant construction management and supervision capabilities, operating across Southeast Asia. It is a direct substitute bidder for STI's owner-rep and supervision mandates.
Others
- AEC (Thailand): AEC appears in STI's website footer alongside the Stonehenge corporate brand, suggesting an affiliated or group-level relationship. Included as a thematically adjacent ecosystem participant rather than a direct competitor.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
Stonehenge Inter social profiles
Digital presenceStonehenge Inter financial estimates
Financial estimateRevenue estimate
Valuation estimate
Stonehenge Inter leadership team
Management profileNumber of profiles
Profiles1 record
Stonehenge Inter funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Stonehenge Inter M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Stonehenge Inter
What does Stonehenge Inter do?
Stonehenge Inter provides comprehensive construction consulting and supervision services delivered by a team of professional engineers. The offering covers the full construction project lifecycle, including project management, quality control, and on-site construction supervision, primarily for construction project owners and developers in Thailand.
Is Stonehenge Inter a public or private company?
Stonehenge Inter is a public company. It is classified as public and is currently operating.
When was Stonehenge Inter founded?
Stonehenge Inter was founded in 1992. It employs 501 to 1,000 people.
Where is Stonehenge Inter based?
Stonehenge Inter is headquartered in Bangkok, Thailand, in the Asia region.
Who are Stonehenge Inter's main competitors?
Regional players on record are Meinhardt Group and Surbana Jurong. Broad incumbents are Arcadis, AECOM, WSP Global, Mott MacDonald and Jacobs Solutions. AEC (Thailand) is listed as an others.
Does Stonehenge Inter have an API?
No public API is recorded for Stonehenge Inter.
What industry is Stonehenge Inter in?
Stonehenge Inter's product category is Construction Consulting Services. Its primary akta.pro industry code is IMAFAAAC, Construction Management (Agency/Owner’s Rep), with a secondary code of BPAHAIAN, Construction Engineering & Constructability Consulting. Its NAICS code is 5413 and its SIC code is 8711.