Ribi + Blum Ag

What Ribi + Blum Ag does

Ribi + Blum AG is a Swiss structural, civil, and traffic engineering consultancy founded in 1976 and headquartered in Romanshorn, Thurgau. The firm operates three offices — Romanshorn (HQ), Zürich (Leutschenbach), and St. Gallen — and serves clients across German-speaking Switzerland. Its service portfolio is organized into three core divisions: Hochbau (structural engineering for buildings and high-rise construction), Tiefbau (civil infrastructure, foundations, sewerage/utility networks, geotechnical work), and Verkehr (transportation and traffic planning). Adjacent specializations include seismic retrofitting, landscaping, and BIM-led digital planning, with the proprietary BIM2Field workflow enabling paperless construction sites through model-driven formwork and reinforcement planning.

The firm's underlying technology stack is centered on Building Information Modeling rather than AI, with BIM deployed across project phases from planning through execution. Engineering services are delivered on a project-based, fee-for-engagement model — public-sector work flows through competitive tendering under SIA/suisse.ing standards, while private-sector work is secured through direct relationships with developers, general contractors, corporates, and institutional clients. Notable engagements span The Circle at Zürich Airport (CHF 900 million), Stadion Hardturm (CHF 675 million), PostFinance Tower (CHF 80 million), and Spital Linth (CHF 75 million), alongside enterprise clients including DENNER, Coop, V-Zug Kältetechnik, Die Schweizerische Post, Flughafen Zürich AG, and HRS Real Estate.

Ribi + Blum AG is a private Swiss corporation (Aktiengesellschaft) with no public listing, no external funding rounds, and no disclosed subsidiaries. The firm maintains a physical and operational partnership with sister company F. Preisig AG, sharing the Zürich-Leutschenbach building. Go-to-market is anchored in long-cycle referral networks with architects, developers, and construction firms rather than outbound marketing, and pricing is project-quoted, not publicly disclosed.

Name

Ribi + Blum Ag

Legal name

Ribi + Blum AG

Website

https://ribiblum.ch

Company type

Private

Founded year

1976

Operating status

Operating

Short description

Ribi + Blum AG is a Swiss engineering consultancy founded in 1976 providing structural, civil, and traffic engineering planning for building and infrastructure projects across German-speaking Switzerland, serving developers, public agencies, and enterprise clients from offices in Romanshorn, Zürich, and St. Gallen.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413), Engineering Services (54133)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Building Information Modeling (BIM) & Digital Design Services (BPAHAKAK)

akta.pro secondary industry

Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE)

Keywords

• Structural engineering
• Civil engineering
• Traffic planning
• BIM services
• Geotechnical engineering

Headquarters

HQ city

Romanshorn

HQ country

Switzerland

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Engineering Consulting Services: Project-based engineering and planning services including structural engineering, civil engineering, traffic planning, and construction management for various building types and infrastructure projects.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Ribi + Blum AG is a Swiss engineering consultancy providing structural (Hochbau), civil (Tiefbau), and traffic (Verkehr) engineering planning services for building and infrastructure projects. The firm delivers integrated engineering services from project planning through execution, including BIM-enabled digital construction methods, foundation and geotechnical engineering, and specialized offerings such as seismic retrofitting, sewage and utility infrastructure, and landscaping.

Product overview

Ribi + Blum AG is a Swiss civil engineering and construction planning firm offering integrated engineering services under the SIA/suisse.ing standards. The company provides a portfolio of interconnected services organized into three main divisions: Hochbau (structural engineering for buildings), Tiefbau (civil infrastructure engineering), and Verkehr (traffic and transportation planning). These core services are supported by specialized offerings including BIM services for digital construction planning, structural design, excavation and foundation engineering, sewage and utility infrastructure, landscaping, seismic retrofitting, and geotechnical engineering. The company operates across three Swiss locations in Romanshorn, Zürich, and St. Gallen, and serves as part of a total project assignment team (INGE Circle) for major construction projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Hochbau (Structural Engineering) Structural engineering and high-rise construction planning services including project design, tendering, and realization for buildings and complexes.
• Tiefbau (Civil Engineering) Infrastructure and civil engineering services including road construction, harbor facilities, water engineering, and utility networks.
• Verkehr (Traffic Planning) Transportation planning and traffic engineering services including area development, parking facilities, and traffic concept planning.
• BIM Services Building Information Modeling services enabling digital planning methods such as BIM2Field for paperless construction sites and precise formwork and reinforcement planning.
• Tragwerksplanung (Structural Design) Structural design services for various construction types including conventional solid construction, steel construction, and prefabricated elements.
• Baugrube (Excavation and Foundation Engineering) Excavation engineering and foundation planning including pile foundations, micropiles, and foundation pit securing.
• Kanalisation / Werkleitungen (Sewage and Utilities) Sewerage systems and utility infrastructure planning including drainage, supply lines, and network coordination.
• Erdbebenertüchtigung (Seismic Retrofitting) Earthquake safety assessment and seismic retrofitting services for existing structures.
• Geotechnik (Geotechnical Engineering) Geotechnical engineering services including soil analysis, foundation recommendations, and ground improvement.
• Umgebung (Landscaping) Surrounding area development and landscaping services for construction projects.

Quantifiable outcome

• Successfully delivered projects with construction costs ranging from CHF 1.5 million to CHF 900 million
• +1 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• F. Preisig AGcoreStrategic or Co-development Partner · 1 August 2022Sister company sharing the same building at Hagenholzstrasse 83b in Zürich-Leutschenbach. The proximity enables simplified collaboration and synergies between the two engineering firms.

Scale indicators3 records

Recent moves5 records

Expansion highlights3 records

Broad incumbents

• Arcadis Switzerland: Global design, engineering and consultancy firm with Swiss operations across buildings, mobility and infrastructure; overlaps with Ribi + Blum's Hochbau/Tiefbau/Verkehr portfolio and competes on the same flagship Swiss real estate and infrastructure projects.
• WSP Switzerland: Global engineering consultancy with a Swiss practice covering structural, civil, traffic and infrastructure planning; competes for the same large Swiss developer and public-sector mandates and brings significantly more international scale to competitive tenders.
• B+S AG (part of AFRY): Swiss engineering consultancy now part of the global AFRY group, offering structural, civil, traffic and infrastructure engineering across Switzerland; a broader incumbent that competes with Ribi + Blum on large, multi-disciplinary Swiss infrastructure and developer-led projects.

Direct peers

• WaltGalmarini AG: Zürich-based structural and civil engineering firm with strong track record on complex Swiss buildings and infrastructure; comparable on Hochbau focus, BIM-enabled design, and project-based fee model serving Swiss developers and public clients.
• F. Preisig AG: Swiss engineering firm and sister company of Ribi + Blum AG; shares the Zürich-Leutschenbach office at Hagenholzstrasse 83b and offers overlapping civil and structural engineering services to Swiss public and private clients, making it the closest comparable on geography, scale, and service mix.
• EBP Schweiz AG: Swiss engineering and planning firm active in structural, civil, mobility, and infrastructure planning; overlaps directly with Ribi + Blum's structural, geotechnical and traffic planning offerings, and competes for the same cantonal and federal infrastructure mandates.
• Burckhardt+Partner AG: Swiss architecture and general planning firm collaborating with Ribi + Blum on multiple reference projects (e.g., HRS Real Estate partnerships); comparable in serving Swiss commercial, healthcare and infrastructure clients with full planning services, and a potential joint-venture or consortium partner on large mandates.
• Basler & Hofmann AG: One of the largest Swiss engineering consultancies, offering structural, civil, traffic, geotechnical and environmental engineering with BIM capabilities across German-speaking Switzerland; directly comparable on service portfolio, Swiss public-sector focus, and BIM-led project delivery.
• Emch+Berger AG: Swiss engineering consultancy covering structural, civil, traffic and environmental engineering with offices across Switzerland; comparable in full-service Hochbau/Tiefbau/Verkehr positioning and public-sector client base, and a direct competitor on cantonal and developer-led mandates.

Emerging players

• Schlaich Bergermann Partner (sbp): Germany-based structural engineering firm with strong Swiss project exposure (e.g., stadiums, large-span structures); comparable on the structural design / Tragwerksplanung side of Ribi + Blum's portfolio and on BIM-driven complex building design, though with a different (larger, more specialist) footprint.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ribi-blum-ag

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ribi + Blum Ag