Transsolar

What Transsolar does

Transsolar is a privately held climate engineering firm headquartered in Stuttgart, Germany, founded in 1992 by Thomas Lechner. The firm operates with a headcount in the 101-250 range and positions itself around balancing occupant comfort with minimized environmental impact in built environments — a niche within sustainable building design and building performance consulting. Its value proposition centers on engineering-driven climate comfort solutions that reduce environmental footprint, consistent with a specialist professional services model rather than a product/SaaS model.

The company's underlying technology stack, specific service catalog, pricing structure, customer base, and channel strategy are not disclosed in the available sources. The current transsolar.com web presence provides minimal substantive information (per the structured data extraction, only a verification/loading page is accessible), and no product pages, case studies, certifications, patents, integrations, or API offerings are catalogued. There is no evidence of funding rounds, subsidiaries, parent companies, M&A activity, leadership changes, or strategic partnerships in the input — the only adjacent news artifact (Santander Tower in Miami) is flagged as unrelated to Transsolar.

Given the absence of disclosed revenue, pricing, customer, or business model data, the business mechanics cannot be characterized beyond the headline description: Transsolar appears to monetize its deep climate engineering expertise through project-based consulting engagements typical of German engineering consultancies, but the contract structures, segment mix (public vs. private developer, commercial vs. institutional), repeat-customer dynamics, and GTM channels are not verifiable from the provided sources.

Name

Transsolar

Website

https://transsolar.com

Company type

Private

Founded year

1992

Headcount range

101–250 employees

Short description

Transsolar is a privately held, Stuttgart-based climate engineering consultancy founded in 1992 by Thomas Lechner that delivers occupant-comfort building solutions designed to minimize environmental impact for sustainable construction projects.

Ownership category

akta.pro rank

Product category

Climate Engineering and Building Performance Consulting

NAICS

Environmental Consulting Services (541620)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

TES Systems Integration, Controls & Optimization (TES EMS, Controls, Dispatch) (EUAFANAK)

akta.pro secondary industries

Insulation & Air/Vapor Barrier Systems (Thermal, Acoustic, WRB/AVB) (IMAFAMAD), Chillers, Boilers & Central Plant Operations (BPABACAG), Carbon Neutrality/Claims Strategy & Communications (claims substantiation, greenwashing risk) (EUABAKAK)

Keywords

• Climate engineering services
• Building energy consulting
• Sustainable HVAC design
• Building performance optimization
• Energy efficiency consulting

Headquarters

HQ city

Stuttgart

HQ country

Germany

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Core offering

Transsolar is a climate engineering firm that provides consulting and engineering services aimed at ensuring indoor environmental comfort with the lowest impact on the environment. The firm works on climate-responsive building design, HVAC concepts, and energy performance optimization for construction and real-estate projects.

Product overview

No product or service information available in the provided source data. The source content consists of a news article about a construction project (Santander Tower in Miami) and a loading/verification placeholder page from transsolar.com that does not contain substantive company information.

Differentiator

Problem solved

Functional benefit

Products and services

• Climate engineering consulting

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves3 records

Expansion highlights1 record

Direct peers

• Atelier Ten: Specialist environmental design consultancy focused on building performance, energy, and climate engineering for high-profile architecture – the closest direct peer to Transsolar's climate engineering positioning across both Europe and the US.
• Introba (formerly Integral Group): Building performance engineering and sustainable design consultancy with strong MEP and climate-focused practices; a direct peer in advancing net-zero building outcomes through engineering consulting.
• ME Engineers: MEP and sustainable design engineering firm focused on high-performance buildings; directly comparable climate/energy engineering peer serving demanding architectural clients.
• Morrison Hershfield: Engineering consultancy with a notable building performance, envelope, and energy services group overlapping Transsolar's thermal performance and energy consulting work.

Broad incumbents

• Arup: Global engineering and design firm with substantial building energy, sustainability, and climate consulting practices; broad incumbent competing for the same high-performance building mandates.
• Buro Happold: Global engineering consultancy with deep sustainability, MEP, and building performance practices; competes with Transsolar on premium climate-sensitive projects while offering much broader services.
• Drees & Sommer: Major German real estate and infrastructure consultancy with strong sustainable building and energy efficiency practices; a directly comparable German competitor addressing the same client base as Transsolar.

Regional players

• Werner Sobek: Stuttgart-based structural and façade engineering firm with strong sustainability credentials; a same-city peer working with overlapping architectural clients on high-performance building projects.
• Atelier Dreiseitl (now part of Ramboll): Originally a German landscape and water-sensitive design firm with climate-conscious engineering DNA, now within Ramboll; thematically comparable low-impact built-environment peer.

Others

• Atelier Dreiseitl / Ramboll Studio Dreiseitl: Listed again as ecosystem comparator for sustainability-driven German engineering firms that have been absorbed into larger groups, illustrating a possible trajectory for specialist consultancies.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/TRANScloud

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 Transsolar