What Altensis does

Altensis is a privately held Istanbul-based sustainability management company founded in 2008 by Dr. Emre Ilıcalı, operating as Turkey's first firm dedicated to green building and corporate sustainability consulting. The company provides consulting across international green building certification systems including LEED, BREEAM, WELL, EDGE, YES-TR, ENVISION, and Turkey's Green Star scheme, alongside corporate sustainability services covering GRI reporting, carbon management, ESG compliance, and EU CBAM readiness. Its technical stack combines proprietary carbon management software (QuickCarbon) with the exclusive Turkey distribution rights to DesignBuilder energy modeling software, supplemented by professional training programs for LEED, BREEAM, WELL, and energy simulation. Select engagements include the Istanbul Airport terminal (1,300,000 m2, world's largest LEED-certified building at the time), Halkbank Towers (LEED Platinum), Akasya Acıbadem (500,000 m2, BREEAM Excellent), and Istanbul Financial Center projects with a combined $2B portfolio value.

The business operates as a B2B, sales-led professional services firm with project-based engagement to enterprise and institutional clients across real estate development, banking, logistics, hospitality, aviation, manufacturing, and government. Revenue is generated primarily through certification consulting fees, energy efficiency and energy modeling projects, commissioning, carbon management services, software licensing for QuickCarbon, DesignBuilder distribution, and recurring training programs. The company has reported involvement in 70% of LEED, BREEAM, and GreenStar certified projects in Turkey and serves markets in Turkey and Uzbekistan, with limited public disclosure on revenue, headcount composition beyond the 11–50 employee band, ownership structure, or capital base.

Name

Altensis

Legal name

Altensis

Website

https://altensis.com

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

11–50 employees

Short description

Altensis is a privately held Istanbul-based sustainability consultancy, founded in 2008, providing green building certification (LEED, BREEAM, WELL, EDGE), corporate carbon management, and energy modeling services to enterprise clients across Turkey and Uzbekistan.

Ownership category

akta.pro rank

Product category

Sustainability Consulting

NAICS

Environmental Consulting Services (54162), Management, Scientific, and Technical Consulting Services (5416)

akta.pro primary industry

Sustainability & ESG Consulting (BPAHACAK)

akta.pro secondary industries

Sustainability, ESG & Climate Risk Advisory (BPAHAJAH), ESG Governance, Sustainability Reporting & Assurance Advisory (BPAHAFAJ), Audit-Ready Controls, Assurance & Compliance Workflow Tools (CSRD/SEC/ISSB) (EUABAEAG), Benchmarking, Ratings & Stakeholder Reporting Portals (Scorecards, Dashboards) (EUABAEAJ)

Keywords

• Green building certification
• Sustainability consulting
• Energy efficiency services
• Carbon management software
• Building energy modeling

Headquarters

HQ city

Istanbul

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Sustainability Consulting Services: Professional consulting services for green building certification (LEED, BREEAM, WELL, EDGE), corporate sustainability strategy, carbon management, and energy efficiency. Services include certification consulting, energy audits, commissioning, and sustainability training programs.
2. Training Services: Classroom and online training programs for LEED, BREEAM, WELL certifications and building energy modeling using DesignBuilder software

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Altensis is Turkey's first sustainability management company, providing green building certification consulting across international standards (LEED, BREEAM, WELL, EDGE, YES-TR, ENVISION, Green Star), corporate sustainability and carbon management services, energy efficiency consulting, and professional training. The firm also develops and distributes the QuickCarbon carbon management software and serves as the exclusive Turkey distributor of DesignBuilder energy modeling software.

Product overview

Altensis is Turkey's first sustainability management company, offering a comprehensive portfolio of green building and corporate sustainability consulting services. The core offerings include green building certification consulting for international standards (LEED, BREEAM, WELL, EDGE, ENVISION, YES-TR, Green Star) and proprietary software (QuickCarbon for carbon management). The company distributes DesignBuilder energy modeling software as Turkey's authorized distributor and offers professional training programs for all major certification systems. Services span energy efficiency, acoustic consulting, life cycle analysis, product sustainability (EPD/LCA), and alternative energy solutions. The portfolio is structured as a consulting-led service model rather than a unified software platform, with offerings organized around certification consulting, energy management, carbon management, and professional education.

Differentiator

Problem solved

Functional benefit

Products and services

• Green Building Certification Consulting End-to-end consulting and engineering services for real estate developers, corporations, and government institutions pursuing internationally recognized green building certifications (LEED, BREEAM, WELL, EDGE, YES-TR, ENVISION, Green Star) for new construction, existing buildings, and infrastructure projects.
• Energy Efficiency Services Building energy efficiency consulting including energy audits, Verified Energy Performance analysis, commissioning of building systems, energy modeling/simulation, and Turkish Energy Identity Certificate (EKB) issuance for regulatory compliance.
• Corporate Sustainability Consulting Strategic sustainability advisory for large corporations including sustainability strategy development, performance and indicator management, GRI sustainability reporting, and corporate policy advisory.
• Carbon Management Services Carbon footprint measurement, carbon reporting, and reduction strategy services for organizations, addressing emerging regulatory requirements such as the EU Carbon Border Adjustment Mechanism (CBAM).
• QuickCarbon Software Altensis-developed proprietary software for measuring and reporting corporate carbon footprints, used in the firm's carbon management service engagements.
• DesignBuilder Software Distribution Distribution, training, and technical support for DesignBuilder building energy simulation software in Turkey, as the exclusive Turkey distributor of the UK-based DesignBuilder tool.
• Building Life Cycle Analysis Life cycle analysis services assessing environmental impacts of buildings throughout their full lifecycle, from material extraction to end-of-life.
• Product Sustainability Services Environmental Product Declaration (EPD) preparation, Life Cycle Assessment (LCA) studies, product carbon footprint calculation, and product self-declaration services for manufacturers and product companies.
• Acoustic Consulting Acoustic consulting for buildings covering interior room acoustics, sound insulation, noise and vibration control, and audio-visual system integration.
• Alternative Energy Consulting Renewable and alternative energy consulting including feasibility studies and project management for renewable energy installations.
• Sustainability Training Programs Classroom and online professional training courses covering LEED, BREEAM, and WELL certifications, DesignBuilder building energy modeling, and ISO 14044-based Life Cycle Assessment, with exam preparation support.

Quantifiable outcome

• 70% market share of certified green building projects in Turkey
• +4 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• DesignBuilder Software (UK)coreTechnology or IntegrationAltensis is the exclusive Turkey distributor of DesignBuilder software, a leading building energy modeling tool. They provide training courses for DesignBuilder users in Turkey, offering both classroom and online training programs for building energy simulation and performance analysis.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• South Pole: Global climate consultancy offering carbon accounting, climate strategy, and sustainability advisory — directly comparable to Altensis's corporate sustainability and carbon management services for enterprise clients.
• Drees & Sommer: German-headquartered engineering and consultancy with a leading green building certification and sustainability practice (LEED, BREEAM, DGNB). Directly comparable to Altensis in service mix, project size, and Europe-MEA project delivery.
• Atelier Ten (Introba): Specialist green building and sustainability consultancy providing LEED, BREEAM, and WELL consulting, energy modeling, and commissioning — closely overlapping Altensis's core service portfolio for high-performance buildings.
• EcoAct: Carbon and climate consulting firm (now an Accenture company) providing carbon footprint measurement, ESG reporting, and net-zero strategy — closely aligned with Altensis's QuickCarbon-enabled carbon management offering.

Broad incumbents

• Arup: Global engineering and consulting firm with a well-established sustainability, green building, and low-carbon design practice. Competes with Altensis on landmark building and infrastructure projects internationally.
• Arcadis: Global design and consultancy firm offering sustainability strategy, climate advisory, and green building services. Comparable to Altensis in serving large real estate and infrastructure clients across multiple regions.
• WSP: Global professional services firm with a deep sustainability, ESG, and green buildings advisory practice, increasingly active in Turkey and Central Asia — competing for the same enterprise and real estate developer clients.
• Bureau Veritas: Global testing, inspection, and certification company with a building and infrastructure sustainability practice, including green building verification — overlapping with Altensis's certification advisory and audit-related work.
• Ramboll: Global engineering, design, and sustainability consultancy with extensive green building, ESG advisory, and carbon management practices. Competes with Altensis on large Turkish and regional enterprise sustainability mandates.

Emerging players

• Integrated Environmental Solutions (IES): Energy modeling and building performance simulation software firm whose IESVE platform competes directly with DesignBuilder — the product Altensis distributes in Turkey — making IES a technology-side peer with overlapping customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/altensis
• Facebookfacebook.com/altensis

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 Altensis