What Calluna does

Calluna AB is a Swedish environmental consulting firm founded in 1992, headquartered in Linköping, providing expert advisory services in ecology, biodiversity, and sustainable land and water management. The firm serves municipalities, county administrative boards (länsstyrelser), property developers, energy companies (wind, solar, hydropower), infrastructure operators, and natural resource industries across Sweden through a vertically-segmented go-to-market approach. Core services span the full project lifecycle — from baseline inventories (Naturvärdesinventering under Swedac accreditation #1959 and SIS standard SS 199000:2023), species protection investigations, and GIS-based landscape ecological analyses, through environmental impact assessments and permit support, to restoration planning, management plans, and CSRD sustainability reporting. The firm employs approximately 110 environmental consultants across eight Swedish offices and operates Linköpings Naturcentrum on behalf of Linköpings municipality since 1999.

The firm's technical platform combines GIS analyses, a proprietary ROV (Remotely Operated Vehicle) underwater drone for water surveys, and proprietary ecological modeling tools including PREBAT (bat movement prediction, co-developed with Trafikverket and SLU's CBM) and HNAT (Habitat Network Analysis Tool, co-developed with Chalmers under Formas funding). Calluna was one of the initiators of the Swedish SIS standard for NVI methodology and has performed approximately 1,000 NVI assignments over the past decade, accumulating roughly 15,000 hours of nature value inventory work in 2025 alone. The firm also coordinates the EcoComp development project (Vinnova-funded) for ecological value trading and partnered with Almi Invest GreenTech in 2025 to develop the Green Impact Framework for valuing environmental benefits in investments.

Calluna operates on a project-based professional services revenue model with quote-based pricing under ABK09 terms and multi-year contract cadences. Revenue was reported at 120 MSEK in 2025. The firm operates as a sales-led, direct-consulting model targeting enterprise and government clients through public procurement and direct outreach. In February 2026, Calluna joined Myllium, an international enterprise group comprising seven specialized environmental firms with over 400 experts across Sweden, the UK, and the Netherlands, while continuing to operate under its own brand.

Name

Calluna

Legal name

Calluna AB

Website

https://calluna.se

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

101–250 employees

Short description

Calluna AB is a Swedish environmental consulting firm founded in 1992, employing ~110 ecological specialists across eight offices to deliver biodiversity, environmental impact assessment, and nature value inventory services to municipalities, energy companies, and infrastructure developers in Sweden.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (54162), Other Scientific and Technical Consulting Services (54169)

SIC

Services-Commercial Physical & Biological Research (8731), Services-Management Consulting Services (8742)

akta.pro primary industry

Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory (EUAMANAB)

akta.pro secondary industry

Community Forestry & Indigenous Land Stewardship Services (IMAMAJAM)

Keywords

• Environmental consulting services
• Biodiversity assessments
• Nature value inventories
• Ecological restoration services
• Sustainability reporting consulting

Headquarters

HQ city

Linköping

HQ country

Sweden

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Environmental Consulting Services: Professional consulting services provided to clients including municipalities, county administrative boards, property companies, energy companies, and infrastructure companies. Services include environmental impact assessments, species protection investigations, nature value inventories, water surveys, restoration planning, sustainability reporting, and strategic advisory services.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Calluna is a Swedish environmental consulting firm providing expert services in ecology, biodiversity, and sustainable land and water management. Their work spans nature value inventories (NVI), species protection investigations, GIS-based landscape analyses, water surveys (including proprietary ROV underwater drone technology), environmental impact assessments (MKB), ecological restoration planning, and CSRD sustainability reporting. Services cover the full project lifecycle for clients in energy, infrastructure, urban planning, and natural resources.

Product overview

Calluna is an environmental consulting company offering expert services in ecology, biodiversity, and sustainable land and water management. The core offerings include specialized services across the entire project lifecycle: from understanding and mapping (Naturvärdesinventering/NVI, Artinventering, GIS-analyser, Vattenundersökningar) through analysis (Ekosystemtjänstanalys, Miljögiftsutredningar, Miljöövervakning) and planning (Artskyddsutredning, Miljöbedömning och MKB, Naturvårdsprogram, Tillståndsprocess) to implementation (Restaurering, Skötselplaner) and ongoing management (Förvalta). Additional services include Hållbarhetsrådgivning, Hållbarhetsrapportering enligt CSRD, and Dubbel väsentlighetsanalys for sustainability reporting. The company also operates Linköpings Naturskola and coordinates the EcoComp development project. Services span across sectors including energy (wind, solar, hydropower), infrastructure, community planning, and natural resources. Calluna is accredited by Swedac for NVI according to SS 199000:2023.

Differentiator

Problem solved

Functional benefit

Products and services

• Naturvärdesinventering (NVI)

Quantifiable outcome

• Created nature plans for 19 golf clubs covering over 1,500 hectares
• +3 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Almi Invest GreenTechcoreStrategic or Co-development Partner · 25 November 2025Calluna collaborated with Almi Invest GreenTech to develop the Green Impact Framework - a new method for assessing and valuing environmental benefits in early-stage investments. The framework translates scientific knowledge from Paris Agreement, IPCC, IPBES, and Kunming-Montreal Framework into practical tools for evaluating ecological sustainability in investments.
• Chalmers Tekniska HögskolacoreStrategic or Co-development PartnerCollaboration on Formas-funded project to develop HNAT (Habitat Network Analysis Tool), a more general tool than PREBAT that can model various species and habitats. Analysis runs in free software program.
• Naturbruksförvaltningen i Västra GötalandsregionenminorStrategic or Co-development PartnerCollaborated on Interreg project Green Valleys studying harvest strategies for ley cultivation to increase flowering and insect visits. Study conducted at Naturbruksskolan Sötåsen.
• Linköpings kommuncoreStrategic or Co-development PartnerCalluna operates Linköpings Naturcentrum on behalf of Linköpings municipality since 1999. The center includes the Regional Genebank for Red-listed Plants in Östergötland - the only one of its kind in Sweden.
• TrafikverketcoreStrategic or Co-development PartnerCollaborated on developing PREBAT (bat activity prediction model) with CBM at SLU and Trafikverket. Also compiled knowledge on safe wildlife passages over and under roads and railways for various species.
• Myllium Group (international)coreStrategic or Co-development PartnerCalluna is founding member of Myllium - international company group bringing together niche expert companies in nature, climate, and sustainable society development. Members include: Ecogain, EnviroPlanning, Örnborg Kyrkander (Sweden), Tyler Grange, The Ecology Co-op (UK), and Altenburg & Wymenga (Netherlands). Total over 400 experts across 7 companies.
• Aktuell HållbarhetminorGTM or Marketing PartnerTraining partnership for sustainability and environmental courses. Several courses held in collaboration with Aktuell Hållbarhet.
• SIFUminorGTM or Marketing PartnerTraining partnership for sustainability and environmental education courses, conducted in collaboration with SIFU.

Scale indicators8 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Ecogain: Swedish sustainability and biodiversity consultancy; sister company within the Myllium group alongside Calluna. Both firms serve Swedish municipalities, energy companies and infrastructure developers with overlapping nature-value inventory, EIA, and CSRD-related services.
• EnviroPlanning: Swedish environmental planning consultancy and founding Myllium member. Provides EIA, permitting, and environmental advisory to Swedish infrastructure, energy, and municipal clients — closely overlapping with Calluna's service portfolio and customer set.
• Tyler Grange: UK ecology and environmental planning consultancy and Myllium group founding member. Provides ecology, NVI-equivalent, and EIA services to UK infrastructure, property, and energy developers — the closest international peer to Calluna within the same group.
• Altenburg & Wymenga: Dutch ecological research and consultancy firm and Myllium group founding member. Delivers fauna/vegetation inventories, nature assessments, and ecological advisory comparable to Calluna's NVI and species inventory services in the Netherlands market.
• The Ecology Co-op: UK-based ecological consultancy and Myllium group member offering species surveys, ecological impact assessment, and biodiversity advisory — comparable service mix and client profile to Calluna but serving UK infrastructure and developer clients.

Broad incumbents

• AFRY (formerly ÅF): Major Nordic engineering and design consultancy with environmental and permitting capabilities. Provides EIA and environmental services to infrastructure, industry, and energy clients in Sweden, competing with Calluna for similar mandates.
• WSP (Sweden): Global professional services firm with a large Swedish environment and EIA practice serving infrastructure, transport, and energy clients. Competes with Calluna on Swedish permitting and EIAs, but offers a much broader multidisciplinary portfolio.
• Environmental Resources Management (ERM): World's largest pure-play sustainability and environmental consultancy with significant Nordic and Swedish presence. Competes with Calluna on large-scale EIA and biodiversity mandates but as part of a global portfolio spanning strategy, engineering, and remediation.
• Sweco Sverige: Largest Swedish-headquartered engineering consultancy with environment and ecology teams serving municipalities, infrastructure authorities, and energy projects. Overlaps with Calluna on biodiversity assessments, EIA, and water-environment work but at much greater scale.
• Ramboll (Sweden): International engineering and environmental consultancy with a substantial Swedish practice delivering EIA, biodiversity, and water-environment services to infrastructure and energy clients — a direct broad-spectrum competitor to Calluna.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/calluna-ab
• Instagraminstagram.com/callunakonsult

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

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 Calluna