Clewer

What Clewer does

Clewer is a privately held Estonian engineering company headquartered in Tallinn, founded in 2010. The firm develops and commercializes patented rotating bed biofilm reactor (RBBR) systems alongside small-scale treatment units aimed at the decentralized wastewater treatment market — sites where connection to centralized municipal sewerage is impractical or uneconomic, such as small communities, remote developments, commercial properties, and light-industrial facilities. The RBBR product line uses a rotating biological carrier media to support biofilm growth, enabling biological degradation of organic pollutants within a compact footprint relative to conventional activated-sludge systems.

The company's technology positioning centers on the proprietary reactor design (explicitly patented in its product descriptor) and on scaling down the treatment chain into prefabricated, deployable units. This places Clewer in a structurally different segment from large municipal EPC contractors: it competes on modularity, decentralized applicability, and lifecycle operating cost rather than throughput scale. The firm operates with 11–50 employees, suggesting a small specialist engineering and manufacturing organization rather than a large-scale infrastructure player.

Business model visibility is thin. The aggregated input contains no disclosed pricing, no customer references, no distribution or channel detail, no partnerships, no funding rounds, no leadership roster, and no revenue figures. The firm's own website (clewer.com) renders only a loader/verification page in the scraped snapshot, blocking first-party corroboration. On the available evidence, Clewer appears to operate as a project-based equipment supplier generating revenue from unit sales, installation, and potentially lifecycle service contracts, but the absence of explicit commercial signals prevents any further triangulation of its revenue mechanics or customer mix.

Name

Clewer

Website

https://clewer.com

Company type

Private

Founded year

2010

Headcount range

11–50 employees

Short description

Clewer is a Tallinn, Estonia-based private company, founded in 2010, that develops patented rotating bed biofilm reactor systems and small-scale units for decentralized wastewater treatment, employing 11–50 staff.

Ownership category

akta.pro rank

Product category

Wastewater Treatment Equipment

NAICS

Sewage Treatment Facilities (221320), Sewage Treatment Facilities (22132)

SIC

Electric, Gas & Sanitary Services (4900), Sanitary Services (4950)

akta.pro primary industry

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ)

akta.pro secondary industries

Decentralized/Package Wastewater Systems (Small/Remote) (EUANADAE), Advanced/Nutrient Removal (BNR/ENR: N, P) (EUANADAC)

Keywords

• Decentralized wastewater treatment
• Rotating biofilm reactor
• Biological wastewater systems
• Small-scale water treatment
• Municipal wastewater equipment

Headquarters

HQ city

Tallinn

HQ country

Estonia

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Core offering

Clewer develops and supplies patented rotating bed biofilm reactor systems and small-scale units engineered for decentralized wastewater treatment. The company's products enable biological treatment of wastewater at sites without access to centralized sewer infrastructure, serving municipalities, small communities, and industrial or commercial facilities requiring on-site treatment capacity.

Differentiator

Problem solved

Functional benefit

Products and services

• Rotating Bed Biofilm Reactor (RBBR) Systems

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Broad incumbents

• Xylem: Xylem is a major water technology vendor with wastewater treatment products including biofilm-based systems (e.g., Sanitaire, Leopold) and a strong municipal footprint. It competes for the same plant-upgrade and decentralized treatment contracts.
• Veolia Water Technologies: Veolia is the largest global water and wastewater treatment group, supplying both municipal and industrial plants including biofilm-based processes. It is a clear incumbent reference for any decentralized wastewater player and the most likely competitor and potential acquirer of Clewer.
• SUEZ Water Technologies & Solutions: SUEZ designs and operates municipal and industrial water treatment plants, including biofilm/MBBR technologies for biological treatment. It directly overlaps with Clewer's RBBR offering at the equipment and process design level.
• Huber Technology (Veolia): Huber supplies equipment for mechanical and biological wastewater treatment, including biofilm carriers and rotating systems. It competes for the equipment slot within municipal plants that Clewer's RBBR targets.

Direct peers

• Fluence Corporation: Fluence specializes in decentralized, packaged and modular wastewater treatment plants using MBBR/MBR technologies. It targets the same small-to-medium municipal and industrial customers that Clewer addresses with its small-scale RBBR units.
• BioMicrobics: BioMicrobics designs decentralized and residential wastewater treatment systems, including biofilm-based processes. It serves the same small-flow, off-sewer segment that Clewer targets.
• Organica Water: Organica provides biological wastewater treatment systems using fixed-film/biomass processes for municipal and decentralized applications. Its activated sludge alternative with biofilm carriers maps closely onto Clewer's rotating bed biofilm reactor concept and customer base.
• Premier Tech Water & Environment: Premier Tech provides decentralized wastewater treatment solutions for residential, commercial and small municipal markets. It is a direct competitor in the package/decentralized segment.
• Clearford Water Systems: Clearford delivers small-footprint, decentralized wastewater collection and treatment systems for small communities and remote developments. It pursues the same off-grid or under-sewered customer base as Clewer.

Emerging players

• Salsnes Filter: Salsnes Filter produces rotating belt filters used as primary treatment and screening upstream of biological reactors in small and municipal plants. It competes for the mechanical pre-treatment slot in the same small-plant workflows.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat2 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/firstlinkgroup

Revenue estimate

Valuation estimate

Number of profiles

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 Clewer