Focused on one thing. Built to do it right.
Mainstay designs and delivers underwater cleaning systems for two critical industries: aquaculture and maritime. We are a hardware-driven engineering company, developing robust, purpose-built equipment supported by integrated digital solutions.
Deep industry understanding
Practical engineering
Long-term operational reliability
Engineered solutions for demanding environments
Maritime
Efficient in-water hull-cleaning systems that support fuel optimization, emissions control, and vessel performance.
Aquaculture
Advanced net-cleaning systems designed to maintain fish welfare, water circulation, and operational stability.
Mainstay Eye
Integrated digital platform connecting equipment, crews, and operational data — providing transparency and remote support across sites and fleets.
Our Journey
From a focused engineering startup to a globally operating underwater cleaning company, Mainstay’s growth has been driven by practical innovation and long-term industry partnerships.
T-Series. First Generation Manual Net Cleaner
Mainstay entered the aquaculture sector with its first manual net-cleaning system. The T-Series established the technological foundation for future remotely operated cleaning solutions.
T-Series. First Generation Manual Net Cleaner
Mainstay entered the aquaculture sector with its first manual net-cleaning system. The T-Series established the technological foundation for future remotely operated cleaning solutions.
R-Series. First Remote Operated Net Cleaner
Mainstay introduced its first remotely operated net-cleaning system, transitioning from manual operation to safer and more efficient remote-controlled cleaning.
R-Series. First Remote Operated Net Cleaner
Mainstay introduced its first remotely operated net-cleaning system, transitioning from manual operation to safer and more efficient remote-controlled cleaning.
R-Series (Second Generation). Advanced Remote Net Cleaner
The second generation R-Series improved durability, stability, and cleaning performance, enabling reliable operation in demanding commercial aquaculture environments.
R-Series (Second Generation). Advanced Remote Net Cleaner
The second generation R-Series improved durability, stability, and cleaning performance, enabling reliable operation in demanding commercial aquaculture environments.
Manta — ROV Net Cleaning Platform.
Manta introduced a fully ROV-based cleaning platform with increased maneuverability inside cage structures, designed for scalable and professional net maintenance operations.
Manta — ROV Net Cleaning Platform.
Manta introduced a fully ROV-based cleaning platform with increased maneuverability inside cage structures, designed for scalable and professional net maintenance operations.
Optimizer. ROV Hull Cleaning System
With Optimizer, Mainstay expanded into the maritime sector, introducing a hull-cleaning system designed for proactive maintenance, coating protection, and improved vessel efficiency.
Optimizer. ROV Hull Cleaning System
With Optimizer, Mainstay expanded into the maritime sector, introducing a hull-cleaning system designed for proactive maintenance, coating protection, and improved vessel efficiency.
Mainstay Eye. Digital Inspection & Reporting Platform
Mainstay Eye connects equipment, inspections, and operational data through AI-supported reporting and automated documentation, enabling improved transparency and compliance.
Mainstay Eye. Digital Inspection & Reporting Platform
Mainstay Eye connects equipment, inspections, and operational data through AI-supported reporting and automated documentation, enabling improved transparency and compliance.
Engineering performance below the surface
With systems deployed worldwide, Mainstay continues to develop integrated cleaning and digital solutions for aquaculture and maritime operations.
Proven through experience
750+
solutions delivered
20+
countries served
100+
active customers
Mainstay is led by a multidisciplinary team of engineers, operational specialists, and industry experts with deep knowledge of underwater cleaning technologies.
Thore Standal
CEO
Dag Tore Steen
CFO
Bent Botten
CSO
Eric Sebastian Ramm
CSO
Proven operational efficiency
Proven operational efficiency
Robust, purpose-built equipment
Robust, purpose-built equipment
Dedicated service teams
Dedicated service teams
Global aquaculture expertise
Global aquaculture expertise
Sustainable maritime operations
Sustainable maritime operations
Trusted by industry leaders
Trusted by industry leaders
Proven operational efficiency
Proven operational efficiency
Robust, purpose-built equipment
Robust, purpose-built equipment
Dedicated service teams
Dedicated service teams
Global aquaculture expertise
Global aquaculture expertise
Sustainable maritime operations
Sustainable maritime operations
Trusted by industry leaders
Trusted by industry leaders
Global Presence
With locations spanning from the fjords of Norway to the coasts of Chile, Mainstay delivers local expertise and support to maritime and aquaculture operations worldwide.
Norway
Mainstay AS, Kjorbokollen 30, 1337 Sandvika, Norway
Contact us
post@mainstay.com
Phone number
+47 32 15 75 75
Offices
Norway
Mainstay AS
Kjorbokollen 30, 1337 Sandvika, Norway
Scotland
Mainstay Scotland Ltd.
Unit 3, Glenshellach Business Park, Oban PA34 4RY, Scotland
Chile
Mainstay Chile S.A.
Calle Paipote 1987, Galpon 2, Villa Artesania, Puerto Montt, Chile
Navigation
Offices
Norway
Mainstay AS
Kjorbokollen 30, 1337 Sandvika, Norway
Scotland
Mainstay Scotland Ltd.
Unit 3, Glenshellach Business Park, Oban PA34 4RY, Scotland
Chile
Mainstay Chile S.A.
Calle Paipote 1987, Galpon 2, Villa Artesania, Puerto Montt, Chile
© Mainstay. All rights reserved
Navigation
Contact us
post@mainstay.com
Phone number
+47 32 15 75 75
Offices
Norway
Mainstay AS
Kjorbokollen 30, 1337 Sandvika, Norway
Scotland
Mainstay Scotland Ltd.
Unit 3, Glenshellach Business Park, Oban PA34 4RY, Scotland
Chile
Mainstay Chile S.A.
Calle Paipote 1987, Galpon 2, Villa Artesania, Puerto Montt, Chile