Caldive

What Caldive does

Caldive Limited is a commercial diving and marine support services company headquartered in Invergordon, Scotland, operating under the website caldive.co.uk. The firm has been providing underwater services for over 30 years and serves four primary verticals: oil and gas, civil engineering, offshore renewables, and shipping and marine plant. Its core offering covers saturation and air diving, Remotely Operated Vehicle (ROV) operations, in-water class inspection surveys, non-destructive testing (NDT) and hyperbaric welding, delivered by a professional diving workforce using a dedicated vessel fleet operated via a related entity (seafastltd.co.uk). The company claims worldwide operational reach alongside its UK base and markets itself to blue-chip clients and main contractors on a 24/7 basis.

Caldive's business model is project-based professional services: contracts are quoted per scope, location and complexity, with revenue tied to individual diving campaigns, inspections and marine support tasks rather than recurring SaaS-style subscriptions. Pricing is not publicly disclosed. The go-to-market is sales-led and enterprise-focused, with customer acquisition driven by direct business development, a long operating track record, and an unusually dense set of industry certifications and pre-qualifications — including ABS, Bureau Veritas, Lloyd's Register, DNV GL, RINA, ADC, ISO 9001 & 45001, Construction Line, Achilles Verify Silver, Builders Profile and Shell approval. Many of these credentials are prerequisites for bidding on enterprise marine and offshore work, and they double as the company's primary barrier to entry.

The firm operates as a UK private limited company with 11–50 employees and no disclosed parent, subsidiaries, funding rounds, M&A activity or leadership changes. The firm's website and supporting certifications are the principal public-facing signals of operating activity; revenue, headcount trajectory and project backlog are not disclosed in the input data.

Name

Caldive

Legal name

Caldive Ltd

Website

https://caldive.co.uk

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

11–50 employees

Short description

Caldive is a UK-based commercial diving and marine support services firm providing saturation diving, ROV, in-water class inspection, NDT and hyperbaric welding to enterprise clients in oil and gas, civil engineering, offshore renewables and shipping worldwide.

Ownership category

akta.pro rank

Product category

Commercial Diving Services

NAICS

Ship Building and Repairing (336611), Support Activities for Water Transportation (4883), Other Support Activities for Water Transportation (48839)

SIC

Ship & Boat Building & Repairing (3730), Oil & Gas Field Services, Nec (1389)

akta.pro primary industry

Underwater Inspection, Maintenance & Repair (UWILD, Diving/ROV, In-water Cleaning) (IMAJAFAJ)

akta.pro secondary industries

Underwater Hull Services (Diving, In-Water Cleaning, Propeller Polishing, Inspection) (TLAHAMAL), Underwater Salvage & Diving Operations (UWILD, Cutting, Welding) (IMAJANAD)

Keywords

• Commercial diving services
• Marine support services
• Underwater inspection services
• Offshore diving contractors
• ROV operations

Headquarters

HQ city

Invergordon

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D

Revenue model

1. Commercial Diving Services: Professional diving and underwater services for various marine and offshore industries including shipping, oil and gas, civil engineering, and renewables. Revenue is generated through project-based contracts, typically involving specific diving operations, inspections, and marine support tasks.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Caldive provides commercial diving and marine support services to the oil and gas, civil engineering, offshore renewables, shipping, and marine plant industries worldwide. Service offerings include underwater inspection, ROV operations, class inspection, hyperbaric welding, and marine support for major contractors and blue-chip clients, delivered through a professional workforce with over 30 years of industry experience and 24/7 availability.

Product overview

Caldive is a diving services company providing a comprehensive range of underwater services primarily for the offshore oil and gas, shipping, and marine industries. The company offers offshore diving services, commercial diving, ROV (Remotely Operated Vehicle) services, survey and inspection capabilities, and hyperbaric welding. These services support construction, maintenance, inspection, and repair operations across the marine and energy sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Shipping Diving Services Commercial diving services for the shipping industry covering hull inspection, propeller/rudder inspections, prop shaft work, and underwater vessel repairs carried out in-water without requiring dry-docking. Targeted at vessel owners, operators, and managers needing class-approved underwater work.
• Oil and Gas Diving Services Commercial diving and underwater support services for offshore oil and gas operations, including underwater construction, inspection, maintenance, and pipeline work for platforms and subsea assets. Serves blue-chip operators and major contractors including Shell-approved engagements.
• Civil Engineering Diving Services Specialist underwater diving services for marine civil engineering projects, including bridge inspection, harbor maintenance, port construction, and inspection of marine structures. Targeted at major civil engineering and marine infrastructure contractors.
• Renewables Diving Services Underwater diving services for offshore renewable energy installations, including offshore wind farm installation support, turbine foundation work, and cable burial operations. Targets offshore wind developers and renewable energy operators.
• Class Inspection Services Marine classification inspection services and in-water surveys conducted to meet international maritime standards set by classification societies (ABS, Bureau Veritas, Lloyd's Register, DNV GL, RINA). Targeted at vessel owners and operators requiring approved in-water survey certification.
• ROV Services Remotely Operated Vehicle (ROV) services for underwater survey, inspection, and intervention operations, complementing diver-based work in challenging marine environments. Used across oil and gas, civil engineering, renewables, and shipping engagements.

Quantifiable outcome

• Outstanding reputation built over 30+ years in commercial diving industry

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Nine partnerships are on record, tiered minor and core.

• RINAminorOthersRINA is a classification society that provides certification services for marine vessels and offshore structures. Caldive holds RINA certification for their diving services.
• American Bureau of Shipping (ABS)minorOthersABS is a global classification society providing classification services for maritime vessels. Caldive is an approved ABS Class Service Supplier.
• Bureau VeritasminorOthersBureau Veritas is a classification and certification society. Caldive holds BV IWS certification for In-Water Survey services.
• Lloyd's RegisterminorOthersLloyd's Register is a maritime classification society providing vessel certification. Caldive holds IWS certification from Lloyd's Register.
• DNV GLminorOthersDNV GL is a classification and certification society. Caldive holds ISO 9001 & 45001 and In-Water Survey certifications from DNV.
• ShellcoreOthersShell is a major international oil and gas company. Caldive has received formal approval as a Shell contractor.
• Construction LineminorOthersConstruction Line is a pre-qualification system for construction suppliers. Caldive holds Construction Line certification.
• Achilles VerifyminorOthersAchilles Verify is a supply chain pre-qualification system for the energy sector. Caldive holds Silver certification.
• Deepwind ClusterminorOthersDeepwind is a Scottish offshore wind industry cluster. Caldive is a member, indicating involvement in the offshore wind sector.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Bourbon Offshore: Global marine services provider with subsea and diving capabilities serving oil & gas clients. Comparable underwater inspection and ROV service lines, though operating at much larger fleet scale.
• Saipem: Global engineering and drilling contractor with offshore EPCI and subsea services. Much larger broad incumbent that overlaps with Caldive on underwater installation and intervention work for major oil & gas operators.
• Subsea7: Global subsea contractor delivering SURF (subsea, umbilicals, risers, flowlines) and IRM services to offshore oil & gas and renewables. Larger broad incumbent in the same underwater engineering space as Caldive.
• Helix Energy Solutions Group: US-listed offshore energy services company providing subsea well intervention, ROV, and marine services globally. Broad incumbent offering overlapping commercial diving and subsea intervention services to oil & gas clients.

Direct peers

• DeepOcean: Subsea services provider offering survey, IMR (inspection, maintenance, repair), and ROV services to offshore oil & gas and renewables. Directly comparable in underwater inspection and intervention services to Caldive's core offering.
• Rever Offshore (formerly Bibby Offshore): UK-based subsea contractor offering commercial diving, ROV, and offshore IRM services to oil & gas and renewables clients. Highly comparable service portfolio and customer base to Caldive, with similar North Sea focus.
• ROVCO: UK-based subsea services company specializing in ROV-based inspection, survey, and asset integrity work for offshore wind and oil & gas. Comparable to Caldive's ROV and survey capabilities, with a strong offshore renewables tilt.

Emerging players

• Ceona (assets acquired by GE Oil & Gas / contractors): Historical deepwater construction player whose subsea and offshore services portfolio overlapped with the diving/ROV IRM market Caldive serves. Listed as adjacent comparable in offshore construction and intervention services.
• Global Marine Group: UK-headquartered subsea cable and offshore services company with ROV and diving-adjacent capabilities for renewables and telecoms. Comparable in geographic focus and offshore wind exposure to Caldive.

Regional players

• Mermaid Maritime: Thailand-based subsea services company offering diving, ROV, and IRM work primarily across Southeast Asia. Comparable service portfolio but different geography, making it a regional rather than direct competitor to Caldive.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

Compliance3 records

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 Caldive