Diamond Marine
Diamond Marine is a family-owned, multi-brand boat dealership in East Haven, CT, operating the largest indoor showroom in the Northeast to sell new and pre-owned boats, motors, trailers, and PWC, supported by service, parts, winter storage, and an international export channel that represents nearly 50% of business.
- Company typePrivate
- Founded1983
- HeadquartersEast Haven, United States
- Headcount11–50
- GTM typeB2C
- OfferingServices
What Diamond Marine does
Diamond Marine is a privately held, family-owned boat dealership founded in 1983 and headquartered at 650 Coe Ave, East Haven, Connecticut, operating from a 40,000 sq. ft. indoor showroom that the company describes as the largest in the Northeast. The business sells new and pre-owned boats from multiple manufacturers (Key West Boats, Carolina Skiff, Steiger Craft, Blackfin, Monterey, Stingray, Donzi), outboard motors (Mercury, Yamaha, Suzuki), Yamaha WaveRunners and Kawasaki personal watercraft, and Venture trailers, alongside a stocked parts department. Supporting services include factory-certified engine service and repair, climate-controlled winter storage, shrink wrapping and winterization, on-site registration, and trade-in, consignment, and "Cash for Boats" purchasing programs. Financing is offered through third-party lenders (AppOne, Trailer Solutions Financial, Yamaha PWC financing partners).
The company runs a direct-to-consumer go-to-market model combining a physical retail showroom with website, social media (Facebook, Instagram, YouTube), and an eBay Superstore channel. Pricing is quote-based across all product lines, with new boats ranging from approximately $28,000 entry-level skiffs to over $200,000 for premium center consoles, and pre-owned vessels from roughly $11,000 to over $234,000. Approximately 50% of business is generated through international sales, with Diamond Marine handling export logistics, documentation, insurance, and shipping arrangements to Europe, Ukraine, and Asia under a one-price quote structure. Customer segments span individual recreational buyers, fishing enthusiasts, pontoon/deck boat buyers, and international purchasers, with horizontal segmentation.
Leadership is concentrated in the Muller family: Karl Muller as President, Kurt Muller as Vice President, and Suzanne Muller as Controller, supported by a sales manager, service manager, yard operations, and admin staff. The company holds no institutional investors, no parent company, no funding rounds, and no M&A activity. The stated competitive advantages are the largest indoor showroom in the Northeast, decades of supplier relationships, nation-leading Steiger Craft dealer status, factory-certified technical capabilities across multiple engine brands, and the international export operation.
Diamond Marine firmographics
Firmographics- Name
- Diamond Marine
- Legal name
- Diamond Marine
- Website
- https://diamondmarine.net
- Company type
- Private
- Founded year
- 1983
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Diamond Marine is a family-owned, multi-brand boat dealership in East Haven, CT, operating the largest indoor showroom in the Northeast to sell new and pre-owned boats, motors, trailers, and PWC, supported by service, parts, winter storage, and an international export channel that represents nearly 50% of business.
- Ownership category
- akta.pro rank
Where Diamond Marine is headquartered
LocationHeadquarters
- HQ city
- East Haven
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Diamond Marine business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Inventory (boat, motor, trailer, PWC purchases from manufacturers), Infrastructure (40, 000 sq. ft. showroom and climate-controlled storage facility), Personnel (sales, factory-certified service technicians, yard operations, finance/admin), Operations (international export logistics, shipping, insurance, documentation), Marketing or Sales (website, social media, eBay store, Google reviews)
Revenue model
- New Boat Sales: Sales of new boats from multiple manufacturers including Key West Boats, Carolina Skiff, Steiger Craft, Blackfin, Monterey, Stingray, and others. The company purchases vessels outright from manufacturers allowing for competitive pricing.
- Pre-Owned Boat Sales: Sales of inspected pre-owned boats. The company accepts quality trade-ins and consignments, thoroughly inspects all pre-owned vessels through a 100-point inspection process.
- Trailer Sales: Sales of boat trailers including Venture trailers. The company is the largest stocking dealer of Venture trailers in the region offering same-day pickup on most models.
- Parts and Accessories: Sales of marine parts and accessories from Mercury, Yamaha, and Suzuki, plus general boating accessories, electronics, and aftermarket additions.
- Service and Repair: Full-service repair department handling outboards, inboards, and I/O engines. Services include rebuilding lower units, motor rebuilding, powerhead replacement, prop reconditioning, and regular maintenance. Factory certified technicians for Yamaha Marine, Mercury, Mercruiser, Suzuki, and Volvo-Penta.
- Winter Storage: Climate-controlled indoor storage services for vessels, plus shrink wrapping, winterization programs, and spring commissioning services.
- International Sales: Nearly 50% of business is with international customers. The company handles vessel export, shipping logistics, and documentation for worldwide delivery.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | New Boats - Price upon quote request |
| One time/ perpetual license | Pay-as-you-go | Pre-Owned Boats - Price upon quote request |
| Unit Pricing | Pay-as-you-go | Service and Parts - Price upon quote request |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels7 records
Diamond Marine product offering
Product offeringCore offering
Diamond Marine is a full-service boat dealership selling new and pre-owned boats, outboard motors, personal watercraft, and trailers from major marine manufacturers, supported by an in-house service department, parts retail, climate-controlled winter storage, financing facilitation, and an international export/shipping program. The core transaction is the sale of recreational boats and marine equipment, with recurring revenue from service, storage, and parts.
Product overview
Diamond Marine operates as a full-service boat dealership with a unified platform of products and services. The core offerings include new and pre-owned boat sales across multiple manufacturers (Carolina Skiff, Key West Boats, Monterey, Blackfin, Steiger Craft, Stingray), outboard motors (Suzuki, Yamaha, Mercury), personal watercraft (Yamaha WaveRunners, Kawasaki), and Venture boat trailers. Supporting services include parts and accessories sales, factory-certified service and repair, winter storage in a 40,000 sq ft indoor facility, international sales and shipping, boat financing, and a cash-for-boats purchase program. The company serves both retail customers and international buyers, with nearly 50% of business coming from international sales.
Differentiator
Problem solved
Functional benefit
Products and services
- New Boat Sales Sales of new boats from multiple manufacturers including Carolina Skiff, Key West Boats, Monterey, Blackfin, Steiger Craft, and Stingray, ranging from 15 to 35 feet for fishing, family cruising, and watersports. Targeted at individual consumers and families purchasing recreational boats.
- Pre-Owned Boat Sales Sales of quality pre-owned vessels that undergo a rigorous 100-point inspection, fluid changes, repairs to spec, cleaning and detailing before sale. Trade-ins and consignments accepted. Targeted at individual consumers and families seeking value-priced recreational boats.
- Personal Watercraft (PWC) Sales of Yamaha WaveRunners and Kawasaki personal watercraft, including models like FX Cruiser HO and Ultra 310X, with horsepower ranging from 200hp to 310hp. Targeted at recreational watercraft buyers.
- Venture Boat Trailers Sales of Venture aluminum and galvanized steel boat trailers, the largest stocking dealer in the region, offering single axle, tandem axle, and triple axle configurations with bunk or roller options for boats 16-36 feet. Same-day pickup on most available models.
- Boat Service and Repair Factory-certified technician service for all makes of outboards, inboards, and I/Os, including engine rebuilding, lower unit rebuilds, motor rebuilding, powerhead replacement, prop reconditioning, and regular maintenance. Certified for Yamaha Marine, Mercury, Mercruiser, Suzuki, and Volvo-Penta.
- Winter Storage Climate-controlled indoor vessel storage in a 40,000 sq. ft. facility, with shrink wrapping services and comprehensive winterization programs for stern drive, inboard, and diesel engines. Also includes spring commissioning services.
- International Sales and Shipping Export sales program accounting for nearly 50% of business, providing one-price quotes that bundle vessel cost, insurance, and shipping logistics with documentation support. Coordinates with shipping agents for worldwide delivery including Europe, Ukraine, and Asia.
- Boat Financing Financing facilitation for boats, trailers, and Yamaha PWC through third-party lender partners including AppOne, Trailer Solutions Financial, and Yamaha PWC financing. Customers apply directly through Diamond Marine's website.
- Cash for Boats Program Diamond Marine purchases boats of all kinds including sports cruisers, powerboats, bowriders, pontoons, and trailers from dealers, private individuals, repossessions, and auctions with quick decisions. Provides a streamlined acquisition channel for inventory.
Quantifiable outcome
- Nearly 50% of business comes from international customers, demonstrating strong global reach and market acceptance.
- +3 more outcomes
Companies that use Diamond Marine
Customer profileNamed customers6 records
Segments5 records
Ideal customer profiles3 records
Diamond Marine technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Diamond Marine partnerships and signals
Strategic signalPartnerships
Twelve partnerships are on record, tiered core and minor.
- Steiger CraftcoreDiamond Marine is the nation's #1 Steiger Craft dealer. Steiger builds Pilot House and Center Console fishing boats from 21 to 31 feet with emphasis on rugged, sea-keeping construction. The relationship is a core distribution partnership for both parties.
- BlackfincoreAuthorized Blackfin boat dealer. Blackfin manufactures high-quality fishing and cruising boats. Diamond Marine is a recognized Blackfin dealer.
- Yamaha MarinecoreAuthorized Yamaha Marine dealer for outboard motors and Yamaha WaveRunners. Factory-certified technicians on staff for Yamaha products. Also offers Yamaha PWC financing through dedicated financing partner.
- Venture TrailerscoreDiamond Marine is the largest stocking dealer of Venture trailers in the region, offering same-day pickup on most available models. Sells aluminum trailers and accepts orders for galvanized steel boat trailers, pontoon trailers, PWC trailers, and skiff trailers.
- Mercury MarinecoreAuthorized Mercury Marine dealer. Factory-certified technicians on staff for Mercury and Mercruiser products.
- Suzuki MarinecoreAuthorized Suzuki Marine dealer. Factory-certified technicians on staff for Suzuki products.
- MontereycoreAuthorized Monterey dealer selling bowriders, sport boats, and luxury cruisers.
- Key West BoatscoreAuthorized Key West Boats dealer. Key West manufactures center console boats, dual console boats, and family sport boats.
- Carolina SkiffcoreAuthorized Carolina Skiff dealer for skiffs and fishing boats.
- Wave ArmorminorAuthorized Wave Armor dealer for floating docks and dock accessories.
- Volvo-PentacoreFactory-certified technicians on staff for Volvo-Penta products. Service provider relationship for repairs and maintenance.
- Stingray BoatsminorAuthorized Stingray Boats dealer.
Scale indicators7 records
Recent moves6 records
Expansion highlights5 records
Diamond Marine competitors and assessment
Company assessmentDirect peers
- MarineMax: The largest recreational boat retailer in the US, operating multi-brand dealerships for new and pre-owned boats across many states. Directly comparable to Diamond Marine in core product offering (multi-brand boat sales), customer base (individual consumers), and supplementary services (parts, service, storage, financing), though at much greater scale and geographic breadth.
- Galati Yacht Sales: Multi-brand boat dealership on the Gulf Coast carrying Viking, Princess, Regulator, and other premium brands, with new/pre-owned sales, service, and brokerage. Closely comparable business model to Diamond Marine with multi-brand premium boat representation, though concentrated in Florida rather than the Northeast.
- Bosun's Marine: Multi-location boat dealership in New England and Florida carrying brands including Boston Whaler, Grady-White, and Sea Ray. Comparable to Diamond Marine in multi-brand premium boat retail and service operations, though operating across more locations.
- Russo Marine: Family-owned New England boat dealer carrying premium brands including Boston Whaler, Grady-White, and Scout. Highly comparable to Diamond Marine in regional footprint (Northeast US), multi-brand strategy, and full-service dealership model with parts and service.
- Atlantic Marine: Northeast boat dealer offering new and pre-owned boats from multiple manufacturers with full service and parts departments. Comparable to Diamond Marine in regional Northeast positioning and multi-brand dealership operations.
- Hylan Yacht Center: Northeast US boat dealership with marina, service, parts, and new/pre-owned sales for brands like Hinckley, Boston Whaler, and Everglades. Comparable to Diamond Marine in regional Northeast positioning, full-service dealership model, and premium brand representation.
Others
- YachtWorld: Global online marketplace for boats and yachts, including dealer inventory listings. Complementary to Diamond Marine's distribution rather than a direct competitor, but increasingly competing for online buyer attention.
- Boat Trader: Online marketplace for buying and selling boats across dealers and private sellers. Not a direct competitor but an alternative channel that competes for boater attention versus Diamond Marine's physical showroom model.
Broad incumbents
- West Marine: National marine retailer specializing in parts, accessories, and supplies for boaters, with a large store footprint. Overlaps with Diamond Marine's parts and accessories business but does not sell new/pre-owned boats at scale and serves as a broader specialty retailer rather than a focused boat dealership.
Emerging players
- Pop Yachts: Online-focused boat broker with national reach selling pre-owned boats directly to consumers. Comparable to Diamond Marine's pre-owned business but operates through a digital-first model without physical showrooms or service operations.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Diamond Marine social profiles
Digital presenceDiamond Marine financial estimates
Financial estimateRevenue estimate
Valuation estimate
Diamond Marine leadership team
Management profileNumber of profiles
Profiles9 records
Diamond Marine funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Diamond Marine M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Diamond Marine
What does Diamond Marine do?
Diamond Marine is a full-service boat dealership selling new and pre-owned boats, outboard motors, personal watercraft, and trailers from major marine manufacturers, supported by an in-house service department, parts retail, climate-controlled winter storage, financing facilitation, and an international export/shipping program. The core transaction is the sale of recreational boats and marine equipment, with recurring revenue from service, storage, and parts.
Is Diamond Marine a public or private company?
Diamond Marine is a private company. It is classified as family owned and is currently operating.
When was Diamond Marine founded?
Diamond Marine was founded in 1983. It employs 11 to 50 people.
Where is Diamond Marine based?
Diamond Marine is headquartered in East Haven, United States, in the North America region.
How does Diamond Marine make money?
Seven revenue lines are on record. New Boat Sales are the primary driver. The others are pre-Owned Boat Sales, trailer Sales, parts and Accessories, service and Repair, winter Storage and international Sales.
Who are Diamond Marine's main competitors?
Direct peers on record are MarineMax, Galati Yacht Sales, Bosun's Marine, Russo Marine, Atlantic Marine and Hylan Yacht Center. Others are YachtWorld and Boat Trader. West Marine is listed as a broad incumbent. Pop Yachts is listed as an emerging player.
Does Diamond Marine have an API?
No public API is recorded for Diamond Marine.