What Hlh Proto Ltd does

HLH Proto Ltd is a Changsha, Hunan, China-based rapid prototyping and low-volume manufacturing service provider founded in 2008. The company operates a multi-technology digital manufacturing platform that combines five additive manufacturing methods—Stereolithography (SLA), Selective Laser Sintering (SLS), Fused Deposition Modeling (FDM), Direct Metal Laser Sintering (DMLS), and HP Multi Jet Fusion (MJF)—with subtractive and conventional manufacturing capabilities including CNC milling and turning, sheet metal fabrication, vacuum casting, rapid injection molding (up to 100,000 units via bridge tooling), overmolding, insert molding, and pressure die casting for aluminum, zinc, and magnesium parts. Production capacity exceeds 100 3D printers and 50 high-precision CNC machines, with tolerances reaching ±0.002 inches for CNC milling and ±0.5% (lower limit ±0.15 mm) for DMLS metal parts.

The business operates a direct sales model with a self-serve online quoting platform accepting standard CAD formats (STP, STEP, IGS, IGES), enabling 24/7 file upload and quote generation. Customers include enterprise, mid-market, and SMB buyers across 50 countries, with a cumulative base of 3,000+ companies. HLH markets across eight verticals: Aerospace & UAV, Automotive, Communications, Consumer Products, Industrial, Medical, Product Development, and Robotics & Automation. Revenue is generated through per-project and per-unit transaction fees across prototyping, low-volume production, and export tooling services. The company holds ISO9001, ISO14001, and IATF16949 certifications, with application engineers averaging 10+ years of experience supporting process selection. Lead times range from 24 hours (rush) to 6 business days depending on technology, with SLA at 3-4 days and SLS at 2-3 business days as standard references.

The company is privately held with no disclosed funding rounds, institutional investors, or public shareholdings. Ownership appears independent, with the website referencing affiliated entities (HLH Prototypes Ltd in Hunan; HLH, Inc. in the privacy policy). No leadership team, M&A activity, or restructuring events are disclosed in the available source material. Marketing is content-driven, relying on blog articles, downloadable whitepapers (e.g., Low Volume Manufacturing Whitepaper), case studies, video content, design guides, and a virtual factory tour to drive organic acquisition.

Name

Hlh Proto Ltd

Legal name

HLH Proto Ltd

Website

https://hlhproto.com

Company type

Private

Founded year

2008

Operating status

Operating

Short description

HLH Proto Ltd is a Changsha, China-based rapid prototyping and low-volume manufacturing service provider offering 3D printing (SLA, SLS, FDM, DMLS, MJF), CNC machining, injection molding, vacuum casting, sheet metal fabrication, and die casting for 3,000+ companies across 50 countries.

Ownership category

akta.pro rank

Product category

Rapid Prototyping & Low-Volume Manufacturing Services

NAICS

Support Activities for Printing (32312)

SIC

Misc Industrial & Commercial Machinery & Equipment (3590)

akta.pro primary industry

Large-Format 3D Printing & Tooling Services (BAAM/LSAM, molds, patterns, jigs/fixtures) (IMAAADAE)

akta.pro secondary industries

Engineering Prototype Builds (Form/Fit/Function) (IMAAAFAB), Functional Testing Prototypes (Mechanical/Thermal/Fluidic) (IMAAAFAG)

Keywords

• Rapid prototyping services
• 3D printing services
• CNC machining services
• Low-volume manufacturing
• Injection molding services

Headquarters

HQ city

Changsha

HQ country

China

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Rapid Prototyping Services: One-stop rapid prototyping manufacturing services including 3D printing, CNC machining, vacuum casting, sheet metal fabrication. Pricing based on part complexity, material, quantity, and surface finishing requirements. Quote-based pricing model.
2. Low-Volume Production Manufacturing: Low-volume manufacturing for production runs typically limited to 100,000 units or less. Services include rapid injection molding, die casting, sheet metal production. Revenue generated per unit or per project depending on order type.
3. Export Tooling: Manufacturing production tools in China for global export. Tools manufactured to specifications then exported to customers' facilities for in-house mass production.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

HLH Proto provides rapid prototyping and low-volume manufacturing services from its facility in Changsha, China. The company operates as a one-stop digital manufacturing platform offering 3D printing (SLA, SLS, FDM, DMLS, MJF), CNC machining (milling and turning), sheet metal fabrication, vacuum casting, rapid injection molding, die casting, and export tooling. Customers upload 3D files through an online quoting system to receive custom parts ranging from single prototypes to production runs up to 100,000 units.

Product overview

Hlh Proto Ltd is a rapid prototyping and low-volume manufacturing service provider operating as a digital manufacturing platform. The company offers a comprehensive portfolio of additive and traditional manufacturing services centered around 3D printing technologies (SLA, SLS, FDM, DMLS, MJF) and subtractive manufacturing (CNC milling and turning, sheet metal fabrication). Additional services include vacuum casting, rapid injection molding, die casting, and export tooling. The platform enables customers to order custom parts from prototype quantities to production volumes up to 100,000 units through an online quoting and ordering system.

Differentiator

Problem solved

Functional benefit

Products and services

• SLA 3D Printing Stereolithography 3D printing service using a UV laser to solidify photosensitive resin layer by layer, producing accurate parts with good surface finish. Production capacity 800 x 800 x 550 mm, tolerances of +/- 0.004 inch or +/- 0.001 inch per inch.
• SLS 3D Printing
• FDM 3D Printing
• DMLS 3D Printing
• MJF 3D Printing
• CNC Milling
• CNC Turning
• Sheet Metal Fabrication
• Vacuum Casting
• Rapid Injection Molding
• Die Casting
• Export Tooling

Quantifiable outcome

• Parts delivered as fast as 24 hours
• +4 more outcomes

Named customers3 records

Segments8 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Scale indicators9 records

Recent moves6 records

Expansion highlights3 records

Direct peers

• Xometry: US-headquartered on-demand manufacturing marketplace offering CNC, 3D printing, injection molding, and sheet metal fabrication through an instant-quote platform. Most directly comparable to HLH on business model and service breadth, though serving customers primarily from a US production network.
• Fictiv: US-based digital manufacturing platform offering CNC machining, 3D printing, injection molding, and urethane casting with an instant-quote interface. Closely comparable to HLH on platform model, technology breadth, and target customer (enterprise hardware developers).
• Sculpteo: France-based online 3D printing service bureau offering SLA, SLS, DMLS, MJF, and color jetting technologies with instant quoting. Comparable digital service bureau model with similar technology breadth, though Europe-focused.
• Shapeways: US/Netherlands-headquartered 3D printing service bureau offering SLS, DMLS, SLA, MJF, and binder jetting through an online platform. Directly comparable digital service bureau model serving a global SMB and prosumer base.
• Protolabs: Largest publicly-traded rapid prototyping and on-demand manufacturing services company offering CNC, injection molding, 3D printing (including metal and polymer), and sheet metal. Closest scaled peer with comparable multi-technology digital quoting platform.
• RapidDirect: China-based rapid prototyping and on-demand manufacturing services company offering CNC machining, injection molding, and 3D printing. Most directly comparable peer given shared China manufacturing base, multi-technology portfolio, and global SMB/enterprise customer focus.
• Hubs (formerly 3D Hubs): Global on-demand manufacturing platform (now under Protolabs) matching customers to a distributed network of CNC and 3D printing service bureaus. Directly comparable digital marketplace model with similar instant-quote customer experience.
• WayKen Rapid Manufacturing: China-based rapid prototyping service company offering CNC machining, 3D printing (SLA, SLS, DMLS), injection molding, and die casting. Directly comparable peer competing in the same online, multi-technology service bureau segment from a Chinese production base.
• Stratasys Direct: Service bureau division of 3D printer OEM Stratasys offering FDM, PolyJet, SLA, SLS, and DMLS printing services. Directly comparable as a multi-technology 3D printing service bureau, with equipment vendor backing as a differentiator HLH lacks.

Emerging players

• Gensun Precision Machining: China-based precision CNC machining and prototyping service provider serving aerospace, automotive, and medical markets. Comparable in target verticals and China production base, though with narrower technology focus on CNC rather than full multi-technology platform.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hlh-proto-ltd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Hlh Proto Ltd