What Silentmaxx does

Silentmaxx (legally silent systems GmbH) is a German privately held manufacturer specializing in silent and fanless personal computing hardware. Founded in October 2000 / incorporated October 2001 and headquartered in Rheinbach with an administrative office in Bonn, the company designs, manufactures, and ships configurable desktop PCs (Mini/Performance/Ultimate), gaming PCs, CAD workstations, servers (tower, mini, rack, file, VM), and quiet notebooks, organized under three sub-brands: KENKO (fully fanless, 0dB passive cooling), AKINO (very quiet operation), and KANWA (quiet notebooks). Core technology comprises proprietary passive/fanless cooling systems — including a 2003/2004 patented fanless ATX power supply, heatpipe-based chassis-integrated convection cooling, a TwinBlock passive CPU cooler with over 1 sqm of cooling surface, HD-Silencer enclosures with four-point vibration suspension, and START-STOP semi-passive power profiles — combined with proprietary in-house enclosure designs produced at the Rheinbach facility. Over 250,000 ST-11 damped cases, 450,000+ damped enclosures, and 400,000+ HD-Silencers have shipped cumulatively.

The business operates on a direct-to-consumer and B2B model almost exclusively through its German e-commerce storefront (silentmaxx.de), supported by a free hotline (0800-9990077), live chat, on-site service, and a PC configurator. Product prices range from roughly €939 for entry Mini PCs to €2,940+ for high-end Threadripper Pro workstations, with extended warranty tiers (2-year standard, optional 3-year pickup/return, on-site service) layered on top. Customer segments span professional/creative workstation buyers (CAD, DTP, 3D modeling), business/enterprise (offices, call centers, server rooms needing quiet), public-sector / education (Universities, Max Planck, Deutscher Bundestag), and home/enthusiast users; named reference customers include KPMG, Commerzbank, Deutsche Telekom, Siemens, Deutsche Bahn, Lufthansa Technik, Fraunhofer, and Henkel. The company is entirely self-financed (100% equity ratio, A+ creditworthiness), founder-owned by Dirk Heising, and reports a cumulative lifetime revenue of over €100M across its German customer base.

Name

Silentmaxx

Legal name

silent systems GmbH

Website

https://silentmaxx.de

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

1–10 employees

Short description

Silentmaxx (silent systems GmbH) is a German manufacturer of silent and fanless desktop PCs, workstations, servers, and notebooks, selling directly via its Rheinbach e-commerce site to German consumers, professionals, and enterprise customers including KPMG, Deutsche Telekom, and Deutsche Bahn.

Ownership category

akta.pro rank

Product category

Silent / Fanless Personal Computing Hardware

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

PC Cases, Chassis & Case Accessories (HDACAGAG)

Keywords

• Silent computers
• Fanless PCs
• Passive CPU cooling
• Noise reduction hardware
• Quiet workstations

Headquarters

HQ city

Rheinbach

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - PCs and Notebooks: One-time hardware sales of custom-configured silent PCs (KENKO, AKINO brands) and notebooks (KANWA brand). Products include Mini PCs, Performance PCs, Gaming PCs, Workstations, and Servers. Customers purchase through configurable e-commerce platform with base prices ranging from ~€939 for entry models to €2,940+ for high-end workstations.
2. Component Sales: Sale of individual silent PC components including fanless power supplies, passive CPU coolers, damped cases, HD-Silencers, and quiet fans. Also includes silma brand damping materials for DIY silent PC builds.
3. Services and Warranties: Optional extended warranties (2-3 years with on-site service), installation services, and configuration services. Remote maintenance software and repair services available.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Silentmaxx designs, manufactures, and sells silent and fanless personal computers, workstations, notebooks, and servers under its KENKO, AKINO, and KANWA sub-brands, complemented by proprietary noise-reduction components such as fanless ATX power supplies, heatpipe-based passive CPU coolers, and vibration-damped hard-drive enclosures. Products are configured-to-order and sold primarily direct-to-consumer via the company's own e-commerce platform, with a dedicated B2B section serving trade and enterprise customers.

Product overview

Silentmaxx is a German company specializing in quiet and silent computing solutions. The product portfolio consists of three main sub-brands: KENKO (completely silent 0dB(A) passive PCs), AKINO (very quiet PCs that are silent during normal use and very quiet under load), and KANWA (quiet notebooks). Each brand offers various form factors including Mini/Kompakt, Performance, Ultimate, Gaming, Workstation CAD, and Server configurations. The company also develops and manufactures its own components including fanless power supplies, passive CPU coolers like the TwinBlock, HD-Silencer enclosures, and START-STOP power supplies. Silentmaxx was founded in 2000 and is the market leader in silent PCs, operating as a 100% equity-financed company in Rheinbach, Germany.

Differentiator

Problem solved

Functional benefit

Brands

• KENKO: Completely fanless, passively cooled PCs that operate silently (0dB). Premium class silent computers for all performance requirements.
• AKINO
• KANWA
• silma

Products and services

• KENKO Silent PCs (0dB, fully passive) Premium silent personal computers with no fans, fully passively cooled at 0dB(A) for users requiring absolute silence with high performance, available as Mini/Kompakt, Performance, Ultimate, and Gaming configurations.
• AKINO Quiet PCs Very quiet premium PCs that operate silently during everyday office and internet use and switch to very quiet operation under full load, available as office, gaming, CAD workstation, and server configurations.
• KANWA Quiet Notebooks Very quiet notebooks that often operate silently and inaudibly during office use, offered in Office and High-End Gamer (RTX 5050–5070) performance categories with prices starting around €915.
• Silent CAD / Workstation Systems Silent high-performance workstations built on AMD and Intel platforms with professional GPUs (Nvidia RTX A4000, Quadro), including Threadripper Pro configurations, optimized for AutoCAD, Revit, SolidWorks, CATIA, Autodesk Inventor, and DTP workloads, priced from €881 to €2,940.
• Silent Servers Very quiet to silent servers suitable for office environments, available as tower, mini, 19-inch rack, file, enterprise, web, mail, and VM servers with ECC memory and RAID configurations, priced from €965 to €1,007.
• Fanless ATX Power Supplies Silentmaxx's patented fanless ATX power supplies with 80Plus Platinum efficiency up to 94%, available in wattages from 400W to 1000W and used in KENKO and select AKINO systems as well as sold as standalone components.
• TwinBlock Passive CPU Cooler Large-format passive CPU cooler with over 1 square meter of heat-dissipation surface area, designed for high-TDP Intel Extreme processors and used in Silentmaxx high-end fanless PC builds.
• HD-Silencer Hard-Drive Enclosure Hard-drive enclosure that fully encapsulates the HDD to eliminate airborne noise and suppress body-borne vibration via a four-point rubber suspension, with cumulative sales of over 400,000 units.
• START-STOP Power Supplies Semi-passive ATX power supplies with dual cooling/power profiles that keep the fan silent in office workloads and switch to quiet operation only under heavy load, used across AKINO-class systems.
• silma Soundproofing / Damping Materials Heavy-foil and nubbed-foam-filming soundproofing materials under the silma brand, sold as standalone kits for customers retrofitting existing PC cases against structure-borne and air-borne noise.

Quantifiable outcome

• Over 100,000 customers served since 2001
• +3 more outcomes

Named customers17 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators7 records

Recent moves8 records

Expansion highlights5 records

Emerging players

• Arctic: Arctic (formerly Arctic Cooling) makes low-noise fans, CPU coolers, and small-form-factor PCs in the German-speaking market, competing with Silentmaxx on quiet-operation value and component-level pricing.

Direct peers

• EndPCNoise: EndPCNoise assembles and sells silent PCs and noise-damped workstations to professionals and enthusiasts, competing directly with Silentmaxx's KENKO and AKINO silent-desktop lineups in the North American market.
• Hush: Hush is a US-based specialist that builds custom-configured silent and fanless PCs for home, office, and professional use cases via a direct-to-consumer configurator — a GTM closely mirroring Silentmaxx's silentmaxx.de storefront and configurator model.
• Akasa: Akasa produces fanless cases and compact fanless PC platforms using heatpipe convection, sharing Silentmaxx's core passive-cooling design philosophy and competing for fanless Mini-PC buyers in the same form factor.
• QuietPC: QuietPC is a UK-based retailer and assembler of silent PCs, fanless mini-computers, and noise-damped workstations, offering a comparable product mix to Silentmaxx including fanless NUC-class systems and workstation-class silent PCs.
• Streacom: Streacom designs and manufactures fully-fanless chassis and fanless mini PCs built around heatpipe/convection cooling architectures — directly comparable to Silentmaxx's proprietary heatpipe-Kühlkonzept and KENKO passive-cooling IP.

Broad incumbents

• be quiet!: be quiet! is a major German PC components brand specializing in ultra-quiet PSUs, CPU coolers, fans, and cases — a direct overlap with Silentmaxx's silma, fanless PSU, and damped-chassis product lines from the broader quiet-PC ecosystem.
• Noctua: Noctua is the premium benchmark for low-noise fans and CPU coolers, and competes with Silentmaxx's cooling IP by reducing fan noise in conventional active-cooled PCs rather than eliminating fans altogether.
• Supermicro: Supermicro supplies compact and rack-mount server platforms including low-noise workstation models; Silentmaxx's tower and 19-inch silent servers with ECC RAM (up to 512GB) overlap with Supermicro in noise-sensitive enterprise and office deployments.
• Cooler Master: Cooler Master is a global PC cooling and chassis manufacturer offering quiet and passive CPU coolers, cases, and complete systems that overlap with Silentmaxx's cooling and chassis product breadth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/silentmaxxde
• LinkedInlinkedin.com/company/silentmaxx

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 Silentmaxx