What Ninja Circuits does

Ninja Circuits is a U.S.-based electronic manufacturing services company specializing in rapid-turn PCB assembly prototyping and low-volume production, headquartered in Mankato, Minnesota. Founded in 2015 as a division of parent company EI Microcircuits, the company targets engineers, product teams, and innovators across medical devices, aerospace and aviation, military and defense, automotive electronics, industrial controls, telecommunications, and high-tech sectors, with quantities typically ranging from 1 to 200 assemblies and turnaround options from 24 hours to 10 business days.

The company's core technology stack centers on PCB assembly across SMT, through-hole, mixed-technology, and box-build formats, with differentiated equipment including vapor phase reflow soldering for precision thermal control, 3D automated optical inspection, lab-grade X-ray inspection for BGA and bottom-terminated components, robotic selective soldering, and flying probe electrical testing. Operations are backed by IPC-A-610 Class II and Class III certified technicians, ITAR registration for defense work, and RoHS-compliant lead-free processes, all conducted at a single U.S. manufacturing facility.

Revenue is generated on a quote-based, project-by-project basis with no minimum order quantities, offering turnkey, consignment, and hybrid material sourcing options to customers. Go-to-market relies on direct sales through a website quote request system with file upload (Gerber, BOM, Excel, Zip), inside sales follow-up within 24-48 hours, phone and email engagement, and an industry-vertical content marketing program. A structural differentiator is the handoff pathway to sister company EI Microcircuits for design-for-manufacturing review and scaled production once customers move beyond prototyping, creating an internal ecosystem that captures more of each customer's lifecycle.

Name

Ninja Circuits

Legal name

Ninja Circuits

Website

https://ninjacircuits.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

101–250 employees

Short description

Ninja Circuits is a U.S.-based PCB assembly manufacturer in Mankato, Minnesota, specializing in rapid-turn prototyping and low-volume production for engineers across medical, aerospace, defense, automotive, industrial, telecom, and high-tech sectors.

Ownership category

akta.pro rank

Product category

Electronic Manufacturing Services

NAICS

Printed Circuit Assembly (Electronic Assembly) Manufacturing (334418)

SIC

Printed Circuit Boards (3672)

akta.pro primary industry

PCB Assembly (PCBA/EMS) (HDAHAOAI)

akta.pro secondary industry

Industrial PCB & Substrate Components (Bare PCBs, rigid-flex, ceramic substrates, thick-film) (IMAGAJAM)

Keywords

• PCB prototyping services
• Quick-turn PCB assembly
• Low-volume electronics manufacturing
• SMT BGA assembly
• Vapor phase reflow soldering

Headquarters

HQ city

Mankato

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. PCB Prototype Assembly: Rapid prototype assembly services for electronic circuit boards. Prototypes are the primary business focus, with quick-turn capabilities ranging from 24 hours to 10 business days. Quantities typically range from 1-10 assemblies for prototyping, with short-run production up to 200 pieces.
2. Turnkey PCB Assembly: Full material procurement and assembly service where Ninja sources all components, PWBs, and performs complete assembly. Uses qualified suppliers to reduce material costs with end-to-end inventory management.
3. Consignment Assembly: Customer-supplied components assembly service with flexible options including partial consignment where customer provides long-lead-time parts and Ninja sources the rest. Hybrid approach available.
4. PCB Repair and Rework: Repair, rework, upgrades, and replacement services for existing assemblies regardless of original manufacturer. Includes component removal/replacement, IC swaps, solder joint rework, and design modifications.
5. Box-Build Assembly: Complete system assembly including enclosures, wiring, connectors, displays, power supplies, firmware loading, and packaging. Full integration from completed PCBs to finished deliverable units.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Ninja Circuits is a U.S.-based electronic manufacturing services provider that assembles PCB prototypes and low-volume production runs for engineers and product teams. Its core offering is quick-turn printed circuit board assembly (PCBA) with turnaround options from 24 hours to 10 business days, supported by SMT, through-hole, mixed-technology, and box-build assembly capabilities, plus PCB repair and rework services.

Product overview

Ninja Circuits is a U.S.-based PCB assembly manufacturer offering a portfolio of interconnected services centered on rapid prototyping and low-volume production. The core offering spans PCB Prototyping (quick-turn, 1-10 assemblies), Quick-Turn PCB Assembly (24-hour to 10-day turnaround), and general PCBA services. Supporting these are specialized capabilities including SMT & BGA Assembly, Through Hole Assembly, and Vapor Phase Reflow Soldering for precision soldering. Turnkey & Consignment options provide flexible material procurement. Box-Build Assembly extends beyond bare boards to complete system integration. PCB Repair Services and Low Volume Production round out the lifecycle from prototype through short-run production. All services are backed by sister company EI Microcircuits for scalability to production volumes.

Differentiator

Problem solved

Functional benefit

Products and services

• PCB Prototyping Rapid PCB prototyping service specializing in quick-turn, proof-of-concept, and one-time builds for engineers and innovators. Handles quantities typically ranging from 1-10 assemblies with quotes returned within 24-48 hours. Supports turnkey, consigned, and hybrid component sourcing.
• Quick-Turn PCB Assembly Fast turnaround PCB assembly service offering 24-hour, 48-hour, 5-day, and 10-day turnaround options. Uses precision placement, vapor-phase reflow soldering, and 3D AOI inspection to deliver high-quality quick-turn builds.
• PCB Assembly (PCBA) Custom and prototype PCB assembly services including full turnkey and consigned component options. Handles components, bare boards, electro-mechanical assembly, conformal coating, and engineering support, supporting 2-layer to 60+ layer rigid, rigid-flex, and RF/microwave boards.
• SMT & BGA Assembly Surface Mount Technology assembly including BGA placement, fine-pitch components, and high-density packages. Uses vapor-phase reflow soldering meeting IPC-A-610 requirements, with 3D AOI and X-ray inspection for solder joint verification.
• Through Hole PCB Assembly Through-hole mounting service providing strong solder bonds for larger components including electrolytic capacitors, semiconductors, and electro-mechanical relays. Uses robotic selective solder technology combined with skilled hand soldering where needed.
• Turnkey & Consignment PCB Assembly Flexible materials procurement options including full turnkey (Ninja sources all components, PWBs, and assembly), consignment (customer supplies components), and hybrid consignment arrangements. Typically handles 10-200 pieces with end-to-end inventory management.
• Box-Build Assembly Services Complete system assembly including enclosures, wiring, displays, connectors, power supplies, firmware loading, and packaging. Manages low-volume builds with visual inspection and functional testing from completed PCBs to finished deliverable units.
• PCB Repair Services PCB repair, rework, upgrades, and replacement services for existing assemblies regardless of original manufacturer. Includes component removal/replacement, IC swaps, solder joint rework, design modifications, and X-ray inspection for diagnosis.
• Low Volume Production Short-run production services for bridging gaps when contract manufacturers cannot respond, build-on-demand options, and legacy product support. Optimizes transition to full-scale production via parent company EI Microcircuits with design-for-manufacturing review.

Quantifiable outcome

• Quotes returned within 24-48 hours
• +3 more outcomes

Named customers6 records

Segments8 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• EI MicrocircuitscoreStrategic or Co-development Partner · 1 January 2015Founded in 2015 as a division of EI Microcircuits, a leading provider of high-reliability electronic manufacturing services. EI Microcircuits launched Ninja Circuits to bridge the gap between design and production, offering unmatched speed, precision, and quality in PCB fabrication. EI Microcircuits has 35 years of experience building high-reliability assemblies and can manage orders with partial or fully consigned parts procurement. When customers are ready for production volumes, Ninja facilitates transfer to EI Microcircuits for design-for-manufacturing review and scaled production.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Sanmina: Global Tier-1 EMS provider offering full-service PCB assembly from prototype through high-volume production — competes with Ninja in early-stage NPI work and ultimately absorbs the production handoff that Ninja routes to EI Microcircuits.

Direct peers

• Sunstone Circuits: Oregon-based PCB fabrication and prototype assembly provider offering quick-turn boards and assembly — comparable combined fab+assembly model with similar engineer self-service quote tooling.
• 4PCB (Advanced Circuits): Colorado-based quick-turn PCB fab and assembly house competing on prototype lead time and small-batch pricing — comparable target customer of independent engineers and small engineering teams.
• Screaming Circuits: Oregon-based quick-turn prototype PCBA shop owned by MacroFab, targeting the same engineer-and-innovator customer base with 1-250 piece builds and similar 24-hour turnaround tiers.
• Advanced Assembly: Aurora, CO-based quick-turn PCB prototype assembler specializing in 1-500 piece builds for engineers. Closest U.S. direct competitor with similar speed-of-turn positioning, consignment/turnkey options, and engineer-focused GTM.
• Sierra Circuits: California-based PCB prototype manufacturer offering quick-turn fabrication, assembly, and DfM review — overlapping strongly on prototype positioning, file-upload quote flow, and high-reliability capability.

Emerging players

• Tempo Automation: San Francisco-based software-driven PCB prototype manufacturer with automated factory model — overlapping on speed and engineer self-service but with a different cost structure and tech-forward positioning.
• MacroFab: Houston-based PCB assembly marketplace and contract manufacturer with a software-driven quote-to-production platform — competes for the same engineer self-service prototyping workload with a more automated, software-led model.

Regional players

• JLCPCB: China-based low-cost PCB fabrication and assembly platform — relevant comparable on volume and price for the commodity prototype segment that Ninja serves in non-regulated verticals.
• PCBWay: China-based global PCB prototype and assembly provider offering very low-cost quick-turn PCBA — competes primarily on price for prototype jobs where U.S.-based service is not a requirement.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ninja-circuits

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 Ninja Circuits