Stirweld

What Stirweld does

Stirweld is a French industrial technology company that develops and commercializes Friction Stir Welding (FSW) solutions designed to retrofit onto standard 3, 4, or 5-axis CNC machines and high-payload industrial robots. Founded in 2017 and headquartered in Rennes, France, with wholly-owned subsidiaries in Germany (Böblingen) and the United States (Rochester Hills, MI), the company addresses a core barrier to FSW adoption — the high capital cost of dedicated FSW machines — by offering modular FSW heads (Standard, Smart with HMI/ERP integration, and Retractable Pin for defect-free aerospace welds), an FSW spindle for robots, and a consumable tooling portfolio covering Al/Al, Al/Fe, Al/Si, and Cu material combinations. Proprietary features include closed-loop force control, precision tool cooling that maintains the optimal 480-520°C welding window for aluminium, a four-layer CNC spindle protection system, and an intelligent tool holder with EN 9100-compatible temperature sensing for 100% quality control.

The company monetizes through hardware sales of FSW heads, robotic spindles, and consumable tools, complemented by professional services including design assistance, prototyping, custom clamping systems, two-day training programs, and after-sales support. Its enterprise-focused go-to-market combines direct sales from three subsidiary workshops, an 8-partner international distributor network, event-driven demand generation, and content marketing aimed at educating the market on FSW technology. The customer base spans automotive (Valeo, Tesla, Nemak, KARI), aerospace (Airbus, Ariane Group, Safran, CNES), defense (Thales), HVAC/industrial (Danfoss), and research institutions (CEA, TWI, CNRC, Institut de Soudure, Lortek), with 88 FSW solutions installed, 1,200+ active tools, and over 1 million parts welded by customers globally. 85% of sales are international, reflecting the cross-border distribution buildout.

Following a €6 million funding round in July 2024 led by Xplore by Épopée Gestion with participation from French Tech Seed, Stirweld is scaling headcount (planned doubling by 2026), expanding its international subsidiary footprint, and extending into hydrogen storage and EV battery cooling applications. The revenue model is a hybrid of hardware sales, recurring consumable tooling (with stated tool life of ~2,000 meters in standard Al/Al under 8mm thickness), and service attach, positioning the company as an industrial equipment vendor with a razor-and-blade consumables tail.

Name

Stirweld

Legal name

STIRWELD

Website

https://stirweld.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

11–50 employees

Short description

Stirweld is a French industrial technology company that develops Friction Stir Welding (FSW) heads, robotic spindles, and consumable tools designed to retrofit onto existing CNC machines and robots. It serves enterprise manufacturers in aerospace, automotive (including EV), defense, industrial, and research sectors globally through wholly-owned subsidiaries and a distributor network.

Ownership category

akta.pro rank

Product category

Industrial Welding Equipment

NAICS

Metalworking Machinery Manufacturing (33351)

SIC

Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Welding, Joining & Soldering Equipment (Arc, Resistance, Friction, Brazing) (IMAHADAH)

akta.pro secondary industry

CNC Machine Tools (Turning, Milling, Machining Centers) (IMAHADAA)

Keywords

• Friction stir welding
• Welding equipment
• Aluminum welding
• CNC integration
• Solid-state welding

Headquarters

HQ city

Saint-grégoire

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. FSW Equipment Sales: Sale of FSW equipment including FSW heads for CNC machines, FSW spindles for robots, and related accessories. One-time hardware purchases with various configuration options.
2. FSW Tools: Sale of consumable and replacement FSW tools (shoulders and pins) for different materials and applications. Standard tools and custom-developed tools available.
3. Professional Services: Design assistance, prototyping, clamping system development, and training services to help customers implement FSW technology. Two-day training programs and ongoing technical support.
4. After-sales Support: Technical support, spare parts, and ongoing customer assistance for installed FSW solutions.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Stirweld designs, manufactures, and sells friction stir welding (FSW) equipment and consumable tools that retrofit onto existing CNC machines and industrial robots, enabling solid-state aluminium and dissimilar-material welding without requiring dedicated specialized welding machines. The company complements its hardware with design assistance, prototyping, custom clamping systems, training, and after-sales support services for industrial manufacturers.

Product overview

Stirweld offers a comprehensive portfolio of Friction Stir Welding (FSW) solutions that make this advanced welding technology accessible and economical. The core product line includes FSW heads for CNC machines (Standard, Smart, and Retractable Pin variants) and FSW spindles for robots, all designed to retrofit existing manufacturing equipment rather than requiring specialized dedicated machines. Supporting the equipment are specialized FSW tools for different materials (Al/Al, Al/Fe, Cu), accessories including automatic head changers, temperature measurement systems, and tool holders. The offering is complemented by services covering design assistance, prototyping, custom clamping systems, training, and after-sales support. Stirweld also provides educational resources including a practical guide and equipment catalogues. The portfolio is designed around making FSW affordable by integrating with standard CNC machines (3, 4, or 5-axis) and industrial robots, with key differentiators including force control, tool cooling, machine protection, and force recording capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Standard FSW Head for CNC Friction stir welding head that adapts to 3, 4, or 5-axis CNC machines, adding FSW capabilities with force control, real-time force tracking, tool cooling, and spindle protection for industrial manufacturers.
• Smart FSW Head for CNC Advanced FSW head for CNC machines that combines the Standard FSW Head features with a human-machine interface for data management, ERP integration, enhanced force and temperature control, real-time usage tracking, and critical data retention.
• FSW Head with Retractable Pin for CNC FSW head for CNC machines with force control and recording, tool cooling, spindle protection, and a retractable pin that eliminates the FSW exit hole — particularly valuable for aerospace sectors.
• FSW Spindle for Robot Robotic FSW solution that adapts to high payload robots, transforming a standard robot into a hybrid tool that merges welding and machining with an automatic tool changer.
• FSW Tools - Al/Al (Aluminium/Aluminium) Standard FSW tool for welding aluminium 2xxx, 5xxx, 6xxx and 7xxx alloys, featuring a Whistle Notch attachment system.
• FSW Tools - Al/Fe (Aluminium/Steel) FSW tool designed for welding aluminium-to-steel dissimilar material assemblies.
• FSW Tools - Cu (Copper) FSW tool designed for welding copper pieces, optimized for materials requiring specific thermal and mechanical properties.
• Automatic FSW Head Changer Automated head-mounting system that enables automatic switching between FSW heads for enhanced workflow efficiency.
• FSW Temperature Measurement (Smart Tool Holder) Intelligent tool holder that measures weld temperature in real time, enabling precise control of welding parameters and 100% quality control of FSW parts, compatible with EN 9100 standard.
• Standard Tool Holder Standard tool holder for FSW operations providing reliable tool mounting and alignment.
• Design Assistance Service Expert guidance to harmonize part designs with the unique demands of FSW for flawless fit and function.
• Prototyping Service Collaborative design, precision clamping solutions, comprehensive quality checks, and continuous improvement for FSW prototypes.
• Clamping System Custom-designed clamping jigs to hold workpieces during the FSW process, with each jig unique to specific panel requirements.
• Friction Stir Welding Training Two-day detailed training program focused on practical application and essential knowledge to equip staff with expertise to effectively implement FSW technology.
• After-Sales Support Dedicated after-sales support and hotline for fine-tuning welding parameters, addressing defects, and managing quality control, plus spare parts supply for installed FSW solutions.

Quantifiable outcome

• 2000 meters average tool life in standard Al/Al configuration with thickness under 8mm
• +3 more outcomes

Named customers15 records

Segments7 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Scale indicators7 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• TWI Ltd: TWI is the UK-based inventor of Friction Stir Welding and the global technology licensor for FSW. It is the most direct comparable to Stirweld as both serve manufacturers seeking to adopt FSW for aluminum joining; TWI also operates as Stirweld's customer/partner according to the provided data.
• HBF GmbH: HBF (Heinz Berger Maschinenfabrik) is a German specialist in FSW machine tools and gantry systems, particularly for large-format aluminum structures in shipbuilding, rail, and aerospace. Directly competes with Stirweld in the FSW equipment market with a focus on dedicated machines rather than CNC retrofits.
• Valcom S.r.l. Valcom is an Italian manufacturer of FSW machines and tooling for industrial applications. Like Stirweld, it supplies FSW equipment, tools, and services to OEMs across automotive, aerospace, and industrial segments, making it a close direct peer.
• MTI (Manufacturing Technology Inc.): MTI is a US-based FSW equipment manufacturer offering dedicated FSW machines and tooling. It overlaps with Stirweld's aerospace, defense, and EV customers in North America and represents the strongest US-headquartered FSW competitor.

Broad incumbents

• ESAB Corporation: ESAB is a global welding and cutting equipment conglomerate with a much broader portfolio than Stirweld. It overlaps with Stirweld's welding equipment and consumables business and has the scale to enter the FSW niche as the market expands.
• Lincoln Electric Holdings: Lincoln Electric is a leading global welding products and solutions company with extensive industrial distribution. While its core is arc welding, its scale, R&D resources, and customer relationships in automotive and heavy industry could be redirected toward FSW, making it a broad incumbent threat.
• Fronius International: Fronius is an Austrian leader in welding technology with strong automotive OEM relationships. Its welding systems and automation expertise overlap with Stirweld's robotic FSW spindle offering, and Fronius could extend into solid-state welding as a competitor or partner.

Emerging players

• Böllhoff Group: Böllhoff is a German specialist in joining technology (riveting, fastening, welding) supplying automotive and aerospace OEMs. It is comparable to Stirweld through its automotive/aerospace customer overlap and its focus on advanced mechanical joining techniques, though its primary focus is fastening rather than welding.

Others

• KUKA Robotics: KUKA supplies the high-payload industrial robots that Stirweld's FSW spindle integrates with. It is comparable as an enabling/ecosystem partner — Stirweld's robotic FSW solution transforms a KUKA-class robot into a hybrid welding/machining cell, making KUKA both a strategic partner and a potential competitor if it bundles its own FSW end-effector.

Regional players

• Institut de Soudure (Welding Institute France): Institut de Soudure is a French welding technology institute that provides R&D, training, and welding services to industry. It appears as a Stirweld customer/partner in the provided data and represents an overlapping French ecosystem presence with comparable training, prototyping, and welding expertise offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 records

Funding overview

Funding rounds2 records

Investors5 records

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 Stirweld