What GEMSTAB does

GEMSTAB is a French wine treatment service company founded in November 1998 by Eric LECOEUVRE and headquartered in Marguerittes, France. The company delivers on-site, additive-free membrane-based wine treatments—tartrate stabilization, tangential filtration, pH adjustment, partial dealcoholization, ethylphenol remediation for Brettanomyces contamination, and lees/bourbes valorization—to private wineries, cooperative wineries, independent winemakers, wine merchants, and consulting oenologists. Treatments are performed at client facilities using a fleet of mobile units containing specialized trailers and adapted equipment, with all operations conducted under HACCP guidelines.

The technology base is membrane separation: electrodialysis (anion, cationic, and bipolar membrane variants), tangential filtration using ceramic or organic membranes, reverse osmosis, and membrane contactors. GEMSTAB combines a service-provision model with equipment distribution of industrial processes from two long-standing strategic partners: Oenodia (EURODIA division, since 1998) contributing the STARS® technology family (STARS® tartrate stabilization, STARSxf® coupled filtration-stabilization, STARSpH® pH adjustment, STARSaa® partial dealcoholization), and Ju.Cla.S (Vason Group division, since 2020) contributing MFTC® modular tangential filtration, EASYFERM® yeast rehydration, SMARTLEES® residue valorization, and MMR+® intelligent gas management. The combined portfolio represents approximately 15 patented processes developed in collaboration with the University of Verona and INRA. STARSpH® received the Sitevi 2007 Gold Medal.

GEMSTAB operates a regionally organized structure built around the Marguerittes headquarters and 7 French regional agencies (Provence, Aquitaine, Alsace, Val-de-Loire, Languedoc-Roussillon, Champagne, Vallée du Rhône-Beaujolais) plus international partner offices in Barcelona (Spain), Portugal, and Germany, with cross-border coverage extending into Luxembourg. Pricing is quote-based with multi-year service contracts; revenue is generated through on-site treatment service fees and capital equipment sales to wineries. The company is privately held, founder-led, and employs 11–50 staff.

Name

GEMSTAB

Legal name

Gemstab

Website

https://gemstab.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

GEMSTAB provides additive-free membrane-based wine treatment services (tartrate stabilization, filtration, pH adjustment, dealcoholization, ethylphenol remediation) to French and European wineries. Founded in 1998, it operates 8 regional agencies across France plus partner offices in Spain, Portugal, and Germany.

Ownership category

akta.pro rank

Product category

Wine Treatment Services

NAICS

Wineries (31213)

SIC

Beverages (2080)

akta.pro primary industry

Clarifying & Finings Agents (Beer/Wine/Juice) (AFAJAIAI)

akta.pro secondary industry

Wineries & Vineyards (Tasting Rooms) (THAFALAE)

Keywords

• Wine treatment services
• Wine electrodialysis
• Tartrate stabilization
• Tangential filtration
• Oenological equipment distribution

Headquarters

HQ city

Marguerittes

HQ country

France

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Wine Treatment Service Provision: GEMSTAB provides on-site wine treatment services to wineries using their mobile units and proprietary technologies. Services include tartrate stabilization, tangential filtration, pH adjustment, partial dealcoholization, ethylphenol treatment, and lees/bourbes valorization. The company has been offering custom service provision (service à façon) for nearly 25 years.
2. Oenological Process Equipment Distribution: Distribution of industrial oenological processes from partners Oenodia (STARS® technology) and Ju.Cla.S (MFTC®, EASYFERM®, SMARTLEES®, MMR+®). Processes are sold as equipment installations to wineries.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels3 records

Core offering

GEMSTAB provides on-site, mobile wine treatment services to French and international wine producers using membrane separation technologies. Its portfolio covers tartaric stabilization, tangential filtration, pH adjustment, partial dealcoholization, ethylphenol treatment, and pomace/lees valorization, all performed without chemical additives and compliant with HACCP. The company also distributes proprietary oenological process equipment from partners Oenodia (STARS®) and Ju.Cla.S (MFTC®, EASYFERM®, SMARTLEES®, MMR+®) to wineries across eight French regional agencies plus Spain, Portugal, and Germany.

Product overview

GEMSTAB is a French wine treatment service company providing on-site winemaking services to wine producers across France and internationally. The company operates a fleet of mobile units staffed by specialized technicians who perform membrane-based treatments directly at wineries. The core service portfolio includes tartaric stabilization, tangential filtration, pH adjustment, partial dealcoholization, ethylphenol treatment, and pomace valorization—all using electro-membrane technologies without chemical additives. GEMSTAB also distributes proprietary process technologies developed by industrial partners Oenodia (STARS® family) and Ju.Cla.S (MFTC®, EASYFERM®, SMARTLEES®, MMR+®), offering equipment sales alongside its service operations. Services are delivered through 7 regional agencies across France plus operations in Spain, Portugal, Germany, and Luxembourg.

Differentiator

Problem solved

Functional benefit

Products and services

• Stabilisation Tartrique (Tartaric Stabilization – STARS®) On-site tartaric stabilization service using electro-membrane treatment to selectively extract potassium, calcium, and tartrate ions from wine, preventing tartrate crystal formation in bottles. The treatment is continuous, additive-free, preserves wine typicity, and has been approved by European regulation CE 606/2009 and validated by INRA studies.
• Filtration Tangentielle (Tangential Filtration – MFTC®) On-site tangential filtration service using ceramic or organic membranes to clarify wine and ensure microbiological stability, with capacity from 5 hL/h to 450 hL/h using 1.8mm internal diameter fibers that operate at ambient temperature without dissolved oxygen intake.
• Couplage Filtration + Stabilisation (STARSxf®) Single-step combined tangential filtration and tartaric stabilization service that reduces processing time and intermediate pumping in the winery, delivering both microbiological and tartrate stability in one pass.
• Ajustement du pH / Acidification (STARSpH®) On-site pH adjustment service using bipolar and cationic membrane electrodialysis to selectively extract potassium, rebalancing wine acidity by up to 0.3 points without chemical additives. Authorized under EU regulation CE 53211; awarded Sitevi 2007 Gold Medal.
• Désalcoolisation Partielle (Partial Dealcoholization – STARSaa®) On-site partial dealcoholization service using reverse osmosis and membrane contactor technologies to selectively extract up to 3° of alcohol while preserving the wine's organoleptic qualities, without distillation or water addition. Authorized under EU regulation CE 606/2009.
• Traitement des Éthylphénnols (Ethylphenol Treatment) On-site treatment for wines affected by Brettanomyces contamination, using reverse osmosis combined with activated charcoal to reduce volatile phenols and reveal the wine's true sensory qualities without alteration. OIV-recognized since 2014.
• Valorisation des Bourbes (Pomace Valorization) On-site service using centrifugal pre-filtration and ceramic membrane technology to recover and filter grape sediment (bourbes), reclaiming up to 80% of material otherwise destined for distillation and increasing saleable production volume.
• EASYFERM® — Automated Yeast Rehydration System Distributed equipment offering — automatic yeast rehydration and pre-conditioning system developed by Ju.Cla.S in partnership with the University of Verona, with 0.5 kg production capacity, adjustable rehydration cycle time, and 10% biomass gain in a 30-minute cycle.
• SMARTLEES® — Residue Valorization Equipment Distributed equipment offering — tangential filtration system for high-viscosity winery byproducts (lees, fining residues, pomace, filtration retentate) with 80% recovery rate and output turbidity under 1000 NTU, managed dynamically without stirring.
• MMR+® — Intelligent Gas Management Equipment Distributed equipment offering — hydrophobic microporous membrane contactor system for precise O2 (0–8 mg/l, ±0.1 mg/l) and CO2 (0–12 g/l, ±0.1 g/l) gas management in wines, handling up to 30 hL/h flow rate at pressures up to 1 bar.
• MFTC® — Modular Tangential Filtration Equipment Distributed equipment offering — modular tangential filter range with capacity from 5 hL/h to 450 hL/h using 1.8mm internal diameter symmetrical polypropylene membranes, reducing clogging, heating, and breakage while eliminating dissolved oxygen intake at ambient temperature.

Quantifiable outcome

• Tartrate stability guaranteed for all market circuits
• +8 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Four partnerships are on record, tiered core and supporting.

• Ju.Cla.S (Vason Group Division)coreStrategic or Co-development Partner · 1 January 2020GEMSTAB partners with Ju.Cla.S, the oenological division of the international Vason Group, to distribute their innovative oenological processes in France. Ju.Cla.S develops processes including MFTC® tangential filters, EASYFERM® yeast rehydration, SMARTLEES® lees valorization, and MMR+® gas management. Founded in 1970 by Gian Carlo Vason, Ju.Cla.S operates in 4 countries and distributes products in over 40 countries worldwide. They have developed approximately 15 patented processes in partnership with the University of Verona.
• Oenodia (EURODIA Division)coreStrategic or Co-development Partner · 1 January 1998GEMSTAB is a commercial partner of Oenodia for France, distributing their STARS® membrane technology solutions. This partnership began in 1998 when GEMSTAB accompanied Oenodia in the commercial development of STARS® technology for tartrate stabilization. GEMSTAB proposes this technology as a service provision, having deployed installations throughout France for over 20 years. Oenodia is the oenology division of EURODIA, specializing in eco-membrane processes for the food industry, founded in 1988 by Bernard Gillery.
• INRA (Institut National de la Recherche Agronomique)supportingStrategic or Co-development Partner · 1 January 1992Research partnership with INRA in the 1990s that led to the development of STARS® tartrate stabilization technology. INRA studies demonstrated that electro-membrane treatment fully respects wine typicity, providing scientific validation for the technology.
• University of VeronasupportingStrategic or Co-development PartnerAcademic research partner of Ju.Cla.S for the development of oenological processes. Joint research has led to innovations in yeast rehydration (EASYFERM®), lees valorization (SMARTLEES®), and gas management (MMR+®) technologies.

Scale indicators6 records

Recent moves13 records

Expansion highlights5 records

Broad incumbents

• Bucher Vaslin: French subsidiary of Switzerland's Bucher Industries and one of the largest global suppliers of winemaking equipment. While primarily a press and equipment manufacturer, Bucher Vaslin competes in tangential filtration and could expand into the additive-free membrane stabilization segment GEMSTAB serves.
• Della Toffola Group: Italian-based manufacturer of complete winemaking equipment including filtration, stabilization, and bottling lines. A broad incumbent serving global wineries with overlapping capabilities in tangential filtration and wine treatment, though typically as installed equipment rather than on-site service.
• AEB Group: International supplier of oenological products including enzymes, fining agents, and fermentation aids. While AEB sells consumables rather than services, it competes with GEMSTAB in the broader wine-treatment value chain and could expand into membrane-based treatments.

Direct peers

• Enoveneta: Italian manufacturer of oenological filtration and stabilization equipment including cross-flow filtration systems. Directly comparable to GEMSTAB's MFTC® tangential filtration service and serves overlapping customer segments of mid-sized wineries and cooperatives.
• Oenodia (EURODIA): Oenodia is the oenology division of EURODIA, the inventor of the STARS® electrodialysis family for tartrate stabilization, pH adjustment, and dealcoholization. Oenodia is both GEMSTAB's technology partner and a direct competitor in wine membrane services globally, making it the single most comparable peer.
• Ju.Cla.S (Vason Group): Ju.Cla.S is the oenological equipment division of Italy's Vason Group, developer of MFTC®, EASYFERM®, SMARTLEES®, and MMR+® technologies. As GEMSTAB's 2020 distribution and process partner, Ju.Cla.S sells directly comparable equipment to wineries and overlaps with GEMSTAB's core offerings in tangential filtration and gas management.
• PSS S.r.l. (Padoan/Sartori Separazioni): Italian specialist in membrane filtration for wine and food applications, offering cross-flow and tangential filtration systems. Direct competitor in membrane-based wine clarification and stabilization with comparable technology to GEMSTAB's tangential filtration offering.

Others

• Perlemb BV / ETS Laboratories: Adjacent wine-industry service provider offering analytical and quality-control laboratory services to wineries. Not a direct competitor but serves the same customer base and could expand into treatment-adjacent services that compete with parts of GEMSTAB's offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/GEMSTABWINE

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 GEMSTAB