COMPOSTRI

What COMPOSTRI does

Compostri (legal name: Association Compostri) is a French non-profit association (Association loi 1901) founded in 2007 and headquartered at Le Solilab, 8 rue de Saint Domingue, Nantes. The association's core activity is the deployment and operation of shared composting (compostage partagé) infrastructure across Nantes Métropole, currently encompassing nearly 400 composting sites distributed across private (copropriétés), garden, and school locations. Residents locate sites through an interactive digital map and the Compost'ON mobile application launched in 2024. A network of trained volunteer site referents manages day-to-day site operations, supported by the association's coordination team of approximately 15 staff.

The organization's business model is a hybrid of association-based and service-based revenue. Membership fees from individual residents provide a recurring base, complemented by professional training programs (Formation Référent·e de site and Formation Guide Composteur·e) aligned with ADEME's PGprox national pathway. Additional revenue comes from corporate training engagements (e.g., a documented contract with Suez) and likely public/municipal grants from Nantes Métropole. Supporting offerings include participatory workshops (La Boucle du Compost), vermicomposting workshops (in partnership with Les Boites Vertes), an educational garden (Jardin pédagogique La Crapaudine), and a library of free practical guides and pedagogical dossiers. Distribution and customer acquisition are predominantly community-led: word-of-mouth, a newsletter (Le Grand Retournement), social media, participation in the national 'Tous au Compost' campaign, and partnerships with associations such as Bricolowtech.

Strategically, Compostri's competitive position rests on its 18-year operating history in Nantes Métropole, its dense network of nearly 400 sites, its ADEME-aligned training credentials, and its embedded volunteer ecosystem coordinated in partnership with Nantes Métropole and the national Réseau Compost Citoyen. There are no funding rounds, no parent company, no M&A activity, and no disclosed financial figures; the organization operates as an independent, member-based association governed by French non-profit law. Geographic scope is currently limited to Nantes Métropole, with international cooperation referenced as an exploratory activity area.

Name

COMPOSTRI

Legal name

Association Compostri

Website

https://compostri.fr

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

11–50 employees

Short description

Compostri is a French non-profit association founded in 2007 that operates nearly 400 shared composting sites across Nantes Métropole, training volunteer site referents, running ADEME-aligned professional training programs, and serving local residents, schools, condominiums, and corporate clients such as Suez.

Ownership category

akta.pro rank

Product category

Community Composting Services

NAICS

Waste Management and Remediation Services (562)

SIC

Refuse Systems (4953)

akta.pro primary industry

Composting Facility Operations (Windrow, ASP, In-Vessel) (BPALAEAB)

akta.pro secondary industry

Organics & Composting Programs (Food Waste, Green Waste) (BPABALAC)

Keywords

• Community composting
• Composting training
• Organic waste management
• Urban composting services
• Environmental education

Headquarters

HQ city

Nantes

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Membership Fees: Annual membership fees collected from individuals who join the association as members/supporters.
2. Training Programs: Professional non-certifying training programs for site referents and master composters, offered as part of ADEME's PGprox pathway.
3. Corporate Training: Training services provided to enterprises such as Suez for employee composting education.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Compostri is a French non-profit association that deploys and manages nearly 400 shared composting sites across Nantes Métropole, enabling residents without individual garden space to compost organic waste collectively. It also delivers training programs for site referents and master composters under ADEME's PGprox pathway, runs participatory workshops on composting and vermicomposting, and operates an educational garden and digital tools (interactive map, Compost'ON app) to support community engagement.

Product overview

Compostri operates as a unified non-profit association offering a coordinated ecosystem of composting education and community services. The core activity is shared/collective composting (compostage partagé) with nearly 400 composting sites across Nantes Métropole. Supporting services include hands-on workshops (Ateliers Lombricompostage, La Boucle du Compost), professional training programs (Formation Référent.e de site, Formation Guide Composteur.e), an educational garden (Jardin pédagogique La crapaudine), and Compost'ON, a mobile application guide for users. The association also provides free educational resources including practical guides, pedagogical dossiers, and video content. This integrated offering combines physical infrastructure (composting sites), educational programming (workshops and trainings), digital tools (interactive map and app), and community engagement (events, volunteer programs) to promote composting across the Nantes metropolitan area.

Differentiator

Problem solved

Functional benefit

Products and services

• Compostage partagé (Shared Composting) Core collective composting service with nearly 400 shared composting sites across Nantes Métropole, including private (copropriété), garden, and school composters, enabling residents to compost organic waste at neighborhood sites.
• Formation Référent.e de site (Site Manager Training) Professional non-certifying training program for individuals managing and animating citizen composting sites, aligned with ADEME's PGprox national pathway.
• Formation Guide Composteur.e (Master Composter Training) Comprehensive training program covering composting fundamentals and specializations (pailleur.euse) for aspiring guide composters, aligned with national standards.
• La Boucle du Compost (Participatory Workshop) Participatory introductory workshop on composting for the general public, teaching basic composting techniques for organic waste reduction.
• Ateliers Lombricompostage (Vermicomposting Workshops) Hands-on workshops on worm composting (vermicomposting) for urban residents without outdoor space, organized in partnership with Les Boites Vertes.
• Jardin pédagogique La Crapaudine (Educational Garden)

Quantifiable outcome

• Nearly 400 shared composting sites deployed across the Nantes Métropole

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Six partnerships are on record, tiered core and minor.

• ADEME (Agence de la transition écologique)coreStrategic or Co-development PartnerCompostri's training programs are aligned with ADEME's PGprox pathway, providing professional non-certifying training for composting professionals that follows national standards established by the environmental transition agency.
• Réseau Compost Citoyen (RCC)coreStrategic or Co-development PartnerCompostri participates in the national Réseau Compost Citoyen network, contributing to shared educational resources, best practices guides, and the annual 'Tous au Compost' national event coordinated by RCC.
• Nantes MétropolecoreStrategic or Co-development PartnerMain municipal partner for deploying shared composting infrastructure across the metropolitan area, enabling Compostri to install and manage composting sites throughout the region.
• BricolowtechminorStrategic or Co-development PartnerLocal neighborhood association focused on sharing economy and low-tech solutions. Partners on Bokashi experiments, shared workshops at the Crapaudine garden, and community outreach activities.
• SuezminorImplementation/ SI/ Consulting PartnerCompostri provides composting training services to Suez employees, training referents at their facilities in composting best practices.
• Les Boites VertesminorStrategic or Co-development PartnerExternal organization providing vermicomposting (lombricompostage) workshops that complement Compostri's composting services. Collaborates on educational content about worm composting.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Regional players

• Bricolowtech: Local Nantes-area association focused on low-tech and sharing-economy projects. Partners with Compostri on bokashi experiments and shared workshops, making it a peer in the community environmental-engagement space at a hyper-local level.

Others

• ADEME: France's ecological transition agency that funds and standardizes composting and waste-prevention programs, including the PGprox pathway that aligns with Compostri's training. Acts as a regulator, funder, and standards body rather than a direct operator.

Direct peers

• Alcor: French designer and installer of urban composting equipment (lombricomposteurs, composteurs de quartier) for individuals, businesses, and municipalities. Comparable as a provider of physical composting infrastructure in French urban settings.
• Les Alchimistes: French for-profit social enterprise operating urban micro-composting sites in multiple French cities, including collective composting for residents and businesses. Closely mirrors Compostri's site-deployment model but with multi-city reach and venture-style growth.
• Moulinot: Paris-based company collecting organic waste from urban producers (restaurants, markets) and composting it locally. Comparable in addressing the urban organic-waste problem through decentralized composting infrastructure, though it focuses on B2B collection.
• Réseau Compost Citoyen: National federation of collective composting associations in France, of which Compostri is a member. It coordinates shared standards, training pathways, and the 'Tous au Compost' event, making it the closest direct counterpart at a federated national level.

Broad incumbents

• Veolia: One of the world's largest environmental services groups with extensive French operations in waste collection, treatment, and organics processing. Represents a broad incumbent competing for municipal biowaste contracts that are adjacent to Compostri's niche.
• Suez: Global waste management and water services major with significant French operations, including organic waste processing. Already a customer of Compostri for training; competes in the broader biowaste value chain and could vertically integrate similar services.

Emerging players

• Le Compagnon du Compost: French operator of collective and shared composting sites with a focus on community engagement and training. Comparable in mission and community-led approach to Compostri, though smaller and more recent.
• Les Boîtes Vertes: French social enterprise running vermicomposting workshops and urban composting services. Partially overlaps with Compostri's lombricompostage workshops and educational programming, and is referenced as a direct partner.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/compostri
• LinkedInlinkedin.com/company/compostri

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 COMPOSTRI