Koumoul

What Koumoul does

Koumoul is a French software company founded in 2017 and headquartered in Saint-Avé, Brittany, that builds open-source tools for data publishing, indexing, visualization, and API exposure. Its core product, Data Fair, is an AGPL-licensed platform that enables organizations to ingest tabular and geographic data, configure interactive visualizations (maps, charts, dashboards, timelines, treemaps, sankey diagrams) without programming, and expose datasets via REST APIs. The platform is built on Node.js/TypeScript, Vue.js, Vuetify, MongoDB, Elasticsearch, and Docker/Kubernetes, hosted exclusively on sovereign French cloud providers (OVHcloud and Scaleway). Notable proprietary components include the VJSF (Vuetify JSON Schema Form) open-source library and a "Concepts" semantic typing layer that automatically enriches data using French reference datasets (SIRENE, INSEE, geographic contours).

Koumoul generates revenue through three streams: SaaS subscriptions (Free Découverte, Pro at €600/year, Business at €2,500/year, plus storage and member extensions), professional services for custom portal deployments and data migrations, and on-premise licensing/support for organizations deploying Data Fair on their own infrastructure. Go-to-market is dual: a product-led growth motion via freemium self-signup, and an enterprise field-sales motion targeting French government departments, intercommunalities, and large organizations requiring dedicated portals and integrations.

The company's customer base is concentrated in the French public sector and large enterprise. Named customers include the Côtes-d'Armor department (Dat'Armor portal aggregating 30 intercommunalities), Groupe La Poste (dataNOVA), Grand Poitiers, the Observatoire de l'Environnement en Bretagne, and Ademe. Operations are supported by 4-5 team members (CEO Nicolas Bonnel, CTO Alban Mouton, Quality Manager Balam Saldana, Developer Baptiste Guerny, Administrative & Communications Assistant Hélène Cabillic) and the company remains bootstrapped with 7,000 EUR share capital, no external funding rounds disclosed. Koumoul also distributes the open-source Data Fair catalog connectors (Airtable, ArcGIS, ODS, SharePoint, SFTP, Grist, Google Cloud Storage, DCAT, Udata/data.gouv.fr) and offers an iframe-embeddable Cadastre mapping application.

Name

Koumoul

Legal name

Koumoul

Website

https://koumoul.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Koumoul builds open-source Data Fair, a SaaS platform for publishing, visualizing, and sharing tabular and geographic data via APIs, serving French government departments, intercommunalities, and large enterprises such as Groupe La Poste and Ademe via subscriptions and professional services.

Ownership category

akta.pro rank

Headquarters

HQ city

Saint-avé

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. SaaS Subscription Plans: Annual subscription model with three tiers (Découverte/free, Pro €600/yr, Business €2,500/yr) providing increasing storage, indexed data, datasets, members, and processing time quotas. Add-on extensions for storage and members are available for Business plan subscribers.
2. Professional Services: Custom implementations, data migration assistance, training, and dedicated portal configurations for enterprise and government clients requiring on-premise deployment or specialized integration.
3. On-Premise / Dedicated Hosting Licensing: Organizations can deploy the open-source Data Fair solution on their own infrastructure, with Koumoul providing expertise and support services for installation and maintenance.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

Koumoul develops and operates Data Fair, an open-source (AGPL) SaaS platform that enables organizations to publish, index, consult, visualize, and share tabular and geographic data via interactive visualizations and REST APIs without technical expertise. Its commercial offerings are built on this core and include a turnkey Open Data Portal solution, a Secure Data Sharing module for internal and partner data exchange, an Interactive Data Visualization suite (maps, charts, dashboards, timelines, treemaps, sankey), the VJSF open-source form-generation library, and curated reference datasets (SIRENE, INSEE, geographic contours).

Product overview

Koumoul offers a platform-plus-modules architecture centered on Data Fair, its open source core platform for data indexing, publishing, and visualization. The primary SaaS offerings include an Open Data Portal for public data sharing, Secure Data Sharing for internal organization use, and Interactive Data Visualizations for charting, mapping, and dashboard creation. Key supporting modules include Catalog Connectors for importing from external platforms (Airtable, ArcGIS, SharePoint, ODS, SFTP, and others), a Processing Module for data transformations and scheduled updates, and a Partners system for cross-organizational data access. The Cadastre Application provides a specialized interactive mapping tool for French cadastre data. Koumoul also contributes VJSF as an open source form generation library.

Differentiator

Problem solved

Functional benefit

Products and services

• Data Fair Open-source core platform for indexing, publishing, and visualizing tabular and geographic data with REST API exposure. Supports unlimited API calls, multiple data formats, data enrichment from reference databases (SIRENE, INSEE, geographic contours), and no-code creation of interactive visualizations and portals. Sold as SaaS subscriptions and as self-hostable AGPL software with optional paid support.
• Portail Open Data SaaS-based open data portal solution enabling organizations (typically French local authorities, departments, intercommunalities, and government agencies) to publish and share data publicly with intuitive interfaces, interactive visualizations, unlimited API access, and automatic data updates. Targets users without technical skills who need to comply with French open-data regulations.
• Partage de données sécurisé (Secure Data Sharing) Internal data sharing solution that lets organizations create data APIs from Excel files, exchange data securely within departments, build partner portals, and develop data culture without programming. Designed for organizations that today rely on duplicated Excel files and need fine-grained access permissions and partner organization controls.
• Visualisations de données interactives (Interactive Data Visualization) Suite of configurable data visualizations including maps, charts, timelines, dashboards, and data stories that can be embedded in external sites via iframe. Requires no programming, supports large datasets, and powers the visualizations used in Data Fair portals (e.g., Groupe La Poste's postal-box map).
• Application Cadastre Specialized interactive mapping application that displays French cadastre data, including parcels, with search functionality, geographic exploration, and GPX download capability for hiking trails. Built on top of Data Fair and serves as a reference implementation of Koumoul's geographic visualization capabilities.
• VJSF (Vuetify JSON Schema Form) Open-source Vue.js/Vuetify library that automatically generates data entry forms from JSON Schema definitions. Supports conditional inputs, external data source dropdowns, and complex layouts (tabs, accordions), and is used internally for application configuration and data collection within Data Fair. Distributed publicly on GitHub as a standalone library.
• Données de référence (Reference Data) Curated reference datasets including the SIRENE business registry, geographic contours, and administrative boundaries. Used by Data Fair's Concepts semantic layer to automatically enrich uploaded datasets (geocoding, business identification, territory mapping) and to enable cross-dataset joins and smart visualization configuration. Accessible via the public opendata.koumoul.com portal and via API.

Quantifiable outcome

• 98% API backward compatibility during migrations, enabling transitions in approximately one week.
• +4 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

AI capability3 records

Feature12 records

Partnerships

Twelve partnerships are on record, tiered integration, core infrastructure, key strategic and core ecosystem.

• SharePoint (Microsoft)integrationTechnology or Integration · 1 January 2025SharePoint connector allows importing data stored in SharePoint into Data Fair spaces, leveraging SharePoint APIs while respecting configured access rights. Files are synchronized securely, preserving structure and metadata, making them immediately exploitable for visualizations and dashboards.
• ArcGIS (Esri)integrationTechnology or Integration · 1 January 2025ArcGIS connector integrates geographic data into Data Fair for exploration in interactive web cartography. Enables display of geographic features such as hiking trails on maps, with GPX download capability from the visualization.
• ODS (OpenDataSoft)integrationTechnology or Integration · 1 January 2025ODS connector enables easy import of open data from OpenDataSoft portals including those of Caisse des Dépôts, Ministry of Economy, Ministry of Budget, and Ameli. Users can select and filter reference datasets (e.g., by territory code) and exploit them directly in Data Fair.
• AirtableintegrationTechnology or Integration · 1 January 2025Airtable connector enables importing data from Airtable bases into Data Fair with automatic updates, extending Koumoul's data ingestion capabilities for hybrid SaaS data sources.
• GristintegrationTechnology or Integration · 1 January 2025Grist connector allows importing data from Grist (la Suite Numérique.gov.fr) into Data Fair with scheduled synchronization, facilitating interoperability with this French government SaaS spreadsheet platform.
• Google Cloud StorageintegrationTechnology or Integration · 1 January 2025Google Cloud Storage connector enables importing data from Google Cloud Storage buckets into Data Fair, providing integration with the broader Google Cloud ecosystem.
• SFTPintegrationTechnology or Integration · 1 January 2025SFTP connector allows secure, encrypted data imports into Data Fair using SSH key or credential authentication. Koumoul provides dedicated landing spaces where files can be deposited securely and automatically imported via the connector.
• DCATintegrationTechnology or Integration · 1 January 2025DCAT (Data Catalog Vocabulary) connector enables interoperability with DCAT-compliant data catalogs, facilitating metadata exchange and dataset discovery across catalog systems.
• Scalewaycore infrastructureTechnology or Integration · 1 January 2024Secondary cloud infrastructure provider alongside OVHcloud. Kubernetes clusters and Docker Swarm environments are deployed on Scaleway for scalability and redundancy, complementing OVHcloud hosting.
• Ademe (Agence de la transition écologique)key strategicStrategic or Co-development Partner · 1 January 2023Ademe uses Koumoul's partner organization system to manage data sharing with waste sector producers (REP - Responsabilité Élargie des Producteurs). Ademe provides datasets on which partners have write access for data updates. Ademe also uses Koumoul for the RGE (Reconnus Garants de l'Environnement) directory, with data format validation connectors for organism qualification.
• data.gouv.frcore ecosystemTechnology or Integration · 1 January 2023Koumoul's platform can export datasets and metadata to data.gouv.fr, France's national open data portal. The Udata connector enables bidirectional data exchange. This integration positions Koumoul as part of France's official open data infrastructure.
• OVHcloudcore infrastructureTechnology or Integration · 1 January 2017Koumoul's platform is hosted exclusively on OVHcloud's French cloud infrastructure, ensuring digital sovereignty and compliance with French data hosting requirements. OVHcloud provides the underlying compute and storage for the distributed infrastructure serving millions of API requests.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Junar: Cloud-based open-data publishing platform designed for governments and cities to publish datasets and APIs. Competes directly for the same municipal and national open-data portal RFPs as Koumoul.
• CKAN: Open-source data management system widely used by governments and research organizations to publish and catalog datasets via APIs. Shares the open-source, public-sector open-data positioning that defines Koumoul's core market.
• Dataverse Project: Open-source research data repository software developed at Harvard, used by academic and research institutions worldwide to publish, share, and cite datasets. Comparable in role to Koumoul's Data Fair for organizations that need to publish structured data with APIs.
• OpenDataSoft: French-headquartered SaaS for open-data portals, APIs, and visualization, with overlapping target customers (French local authorities, public agencies, enterprises) and a near-identical feature set. Koumoul's own platform supports ODS as a third-party connector, underlining the direct competition.
• data.world: Cloud-native data catalog and collaboration platform for publishing, sharing, and governing datasets via APIs. Targets enterprise and public-sector data-publishing use cases that overlap with Koumoul's open-data portal offering.
• DKAN: Drupal-based open-data platform used by US states and agencies to publish open-data portals with APIs and visualizations. Competes for the same public-sector open-data publishing workloads as Koumoul's Data Fair.

Broad incumbents

• Socrata (Tyler Technologies): Long-established open-data and performance-management platform owned by Tyler Technologies, used by large US cities, states, and federal agencies. A much larger incumbent in the same open-data portal category Koumoul targets.
• Alation: Enterprise data catalog and data intelligence platform used by large organizations to discover, govern, and document data assets. Adjacent to Koumoul in data cataloging and metadata management, but at the enterprise governance end of the spectrum.
• ArcGIS Hub (Esri): Esri's open-data portal product bundled with the dominant ArcGIS GIS platform, used heavily by US local governments. Competes for geographic open-data publishing contracts and offers a more integrated geospatial stack than Koumoul.

Others

• Kestra: Open-source data orchestration and workflow platform with strong French roots, often used alongside data-publishing tools to automate ETL/ELT pipelines. Adjacent rather than directly competing, but a typical complement to Koumoul's processing module in customer stacks.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/koumoul_fr
• GitHubgithub.com/koumoul-dev
• Facebookfacebook.com/koumoul56
• LinkedInlinkedin.com/company/koumoul

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 Koumoul