Greencityzen
Greencityzen designs and operates HummBox IoT sensor fleets and a cloud platform for environmental monitoring, serving municipalities, water utilities, agricultural operations, and NGOs across Europe and emerging markets.
- Company typePrivate
- Founded2016
- HeadquartersMarseille, France
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Greencityzen does
Greencityzen is a French industrial IoT company headquartered in Marseille that designs, manufactures, and operates connected environmental sensor fleets under the HummBox brand. The platform combines low-power sensors (level, pressure, soil moisture, weather, H2S, rain, pulse, dry contact) communicating over Sigfox or LoRa with a cloud IoT platform that performs data cleaning, aggregation, alerting, and basic predictive analytics, surfaced through web/mobile dashboards and a REST API. The company's primary customers are municipalities and water utilities, including reference deployments such as 5,000+ level sensors in Marseille storm drains (SERAMM/SUEZ), smart watering for the City of Firenze, and remote supervision of 300+ water kiosks in Cambodia for 1001 fontaines, with secondary exposure to Agritech and Smart Building verticals. Greencityzen monetizes through three channels: hardware sales of HummBox devices, subscription SaaS (Basic and Premium tiers), and bundled Device-as-a-Service offerings that include connectivity and platform access. The company sells primarily through direct enterprise field sales supplemented by system integrator partners (notably AXIANS) and strategic alliances with tier-1 water players including Veolia, SUEZ, and SAUR. Following 2019 private-investor funding and a 2024 integration into the Simpliciti group, Greencityzen operates as a privately held SAS domiciled in France.
Greencityzen firmographics
Firmographics- Name
- Greencityzen
- Legal name
- SAS Greencityzen
- Website
- https://greencityzen.fr
- Company type
- Private
- Founded year
- 2016
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Greencityzen designs and operates HummBox IoT sensor fleets and a cloud platform for environmental monitoring, serving municipalities, water utilities, agricultural operations, and NGOs across Europe and emerging markets.
- Ownership category
- akta.pro rank
Greencityzen industry classification
Industry- Product category
- Smart City IoT Solutions
- NAICS
- Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Totalizing Fluid Meter and Counting Device Manufacturing (334514), Water Supply and Irrigation Systems (22131)
- SIC
- Totalizing Fluid Meters & Counting Devices (3824), Computer Communications Equipment (3576), Water Supply (4941)
- akta.pro primary industry
- Network Monitoring & Smart Water Sensors (Pressure/Flow/Noise Loggers, IoT) (EUANAKAB)
- akta.pro secondary industries
- Continuous/Remote Monitoring Systems (IoT Sensors, Telemetry, Networks) (EUAHACAL), Waste Management & Smart Sanitation (Facilities) (HSAPAPAM), Water & Wastewater Utility IoT (SCADA, Leak/Quality Monitoring) (EUADAPAK), Multi-Sensor Environmental Monitoring Hubs & Smart Home Integrations (HSAHAGAJ), Smart Climate & Air Quality (Thermostats, HVAC, Purifiers, IAQ Sensors) (HSAPAQAD)
Keywords
Where Greencityzen is headquartered
LocationHeadquarters
- HQ city
- Marseille
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Greencityzen business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Personnel, Infrastructure, Marketing or Sales, Operations
Revenue model
- IoT Hardware (HummBox Sensors): Sale of connected environmental sensors including level, pressure, soil, weather, H2S, and other specialized sensors. Devices are sold as part of device-as-a-service packages including connectivity.
- Software as a Service (SaaS): IoT platform and applications offered as software-as-a-service with Basic and Premium tiers. Includes dashboard, device management, alerts, API access, and predictive analytics capabilities.
- Device as a Service: Combined hardware and connectivity offering with platform access. Includes level monitoring sensor plus Sigfox/Lora connectivity bundled with IoT platform and apps.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Basic tier includes platform access through REST API with data shaping and cleaning, basic application with raw data visualization, history, manual threshold alerts, and email/SMS notifications. |
| Subscription | Monthly | Premium tier includes advanced business rules, prediction analysis, incident detection, dashboards with KPIs and advanced charts, packaged alerts, predictive map, assets management, activity log, worldwide weather service, and custom application hosting. |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Greencityzen product offering
Product offeringCore offering
Greencityzen designs, manufactures, and sells the HummBox line of connected IoT sensors for environmental monitoring (level, pressure, soil moisture, weather, rain, H2S, dry contact, pulse, electrovalve) that communicate via Sigfox or LoRa networks and are managed through a cloud-based IoT platform with real-time dashboards, alerting, REST APIs, and predictive analytics. The company sells hardware, subscription SaaS tiers (Basic and Premium), and Device-as-a-Service bundles targeting municipalities, water utilities, agricultural operators, smart building operators, and NGOs.
Product overview
Greencityzen offers a comprehensive IoT solution portfolio centered on the HummBox product line for environmental monitoring in smart cities and industry. The offering comprises over 12 distinct connected sensors (level, pressure, weather, air quality, H2S, and control devices) that communicate via Sigfox or LoRa networks, all connected to a cloud-based IoT platform providing real-time dashboards, KPIs, alerting, and device management. Solutions span rain network monitoring, sewer network monitoring, drinking water access, smart watering, tank monitoring, and frost alert applications. The platform delivers data-as-a-service from sensor to dashboard with two service tiers: Basic (API access, raw data visualization, manual alerts) and Premium (advanced KPIs, predictive maps, asset management, custom applications).
Differentiator
Problem solved
Functional benefit
Brands
- HummBox: IoT sensor product line including level sensors, pressure sensors, weather stations, rain gauges, and environmental monitoring devices for water networks, sewer monitoring, and smart city applications.
Products and services
- HummBox Level Ultrasonic Connected ultrasonic level sensor for measuring liquid levels in tanks, drains, and sewer networks with distance range 20cm to 665cm, 1mm resolution, IP68 protection, battery power, and Sigfox or LoRa connectivity.
- HummBox Level Pressure Connected pressure/piezo sensor for groundwater level monitoring and liquid level measurement in challenging environments.
- HummBox Network Pressure Sensor Connected network pressure sensor for monitoring pressure in water distribution networks to detect leaks and pressure anomalies.
- HummBox Soil Weather Connected soil temperature and humidity sensor for vegetation monitoring, smart irrigation optimization, and urban heat island studies.
- HummBox Weather Station Connected weather station providing comprehensive meteorological data including temperature, humidity, rainfall, and wind speed for environmental monitoring.
- HummBox Rain Gauge Connected pluviometer sensor for measuring rainfall intensity and accumulation, used in rain network monitoring and combined sewer overflow detection.
- HummBox Air Outdoor Connected outdoor temperature and humidity sensor for environmental air quality monitoring and indoor workplace conditions.
- HummBox Temperature Standalone connected temperature sensor for frost alert systems and temperature monitoring in various environments.
- HummBox H2S ppb/ppm Connected hydrogen sulfide sensor for monitoring odor nuisance and H2S levels in sewer networks and wastewater treatment plants, available in PPB and PPM sensitivity ranges.
- HummBox Dry Contact Connected dry contact sensor for monitoring binary state changes in industrial equipment, gates, and other switching devices.
- HummBox Pulse Connected pulse counter sensor for metering water consumption, flow monitoring, and utility billing applications.
- IoT Platform & Dashboard Cloud-based IoT platform offering real-time dashboards, interactive charts, zoomable timeline, KPI calculation (flows, clogging speed, active surface), prediction display, map-based visualization, alerting, REST API access, and device/fleet management. Available in Basic and Premium subscription tiers.
- Smart Watering Solution Smart irrigation solution for public green spaces combining soil moisture and weather data with HummBox sensors and the IoT platform to optimize watering schedules and reduce water consumption by up to 35%.
Quantifiable outcome
- 35% water savings in smart watering applications
- +5 more outcomes
Companies that use Greencityzen
Customer profileNamed customers8 records
Segments4 records
Ideal customer profiles4 records
Greencityzen technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
Feature5 records
Greencityzen partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core, flagship and minor.
- Simpliciti GroupcoreGreencityzen became part of the Simpliciti group to maximize its impact. This acquisition/merger positions the company within a larger group focused on similar environmental and IoT objectives.
- VeoliaflagshipStrategic partnership for smart city IoT solutions in water management for green spaces. Companies co-exhibit at industry events (Innovative City show) and collaborate on municipal deployments.
- AXIANScoreTechnology integration partner for smart watering solutions. AXIANS installed the Smart Watering solution in Florence, Italy as part of the city's smart city project.
- EurecomminorResearch collaboration with Eurecom (with Kim Hung from GreenCityZen and Christian Bonnet) to create a novel Industrial IoT framework with fast connector generator, connector management, and scalability support.
- 1001 fontainescorePartnership to empower 1001 fontaines operations teams with IoT solutions for remote supervision of water kiosks in Cambodia, contributing to UN SDG 6.1 for safe drinking water access.
- 1001 fontainescorePartnership to empower 1001 fontaines operations teams with IoT solutions for remote supervision of water kiosks in Cambodia, contributing to UN SDG 6.1 for safe drinking water access.
Scale indicators7 records
Recent moves7 records
Expansion highlights6 records
Greencityzen competitors and assessment
Company assessmentDirect peers
- Libelium: Spanish IoT platform and sensor manufacturer focused on environmental monitoring (water, air quality, agriculture, smart cities). Direct competitor to Greencityzen in environmental IoT, with a comparable end-to-end sensor-to-cloud offering and shared focus on Sigfox/LoRa-based deployments.
- Kamstrup: Danish manufacturer of smart metering solutions for water, heat, and electricity with strong European utility presence. Highly comparable to Greencityzen on the water/heat/IoT metering side, with similar target customers (utilities and municipalities) and analogous hardware-plus-software business model.
- Birdz (Veolia): Veolia-owned specialist in smart water metering and IoT for utilities, providing connected meters and environmental monitoring at scale. Direct competitor and sister subsidiary via Veolia's strategic relationship with Greencityzen, targeting the same water-utility and smart-city customers with overlapping sensor and SaaS offerings.
Emerging players
- Arable Labs: Agriculture-focused IoT and analytics provider deploying connected weather, soil, and crop sensors. Comparable to Greencityzen's Agritech and smart-watering vertical (HummBox Soil Weather, Smart Watering) with a similar SaaS+hardware model aimed at irrigation optimization and field analytics.
- StormSensor: US-based IoT company specializing in real-time sewer and storm-water monitoring for municipalities. Closely comparable to Greencityzen's sewer network and combined-sewer overflow use cases, with a similar hardware-plus-software GTM targeting city public-works departments.
Others
- Axians (VINCI Energies): VINCI Energies ICT brand and global systems integrator that delivers smart-city, IoT, and utility digital infrastructure projects — including the Florence smart-watering deployment alongside Greencityzen. Acts as both a key channel partner and a potential integrator-led competitor in the smart-water and smart-city space.
Broad incumbents
- ENGIE Solutions: Major energy and multi-technical services provider with smart-city, smart-building, and environmental monitoring offerings across Europe. Overlaps with Greencityzen in smart-building IAQ and municipal environmental monitoring, but as part of a much broader services portfolio.
- SUEZ Smart Solutions: Global water and waste services giant with an expanding portfolio of digital, smart-water, and IoT solutions for utilities and municipalities. SUEZ is both a reference customer (via SERAMM) and a potential competitor, offering end-to-end digital water management at significantly larger scale than Greencityzen.
- Xylem (Sensus): Global water technology company with a strong smart-water and AMI portfolio (including the Sensus brand) for utilities and cities. Xylem competes across the same smart-water and network-monitoring applications that Greencityzen addresses, but at much greater scale and with a broader product set.
- Itron: Global leader in smart metering, network connectivity, and utility IoT (water, gas, electric). Itron's connected metering and analytics platform competes directly with Greencityzen's water-network monitoring and SaaS offering, especially for large municipal and utility customers in Europe.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Greencityzen social profiles
Digital presenceGreencityzen financial estimates
Financial estimateRevenue estimate
Valuation estimate
Greencityzen leadership team
Management profileNumber of profiles
Profiles3 records
Greencityzen funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Greencityzen M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Greencityzen
What does Greencityzen do?
Greencityzen designs, manufactures, and sells the HummBox line of connected IoT sensors for environmental monitoring (level, pressure, soil moisture, weather, rain, H2S, dry contact, pulse, electrovalve) that communicate via Sigfox or LoRa networks and are managed through a cloud-based IoT platform with real-time dashboards, alerting, REST APIs, and predictive analytics. The company sells hardware, subscription SaaS tiers (Basic and Premium), and Device-as-a-Service bundles targeting municipalities, water utilities, agricultural operators, smart building operators, and NGOs.
Is Greencityzen a public or private company?
Greencityzen is a private company. It is classified as corporate owned and is currently operating.
When was Greencityzen founded?
Greencityzen was founded in 2016. It employs 11 to 50 people.
Where is Greencityzen based?
Greencityzen is headquartered in Marseille, France, in the Europe region.
How does Greencityzen make money?
Three revenue lines are on record. IoT Hardware (HummBox Sensors) is the primary driver. The others are software as a Service (SaaS) and device as a Service.
Who are Greencityzen's main competitors?
Direct peers on record are Libelium, Kamstrup and Birdz (Veolia). Emerging players are Arable Labs and StormSensor. Axians (VINCI Energies) is listed as an others. Broad incumbents are ENGIE Solutions, SUEZ Smart Solutions, Xylem (Sensus) and Itron.
Does Greencityzen have an API?
Yes. REST API for data access enabling integration of sensor data into customer information systems. Platform provides data cleaning, data shaping, and data aggregation through the API. Developer documentation is at www.greencityzen.fr/platform-apps.
What industry is Greencityzen in?
Greencityzen's product category is Smart City IoT Solutions. Its primary akta.pro industry code is EUANAKAB, Network Monitoring & Smart Water Sensors (Pressure/Flow/Noise Loggers, IoT), with a secondary code of EUAHACAL, Continuous/Remote Monitoring Systems (IoT Sensors, Telemetry, Networks). Its NAICS code is 334512 and its SIC code is 3824.