Steadysun

What Steadysun does

Steadysun, founded in 2013 as a spin-out of CEA and INES, provides AI-enhanced solar and wind power forecasting delivered through the SteadyWeb SaaS platform and a REST API. The company's core technology combines a 20+ model numerical weather prediction ensemble (Steadymet) with real-time satellite nowcasting from five geostationary satellites (Steadysat), applying machine-learning-driven model weighting and 11-quantile probabilistic outputs to produce forecasts at horizons ranging from minutes to 16 days. A WRF regional model supports up to 1km resolution for microclimate-sensitive sites. Product surface includes Solar Energy Forecasting, Wind Energy Forecasting, Real-Time Irradiance and PV Production Data, and Hindcast historical simulation; these are delivered as four subscription tiers (Starter+ at €18/site/month, Advanced+ at €54, Expert+ at €123, and custom-priced Enterprise+).

The company operates a hybrid go-to-market combining product-led growth — a fully self-serve signup, 30-day Expert+ trial, usage-based 'forecast point' pricing, and volume discounts — with an enterprise overlay providing dedicated account management and custom WRF modeling. Customers span European utilities and grid operators (RTE, Red Eléctrica, EDF Renewables, ENGIE Green), meteorological services (Météo France), Middle East and Pacific renewables developers (ACWA Power, JUWI, Enercal, EDT ENGIE Tahiti), automotive OEMs (Honda), and a self-serve SMB tail totaling 14,000+ sites across 25+ countries. Steadysun is a registered trademark of QUOS Group (headquartered in Grenoble), with operational offices in Le Bourget-du-Lac, France.

The business model is asset-light SaaS with multi-year revenue expansion mechanics through tier upgrades (Starter+ → Advanced+ → Expert+ → Enterprise+), site-count growth within existing accounts, and upsell of hindcast and high-resolution WRF modules. Reported operational scale includes a 20 GWp forecast portfolio, 1,000+ active users by September 2025, and a 2023 Top-Rated Accuracy recognition in independent solar forecasting benchmarks. Founder Xavier Le Pivert serves as President; the company is privately held under QUOS Group with no external venture funding disclosed.

Name

Steadysun

Legal name

Steadysun (registered trademark of QUOS Group)

Website

https://steady-sun.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Short description

Steadysun provides AI-enhanced solar and wind power forecasting via a multi-model ensemble combining 20+ weather models and satellite data, serving renewable energy producers, grid operators, traders, and project developers across 80+ countries through a tiered SaaS platform and API.

Ownership category

akta.pro rank

Product category

Renewable Energy Forecasting Software

NAICS

Computer Systems Design and Related Services (5415), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)

SIC

Services-Prepackaged Software (7372), Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Commissioning, Testing & Field Services for Interconnection (Energization, Acceptance Tests) (EUAMAIAJ)

akta.pro secondary industry

Forecasting & AI Optimization for Flexibility (Load/Price/Renewables/SoC) (EUAFAKAH)

Keywords

• Solar power forecasting
• Wind power forecasting
• Renewable energy forecasting
• Solar irradiance monitoring
• Energy weather data

Headquarters

HQ city

Le Bourget-du-lac

HQ country

France

HQ region

Europe

Offices2 records

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 (API + Web Platform): Subscription-based access to forecasting platform (SteadyWeb) and API. Four tiers: Starter+ (€18/site/month), Advanced+ (€54/site/month), Expert+ (€123/site/month), Enterprise+ (custom pricing). Volume discounts applied as site count increases. Annual plans offer 2 months free savings.
2. Usage-Based Pricing: Usage-based pricing model where customers pay only for the forecast points they need. 'Point-based pricing for unmatched economic flexibility' - subscription tailored to actual scale of needs.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels10 records

Core offering

Steadysun provides software-based solar and wind power production forecasting, real-time solar irradiance monitoring, and historical hindcast data for renewable energy operators. Its core offering is a multi-model forecasting SaaS (SteadyWeb) that combines 20+ numerical weather prediction models with data from 5 geostationary satellites and AI-driven model weighting, delivering probabilistic forecasts with 11 quantiles from minutes up to 16 days ahead via API, SFTP, CSV, and a web interface.

Product overview

Steadysun offers a unified platform-plus-modules product architecture centered on solar and wind energy forecasting. The core platform is SteadyWeb, which provides visualization, portfolio management, and API access. Two key technology modules power the forecasts: Steadymet (day-ahead multi-model NWP approach covering 15 days) and Steadysat (intraday satellite nowcasting covering up to 6 hours). These technologies feed into four main products: Solar Energy Forecasting, Wind Energy Forecasting, Real-Time Irradiance Data, and Hindcast Historical Data. Four subscription tiers (Starter+, Advanced+, Expert+, Enterprise+) provide graduated access to features, with Expert+ including both Steadymet and Steadysat integration for complete coverage.

Differentiator

Problem solved

Functional benefit

Products and services

• Solar Energy Forecasting Photovoltaic production forecasting product that anticipates solar PV generation using a multi-model approach combining 20+ numerical weather prediction models with AI-powered cross-model analysis, delivering probabilistic forecasts from minutes to 15 days ahead with 11 quantiles for solar farm operators, energy traders and grid integrators.
• Wind Energy Forecasting Ultra-accurate wind power generation forecasting product that integrates over 20 leading weather models with confidence intervals, providing forecasts from hours to 16 days ahead for onshore and offshore wind farm operators, energy traders and grid operators.
• SteadyWeb Platform Comprehensive web-based SaaS platform that provides access to all Steadysun forecasting services, with real-time monitoring, portfolio management, visualization dashboards, performance analytics, subscription management, and 24/7 self-serve account management; exposes the same forecasts via REST API, SFTP, CSV and SMTP.
• Real-Time Irradiance and PV Production Data Live solar irradiance monitoring product that uses satellite imagery from 5 geostationary satellites combined with meteorological models to deliver real-time GHI, DNI, DHI and GTI data every 5–15 minutes at 500m–2km resolution, with PV power modeling including panel layout, shading analysis, and system losses.
• Hindcast Data Historical weather and power forecast simulation service that applies current forecasting models to historical weather patterns at specific project sites, covering historical periods from 1940 to 2018, enabling financial model validation, revenue optimization strategy, and EMS/BESS configuration analysis for renewable project developers and operators.
• Steadymet Day-ahead and intraday power forecasting technology combining over 20 established international meteorological models (NWP) with AI-powered cross-model weather analysis, delivering forecasts up to 15 days ahead with 11 quantiles for uncertainty measurement and a WRF regional model at up to 1km resolution for microclimate accuracy.
• Steadysat Real-time satellite imagery technology that leverages data from 5 geostationary satellites (NOAA GOES-W, GOES-E; EUMETSAT MSG-0°, MSG-IODC; JMA HIMAWARI) to provide live solar irradiance and PV production forecasts up to 6 hours ahead with 5–15 minute update frequency at 0.5–3km resolution globally.

Quantifiable outcome

• Reduced grid code penalties by 50% and PV production losses from curtailment by 75%
• +2 more outcomes

Named customers14 records

Segments8 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability5 records

Feature7 records

Partnerships

15 partnerships are on record, tiered core and minor.

• CEA (Commissariat à l'énergie atomique et aux énergies alternatives)coreStrategic or Co-development PartnerCEA is the French Alternative Energies and Atomic Energy Commission. Steadysun originated from CEA in 2013, leveraging its scientific excellence and rigorous approach to applied research. Collaborations with CEA laboratories allow Steadysun to remain at the forefront of innovation in renewable energy forecasting.
• INES (Institut National de l'Energie Solaire)coreStrategic or Co-development PartnerINES is the French National Solar Energy Institute. Steadysun emerged from INES in 2013, gaining incomparable technical expertise in solar energy. Ongoing collaborations with INES enable continued innovation in solar forecasting technology.
• NOAA (National Oceanic and Atmospheric Administration)coreTechnology or IntegrationNOAA operates geostationary weather satellites (GOES-W, GOES-E) that provide real-time imagery data for Steadysat's intraday solar forecasting technology. These satellites deliver critical cloud cover and atmospheric data for solar irradiance predictions.
• EUMETSAT (European Organisation for the Exploitation of Satellite Systems)coreTechnology or IntegrationEUMETSAT operates Meteosat satellites (MSG-0°, MSG-IODC) providing continuous imagery over Europe, Africa, and Indian Ocean. Data feeds into Steadysat for real-time solar irradiance and cloud movement analysis.
• JMA (Japan Meteorological Agency)coreTechnology or IntegrationJMA operates the HIMAWARI geostationary satellite providing coverage over Asia and Oceania. Satellite data enables Steadysat's global coverage for solar forecasting across the Asia-Pacific region.
• ESA (European Space Agency)minorStrategic or Co-development PartnerEuropean Space Agency partnership for space-based observation and satellite data applications in renewable energy forecasting.
• CNES (Centre National d'Études Spatiales)minorStrategic or Co-development PartnerFrench National Centre for Space Studies partnership for space technologies applied to renewable energy forecasting.
• ECMWF (European Centre for Medium-Range Weather Forecasts)coreTechnology or IntegrationECMWF provides meteorological data including Copernicus Atmosphere Monitoring Service (CAMS) global analysis used for atmospheric modeling. Contributes to water vapor, ozone, and aerosol data for solar irradiance calculations.
• ADEME (Agence de la Transition Écologique)minorStrategic or Co-development PartnerFrench Agency for Ecological Transition partnership supporting sustainable energy projects and environmental innovation initiatives.
• IGE (Institut des Géosciences de l'Environnement)minorStrategic or Co-development PartnerEnvironment research institute partnership for advanced environmental modeling and geoscience research applications in renewable energy forecasting.
• Grenoble INP UGAminorStrategic or Co-development PartnerGrenoble Institute of Technology partnership for academic research, talent development, and innovation in renewable energy and data science.
• EIT InnoEnergyminorStrategic or Co-development PartnerEuropean Institute of Innovation and Technology partnership supporting sustainable energy innovation and market development.
• La Région Auvergne-Rhône-AlpesminorStrategic or Co-development PartnerRegional government partnership supporting innovation ecosystem in the Auvergne-Rhône-Alpes region where Steadysun is based.
• Savoie TechnolacminorStrategic or Co-development PartnerExcellence pole for energy and networks at Savoie Technolac technology park, supporting renewable energy innovation companies.
• ANR (Agence Nationale de la Recherche)minorStrategic or Co-development PartnerFrench National Research Agency partnership supporting scientific research projects and innovation in renewable energy.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Vortex (Vortex FDC): Spain-based provider of meteorological and power production forecasts for wind and solar assets. Direct competitor to Steadysun in European renewable forecasting, with overlapping customers (utilities, developers, traders) and similar multi-model NWP and downscaling approach.
• Solargis: Slovakia-based solar resource and forecasting data provider serving PV project developers, operators, and traders. Closely comparable product offering (solar irradiance and PV power forecasts) and similar global customer base in the utility-scale solar market.
• Reuniwatt: French solar irradiance forecasting and sky-imaging company. Headquartered in France with similar roots in renewable energy research; competes directly with Steadysat-style intraday satellite/cloud nowcasting for solar operators and grid managers.
• Meteocontrol: German provider of solar PV monitoring, yield forecasts, and grid integration services for utility-scale solar. Direct competitor in European PV forecasting and asset management, particularly for IPPs and developers.

Broad incumbents

• DNV (Energy Systems / Solar): Global energy advisory and software provider with solar/wind resource assessment and forecasting services as part of a broader portfolio (certification, due diligence, market intelligence). Overlaps with Steadysun's hindcast/forecasting offering for project developers and lenders.
• Schneider Electric (EcoStruxure / Resource Advisor): Large industrial software and energy management vendor with renewable energy forecasting embedded in its EcoStruxure and Resource Advisor platforms. Competitor via bundling rather than standalone product, but addresses the same utility/developer/operator buyers.
• DTN (Weather & Climate): US-based weather, climate, and agricultural data provider with renewable energy forecasting and operations services. Overlaps with Steadysun's forecasting use cases for wind/solar operators and traders, particularly in North America.
• IBM Environmental Intelligence Suite: IBM's weather and environmental data platform includes renewable energy forecasting powered by its acquired The Weather Company assets. Comparable in addressing utility-scale solar/wind forecasting and grid integration use cases for large enterprise customers.

Emerging players

• Tomorrow.io: Weather intelligence platform combining proprietary radar/satellite data with ML for industry-specific forecasts, including energy. An emerging challenger in the weather-as-a-service market, with growing overlap in renewable forecasting and grid/asset use cases.

Others

• OpenWeatherMap (with energy APIs): Data infrastructure provider offering weather data and APIs that downstream developers use to build custom forecasting solutions. Represents the open/commodity data layer that could in the future enable in-house forecasting alternatives to Steadysun.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/SteadySun
• YouTubeyoutube.com/@Steadysun_
• LinkedInlinkedin.com/company/steadysun

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Steadysun