Sympheny

What Sympheny does

Urban Sympheny AG (Sympheny) is a Winterthur-based SaaS vendor of a cloud-based multi-energy hub optimization platform, commercialized since 2020 as an Empa spin-off built on more than 10 years of ETH Domain research. The core product combines a Gurobi-powered Mixed-Integer Linear Programming (MILP) optimization engine with GIS-enabled digital twin modeling, enabling customers to model electricity, heat, cooling, gas, hydrogen, storage and mobility in a single, hourly-resolution model and compare thousands of technology combinations against life-cycle cost and CO2 emissions via Pareto trade-offs and Sankey energy-flow visualizations. The platform is delivered as annual subscription SaaS through three pricing tiers aligned to engineering consultants, project developers and utilities, supplemented by case-by-case academic access and some joint professional-services engagements for onboarding and scenario analysis.

Sympheny is sold through a hybrid enterprise field-sales and product-led growth motion: free trial and 15-minute demo for evaluation, alongside direct sales targeting complex multi-energy planning projects. The company serves engineering and consulting firms (WSP, Buro Happold, Eicher+Pauli, Amstein+Walthert, Gruner, Elimes, Lauber IWISA), utilities and grid teams (IWB, ewb, Primeo Energie, EWZ), municipal and cantonal agencies (IBC Chur, Yverdon-les-Bains), research institutions (Empa), and real estate / industrial sites (Gossau Commercial Park, Losinger Marazzi), with reference projects including the Port of Switzerland decarbonization, the Empa Dübendorf climate-neutral campus program, district heating expansions and a multi-site green hydrogen study.

The go-to-market relies heavily on Switzerland-origin public-sector and utility credibility, partnership with academic research bodies (ETH Zurich, Empa, ZHAW, HSLU, Berkeley Lab), and a strategic stake held by Swiss utility Industrielle Werke Basel (IWB) since February 2022 alongside Technology Fund and Rockstart backing. Geographic reach spans Switzerland (DE/FR/IT sites), Germany, Netherlands, France, Spain, UK, USA and India through localized websites. Recognition includes the 2025 Watt d'Or Prize from the Swiss Federal Office of Energy, the Solar Impulse Foundation Efficient Solution Label, Swiss Made Software certification, and Empa spin-off status.

Name

Sympheny

Legal name

Urban Sympheny AG

Website

https://sympheny.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

11–50 employees

Short description

Sympheny (Urban Sympheny AG) is a Winterthur-based SaaS vendor of a MILP-powered multi-energy hub optimization platform for engineering consultancies, utilities, municipalities, and real estate and industrial developers planning district, campus, and city-scale decarbonization projects.

Ownership category

akta.pro rank

Product category

Energy System Optimization Software

NAICS

Computer Systems Design and Related Services (54151), Other Computer Related Services (541519)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

VPP Optimization, Forecasting & Dispatch Software (AI/ML, Digital Twins) (EUAFAHAG)

akta.pro secondary industries

Microgrid & Community Energy VPPs (Campus, Military, Remote, Resilience) (EUAFAHAE), Utility-Scale VPPs & Grid Services Aggregation (Capacity, Frequency, Reserves) (EUAFAHAD)

Keywords

• Energy system optimization software
• Multi-energy hub modelling
• District energy planning
• MILP optimization platform
• Decarbonization planning software

Headquarters

HQ city

Winterthur

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Platform Subscription: Cloud-based SaaS platform with three pricing tiers built around how energy planning teams work (consultants, developers, utilities). Annual or multi-year licensing with subscription model. Time-to-value enables most teams to recover license cost after 1-2 projects.
2. Academic/Research Access: Curated academic partnerships arranged case-by-case for teaching, theses and research projects. Working relationship rather than a commercial tier or discounted commercial license.
3. Professional Services: Joint workshops, onboarding support and ongoing collaboration with academic and enterprise partners for model development and scenario analysis.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

Sympheny sells a cloud-based SaaS platform (built on 10+ years of MILP optimization research from Empa and the ETH Domain) that enables engineering firms, utilities, municipalities, and developers to model and optimize multi-energy systems (electricity, heat, cooling, gas, hydrogen, storage, mobility) at district, campus, and city scale. The platform pairs a Gurobi-powered MILP engine with a GIS-enabled digital twin to run thousands of technology combinations in a single optimization and return Pareto cost-vs-CO2 scenarios, Sankey energy flows, and sensitivity analyses at hourly resolution. Pricing is delivered as annual subscriptions in three tiers (consultants, developers/utilities, municipalities), supplemented by professional services and curated academic partnerships.

Product overview

Sympheny is a cloud-based energy planning software platform built by Urban Sympheny AG (an Empa spin-off) for engineering firms, utilities, municipalities, and project developers. The core offering is the Sympheny Platform, which combines Multi-Energy Hub Modelling with a Gurobi-powered MILP Optimisation Engine and GIS-enabled Digital Twin Planning to compare energy supply concepts at district, campus, and city scale. The platform evaluates electricity, heat, cooling, gas, hydrogen, and storage together in a single optimization model, returning Pareto fronts of cost vs. CO₂, Sankey energy flows, and stakeholder-ready exports. A dedicated AI & Data Transparency module documents that optimization is non-AI (deterministic MILP), while statistical clustering and optional ML demand forecasting support data preparation. The platform is offered in three commercial pricing tiers targeting engineering consultants, utilities, and municipalities, and includes specialized planning modules for heat networks/district heating, campus energy concepts, business parks/energy communities, industrial site decarbonisation, anergy/5GDHC networks, data centre waste heat, municipal energy planning, and bid/sales workflows. An Academic & Research Partnership Program provides curated access to academic institutions including ETH Zürich, Empa, ZHAW, HSLU, and Berkeley Lab. Commercial deployment began in 2020 with 70+ customers across Europe and the USA.

Differentiator

Problem solved

Functional benefit

Products and services

• Sympheny Platform Cloud-based multi-energy hub modelling and MILP optimization SaaS platform for engineering firms, utilities, municipalities, and developers; pairs a Gurobi-powered MILP engine with a GIS-enabled digital twin to run thousands of technology combinations in a single optimization and return Pareto cost-vs-CO2 scenarios, Sankey energy flows, and sensitivity analyses at hourly resolution. Annual subscription licensing offered in three tiers (for consultants, for developers/utilities, and for municipalities), with a self-serve free trial available.
• Academic & Research Partnership Program Curated academic and research partnership program that gives universities and research institutions (ETH Zürich, Empa, ZHAW, HSLU, Berkeley Lab) access to the Sympheny platform for teaching, student theses, and joint research projects. Structured as a working relationship rather than a discounted commercial tier.
• Professional Services (Workshops, Onboarding, Collaboration) Joint workshops, onboarding support, and ongoing collaboration engagements delivered alongside the Sympheny Platform subscription for academic and enterprise partners, covering model development and scenario analysis.

Quantifiable outcome

• 5× faster vs manual methods (Solar Impulse Foundation impact assessment)
• +9 more outcomes

Named customers18 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature10 records

Partnerships

Seven partnerships are on record, tiered core and secondary.

• Empa (Swiss Federal Laboratories for Materials Science and Technology)coreStrategic or Co-development PartnerSympheny spun out of Empa (ETH Domain) after 10+ years of energy-optimization research. Ongoing research collaboration and joint projects continue. The Empa Dübendorf campus is a key reference customer. Academic access program connects students and researchers to the platform.
• ETH ZürichcoreStrategic or Co-development PartnerSympheny's methods originated in the ETH Domain. Joint research collaboration continues, and ETH Zürich is referenced as Sympheny's academic research foundation. The platform is used in ETH courses and research projects.
• ZHAW (Zurich University of Applied Sciences)secondaryStrategic or Co-development PartnerUsed in teaching on the CAS for energy systems in climate-neutral districts. Academic partnership for energy systems education.
• HSLU (Lucerne University of Applied Sciences and Arts)secondaryStrategic or Co-development PartnerTeaching and joint projects on real energy systems. Academic partnership supporting energy planning education.
• Berkeley Lab (Lawrence Berkeley National Laboratory)secondaryStrategic or Co-development PartnerResearch collaboration on energy-system optimization. International academic partnership extending Sympheny's research network.
• Gurobi OptimizationcoreTechnology or IntegrationGurobi is the industry-standard MILP solver powering Sympheny's optimization engine. Sympheny uses Gurobi to handle the combinatorial complexity of multi-technology, multi-period energy system design.
• Eicher+PaulisecondaryImplementation/ SI/ Consulting PartnerEngineering and sustainability firm that uses Sympheny as the analytical backbone for municipal and district energy planning projects including Yverdon-les-Bains eco-quartier and Insel-Holligen district.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• HOMER Energy (UL Solutions): HOMER Pro is a long-standing energy system optimization platform for hybrid renewable/microgrid design and distributed energy planning. It is the closest direct competitor to Sympheny in combining optimization with techno-economic modelling for multi-energy systems, particularly for campus, community, and remote sites.
• EnergyPLAN: EnergyPLAN is a widely used tool for designing and analysing national or regional energy systems with high shares of renewable energy, including district heating and sector coupling. It targets the same municipal and utility planning workflows as Sympheny, particularly in Europe.
• IES (Integrated Environmental Solutions): IES Virtual Environment is a building and district-scale performance simulation suite used by engineering consultancies for energy, carbon, and daylight analysis. It competes with Sympheny for the same engineering consulting customers on multi-building, campus, and district energy concept workflows.
• DesignBuilder: DesignBuilder is a building performance simulation tool built on the EnergyPlus engine, widely used by engineering firms for energy and carbon modelling at building and campus scale. It overlaps Sympheny's engineering-consulting segment for early-stage feasibility and concept work.
• TRNSYS: TRNSYS is a transient system simulation environment widely used for district heating/cooling, HVAC, and multi-energy system analysis. It serves the same engineering and research community evaluating combined heat and power, storage, and renewable integration in district energy projects.
• Polysun (Vela Solaris): Polysun is a simulation and design software for solar, heat pump, and combined multi-energy systems used by engineers and planners. It overlaps with Sympheny's planning and sizing modules for buildings, districts, and on-site generation.
• EnergyPRO: EnergyPRO is a commercial tool for combined analysis of heat and power production, district heating, and renewables integration at regional and plant scale. It directly competes with Sympheny for utility-side district energy and CHP planning customers, particularly in Northern Europe.

Broad incumbents

• Siemens Smart Infrastructure: Siemens offers broad energy management, grid, and district energy software across its Smart Infrastructure portfolio, including tools that touch DER planning and grid integration. As a broad incumbent, it competes with Sympheny primarily where utilities want a single-vendor stack rather than a specialized planning tool.
• Schneider Electric (EcoStruxure): Schneider Electric's EcoStruxure platform spans building, energy, and grid management and is sold to many of the same utilities and developers as Sympheny. It is a broad incumbent that competes on integrated operations rather than planning optimization.

Emerging players

• LEAP (Long-range Energy Alternatives Planning): LEAP is a widely adopted integrated energy-environment modelling tool used for national and sub-national energy planning and decarbonization analysis. It overlaps Sympheny's municipal and regional decarbonization roadmap use cases, particularly with public-sector planners.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds5 records

Investors5 records

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 Sympheny