One model. Every energy obligation.
Net-zero targets, Energy Strategy revisions, Energiestadt re-certification, spatial energy planning. Sympheny lets you run every scenario in one place, show your work to council and residents, and update it when policy shifts. No new study required.
Full access for two weeks.
Monthly energy flow — supply and demand aggregated month-by-month across the planning horizon.
Trusted by municipal and public energy teams
Used by Swiss cities and public energy planners to deliver räumliche Energieplanung, Energiestadt deliverables, and long-horizon decarbonisation roadmaps.
How Sympheny helps
From targets to a defensible pathway
Move from net-zero ambition to concrete district and city-level supply scenarios with cost, CO₂, and feasibility trade-offs the council can compare.
Built for political and public scrutiny
Sankey, Pareto and dashboard outputs make the trade-offs visible for committees, residents and assessors — so the recommendation holds up in the room, not just on paper.
A planning asset the city owns
The model stays with your team. Re-run scenarios as cantonal rules, energy prices, or development plans change — without going back to a consultant for every revision.
What changes for municipal energy teams
| Process | Before Sympheny | With Sympheny |
|---|---|---|
| From targets to pathways | Net-zero and Energiestadt targets are set, but the concrete routes to hit them are hard to compare side by side | Scenarios link targets to defensible district and city-level supply pathways with visible trade-offs |
| Council and resident-facing reviews | Technical assumptions are hard to explain to non-specialists — the recommendation lives or dies in the meeting | Sankey and Pareto outputs make cost, CO₂ and feasibility trade-offs easy to discuss in council and at public consultations |
| Re-certification and revision cycles | Each new policy, price update, or development plan triggers a new external study | Update assumptions in the model your team owns and re-run scenarios in days, not months |
| Consultant relationship | Eight-month studies, six-figure invoices, and a static PDF that's outdated on delivery | Consultants can work inside the same model — the deliverable is a planning asset the city keeps |
When the council questions the plan, the sensitivity runs are what hold it up.
“Sympheny supports our strategic energy planning in an ideal way. The flexibility is extremely convincing and the sensitivity analysis provides security in finding solutions.”
— Andreas Wirz, Chief Digital Officer, Eicher+Pauli Read the full Yverdon-les-Bains case study →
Public energy planning, proven in the field.
See how cities and public planners have used Sympheny to get from a net-zero target to a roadmap they can put in front of a council and have it survive the questions.
Eco-quartier energy concepts and decarbonisation roadmap
Technical proof: Three scenarios mapped for an eco-quartier and city roadmap
Business outcome: 83% CO2 reduction pathway identified by 2040.
City-wide energy supply strategy toward 2050
Technical proof: 3.2 M m2 energy reference area, three time horizons modelled
Business outcome: CO2-free 2035 supply confirmed at similar life-cycle cost.
Climate-neutral research campus by 2030
Technical proof: 26 buildings across 12 energy hubs modelled
Business outcome: A living campus model that can be updated as the site evolves.
