The right plan for every US team.

Plans scale with your team size, project volume and deployment needs. Whether you run feasibility studies, size data center microgrids or plan federal energy systems, tell us where you're at and we'll point you to the right one.

For the cost of a consulting day or two a month, free up 3 to 5 days of engineering time per project.

Essential

For focused feasibility studies and early-stage energy concepts.

Includes:

  • 3 active projects
  • Core benchmark library
  • Scenario modelling
  • In-app reports (printable)
  • Email support
Start with focused planning
Start your evaluation

Professional

For teams delivering energy concepts to clients across multiple projects.

Everything in Essential, and:

  • Unlimited projects
  • Full benchmark library
  • Collaboration tools
  • API access
  • Priority support
Tailored to your team size
Book a live demo

Enterprise

For utilities, public energy bodies, and organisations running multi-project planning programmes.

Everything in Professional, and:

  • Dedicated onboarding and success support
  • Custom integrations
  • White-label reports
  • Data residency and security review
  • Procurement and SLA support
Built around your organisation
Talk to our team
Not sure where you land? Book a demo and we'll match you to the right plan.
Selected results from real projects
−25%
IWB · Port of Switzerland

Cost reduction vs status quo across 16 PV and energy-sharing scenarios.
83%
Yverdon-les-Bains

CO₂ reduction by 2040, mapped across three scenarios for a new eco-quartier.
80%+
Primeo Energie

Renewable heat target verified across optimal district heating expansion scenarios.
Planning savings

Estimate the planning capacity Sympheny can give back.

Set the inputs to your team's project volume and US cost structure. The estimate runs in dollars against your internal consulting cost, so you can take it into a budget conversation. Results are directional, to support an internal business case.

Planning Savings Estimator
Estimate the planning capacity Sympheny can give back
Adjust the inputs to reflect your team's project volume and cost structure. Results are directional, intended to support internal business-case discussions.
Energy concepts delivered per year10
Feasibility studies, district concepts, campus analyses, city-wide strategies
Hours per concept today (manual workflow)120 hrs
Data preparation through scenario analysis to client report. Typical district concept: 80–200 hrs.
Fully-loaded internal cost per engineer hourCHF 95 /hr
Salary + overhead. Swiss engineering consultant: ~CHF 77–100/hr internal cost.
Client billing rateCHF 175 /hr
Swiss engineering firms typically bill CHF 140–220/hr for energy specialists.
Expected time reduction per concept
Based on reported Sympheny customer outcomes across the full planning workflow. Conservative (40%) is more typical in the first year of use; Typical (60%) reflects established teams; High-impact (75%) matches the Solar Impulse Foundation independent benchmark.
Estimated hours freed per year
720
hours freed per year
Equivalent to CHF 68k of internal planning capacity
Value of time freed
CHF 68k
Internal capacity at fully-loaded cost
Capacity for additional client work
CHF 126k
If freed hours are directed to new projects
Extra concepts your team can deliver
15
With the same team and time budget
At this project volume, the estimated value of time saved can exceed Sympheny's annual licence cost within the first project.
How this is calculated
Concepts per year10
Hours per concept (today)120 hrs
Total hours per year (today)1,200 hrs
Time reduction assumption60% (Typical)
Hours freed per year720 hrs
Value of time freedCHF 68,400
Capacity for additional client workCHF 126,000
Formulas usedConcepts per year × hours per concept × time reduction = hours freed
Hours freed × internal cost rate = value of time freed
Hours freed × billing rate = capacity for additional client work
Want to make these numbers concrete?
Send us your project mix and rates and we'll work through a grounded estimate for your team, not a slider.
Your current estimate is sent along automatically.
We'll only use this to prepare your estimate and get in touch.
These estimates are directional and intended to support internal business-case discussions. Actual savings depend on project complexity, data availability, workflow and team adoption. Time reduction benchmarks are based on reported Sympheny customer outcomes; the 75% figure is consistent with the Solar Impulse Foundation independent impact assessment. US internal cost benchmarks are based on published 2025 US salary data for energy-sector professionals. USD license threshold: $22,400/year. Other currencies are shown for cross-geography comparison.

Prefer to talk it through live? Start a free trial · Book a demo

Built for procurement

Security, privacy, and procurement readiness

Sympheny is a Swiss company built around European data protection standards. Here's what your security, IT, and procurement teams typically want to know upfront.

EU-hosted by default

Project data is hosted on Microsoft Azure (Switzerland and the EU) and AWS in Stockholm, Sweden. Customer relationship data is managed in Salesforce, hosted in Frankfurt, Germany.

Data residency options

Enterprise customers can specify data residency requirements, including US deployment, and we'll work through the options with you during procurement.

Customer data remains yours

We don't resell, archive, or repurpose your project data. After cancellation, data is exported and then deleted in line with GDPR.

GDPR and Swiss data protection alignment

Fully GDPR compliant and aligned with the Swiss Federal Act on Data Protection (nDSG). Payments handled by certified third-party processors.

Transparent sub-processors

We publish the sub-processors involved in delivering Sympheny so your team can review them as part of any vendor assessment.

No customer data trains our AI

MILP optimisation is deterministic. No AI in the calculations. ML forecasting is opt-in. Either way, your project data never trains any model, ours or anyone else's.

Download security overview (PDF) Read the Privacy Policy → View sub-processors → AI & data transparency → Review GTC →

Frequently asked questions

How long does it take to get value from Sympheny?
If you've worked with optimisation or energy-system modelling before, you'll have a solid grip on Sympheny in under a week. Once your workflows are set, most studies take around 30 minutes to build. New users usually pick up the basics after a 1-hour onboarding and a few hours of practice: generating demand and PV profiles, sizing a PV-plus-battery system from an example, and comparing scenarios.
Do all users need to be optimisation experts?
No. Most organisations run Sympheny with one expert user and a handful of occasional ones. The expert takes on the advanced modelling questions. Everyone else runs simpler, repeatable workflows, with backup from internal specialists and our team when they need it.
How does the evaluation process work?
Most teams start with a scoped, guided evaluation on one of their real projects. We set up the platform with you, configure the inputs to your context, and run a representative scenario together. By the end you have a concrete result and a clear sense of whether Sympheny fits, before you commit to anything. If you need more time on the pilot, we can extend it.
Can I switch plans later?
Yes. You can move up or down as your needs change, and your Sympheny contact will handle the switch with you.
Where is our data hosted? Are you GDPR compliant?
Yes, we're fully GDPR compliant. Project data sits on Microsoft Azure (Switzerland and the EU) and Amazon Web Services (AWS) in Stockholm, Sweden; customer relationship data sits in Salesforce in Frankfurt, Germany. All are inside Switzerland and the EU. We never store credit card details ourselves; certified third-party processors handle all payments. As a Swiss company, we also comply fully with the Swiss Federal Act on Data Protection (nDSG). If you have specific data residency requirements, get in touch and we'll walk through the options.
Is Sympheny certified Swiss Made Software?
Yes. Sympheny carries the official Swiss Made Software certification, which means it's developed, maintained, and supported in Switzerland. We're also a spin-off of Empa, part of the ETH Domain, with 10+ years of research behind our optimisation engine. If your procurement process needs Swiss software credentials, we'll provide the documentation.
What happens to our data if we cancel?
After you cancel, your data stays accessible during an export window. Contact us for the exact terms. Once that window closes, we permanently delete it from our servers, as GDPR requires. We never retain, resell, or archive your project data.
Do you offer special terms for educational institutions?
Yes, we have a dedicated programme for universities, research groups, and individual students.
What happens if I go over my project limit on the Essential plan?
If you need more than 3 projects, you'll need to upgrade to the Professional plan. Your existing projects will remain accessible.

Ready to deliver energy concepts faster, with more scenarios and clearer trade-offs?

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