The right plan for every team.

Plans scale with your team size, project volume, and deployment needs. Tell us where you're at and we'll point you to the right one.

For the cost of a consulting day per month, save 3–5 days 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? Message us on WhatsApp 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

What Sympheny gives back to your team.

Teams using Sympheny report cutting manual preparation and scenario-modelling time per concept by more than half. What that is worth depends on your project mix, your team's rates and how many concepts you deliver a year. Rather than guess at Indian benchmarks, we'd rather work through your numbers with you.

60%+

Less time on manual preparation and scenario modelling per concept, based on reported customer outcomes.

3–5 days

Working time typically saved per project across the full planning workflow.

50,000+

Technology combinations evaluated per optimisation run, far beyond what a spreadsheet study can compare.

Talk to us about your numbers

Send us your project mix and team setup on WhatsApp and we'll work through a grounded estimate for your team. Directional, honest, and in your context.

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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 options for Indian enterprises with onshore data policies. We'll work through the specifics 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. As a Swiss company, we also comply with the Swiss Federal Act on Data Protection (nDSG), and we align our handling of personal data with India's Digital Personal Data Protection (DPDP) Act, 2023. If your organisation needs data hosted in India, Enterprise plans can include data-residency options. Get in touch and we'll walk through it.
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. See our Education & Research page.
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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