Sovereign, Transparent, No Vendor Lock-In
Inspect the source, model configuration, and complete workflow. Build reproducible studies whose assumptions and transformations can be reviewed rather than hidden behind a closed application boundary.
Model the energy transition.
Own your workflow.
Manta is an enterprise-grade, open-source platform for using multiple energy system modelling frameworks, orchestrating workflows, and exploring results. It is built for teams that want a trustworthy, user-friendly, and sovereign alternative to proprietary planning software.
An Industrial-Grade Energy Planning Platform for Open, Extensible, and Cost-Effective Energy Modelling
If your team is using or evaluating PLEXOS®, PROMOD®, or other commercial energy market and production cost modelling platforms, Manta offers a different foundation: open source, inspectable workflows, flexible deployment, and an ecosystem designed around interoperable data and services.
An open platform without license fees democratizes energy planning so that operators, public institutions, civil society organizations, and commercial users build on the same foundation.
Why Switch to Manta
No License Fee, but Commercial Support Available
Advanced modelling is no longer a luxury. Use, inspect and extend Manta without paying a licence fee. Open Energy Transition and other ecosystem players will provide customized commercial support, training, and long-term maintenance.
Secure Deployment on Your Terms
Designed to scale from a local development stack to cloud and on site environments, while keeping security first. Manta is built following ISO 27001 certified processes and targeting compliance with security requirements such as the EU AI Act and Cyber Resilience Act.
Extensible & Interoperable
Manta lets you use leading open frameworks such as PyPSA, Sienna, and Antares through a flexible plug-in system that easily integrates with existing business processes and proprietary tools. By building on this mature open ecosystem, you can rapidly adopt new regulatory and technical constraints, advancements in modelling techniques, and AI developments.
AI-Accelerated UX
Integrate your favorite AI models to explain results, provide quick support, or even enable fully agentic control of Manta. All data and workflow changes are tracked and transparent – the AI is only there to make models understandable and faster to use.
Use Public & Confidential Data Securely
Work securely with your closed datasets, while also being able to work with open, model-ready data packages built from verified public sources. Combine verified open data with closed data while keeping full control of where sensitive data lives.
From Data to Decision
One platform for the complete modelling workflow
Manta brings data, modelling, orchestration, and results into one user friendly interface that combines the scientific rigor of best in class open models with the usability, speed, and workflow intelligence needed for real institutional adoption.
Build Models
Use both public & confidential input data securely
Use pre-validated model-ready datasets
Manage scenarios and track changes to data
Geospatial, tabular, and abstract graph views
Inspect and customize the math behind the models
Run
Use inbuilt playbooks for common analyses
Use any modelling framework as a building block
Develop custom analyses using blocks
Configure
Track and debug ongoing runs
Analyze
Geospatial, tabular, and abstract graph views of results
Customizable dashboards and reports that can be saved and shared
Import / export in shareable data formats
AI Assistance
Chat with an AI to build models and configure scenarios
Use AI to monitor logs, debug errors, suggest speedups
Inspect results and investigate anomalies with AI
Built for Analysts, Modellers, & Stakeholders
Analysts can configure, launch, and monitor studies without touching code.
Plug-in developers can ship new workflow blocks with their own dependencies.
Modellers can author reusable workflows and validations.
Stakeholders can explore results without needing to understand the execution machinery.
Open Ecosystem
Open software with professional support on top
Manta stays open source; Open Energy Transition and ecosystem players add the commercial support critical industries need on top.
01Community & Open Source
Operators, public institutions, civil-society organisations, and commercial users use the same software foundations, meaning improvements, new features, and bug fixes developed by one immediately benefit all others.
02Training & Migration
We conduct online or in-house training workshops to help modelling teams move from existing tools and establish repeatable Manta workflows.
03Use Private Data Securely
We help integrate pre-existing confidential data sources, analysis frameworks, compute infrastructure, and organisational processes securely on top of the open foundation.
04Customizable Models
We develop custom workflow components and domain-specific features for utilities, regulators, consultancies, researchers, and technology partners.
05Security & Maintenance
We offer optional maintenance contracts for organisations that need 24/7 support, SLAs, security updates and controlled upgrades, and predictable lifecycle management.
From Data to Decision
From Inception to MVP, Feature Parity, & Beyond
Our roadmap is open and thrives on community input. See our Milestones and planned Key Features on GitHub and join the conversation!
- September 2026
Foundations
Repository set up, tech stack initialized, development processes in place.
- Technology stack decided and set up
- Core components initialized (frontend, backend, database, authentication, workflow orchestrator, playbooks)
- CI/CD setup
- Contributing guidelines, license agreement
- Linting, testing, security scanning
- December 2026
Minimum Viable ProductBeta
OET-hosted cloud deployment that's open to the public to test and give feedback on the core features.
- Upload pre-constructed PyPSA models
- Inspect and update network and parameters
- Run a simple long term capacity expansion playbook
- Interactive results visualizations
- AI chat for documentation and tutorials
- Guest accounts on a cloud deployment
- Open source solvers (e.g. HiGHS)
- June 2027
Feature Parity
Support for the main features in PyPSA and other open models that enables users to start switching from proprietary tools.
- Use pre-validated datasets
- Build your own model interactively
- Scenario management, and batch runs
- Playbooks for all common PyPSA modelling workflows
- Customizable result dashboards and reports
- AI assisted scenario building, inspection, and debugging
- Integrate with identity providers (Google, Microsoft, and others)
- Deploy on site or use the OET cloud deployment
- Enterprise grade robustness and security
- December 2028
Multi-Framework
Go beyond what proprietary tools can offer by leveraging various leading open models.
- Plug-ins for standardized data pipelines
- Playbooks combining PyPSA with other models, such as PowSyBl for dispatch
- Build and share custom playbooks in the UI
- AI assisted workflow setup
- Build and share result dashboards with stakeholders
- Collaborate with version control on scenarios, workflows, and results
- Role based access control
Quick Answers
Frequently Asked Questions
01Who is building Manta?
Manta is being developed by Open Energy Transition, a non-profit organization that aims to make open energy models mainstream. We are building it under a separate GitHub organization with the aim of passing Manta on to an open-source community governance model, along the lines of other major open source projects.
02How will you guarantee support in the long term?
Open Energy Transition will offer professional support, security updates, and integration and customization services on top of Manta to industrial users. We will use part of this revenue to maintain Manta and add new features to it, alongside community contributions. Since Manta is open source, commercial consultants can also build business models that use Manta, and we are happy to help them to get started. We want to see a broad ecosystem that does not depend on individual organizations.
03Does it come with a solver?
Manta will support all leading open source solvers (HiGHS, SCIP, CBC, etc) and proprietary solvers such as Gurobi. Open Energy Transition can help select and, if needed, procure the right solver for your setup.
04Why are you building another application?
Our research indicates that open source modelling frameworks are nearly at feature parity with proprietary systems. However, a major gap for adoption is a graphical user interface and the enterprise application layer that industrial organizations require to adopt these open tools. Manta provides an intuitive modern GUI, a software architecture built for security-critical deployments, and is, crucially, open source. This not only sets Manta apart, it also ensures that users are not locked in to a product, and can easily integrate it with their existing technology stack and business operation tools.
05Can I continue to use my data from other proprietary solutions?
Using our data converters, we enable conversion of PLEXOS data models, allowing you to reuse all your datasets within Manta. This means you can build on years of existing modelling work instead of starting from scratch. Imported models can be inspected, validated, and progressively adapted to Manta’s open workflows, giving your team a practical migration path while preserving the data structures, assumptions, and institutional knowledge you already rely on.
06Do I need programming experience to use Manta?
Although Manta is open source, you don't need to know how to write code to access its full capabilities. Our no-code approach enables you to utilise Manta's full capabilities using our user-friendly graphical interface. The best part? If you feel that any functions are not accessible as you need them via the user interface, you can request that they be implemented via our public issue tracker or our premium support. However, if you know how to code, Manta will provide you with the full flexibility to apply our framework to your innovative ideas and specific needs, or even connect it to other open-source and closed-source frameworks.
07How does Manta compare to PLEXOS® or BID3™?*
Manta offers a fully open-source platform alternative where models, methods, and workflows can be thoroughly inspected, verified, and reproduced. It features an extensible plug-in architecture for custom components, flexible deployment spanning local, cloud, and on-premise environments, and operates without software license fees. To ensure a smooth transition, Manta includes dedicated data converters, enabling you to seamlessly reuse your existing data models and build upon your prior work within an open ecosystem. Like proprietary tools, Manta has optional commercial support offered by OET and other ecosystem players.
08How does Manta compare to Scenario Builder?
While both Manta and Scenario Builder build upon open-source modelling engines like PyPSA, only Manta is fully open-source. This means anyone can customize dashboards, the user interface, or even decide how and where it is deployed. This gives users full sovereignty over their entire technical stack, and end-to-end control over their data. Manta is also built to be interoperable with modelling frameworks other than PyPSA, enabling users to use the latest advancements and best tools for their specific use case.
* PLEXOS® is a product of Energy Exemplar. PROMOD® is a product of Hitachi Energy. BID3™ is a trademark of AFRY. Manta is independent and is not affiliated with, sponsored by, or endorsed by any of these entities.
