Fusebox Energy
Fusebox Energy is a Tallinn-based private company that develops Fusebox OS, a hardware-agnostic SaaS operating layer for distributed energy resources and virtual power plants, serving European utilities, energy traders, and independent aggregators across 14 EU countries.
- Company typePrivate
- Founded2013
- HeadquartersTallinn, Estonia
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Fusebox Energy does
Fusebox Energy OÜ is an Estonian private company founded in 2013 and headquartered in Tallinn that develops Fusebox OS, a hardware-agnostic, cloud-based operating layer (SaaS platform) for distributed energy resources (DERs) and virtual power plants (VPPs). The platform is modular, with three core capabilities — Control (real-time site control and dispatch for PV, wind, BESS, and flexible loads), Aggregation (portfolio orchestration and market-ready pooling across TSOs), and Interoperability (open APIs over Modbus, IEC-104, and MQTT for connecting existing controllers, forecasting tools, and trading desks). Fusebox additionally offers a Spec-Driven Development (SDD) framework for co-built custom software, optional managed hosting, and Fusie, an AI-powered knowledge bot for VPP and energy-flexibility queries.
Fusebox generates revenue primarily through multi-year SaaS subscriptions (disclosed operating-cost band of €0.1–€0.6M/year per customer, plus €0.05–€0.6M upfront for onboarding and integrations), supplemented by custom development professional services and optional managed hosting. The go-to-market is enterprise-led and consultative, with quote-based pricing and no self-serve purchase; primary CTAs are "Book a call" and "Get in touch," targeting utilities, energy traders, independent aggregators, and balance responsible parties across Europe. The company is ISO/IEC 27001:2022 certified and the platform is reported live in 14 EU countries with 9 TSO integrations enabling mFRR, aFRR, and FCR ancillary market participation; single deployments manage 1,000+ connected assets and 300+ MW.
The company has raised approximately €6.5M in equity across five disclosed rounds from 2018 to January 2025, with investors including Contrarian Ventures, Fly Ventures, Eneco (strategic utility investor), PKO VC, SmartCap, and Soulmates Ventures. It has additionally received roughly €787K in non-dilutive grants from the EU and the Republic of Estonia, including projects in Estonia, Tanzania, and Kenya. Named logos on the website include Pixii, Huawei, Qilowatt, Siemens, and ABB. Headcount is reported at 11–50 employees, and revenue is not publicly disclosed.
Fusebox Energy firmographics
Firmographics- Name
- Fusebox Energy
- Legal name
- Fusebox OÜ
- Website
- https://fusebox.energy
- Company type
- Private
- Founded year
- 2013
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Fusebox Energy is a Tallinn-based private company that develops Fusebox OS, a hardware-agnostic SaaS operating layer for distributed energy resources and virtual power plants, serving European utilities, energy traders, and independent aggregators across 14 EU countries.
- Ownership category
- akta.pro rank
Fusebox Energy industry classification
Industry- Product category
- Virtual Power Plant / Energy Flexibility Software
- NAICS
- Computer Systems Design and Related Services (5415), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518), Electric Power Transmission, Control, and Distribution (22112)
- SIC
- Services-Prepackaged Software (7372), Services-Computer Integrated Systems Design (7373), Services-Computer Programming Services (7371)
- akta.pro primary industry
- VPP Orchestration & Aggregator Operating Platforms (EUAFAKAC)
- akta.pro secondary industries
- DER Dispatch, Aggregation & Virtual Power Plant (VPP) Integration (EUADALAI), DER Aggregation & Virtual Power Plants (VPPs) (EUAMAJAC), Customer Grid-Edge Enablement Services (HEMS/DR Device Integration, VPP Enablement) (EUAEANAL), Device/Asset Enablement & Edge Control (IoT Gateways, Controllers, Interoperability) (EUAFAHAI)
Keywords
Where Fusebox Energy is headquartered
LocationHeadquarters
- HQ city
- Tallinn
- HQ country
- Estonia
- HQ region
- Europe
Offices1 record
Markets served
Fusebox Energy business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales
Revenue model
- SaaS Platform Subscription: Fusebox OS is offered as a cloud-based SaaS platform with modular building blocks. Operating costs are €0.1–€0.6M/yr for subscription-based access to the platform, including onboarding and integrations.
- Custom Development & Professional Services: Co-build custom software on top of the SDD framework (Spec-Driven Development). Customers own the resulting code and IP. Engagement options include SaaS + integrations, SaaS + custom, or pure consultation.
- Optional Hosting & Monitoring: Optional managed hosting and monitoring services for customers who prefer not to run the platform on their own infrastructure.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Multi-year contract | Fusebox OS SaaS platform with modular building blocks |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
Fusebox Energy product offering
Product offeringCore offering
Fusebox OS is a cloud-based, hardware-agnostic unified operating layer for Distributed Energy Resources (DERs) and Virtual Power Plants (VPPs) that combines real-time control, forecasting, dispatch, portfolio orchestration, and automated TSO-compliant ancillary market workflows in a single modular environment. It connects to existing assets, trading desks, and forecasting tools via open APIs and standard industrial protocols (Modbus, IEC-104, MQTT) without requiring rip-and-replace of customer hardware. Offered as a SaaS subscription with optional custom development and managed hosting services to utilities, energy traders, and independent aggregators across 14 EU countries.
Product overview
Fusebox Energy offers Fusebox OS as a unified operating layer for Distributed Energy Resources (DERs) and Virtual Power Plants (VPPs). The platform provides modular capabilities through three core modules: Control (real-time site control and dispatch for PV, wind, BESS, and flexible loads), Aggregation (portfolio orchestration into market-ready capacity), and Interoperability (open API integration with existing tools and systems). Additional offerings include Custom Development services using the Spec-Driven Development (SDD) framework leveraging 11+ years of operational experience, and Fusie, an AI-powered knowledge bot for VPP queries. The platform is live in 14 European countries with 9 TSO integrations enabling mFRR, aFRR, and FCR participation, and is ISO 27001 certified.
Differentiator
Problem solved
Functional benefit
Brands
- Fusebox OS: Unified operating layer for DERs & VPPs - the company's core software platform providing real-time control, aggregation, and market execution for distributed energy resources
- Fusie
- SDD Framework
Products and services
- Fusebox OS Cloud-based, hardware-agnostic unified operating layer for Distributed Energy Resources (DERs) and Virtual Power Plants (VPPs) that unifies real-time control, forecasting, dispatch, portfolio orchestration, and automated TSO-compliant ancillary market workflows (mFRR, aFRR, FCR) for utilities, energy traders, and independent aggregators. Offered as a multi-year SaaS subscription with onboarding, integrations, and optional managed hosting.
- Custom Development (Spec-Driven Development Framework) Professional service in which Fusebox co-builds custom software on top of its Spec-Driven Development (SDD) framework, distilling 11+ years of energy operations DNA into customer-specific solutions. Engagement options include SaaS + integrations, SaaS + custom, or pure consultation; clients retain 100% ownership of the resulting code and IP.
Quantifiable outcome
- Time to production: Weeks–months vs 4–12 months (single-vendor) or 9–30 months (in-house build)
- +4 more outcomes
Companies that use Fusebox Energy
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles4 records
Fusebox Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability5 records
Feature6 records
Fusebox Energy partnerships and signals
Strategic signalScale indicators8 records
Recent moves6 records
Expansion highlights6 records
Fusebox Energy competitors and assessment
Company assessmentDirect peers
- EnergyHub: US-based DER management and VPP platform for utilities, offering aggregation, dispatch, and market participation. Most direct comparable on the software-only side, with similar utility/aggregator customer base and similar hardware-agnostic positioning.
- Sympower: Amsterdam-based independent flexibility aggregator and VPP operator serving European utilities and grid operators. Closely comparable to Fusebox in business model, customer segment (aggregators/utilities), and European geographic footprint, though Sympower owns/operates assets rather than purely providing the orchestration software layer.
- GridBeyond: Ireland-based AI-driven flexibility and VPP platform targeting industrial and commercial customers across Europe. Comparable in targeting European industrial flexibility, asset orchestration, and market participation workflows.
- Voltus: Commercial DER aggregator and VPP operator participating in US ISO/RTO markets (mFRR/aFRR/FCR analogues). Directly comparable in business model of aggregating flexibility for ancillary services, though primarily US-focused.
- GreenCom Networks: German IoT and energy management platform providing DER aggregation, white-label VPP solutions, and flexibility services to utilities across Europe. Direct peer on hardware-agnostic, interoperable VPP orchestration for utilities.
- Sunverge: US-based VPP platform for utilities, aggregating distributed storage and DERs for grid services. Comparable software architecture and utility customer segment; smaller-scale direct peer in VPP orchestration.
- Kiwatt (Qilowatt): Italian smart energy and flexibility startup providing VPP and demand-response services in European markets. Already a named Fusebox customer/logo, and directly comparable as an emerging European flexibility aggregator using orchestration software.
Broad incumbents
- AutoGrid (Schneider Electric): Now part of Schneider Electric's Resource Advisor/Grid Operations portfolio, AutoGrid is a DER and VPP orchestration platform serving utilities worldwide. Comparable in core VPP orchestration technology, but with much larger corporate backing and broader portfolio reach than Fusebox.
- Enbala (ABB): Acquired by ABB and now operating as part of ABB's Electrification business, Enbala provides DER aggregation and VPP control for utilities and grid operators. Direct functional overlap with Fusebox but bundled into ABB's much broader industrial portfolio.
Emerging players
- Piclo: UK-based matching platform connecting flexibility providers with system operators and utilities. Overlapping in the flexibility market space but more marketplace-oriented than a VPP execution/control layer, making it a partial-overlap emerging peer.
Market position
Strengths1 record
Weaknesses1 record
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Fusebox Energy social profiles
Digital presenceFusebox Energy compliance and trust
Trust signalCompliance2 records
Fusebox Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Fusebox Energy leadership team
Management profileNumber of profiles
Profiles4 records
Fusebox Energy funding detail
Funding detailFunding overview
Funding rounds5 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Fusebox Energy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Fusebox Energy
What does Fusebox Energy do?
Fusebox OS is a cloud-based, hardware-agnostic unified operating layer for Distributed Energy Resources (DERs) and Virtual Power Plants (VPPs) that combines real-time control, forecasting, dispatch, portfolio orchestration, and automated TSO-compliant ancillary market workflows in a single modular environment. It connects to existing assets, trading desks, and forecasting tools via open APIs and standard industrial protocols (Modbus, IEC-104, MQTT) without requiring rip-and-replace of customer hardware. Offered as a SaaS subscription with optional custom development and managed hosting services to utilities, energy traders, and independent aggregators across 14 EU countries.
Is Fusebox Energy a public or private company?
Fusebox Energy is a private company. It is classified as venture growth investor backed and is currently operating.
When was Fusebox Energy founded?
Fusebox Energy was founded in 2013. It employs 11 to 50 people.
Where is Fusebox Energy based?
Fusebox Energy is headquartered in Tallinn, Estonia, in the Europe region.
How does Fusebox Energy make money?
Three revenue lines are on record. SaaS Platform Subscription is the primary driver. The others are custom Development & Professional Services and optional Hosting & Monitoring.
Who are Fusebox Energy's main competitors?
Direct peers on record are EnergyHub, Sympower, GridBeyond, Voltus, GreenCom Networks, Sunverge and Kiwatt (Qilowatt). Broad incumbents are AutoGrid (Schneider Electric) and Enbala (ABB). Piclo is listed as an emerging player.
Does Fusebox Energy have an API?
Yes. Open API architecture allowing connection to existing trading desks and forecasting tools. Fusebox OS acts as the reliable execution and connectivity layer. Users can plug in proprietary tools and use Fusebox OS for execution and connectivity. Supports telemetry, plans, results, and reporting outputs via open APIs. Developer documentation is at fusebox.energy.
What industry is Fusebox Energy in?
Fusebox Energy's product category is Virtual Power Plant / Energy Flexibility Software. Its primary akta.pro industry code is EUAFAKAC, VPP Orchestration & Aggregator Operating Platforms, with a secondary code of EUADALAI, DER Dispatch, Aggregation & Virtual Power Plant (VPP) Integration. Its NAICS code is 5415 and its SIC code is 7372.