EpiSensor vs Dexma
Full-stack IoT infrastructure vs software-only energy analytics. Dexma (now Spacewell Energy) provides a cloud-based energy management analytics platform. EpiSensor provides the complete hardware and software stack for energy monitoring. These are fundamentally different approaches, and understanding the distinction is key to choosing the right solution.
Company Overview
Dexma (Spacewell Energy)
Dexma was founded in Barcelona in 2007 as an energy management software platform. The company was acquired by MCS (a Nemetschek Group company) and rebranded as part of the Spacewell brand. Dexma's core product, DEXMA Detect, is a cloud-based energy management platform that ingests data from various hardware sources -- meters, sensors, IoT gateways, utility APIs, and manual uploads -- and provides analytics, benchmarking, anomaly detection, and reporting. Dexma does not manufacture its own hardware; instead, it works with a range of hardware partners and can accept data from multiple meter brands. Their strength lies in their analytics engine, which uses AI and machine learning to identify energy waste and optimisation opportunities.
EpiSensor
EpiSensor designs and manufactures wireless IoT infrastructure for energy monitoring. The platform includes Class 1 accuracy wireless energy sensors, environmental sensors, edge computing gateways with local data processing, and a cloud management platform for fleet management and configuration. EpiSensor owns the entire technology stack from the sensor hardware through the firmware, wireless mesh network, edge gateway, and cloud platform. This vertical integration means EpiSensor controls data quality from the point of measurement to the point of delivery, and can offer capabilities like demand response, edge computing, and guaranteed data integrity that pure software platforms cannot.
Feature-by-Feature Comparison
| Criteria | EpiSensor | Dexma (Spacewell Energy) |
|---|---|---|
| Deployment Model | Full stack: wireless hardware sensors, gateway, edge computing, and cloud platform | Software-only: cloud analytics platform that ingests data from third-party hardware |
| Wireless Technology | IEEE 802.15.4 self-healing mesh with AES-128 encryption -- purpose-built hardware | No proprietary hardware; relies on partner meters and gateways for data collection |
| Protocol Support | Modbus, M-Bus, BACnet, MQTT, REST API for data output to any platform | Accepts data via API, CSV upload, pulse counters, and various gateway integrations |
| Remote Management | Full hardware fleet management: remote configuration, firmware updates, health monitoring | Software dashboard management; hardware management depends on the hardware vendor chosen |
| Scalability | Hardware and software scale together; add sensors and gateways as needed | Software scales easily; hardware scaling depends on integration with chosen meter vendors |
| Accuracy | Class 1 accuracy guaranteed across all EpiSensor energy sensors | Accuracy depends entirely on whichever third-party meters are connected |
| Security | End-to-end: AES-128 from sensor to cloud, secure boot, signed firmware | Cloud platform security (SOC 2 type practices); hardware security varies by vendor |
| Pricing Model | Hardware purchase plus optional cloud subscription for fleet management | SaaS subscription per building or per data point; hardware costs are additional from separate vendors |
| Support | Single vendor for hardware and software -- one support relationship for everything | Dexma supports the software; hardware issues go to the hardware vendor |
Where EpiSensor Wins
Owns the Full Stack
When you choose Dexma, you need to separately source, install, and manage hardware from a different vendor. If something goes wrong with your data, you face the classic finger-pointing problem: is it the meter, the gateway, or the software? With EpiSensor, there is one company responsible for everything from the current transformer to the cloud dashboard. Data quality issues are diagnosed and resolved by the same team that designed the hardware and wrote the firmware.
Edge Computing and Demand Response
EpiSensor's gateway includes edge computing capabilities that process data locally before sending it to the cloud. This enables real-time demand response -- the system can trigger load shedding or control signals within milliseconds based on local energy conditions, without waiting for a round trip to a cloud server. Dexma's cloud-based architecture means all processing happens in the cloud, introducing latency that makes real-time control impractical for demand response applications.
Data Integrity and Quality
EpiSensor applies four levels of data validation between the sensor and the cloud, ensuring that the data arriving at your analytics platform is accurate, complete, and timestamped correctly. The self-healing mesh network automatically reroutes data if a communication path is disrupted, and the gateway buffers data locally if the internet connection drops. With Dexma, data quality depends on whatever hardware you have chosen -- and data gaps from unreliable hardware are a common challenge in software-only deployments.
Simplified Procurement and Deployment
With EpiSensor, you procure hardware and software from a single vendor, with a single set of documentation, a single support channel, and integrated commissioning tools. With Dexma, you need to evaluate and procure meters separately, find compatible gateways, ensure proper integration between hardware and Dexma's API, and manage relationships with multiple vendors. For energy service companies deploying across many sites, this complexity multiplies.
Where Dexma Might Be the Better Choice
Software Analytics and AI
Dexma's core strength is its energy analytics engine. Their DEXMA Detect platform includes AI-powered anomaly detection, baseline modelling using IPMVP methodologies, automated reporting, and energy benchmarking across building portfolios. If you already have reliable metering infrastructure in place and your primary need is sophisticated analytics and reporting on top of existing data, Dexma's focused analytics platform may provide deeper insights out of the box.
Multi-Vendor Hardware Support
Because Dexma is hardware-agnostic, it can ingest data from virtually any metering system -- Schneider, Siemens, ABB, Janitza, or even manual utility bill data. For organisations that already have diverse metering infrastructure across their building portfolio and want a single analytics layer on top, Dexma's ability to normalise and analyse data from multiple sources is a genuine advantage.
Energy Services Focus
Dexma has built strong tools for energy service companies (ESCOs) including white-labelling, IPMVP-compliant measurement and verification, and energy performance contract reporting. If your business model centres on energy performance contracting and you need M&V tools that conform to recognised protocols, Dexma has invested heavily in this specific workflow.
Utility Bill Integration
Dexma can combine real-time meter data with utility bill information, allowing you to reconcile sub-meter data against actual utility charges. This is useful for cost allocation, tenant billing, and identifying discrepancies between metered consumption and billed amounts. EpiSensor focuses on real-time metering data rather than utility bill management.
Choose EpiSensor if you need:
- A complete hardware and software solution from a single vendor
- Wireless deployment without sourcing hardware separately
- Edge computing for real-time demand response
- Guaranteed data quality from sensor to cloud
- One support relationship for your entire monitoring infrastructure
- The flexibility to use any analytics platform, not just one vendor's software
Choose Dexma if you need:
- Advanced analytics and AI on top of existing metering infrastructure
- A single software layer across diverse hardware brands
- IPMVP-compliant measurement and verification for energy performance contracts
- Utility bill integration and cost allocation tools
- Portfolio-level benchmarking across many buildings
- White-label analytics for energy service companies
Want the full stack, not just software?
Talk to our team about how EpiSensor delivers complete energy monitoring infrastructure -- from the sensor to the cloud -- with a single vendor relationship.