Skip to content
SPECIFICTION
Get listed

Siemens Building X

siemens.com

WebWindowsmacOSLinuxiOSAndroid
Visit siemens.com
Spec score 7.8 #9 of 29 in Smart Spaces Software

What it is

Siemens Building X is a cloud platform for managing building operations and using building data to improve sustainability, operations, and performance. Its applications address energy and sustainability, safety and security, and operations and maintenance. Energy Manager monitors energy use and costs, compares building portfolios, and provides custom performance indicators, analytics, and reporting. Building X connects with equipment from different vendors through Siemens solutions, gateways, and standard protocols; Siemens devices are not required. Open APIs support application development and system integration, including access to application, building, and user account data. Siemens hosts the platform on AWS and carries out deployment. Siemens says the building owner owns the data and determines how it is accessed, shared, and used. The company lists ISO/IEC 27001, 27017, and 27018 certifications and a SOC 2 Type II report for Building X; Energy Manager is ISO 50001-certified. Subscriptions are yearly, with pricing available by quote. Customers must contact Siemens about cancellation policies and regional availability. Workplace Experience supports mobile and web access and kiosk-supported access.

Spec sheet

What it does
Building X is a cloud platform that runs applications for building operations using secure, real-time data.Read 15 Oct 2026 · siemens.com
Purpose
Building X is a platform for managing building operations and using building data to improve sustainability, operations, and performance.Read 2 Oct 2026 · siemens.com
Integrations
Building X provides open APIs for application development and system integration, including APIs for application data, building data, and user account management.Read 2 Oct 2026 · siemens.com
Security
Siemens says its cloud offerings follow cybersecurity-by-design requirements covering secure communications, data deletion, login protection, and storage, and that its cybersecurity management standard is modeled after ISO 27001.Read 2 Oct 2026 · siemens.com
Support
Siemens offers a personalized walkthrough, live demonstration, and answers to questions through its quote process.Read 2 Oct 2026 · siemens.com
Headquarters
Munich, GermanyRead 28 Sep 2026 · siemens.com
Founded
1847Read 28 Sep 2026 · siemens.com
AI and forecasting
The platform offers AI and machine-learning analytics for real-time analysis and forecasting.Read 15 Oct 2026 · siemens.com
API access limits
Building X API Manager allows up to 200 machine users per partition and 75 per machine-user group.Read 2 Oct 2026 · siemens.com
API authentication
Developers authenticate with client credentials and receive a JWT bearer token that typically expires after 24 hours.Read 15 Oct 2026 · developer.siemens.com
API breaking change
The Operations API moved to a new eu.buildingx.siemens.com endpoint in May 2026; the old endpoint is scheduled for retirement after 31 March 2027.Read 15 Oct 2026 · developer.siemens.com
API change policy
Siemens reserves the right to change behavior for security fixes and normally gives registered users at least three months’ deprecation notice.Read 15 Oct 2026 · developer.siemens.com
API conventions
Building X APIs follow JSON:API conventions with Siemens-specific filtering, pagination and error-handling guidance.Read 15 Oct 2026 · developer.siemens.com
API Manager
API Manager provides API documentation, OpenAPI Specification resources, machine-user authentication, authorization and secret rotation.Read 15 Oct 2026 · siemens.com
API sandbox
A read-only sandbox is available immediately through the developer dashboard, but Fire, LifecycleTwin and Physical Security APIs are excluded from it.Read 15 Oct 2026 · developer.siemens.com
Central dashboard
Applications share a common dashboard and central data repository, allowing one login across applications.Read 15 Oct 2026 · siemens.com
Certifications
Siemens lists ISO/IEC 27001, 27017, and 27018 and a SOC 2 Type II report for Building X, and says Energy Manager is ISO 50001-certified.Read 2 Oct 2026 · siemens.com
Cloud hosting
Building X is based on AWS, and Siemens includes hosting and performs deployment.Read 2 Oct 2026 · siemens.com
Company database facts
Crunchbase lists Siemens as a public post-IPO-equity company headquartered in Munich with more than 10,001 employees.Read 15 Oct 2026 · crunchbase.com
Company founded
Siemens was founded in 1847.Read 15 Oct 2026 · gartner.com
Company legal name
The maker is Siemens AG, a public company headquartered in Munich, Germany.Read 15 Oct 2026 · linkedin.com
Company size
LinkedIn lists Siemens as having more than 10,001 employees and around 318,000 worldwide employees as of 30 September 2025.Read 15 Oct 2026 · linkedin.com
Compliance claims
The product page lists ISO/IEC 27001, 27017 and 27018, a SOC 2 Type II report, UL Smart System Verified Platinum and ISO 50001 for Energy Manager.Read 15 Oct 2026 · siemens.com
Connectivity
Building X is vendor-agnostic and can connect Siemens or third-party systems through gateways and standard protocols.Read 15 Oct 2026 · siemens.com
Data ownership
Siemens states that the building owner remains the owner of data generated in the property and controls access, sharing and use.Read 15 Oct 2026 · siemens.com
Documentation and support
Siemens provides online help, developer guides, API references, data sheets, training videos and release notes.Read 15 Oct 2026 · siemens.com
Energy alerts
Energy Manager can trigger alerts when monitored rules or events indicate deviations and rising costs.Read 15 Oct 2026 · siemens.com
Energy management
Energy Manager monitors energy use and costs, benchmarks building portfolios, supports custom performance indicators, and provides analytics and reporting.Read 2 Oct 2026 · siemens.com
Energy Manager
Energy Manager monitors energy, cost, water and equipment KPIs, benchmarks buildings, and supports custom rules, thresholds and baselines.Read 15 Oct 2026 · siemens.com
Energy savings claim
Siemens says customers achieve up to 30% energy savings through Building X efficiency optimization.Read 15 Oct 2026 · siemens.com
Gateway protocols
Siemens connect gateways support BACnet, Modbus, FCnet and C-WEB for connecting building products.Read 15 Oct 2026 · siemens.com
Google Play listing
Building X Access is listed by Siemens AG with 5K+ downloads; the page does not display a numerical rating.Read 15 Oct 2026 · play.google.com
Hosting
Building X is hosted in AWS data centers in Ireland, with related data primarily stored there.Read 15 Oct 2026 · siemens.com
Independent praise: automated reporting
KI-Syndikat credits the platform with portfolio energy reporting, automated data capture, scheduled reports and links to energy-market signals.Read 15 Oct 2026 · ki-syndikat.de
Independent praise: unified SaaS suite
Buildings magazine described the 2022 launch as a cloud, interoperable and modular SaaS suite combining energy, security and operations applications.Read 15 Oct 2026 · buildings.com
Integration documentation
The integration guide explains the data model and onboarding sequence and includes a Postman collection.Read 15 Oct 2026 · developer.siemens.com
Latest notable release
September 2026 release notes report a Forrester study with 176% ROI, €206,000 net present value and payback under six months for a composite organization.Read 15 Oct 2026 · siemens.com
Limit: cloud-only concern
The independent KI-Syndikat review describes Building X as SaaS without a full on-premises or air-gapped deployment option.Read 15 Oct 2026 · ki-syndikat.de
Limit: partner dependence
KI-Syndikat says implementation and customization usually rely on Siemens solution partners, creating potential supplier lock-in and limited alternative implementers.Read 15 Oct 2026 · ki-syndikat.de
Limit: small-building economics
KI-Syndikat argues that licensing and implementation are unlikely to make economic sense for a single office building below about 5,000 square metres.Read 15 Oct 2026 · ki-syndikat.de
Mobile access
The Workplace Experience app supports mobile and web access as well as kiosk-supported access.Read 2 Oct 2026 · siemens.com
Net operating income claim
Siemens reports customers generating up to 10% more net operating income through smarter workflows and faster issue resolution.Read 15 Oct 2026 · siemens.com
Public API
The public API portfolio uses REST APIs and covers application data, building structure, user accounts, energy, security, fire and point-value ingestion.Read 15 Oct 2026 · developer.siemens.com
Rating on Apple App Store
Building X Access is rated 3.6 out of 5 from 26 ratings in the German App Store listing.Read 15 Oct 2026 · apps.apple.com
Rating on Gartner Peer Insights
Siemens is rated 4.5 out of 5 from 113 reviews in Gartner's Global Industrial IoT Platforms market comparison; this is a Siemens vendor rating, not a Building X-specific score.Read 15 Oct 2026 · gartner.com
Security controls
Siemens describes cybersecurity-by-design requirements covering secure communications, deletion, login protection, storage and backups.Read 15 Oct 2026 · siemens.com
Security integrations
Security Manager integrates with Siemens SiPass and SIPORT access-control systems without additional hardware.Read 15 Oct 2026 · siemens.com
Security Manager
Security Manager centrally manages identities, privileges, credentials, access events, visitor workflows and security KPIs.Read 15 Oct 2026 · siemens.com
Subscription terms
Building X subscriptions are yearly, and Siemens directs customers to contact it about cancellation policies and regional availability.Read 2 Oct 2026 · siemens.com
Use cases
Its applications cover energy and sustainability, safety and security, and operations and maintenance.Read 2 Oct 2026 · siemens.com
Use-case coverage
Its stated domains are energy and sustainability, safety and security, and operations and maintenance.Read 15 Oct 2026 · siemens.com
Workplace Experience
Workplace Experience supports desk, room and amenity booking, coworker coordination, indoor maps, wayfinding and notifications.Read 15 Oct 2026 · siemens.com
Workplace integrations
Workplace Experience lists Microsoft Teams, Outlook, Google Calendar, Microsoft Intune AAD, SSO, user provisioning, QR codes and booking APIs as integrations.Read 15 Oct 2026 · siemens.com

Plans and prices

Building X application or API subscription Price not published Yearly; contact Siemens for pricing and cancellation terms Applications and APIs purchased separately · scale by adding subscriptions · hosting and deployment included Read 15 Oct 2026 · siemens.com

Every Siemens Building X plan and price →

Strong points and limits

Strong points

  • Energy Manager monitors energy use and costs.
  • Supports connectivity without requiring Siemens devices.
  • Open APIs support application development and integration.
  • Building owners control access to their data.
  • Workplace Experience supports mobile, web, and kiosk access.

Limits

  • Subscription prices are available by quote.
  • Subscriptions are yearly.
  • Regional availability requires contacting Siemens.
  • Cancellation policies require contacting Siemens.

Who it suits

Building X suits organizations managing building operations, energy use, sustainability, safety, or maintenance. Its vendor-agnostic connectivity may fit sites that do not use Siemens devices.

Siemens Building X in depth

Read the full write-up

Siemens Building X is a cloud platform for building operations, energy management, and connected applications. It best suits owners and teams coordinating work across building portfolios. Its open connectivity is a strong foundation, but yearly subscriptions and API user limits merit scrutiny before rollout.

Overview

Building X brings applications and building data together across energy and sustainability, safety and security, and operations and maintenance. That breadth can suit organizations seeking a connected management platform; teams needing only a narrow energy-monitoring tool may find its wider scope unnecessary.

The platform connects through Siemens solutions, gateways, and standard protocols, without requiring Siemens devices. Open APIs cover application data, building data, and user accounts, supporting custom applications and system integrations. Siemens hosts the service on AWS and handles deployment, so customers do not need to run the platform's cloud environment themselves.

Building owners retain ownership of building data and decide how it is accessed, shared, and used. Siemens says its cloud services follow cybersecurity-by-design requirements for secure communications, data deletion, login protection, and storage, and that its cybersecurity management standard is modeled on ISO 27001. Building X certifications include ISO/IEC 27001, 27017, and 27018, plus a SOC 2 Type II report; Energy Manager is ISO 50001-certified.

Key features

Portfolio energy management

Energy Manager tracks energy use and costs across building portfolios, supports benchmarking and custom performance indicators, and provides analytics and reporting. Automated utility-data imports, carbon tracking, and forecasting workflows make it relevant to teams monitoring energy and sustainability performance across sites. The portfolio focus is useful for comparison and oversight, but does not by itself establish that every building's data will be equally complete.

Building operations and integration

Building X supports HVAC control, alarm management, environmental monitoring, and access integration. Its vendor-agnostic connectivity and APIs give organizations room to connect existing systems and develop applications, rather than tying the platform to Siemens hardware. API Manager allows up to 200 machine users per partition and 75 per machine-user group; organizations with larger integration footprints should check how those ceilings fit their architecture.

Mobile access and analytics capabilities

The Workplace Experience app supports mobile and web access, as well as kiosk-supported access. The platform also includes time-series modeling, model evaluation, automated machine learning, and batch and real-time deployment modes. These capabilities may serve teams building data-driven workflows, though their presence alone does not define which applications or subscription scope includes each one.

Pricing

Building X uses a freemium pricing model, but it has no free plan. The Building X application or API subscription has custom pricing and is billed yearly. Customers can start with one application and expand to others for target use cases, which allows a scoped entry; the trade-off is that a yearly commitment and quote-based pricing make cost comparison less direct. Contact Siemens to confirm regional availability and cancellation terms.

Siemens offers a personalized walkthrough, live demonstration, and answers to questions through its quote process. Use that discussion to confirm which applications or APIs are included in the proposed subscription and how the API Manager limits apply to the intended deployment.

Platforms

Building X supports Android, iOS, Linux, macOS, web, and Windows, and provides API access. Its deployment is cloud-based, with Siemens hosting the service and performing deployment.

Who it's for

Building owners and facilities or sustainability teams managing multiple connected buildings are the clearest fit, especially when they need energy monitoring alongside operations, safety, and integrations. Development and IT teams can also benefit from open APIs and vendor-agnostic connectivity. A single-site buyer looking for a narrowly focused tool, or an organization unable to accept yearly custom-priced subscriptions, should compare more targeted options.

Pros and cons

Pro: Vendor-agnostic connectivity and open APIs support integration without requiring Siemens devices.

Pro: Portfolio energy monitoring combines cost and usage tracking, benchmarking, custom indicators, analytics, and reporting.

Pro: Building owners control how their data is accessed, shared, and used.

Con: No free plan is available, and yearly custom pricing requires a quote, complicating upfront budget comparisons.

Con: API Manager caps machine users at 200 per partition and 75 per machine-user group, which may constrain larger integration designs.

Con: Regional availability and cancellation policies require confirmation with Siemens.

Alternatives

For a different route into energy and building operations, consider Honeywell Forge: its product-specific offerings have custom pricing, and Advanced Process Control uses term-based licensing with feature choices. Enertiv is worth considering for a no-commitment portfolio diagnostic using read-only ESPM data; its free diagnostic is free. If meter-based energy and scope 3 data are central, EnergyElephant offers a Large plan at $7.30 a month with a 300 meter/data-point minimum, scope 3 data, unlimited users, and real-time data options.

For household use, FTW has a free community plan with best-effort community support. Organizations seeking free open-source building-management software can consider BEMServer, which is available at free, but requires customers to handle installation, configuration, maintenance, and selected modules. KERO is another paid option for building management.

Spacewell offers separately named Workplace Ultimate, Energy Ultimate, and Asset Ultimate plans with custom pricing. GridPoint Intelligence has a free trial and offers out-of-the-box or site-customized packages with custom pricing.

Readers comparing adjacent categories can also browse Energy Management Software, Predictive Analytics Software, Building Management Software, AutoML Software, Electrical Design Software, and Data Science Platforms.

Verdict

Choose Building X if you manage connected building portfolios and want energy oversight, operational applications, and open integration options in one cloud platform. Its strongest case is breadth without a Siemens-device requirement; its main drawback is the yearly, custom-priced subscription, with API user caps to validate for larger deployments. Buyers who need a free entry point or a narrowly focused, readily priced tool should look elsewhere.

Verdict

Building X combines building-operation applications, portfolio energy monitoring, and open integration options in a cloud platform. Confirm quoted pricing, regional availability, and cancellation terms with Siemens before selecting a subscription.

Where Specifiction places it

Alternatives to Siemens Building XAll alternatives →