A company in "Digital Twins Software" creates software that simulates real-world objects, processes, systems, or services in a digital environment. These digital models or "twins" can then be used to analyze performance, test changes, troubleshoot issues, and predict future outcomes without impacting the actual physical or real-world counterpart. This technology is widely used in industries such as manufacturing, aviation, healthcare, and more.

1. Predictive Maintenance Software: This type of digital twins software predicts potential problems in a system using real-time data, enabling preventative maintenance.  

2. IoT Enabled Digital Twin Software: This software utilizes Internet of Things devices to replicate systems and processes in a digital environment, enhancing operational efficiency.  

3. Asset Management Software: This type of software utilizes a virtual replica to manage the assets of a business and keep track of their usage and maintenance.  

4. Control Twin Software: This software uses a digital twin to monitor, control, and optimize physical assets remotely, often used in industries such as manufacturing and energy production.  

5. Simulation Software: This software uses digital twins to simulate real-world scenarios, allowing for testing and improvement of products and systems without the need for physical prototypes.  

6. Industrial Digital Twin Software: This type of software is primarily used in manufacturing and industrial sectors to replicate and analyze industrial processes and production lines.  

7. System Integration Software: This software uses digital twins to integrate different systems and processes in a business, reducing the risk of operational silos and improving overall efficiency.

8. Data Analytics Software: This software utilizes digital twins to analyze data and generate actionable insights, helping businesses make better data-driven decisions.  

9. Product Lifecycle Management Software: This type uses a digital twin of a product to manage its lifecycle from initial design and manufacturing to service and disposal.  

10. Real-Time Tracking Software: This software uses digital twins for real-time tracking and monitoring of assets, systems, or processes.  

11. Building Information Modeling (BIM) Software: This type of software utilizes digital twins in the design, construction, and operation of buildings and infrastructure.  

12. Digital Twin Cloud Service: Some enterprises offer digital twin solutions in cloud-based models which can contain massive amounts of data and drive complex simulations.

Digital Twins software can assist with decarbonization in various ways:  

1. Energy Efficiency: Digital twins can create a virtual model of a physical system, which can be used for simulating and analyzing energy consumption patterns. This data can support decision making on how to reduce energy use and subsequently lower carbon emissions.  

2. Optimize Operations: Digital twins can help to optimize the performance of machinery and equipment, reducing unnecessary energy consumption and thereby cutting carbon emissions.  

3. Predictive Maintenance: Predictive maintenance which is facilitated by digital twin technology can lead to significant energy savings. By predicting and promptly addressing maintenance issues, companies can avoid energy waste.  

4. Infrastructure Planning: Digital twins can assist in planning infrastructure that is more energy efficient and less carbon intensive. This includes everything from designing buildings to optimally capture natural light to curbing energy loss in manufacturing plants.  

5. Innovate and Experiment: Digital twins allow organizations to run simulations and evaluate the impact and effectiveness of decarbonization strategies without disturbing the existing systems, leading to innovation and rapid implementation of carbon reduction activities.  

6. Reduce Waste: In production settings, digital twin technology can help simulate and optimize processes to reduce waste, which in turn reduces the energy required in manufacturing and disposal - contributing to decarbonization efforts.  

7. In the transition to renewable energy, digital twins can model the integration of renewable resources into the grid, helping to optimize the system for lower carbon emissions.  

8. Monitor and Control Emissions: With Internet of Things (IoT) sensors, digital twins can monitor real-time emissions data and help with controlling and reducing emissions. For instance, in a power plant, digital twin can help monitor and control the emissions data by providing real-time insights about which units are emitting more and which units are performing well.

When selecting a Digital Twins Software provider, there are several factors that you will need to consider. Here is a step-by-step guide on how to choose the right vendor:  

1. **Identify Your Goals**: Define what exactly you want the software to achieve. Do you want to improve efficiency, reduce carbon emissions, improve product design, or all of the above? Having clear goals will make it easier to choose a platform that suits your needs.  

2. **Research USPs**: Look for Digital Twins Software vendors who offer unique selling propositions (USPs) related to your needs. If your goal is to decarbonize your company, you might want to look for a vendor who specializes in creating digital twins for energy efficiency or carbon footprint reduction.  

3. **Evaluate Features and Capabilities**: Check what features and capabilities their platform has. Can it model different aspects of your business and predict impacts on carbon emissions? Can it model and monitor equipment energy usage? Can it create scenario analysis for different strategies? The more features that align with your objectives, the better.  

4. **Check Case Studies and Testimonials**: Look into their past projects and testimonials. If they have helped similar companies or industries to yours in achieving their carbon reduction goals, it’s a good sign they could be a suitable match.  

5. **Verify Technical Assistance**: Ask about their onboarding process and technical support. Installing and using new software can be daunting, especially if your team is unfamiliar with Digital Twins Technology. Good vendors should offer assistance to train and guide you.  

6. **Understand Costs**: Ask for a clear understanding of initial set-up costs, the pricing structure, any possible add-ons and the total cost of ownership.  

7. **Ask For a Demo or Trial**: Ask vendors for a demo of their product or a trial period. This will give you a chance to test out their interface, navigability, features, and capabilities.  

8. **Security**: Ensure the vendor employs high levels of data security protocols. Inquire about their encryption, data handling and privacy standards.  

9. **Scalability**: Choose a software that can grow as your company grows. As your company expands or evolves, your digital twins should also be able to adapt.   Using these criteria, you can evaluate potential vendors objectively and make an informed selection that best suits your company’s needs.