Microsegmentation Evaluation Criteria and RFP Checklist (2026)

Updated: August 10, 2026

Every microsegmentation RFP eventually comes down to the same handful of evaluation criteria: how the platform deploys, what it can see, which devices it can actually protect, and what it costs to operate at scale. Microsegmentation reduces the attack surface and contains lateral movement, but only if the platform you select fits the network you actually run—including the legacy segments, unmanaged devices, and OT equipment most evaluations discover too late.

This guide gives you the working material for that evaluation: the four platform architecture types and a criteria table for comparing them, the questions IT leaders actually ask before shortlisting, a vendor-agnostic RFP checklist, and the trade-offs of building versus buying.

Microsegmentation Platform Architecture Types

Before evaluating specific microsegmentation platforms, it is important to understand the four primary architecture approaches available in the market today. Each model has distinct trade-offs in deployment speed, coverage, and operational complexity.

Agent-Based Platforms

Agent-based microsegmentation platforms require installing software agents on every endpoint, server, or workload. These agents enforce policies directly on the host operating system. While this approach provides deep workload-level visibility, it introduces significant deployment overhead, ongoing agent management, and cannot protect devices that do not support software installation (such as OT sensors, IoT devices, and legacy systems).

Agentless, Network-Native Platforms

Agentless microsegmentation platforms enforce policies through the existing network infrastructure rather than requiring endpoint software. This approach enables rapid deployment (often days instead of months), eliminates agent lifecycle management, and extends protection to unmanaged devices including OT, IoT, and medical equipment. Elisity is a leading example of this architecture, using identity-based policies enforced at the network edge.

Hypervisor-Based Platforms

Hypervisor-based microsegmentation platforms operate at the virtual network layer, enforcing policies between virtual machines within a data center. While effective in fully virtualized environments, this approach is limited to workloads running on supported hypervisors and does not extend to physical endpoints, IoT devices, or multi-cloud environments without additional tooling.

Cloud-Native Platforms

Cloud-native microsegmentation platforms leverage cloud provider APIs and constructs (such as security groups, network policies, and service meshes) to enforce segmentation within cloud environments. These tools work well for cloud workloads but often lack visibility and control over on-premises infrastructure, creating gaps in hybrid environments.

Architecture Comparison: Evaluation Criteria by Platform Type

Understanding these architecture types is the first step toward selecting a microsegmentation platform that aligns with your environment, security goals, and operational capacity. For side-by-side scores on 12 leading platforms across these categories, see our full vendor comparison.

Evaluation Questions IT Leaders Ask

Two questions come up in almost every evaluation. Both deserve a direct answer.

Which microsegmentation platforms avoid complex implementation issues, according to IT leaders?

IT-leader reviews trace complex implementations to two sources: agent rollout across thousands of endpoints, and network redesign—re-IP projects, new VLANs, inline appliances. Platforms that enforce policy through the network infrastructure already in place avoid both, which is why agentless, identity-based platforms are typically shortlisted when implementation risk is the deciding criterion. Weight reviews from environments resembling yours over aggregate scores.

What are the best microsegmentation platforms for preventing lateral movement in legacy networks without redesign?

Shortlist platforms that enforce least-privilege policy on the switching a legacy network already has: no re-IP, no new VLANs, no inline appliances. Identity-based, agentless platforms such as Elisity bind policy to device identity rather than network location, so lateral movement is contained even inside flat legacy segments—without redesigning the network first.

Essential Features of Microsegmentation Solutions: What to Look For

When evaluating microsegmentation solutions, it's essential to focus on key features that contribute to an effective, secure, and manageable network. Here's a list of five critical features to look for in a microsegmentation solution:

1. Policy management capabilities: A robust microsegmentation solution should enable you to create, manage, and enforce granular policies based on various criteria, such as users, devices, applications, and network traffic patterns. This capability allows for better control and flexibility in managing network access and security.
2. Automation and orchestration: To reduce the complexity and administrative burden of managing microsegmentation, look for solutions that offer automation and orchestration features. These tools can help automate policy creation, enforcement, and updates, as well as streamline the overall management of your network segmentation strategy.
3. Real-time visibility: Gaining real-time visibility into your network traffic and assets is essential for monitoring and maintaining security. A good microsegmentation solution should provide comprehensive and actionable insights into your network, allowing you to quickly identify potential issues and take corrective action.
4. Scalability and adaptability: As your organization grows and evolves, your network security needs may change. It's crucial to choose a microsegmentation solution that can scale and adapt to your organization's changing requirements. This includes the ability to support various environments, such as on-premises, cloud, and hybrid networks.
5. Integration with existing infrastructure: To maximize the effectiveness and efficiency of your microsegmentation solution, it should seamlessly integrate with your existing network infrastructure and security tools. This ensures a smooth deployment process and allows you to leverage your current investments while enhancing network security.

By considering these essential features when evaluating microsegmentation solutions, you can ensure that the solution you choose aligns with your organization's network security goals and requirements.

The Microsegmentation RFP Checklist: What to Ask Every Vendor

These five factors decide most microsegmentation selections. Each one ends with the question to put in your RFP, phrased so that a vague answer is itself a signal:

1. Ease of deployment: Implementing a microsegmentation solution should be straightforward and efficient. Look for solutions that offer quick deployment, minimal disruption to existing operations, and a clear migration path from your current network setup.
   Ask in the RFP: “How many production devices reach enforced policy in the first 30 days, and what network changes does that require?”
2. Compatibility with various environments: Your chosen microsegmentation solution should support multiple network environments, including on-premises, cloud, and hybrid infrastructures. This ensures that your solution can adapt to your organization's evolving needs and network architecture.
   Ask in the RFP: “Which of our environments—campus, data center, cloud, OT—can you enforce policy in without new hardware?”
3. Integration with existing tools and platforms: To maximize the value of your microsegmentation solution, it should integrate seamlessly with your existing network infrastructure and security tools. This allows you to leverage your current investments while enhancing network security.
   Ask in the RFP: “Which of our current tools (EDR, CMDB, identity, CPS security) enrich your policy engine out of the box?”
4. Cost and pricing structure: Understand the costs associated with implementing and maintaining your chosen microsegmentation solution. Consider not only the upfront expenses but also the ongoing costs for support, updates, and maintenance. Choose a solution with a transparent and flexible pricing structure that aligns with your organization's budget and needs.
   Ask in the RFP: “What is the total three-year cost at our device count, including infrastructure, licensing, and the headcount to operate it?”
5. Vendor support and community resources: Opt for a microsegmentation solution backed by a strong support system, including responsive vendor support and a vibrant community of users. This ensures that you have access to resources and assistance when you need it, helping you make the most of your microsegmentation investment.
   Ask in the RFP: “What does a typical POC-to-production timeline look like for an organization our size, and who staffs it?”

A vendor that answers all five in writing, with numbers, is telling you something. So is a vendor that cannot.

Building vs. Buying: Pros and Cons of Developing Your Microsegmentation Solution

When it comes to implementing a microsegmentation solution, organizations have two primary options: building a custom solution in-house or opting for a third-party solution. Both approaches have their advantages and disadvantages. Let's explore these pros and cons to help you make an informed decision:

Advantages of building a custom microsegmentation solution:

1. Tailored to your specific needs: Developing a custom solution allows you to create a microsegmentation strategy that addresses your organization's unique requirements and network architecture.
2. Full control over features and functionality: When building in-house, you have complete control over the features and capabilities included in your solution, ensuring it aligns with your organization's priorities.
3. Integration with existing systems: A custom solution can be designed to integrate seamlessly with your current network infrastructure and security tools.

Disadvantages of building a custom microsegmentation solution:

1. High development costs: Building a custom solution can be expensive, as it requires significant resources, time, and expertise.
2. Longer implementation timeline: Developing a custom solution can take longer than implementing a third-party solution, potentially delaying the benefits of microsegmentation.
3. Ongoing maintenance and support: Maintaining and updating a custom solution requires dedicated resources, which can divert attention from other important IT initiatives.

Benefits of opting for a third-party microsegmentation solution:

1. Faster deployment: Third-party solutions are typically quicker to implement, as they are designed for easy integration and deployment in various network environments.
2. Established feature set: Third-party solutions often come with a robust set of features and capabilities that have been proven effective in real-world scenarios.
3. Vendor support and updates: Opting for a third-party solution provides access to ongoing vendor support, updates, and improvements, ensuring your solution stays current and effective.

Drawbacks of opting for a third-party microsegmentation solution:

1. Less customization: Third-party solutions may not offer the same level of customization as a custom-built solution, which could limit their effectiveness in addressing your organization's unique needs.
2. Potential integration challenges: Integrating a third-party solution with your existing infrastructure and tools may be more complex than building a custom solution designed for seamless integration.
3. Ongoing costs: Some third-party solutions may have recurring costs, such as subscription fees or support costs, which can impact your organization's budget.

By weighing the pros and cons of building vs. buying a microsegmentation solution, you can choose the approach that best aligns with your organization's resources, network security goals, and budget constraints.

Microsegmentation Solution Deployment: Best Practices and Tips

Deploying a microsegmentation solution can be a complex process, but with the right approach and preparation, you can ensure a successful implementation. Here are some best practices and tips to consider during deployment:

Planning and preparation:

1. Assess your current network infrastructure, identifying assets, dependencies, and potential vulnerabilities.
2. Define clear objectives for your microsegmentation implementation, including specific security goals and performance requirements.
3. Establish a project timeline and assign roles and responsibilities to your team members.

Testing and validation:

1. Test the microsegmentation solution in a controlled environment to validate its effectiveness and identify any potential issues.
2. Perform a thorough review of the defined policies and rules to ensure they align with your organization's security goals.
3. Regularly update and adjust your policies based on test results and feedback from stakeholders.

Ongoing management and monitoring:

1. Monitor the performance and effectiveness of your microsegmentation solution continuously to identify potential threats and vulnerabilities.
2. Establish a process for reviewing and updating policies, rules, and configurations as needed to maintain optimal security.
3. Regularly audit your network environment to ensure compliance with industry standards and regulatory requirements.

Continuous improvement and adaptation:

1. Stay informed about the latest trends, technologies, and best practices in network security to adapt your microsegmentation strategy as needed.
2. Encourage open communication and collaboration among your team members to identify areas for improvement and innovation.
3. Continuously assess the effectiveness of your microsegmentation solution and make adjustments as necessary to ensure optimal network security and performance.

The Importance of Choosing Wisely: A Final Word on Microsegmentation Solutions

In conclusion, selecting the right microsegmentation solution is crucial for the success of your network security strategy. By considering the essential factors outlined in this guide, the evaluation criteria, the RFP checklist, building vs. buying, and deployment best practices, you can make an informed decision that aligns with your organization's needs and goals. Explore our microsegmentation resource center for additional research, frameworks, and vendor comparisons. Remember, the right microsegmentation platform can significantly enhance your network security posture, reduce the attack surface, and improve overall performance, making it a vital investment for the long-term success of your organization.