Best Microsegmentation Tools 2026

Updated November 2026. Competitor facts checked November 3, 2026.

Five microsegmentation tools scored on the asset and risk context behind policy, how policy is built and tested, where it is enforced, and how each responds to threats.

Introduction

Microsegmentation is the networking strategy that limits each asset to the connections its function requires, whether to people or to other systems, so one compromised device cannot be used to reach the rest of its zone. CISA’s 2025 guidance, Microsegmentation in Zero Trust, Part One, describes it as a way to reduce the attack surface and limit lateral movement. It’s what macrosegmentation wanted to be and what flat networks are the antithesis of. A microsegmentation tool builds that idealized policy that has the most security and no effect on the asset’s legitimate business use and enforces it through host agents, network access control (NAC) platforms, firewalls, or switches.

Many organizations can write or have written the microsegmentation policy. They’re just afraid to enforce it. A rule that cuts a camera off from everything except its video server is easy to write and hard to approve, because the operations team that owns uptime often holds the veto and often cannot see what the rule will break.

This guide ranks five tools on how they take a team from knowing what an asset is to enforced least-privilege policy across Internet of Things (IoT), operational technology (OT), and IT assets. A policy can only limit an asset the tool has found and understood, so the inventory comes first. The more detailed, the better, because that helps determine which vulnerabilities, including those discovered later, are urgent to address and which are not because they are not exploitable. Tools then differ in where they enforce: host agents on servers and workloads, the network through NACs and firewalls, or the switch itself. Asimily publishes this ranking and is one of the five tools scored. Asimily chose the criteria and scored every tool, including its own, against the same capability checklist, and the scoring rule is published below so readers can check the result. Please take this into account and perform your own assessment.

Quick Answer: The Best Microsegmentation Tools in 2026

The best microsegmentation tools in 2026 are Asimily (2.8), Elisity (2.2), ColorTokens (2.1), and Illumio and Ordr (tied at 1.9), scored 1.0 to 3.0 on asset and risk context, policy creation, simulation and rollout, enforcement options, and threat and response. Asimily publishes this ranking and ranks itself first. Validate any tool in your own environment.

• Asimily (2.8): Best for device-level policy on IoT, OT, and IT assets that cannot run an agent, tested against real traffic and enforced through the NACs and firewalls a team already runs.
• Elisity (2.2): Best for campus and facility networks that want identity-based policy enforced on supported switches they already run.
• ColorTokens (2.1): Best for one platform across workloads, cloud, and legacy or OT devices, with agent, agentless appliance, and cloud-native enforcement.
• Illumio (1.9, tie): Best for data center and cloud workloads where a host agent can enforce label-based policy.
• Ordr (1.9, tie): Best for converged networks that want AI-generated policy applied through existing firewalls, NACs, and switches.

How We Ranked Microsegmentation Tools

Ratings draw on Asimily’s competitive research and discussions with prospects and customers, plus public vendor documentation and dated news coverage. Where no public source addresses a checklist item for a vendor rated from public documents, the item is left out of that vendor’s coverage rather than counted against it. Competitor details reflect public information as of November 2026.

The ranking emphasizes policy creation (30%) and simulation and rollout (20%), half the total, because microsegmentation stalls when policy is hard to build or hard to trust, and a rule nobody dares enforce protects nothing.

1. Asset Inventory and Risk Context (20%): Detailed inventory with classification of IoT and OT devices, passive monitoring and safe active querying, deep packet inspection and network flow analysis, ecosystem integrations, MITRE ATT&CK-based classification, ATT&CK analysis for each vulnerability, vulnerability and threat prioritization, and targeted segmentation recommendations for legacy assets.
2. Policy Creation (30%): Asset grouping, AI-based grouping and policy creation, policy compression, and policies that adapt as devices change.
3. Simulation and Rollout (20%): Simulation of policy effects before segments change, a view of security groups with simulation or active status, and an enforcement plan preview before commit.
4. Enforcement Options (20%): Integration with existing NACs and firewalls, a view of every policy applied at those points, switch-level enforcement, and segmentation without re-addressing devices.
5. Threat and Response (10%): Anomaly policies for notification or quarantine, no-code network alerts, and packet capture for incident response.

Each criterion maps to a fixed checklist of capabilities, and a tool’s level comes from how much of that checklist it covers natively. Advanced (3 pts) means 80% or more, Strong (2 pts) means 50% to 79%, and Moderate (1 pt) means below 50%. The score is the weighted average of points, from 1.0 to 3.0. The ranking does not score price, host-agent enforcement, container enforcement, or native cloud controls. Analyst evaluations that do weigh those capabilities rank differently: Forrester’s Q3 2026 Wave for microsegmentation named Akamai Guardicore, Cisco Secure Workload, ColorTokens, and Illumio Leaders.

2026 Microsegmentation Tool Rankings

Asimily ranks first at 2.8, with its widest lead over the next-ranked tool in Asset and Risk Context, followed by Elisity (2.2), ColorTokens (2.1), and Illumio and Ordr (tied at 1.9). Asimily rates Strong rather than Advanced on Enforcement Options because it has no switch-level enforcement of its own.

Rank	Tool	Score	Asset and Risk Context	Policy Creation	Simulation and Rollout	Enforcement Options	Threat and Response
1	Asimily	2.8	Advanced	Advanced	Advanced	Strong	Advanced
2	Elisity	2.2	Moderate	Advanced	Advanced	Strong	Moderate
3	ColorTokens	2.1	Strong	Advanced	Strong	Moderate	Strong
4 (tie)	Illumio	1.9	Strong	Strong	Strong	Strong	Moderate
4 (tie)	Ordr	1.9	Strong	Strong	Strong	Strong	Moderate

How Each Tool Enforces Microsegmentation Policy

The tools differ most in where policy is enforced, whether each asset needs an agent, and how policy is tested first.

Tool	Enforcement Point	Agent on Each Asset	Testing Before Enforcement
Asimily	Existing NACs and firewalls, such as Cisco ISE and FortiGate	No	Policy Simulation on real traffic, then an Enforcement Plan
Elisity	Supported switches through Virtual Edge	No	Policies saved as simulations
ColorTokens	Host agent, EDR agent, inline appliance, cloud controls	Agent, or inline appliance for devices	Simulation on historical traffic
Illumio	Host agent, switch ACLs, Check Point firewall rules	Yes for workloads	Policy modeling before enforcement
Ordr	Firewalls, NACs, and switches	No	Connection matrix with built-in simulation

Vendor Profiles

Asimily

Asimily is an asset protection platform for assets including IoT, OT, middleware, AI agents, servers, endpoints, and more, and it treats microsegmentation as one of many asset security features. It builds a richly detailed inventory first, using deep packet inspection, machine learning classification against well over 10,000,000 observed devices and profiles, and over 150 correlated sources. ATT&CK Analysis then ranks assets by exploitability, so the riskiest groups are segmented first. Segmentation Orchestration generates policy from observed traffic in the native format of the NAC or firewall already in place, so devices keep their IP addresses. Policy Simulation records what a policy would block before it takes effect, and an Enforcement Plan lists each deployment step for review. Asimily has no switch-level enforcement of its own. Rated 4.9 out of 5 on Gartner Peer Insights (55 reviews, October 2026).*

*Gartner Peer Insights content consists of the opinions of individual end users based on their own experiences, and should not be construed as statements of fact, nor do they represent the views of Gartner or its affiliates. Gartner does not endorse any vendor, product or service depicted in this content nor makes any warranties, expressed or implied, with respect to this content, about its accuracy or completeness, including any warranties of merchantability or fitness for a particular purpose.

ColorTokens

ColorTokens Xshield is a microsegmentation platform for data center servers, cloud workloads, Kubernetes, endpoints, and IoT, OT, and legacy devices. It enforces through its own agent or existing endpoint detection and response (EDR) agents, through native cloud controls such as AWS security groups, and through the agentless Xshield Gatekeeper appliance, which becomes the network gateway for devices that cannot run an agent. Policies can be simulated on up to 30 days of historical traffic, and the Xshield AI Agent, launched in March 2026, generates policy from plain-language queries. Forrester named ColorTokens a Leader in its Q3 2026 Microsegmentation Wave (Forrester), and GigaOm named it a Leader in its 2026 Radar for microsegmentation.

Elisity

Elisity is a cloud-managed, identity-based microsegmentation platform. Its IdentityGraph enriches device identity from sources such as Active Directory, Okta, ServiceNow, and CrowdStrike, and policy groups built on those attributes replace static IP-based rules. Virtual Edge components run on supported Cisco, Juniper, Arista, HPE Aruba, and Hirschmann switches, so policy is enforced on switches the network already runs, without endpoint agents. Policies can be saved as simulations before enforcement. IonQ announced an agreement to acquire Elisity on October 12, 2026, with closing expected in the fourth quarter. Forrester named Elisity a Strong Performer in its Q3 2026 Microsegmentation Wave (Forrester).

Illumio

Illumio Segmentation, like ColorTokens, is host-centric. It enforces policy mainly through a host agent, the Virtual Enforcement Node, that programs each workload’s native firewall across data centers, cloud, containers, and endpoints. Workloads are grouped with labels such as application, environment, and location, and policy can be modeled before enforcement. Its Network Enforcement Node generates switch access control lists (ACLs) for supported Cisco Nexus and Arista switches, and an integration (such as with Check Point) writes firewall rules. IoT and OT device data comes from partners such as Armis and Claroty. Forrester named Illumio a Leader in its Q3 2026 Microsegmentation Wave.

Ordr

Ordr AI Protect profiles IoT, OT, and IT devices with AI-based fingerprinting, and AI Protect for Segmentation groups them by function, role, and risk to generate least-privilege policy from observed behavior. A connection matrix with built-in simulation shows the impact of each policy before an analyst approves it. Policies are applied through existing firewalls, NACs such as Cisco ISE and Aruba ClearPass, and switches from Cisco, Aruba, and Juniper. In March 2026, Ordr introduced Ordr IQ, an AI assistant that generates and validates segmentation policy.

Best Microsegmentation Tools for Data Center and Cloud Workloads

For teams whose microsegmentation program starts with servers, virtual machines, containers, and cloud workloads, these tools fit best:

1. Illumio: Enforces label-based policy through a host agent that programs each workload’s native firewall, across data centers, cloud, containers, and endpoints.
2. ColorTokens: Enforces through its own agent, existing EDR agents, or native cloud controls such as AWS security groups.
3. Akamai Guardicore Segmentation: Segments workloads at the process level, and in March 2026 added AI that generates policy and tests its impact before enforcement (SiliconANGLE).

Asimily installs no host agents and enforces through NAC and firewall infrastructure, so it fits programs whose larger gap is connected devices rather than servers.

Best Microsegmentation Tools for Switch-Level Enforcement

For teams that want policy enforced on the switches that connect devices, these tools fit best:

1. Elisity: Runs Virtual Edge components on supported Cisco, Juniper, Arista, HPE Aruba, and Hirschmann switches and enforces policy there without endpoint agents.
2. Ordr: Applies policy through switches from Cisco, Aruba, and Juniper, alongside firewalls and NACs.
3. Illumio: Generates switch ACLs through its Network Enforcement Node for supported Cisco Nexus and Arista switches.

Asimily has no switch-level enforcement of its own. It pushes policy through the NAC or firewall that already controls the network, so it fits teams that run one or plan to deploy one.

Best Microsegmentation Tools for Testing Policy Before Enforcement

For teams where an operations owner must see the effect of a policy before approving it, these tools fit best:

1. Asimily: Policy Simulation records which ports and services a proposed policy would block on real network traffic, and an Enforcement Plan lists each deployment step for review before anything is applied.
2. Elisity: Saves a policy as a simulation, then reviews the traffic it would permit or deny on its Policy Matrix before enforcement.
3. Ordr: Shows policy impact through a connection matrix with built-in simulation, and an analyst approves each policy before it is applied.

Asimily’s Continuous Segmentation then applies approved policy to new devices that match, so tested policy stays current as the network changes.

Also Evaluated

The following tools were also evaluated as part of this research without receiving numerical scores:

1. Akamai Guardicore Segmentation: Best for process-level microsegmentation of data center and cloud workloads.
2. Cisco Secure Workload: Best for enterprises that want workload segmentation inside an existing Cisco networking stack (Cisco).
3. Forescout: Best for organizations that want segmentation rooted in their own NAC (Forescout).
4. VMware vDefend (NSX): Best for organizations already running VMware infrastructure that want segmentation in the virtualization layer.
5. Zero Networks: Best for teams that want automated, agentless segmentation with MFA-gated access to administrative ports.
6. Zscaler: Best for Zscaler customers extending Zero Trust to branch and facility devices (SecurityWeek).

Bottom Line

Microsegmentation strategies must align with your sources of identity and authentication, primary asset types, and enforcement infrastructure. If your organization relies heavily on unagentable connected devices like IoT and OT, an agentless solution like Asimily provides comprehensive risk context and network-level policy simulation that lowers the risk of disrupting operations. For workloads centered in data centers or cloud environments, host-agent implementations like Illumio or ColorTokens excel. Evaluate your enforcement points, whether host-based, appliances, NACs, firewalls, or switches, and prioritize tools that allow thorough testing of rules before activation.

Frequently Asked Questions (FAQ)

What Is the Best Microsegmentation Tool in 2026?

Asimily ranks first here at 2.8 out of 3.0, followed by Elisity (2.2), ColorTokens (2.1), and Illumio and Ordr (tied at 1.9). Asimily leads on asset and risk context and on threat and response. The right choice depends on what you must segment: Illumio and ColorTokens fit servers and cloud workloads, Elisity fits switch-based enforcement, and Asimily fits devices that cannot run an agent. Asimily publishes this ranking.

What Is the Identity-Based Microsegmentation Tool for IoT?

In this ranking, Asimily scores highest among agentless tools for IoT and OT devices, ahead of Elisity, which enforces on supported switches. Because connected devices and cameras cannot run host agents, Asimily builds device-level policy without software agents and enforces rules natively through existing network access control (NAC) platforms and firewalls.

What Is a Microsegmentation Tool?

A microsegmentation tool limits each asset, or a small group of assets, to the connections its function requires, then enforces that limit through host agents, NACs, firewalls, or switches. For example, a badge reader would reach only its access control server. Limiting each asset this way stops one compromised device from reaching the rest of its zone. Asimily builds device-level policy from its inventory of IoT, OT, and IT assets.

What Is the Difference Between Agent-Based and Agentless Microsegmentation?

Agent-based microsegmentation installs software on each server or workload to enforce policy locally, while agentless tools enforce in the network through NACs, firewalls, switches, or an inline appliance. Host agents suit servers and cloud workloads. Cameras, controllers, and badge readers that cannot take software need network enforcement, so many programs use both. Asimily is agentless and enforces through the NAC and firewall infrastructure a team already runs.

Can Microsegmentation Be Tested Before It Is Enforced?

Yes. Most microsegmentation tools offer a simulation mode that shows which connections a policy would block before enforcement, so operations owners can review the effect first. Simulation is only as useful as its traffic, so teams typically run it long enough to catch monthly or seasonal flows, which reduces the risk of an unplanned outage. Asimily’s Policy Simulation records the ports and services a proposed policy would block on real network traffic.

Why Do Microsegmentation Projects Stall?

Microsegmentation projects usually stall between writing policy and enforcing it, often because the teams involved can’t agree on the risk. CISA’s 2025 guidance recommends a phased approach for this reason. Common causes are an incomplete inventory, no ranking of which assets come first, policy written in each tool’s own format, and operations teams that cannot see what a policy will break. Asimily uses ATT&CK Analysis to rank assets by exploitability and Policy Auto-Recommendation to suggest where to begin with specific policies (DACLs) that protect asset function and block known exploits from succeeding.

Does Microsegmentation Require Re-Addressing (Re-IPing) Devices?

Not always. Tools that enforce through host agents, NACs, firewalls, or switch software usually leave device addresses alone, and Elisity states that its approach needs no re-addressing (Elisity). Inline appliances can differ: devices behind a ColorTokens Gatekeeper appliance take a new netmask and use the appliance as their gateway (ColorTokens). Asimily enforces through existing NACs and firewalls, so devices keep their IP addresses.

How Much Does a Microsegmentation Tool Cost?

Most microsegmentation tools are priced by quote. ColorTokens is an exception: in November 2026, its Xshield listing on AWS Marketplace showed $40 per OT or IoT device and $360 per server per year, plus a $36,000 implementation line item for OT and IoT devices. Asimily pricing is quoted per deployment.

See how Asimily turns device risk into tested, enforced microsegmentation policy

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