CISO Tribune

Vendor comparison · 2 companies

eSentire vs UnderDefense

eSentire sells MDR with multi-signal attack surface coverage and 24/7 Elite threat hunters working as one continuous security program across any vendor stack. eSentire offers 24/7 SOC-as-a-Service with unlimited threat hunting and incident handling. eSentire describes Multi-Signal MDR with 300+ technology integrations to support existing investments. UnderDefense sells UnderDefense MAXI, a security and compliance automation platform, and an MDR service in which security experts monitor, detect and respond to incidents. CISO Tribune files both under MDR and managed SOC. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

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  • eSentire
  • UnderDefense
eSentire vs UnderDefense: Products, Customers and Funding Compared
eSentireeSentire sells MDR with multi-signal attack surface coverage and 24/7 Elite threat hunters working as one continuous security program across any vendor stack. eSentire offers 24/7 SOC-as-a-Service with unlimited threat hunting and incident handling. eSentire describes Multi-Signal MDR with 300+ technology integrations to support existing investments.esentire.comUnderDefenseUnderDefense sells UnderDefense MAXI, a security and compliance automation platform, and an MDR service in which security experts monitor, detect and respond to incidents.underdefense.com
What it sells
  • Atlas Preempt[3][5]Deploys AI Operatives to continuously validate attack paths.
  • Atlas MDR[5]MDR sold in Professional, Enhanced and Elite packages.
  • 24/7 SOC-as-a-Service[5]24/7 SOC-as-a-Service with unlimited threat hunting and incident handling.
  • UnderDefense MAXI[1][2][3][5][6]A security and compliance automation platform. UnderDefense MAXI integrates with SIEMs, firewalls and endpoint protection solutions.
  • UnderDefense Agentic AI SOC[4]AI agents investigate each alert. Analysts on shift 24/7 decide what happens next.
  • MDR[1][2][6]Security experts monitor, detect and respond to incidents.
  • Cloud-based SIEM[2]A cloud-based SIEM that collects, analyzes and responds to security events.
  • CIS AWS Benchmark assessment[8]A self-service assessment of AWS security.
Categories
Headquarters
Canada[2]Not stated on its pages
Founded
2001[2][5]Not stated on its pages
Ownership and funding
Not stated on its pagesNot stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • September 15, 2026eSentire announced it acquired a stealth-mode AI security startup and incorporated its product and technology into the Atlas Platform as Atlas AIDR.[6]
Not stated on its pages
G2 and Gartner Peer Insights
  • G2: listed, seen November 3, 2026[4]
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 10, 2026[10]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, the company sells mainly to organisations that want to extend their own team with a 24/7 Security Operations Center. Its industry pages speak of protecting insurance operations, defending financial services, defending patient data and clinical operations, protecting portfolio companies, and stopping threats before they disrupt production. The pages also say Atlas connects to any signal across your current security tools, which reads as a fit for teams that already run security tools. The security operations center entry names boards, regulators, and cyber insurers as parties that require a human accountability layer.UnderDefense MAXI integrates with a customer's security infrastructure, including SIEMs, firewalls and endpoint protection solutions. UnderDefense offers compliance templates to organizations working toward standards such as SOC2 and ISO 27001. UnderDefense MAXI provides executive-level reports for C-level readers.
Last verified
November 2, 2026October 26, 2026

Where they overlap

  • MDR and managed SOC is the primary category of both eSentire and UnderDefense.

Where they differ, field by field

  • eSentire is also filed under Incident response and forensics and Exposure prioritisation and CTEM. UnderDefense is also filed under Penetration testing and red team services, Compliance automation and SOAR and security automation.
  • eSentire lists Atlas Preempt, Atlas MDR and 24/7 SOC-as-a-Service. UnderDefense lists UnderDefense MAXI, UnderDefense Agentic AI SOC, MDR, Cloud-based SIEM and CIS AWS Benchmark assessment.
  • eSentire is headquartered in Canada.
  • eSentire was founded in 2001.

How they differ

CISO Tribune files both eSentire and UnderDefense under MDR and managed SOC as the primary category. The managed offering from eSentire is Atlas MDR, sold in Professional, Enhanced and Elite packages. Alongside it, eSentire sells a 24/7 SOC-as-a-Service and Atlas Preempt, which deploys AI Operatives to continuously validate attack paths. UnderDefense sells an MDR service run by security experts and the UnderDefense Agentic AI SOC, where AI agents investigate each alert and analysts on shift 24/7 decide what happens next. UnderDefense also sells UnderDefense MAXI, a security and compliance automation platform, along with a cloud-based SIEM and a self-service CIS AWS Benchmark assessment.

Both vendors describe working with existing tools, as eSentire cites 300+ technology integrations and UnderDefense MAXI integrates with SIEMs, firewalls and endpoint protection solutions. On compliance, UnderDefense offers pre-built policy templates, compliance automation, vCISO support and guidance through every step of the audit. The headquarters of eSentire is in Canada, and the company was founded in 2001.

The company eSentire names insurance, financial services, portfolio companies, dealerships, and public sector and education among the sectors it protects, and says it serves thousands of organizations across 35+ industries. UnderDefense says it serves organizations across five continents in multiple industries. Working with the Computer Emergency Response Team of Ukraine (CERT-UA), UnderDefense participated in a series of Incident Response cases. On September 15, 2026, eSentire announced it acquired a stealth-mode AI security startup and folded its product and technology, now called Atlas AIDR, into the Atlas Platform.

What it sells: eSentire

What Atlas MDR does[5]
Atlas MDR comes in three packages, Professional, Enhanced and Elite, so a customer can choose the level of 24/7 coverage, log retention, threat hunting and offensive testing. One package adds log detection, Atlas SIEM with 90-day retention, round-the-clock threat hunting, automated response, and quarterly offensive testing.

What it sells: UnderDefense

What UnderDefense MAXI does[1][2][3][5][6]
UnderDefense MAXI natively monitors endpoints, networks, users and decoy beacons. UnderDefense MAXI provides ready-to-use playbooks, AI-powered alert enrichment and notifications through Slack, Jira or a preferred tool. UnderDefense MAXI provides pre-built compliance templates for standards such as SOC2 and ISO 27001.
What UnderDefense Agentic AI SOC does[4]
UnderDefense Agentic AI SOC uses AI agents that investigate each alert. Analysts on shift 24/7 decide what happens next.
What CIS AWS Benchmark assessment does[8]
UnderDefense offers a self-service CIS AWS Benchmark assessment. The assessment covers evaluating the maturity of cloud security controls, identifying misconfigurations, providing detailed mitigation instructions and giving a summary table with a final CVSS v3.0 score.

Questions about eSentire and UnderDefense

What do eSentire and UnderDefense sell?
eSentire sells Atlas Preempt, Atlas MDR and 24/7 SOC-as-a-Service. UnderDefense sells UnderDefense MAXI, UnderDefense Agentic AI SOC, MDR, Cloud-based SIEM and CIS AWS Benchmark assessment.
Are eSentire and UnderDefense in the same category?
Yes. MDR and managed SOC is the primary category of both on CISO Tribune.
Where are eSentire and UnderDefense headquartered?
eSentire is headquartered in Canada.
When were eSentire and UnderDefense founded?
eSentire was founded in 2001.
Who are eSentire and UnderDefense sold to?
From its own pages, the company sells mainly to organisations that want to extend their own team with a 24/7 Security Operations Center. UnderDefense MAXI integrates with a customer's security infrastructure, including SIEMs, firewalls and endpoint protection solutions.
What have eSentire and UnderDefense announced recently?
September 15, 2026: eSentire announced it acquired a stealth-mode AI security startup and incorporated its product and technology into the Atlas Platform as Atlas AIDR.

About eSentire

eSentire sells MDR with multi-signal attack surface coverage and 24/7 Elite threat hunters working as one continuous security program across any vendor stack. eSentire offers 24/7 SOC-as-a-Service with unlimited threat hunting and incident handling. eSentire describes Multi-Signal MDR with 300+ technology integrations to support existing investments.[1]

Atlas connects to any signal across any vendor stack and powers adaptive AI Operatives that expose, detect, and neutralize cyberattacks. Atlas connects to any signal across a customer's current security tools, and eSentire says that whatever a customer is running, eSentire is running with them. Atlas Preempt deploys AI Operatives to continuously validate attack paths exposing attacker targets of opportunity before they take advantage.

eSentire says its SOC extends a customer's team with immediate expertise, hands-on remediation, and the human accountability layer that boards, regulators, and cyber insurers require. eSentire says customers can see what its SOC sees, review investigations, and see how eSentire is protecting their business. Response and Remediation pairs machine-speed containment with human judgment, delivering full threat response that is policy-bounded, reversible, and explainable. eSentire offers unlimited Incident Response with a threat suppression guarantee, anytime, anywhere.

Atlas MDR comes in three packages, Professional, Enhanced and Elite, so a customer can choose the level of 24/7 coverage, log retention, threat hunting and offensive testing. In that package, eSentire analysts watch the customer's environment around the clock.

eSentire says it protects thousands of organizations across 35+ industries around the world. eSentire was founded in 2001, and its Controlled Autonomy SecOps operating model pairs agentic AI operatives with engineered human-judgment controls. eSentire provides cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). eSentire is the official cybersecurity partner of AVFC.

eSentire sets out to protect insurance operations from cyber attacks. eSentire sets out to defend financial services from cyber disruption. eSentire sets out to protect portfolio companies from cyber risk. eSentire sets out to defend patient data and clinical operations. eSentire sets out to secure dealership operations and customer data. eSentire sets out to protect public sector and education systems.

eSentire on the record

Sources

eSentire full record

  1. [1]Esentire managed detection and responseeSentire · esentire.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]Security You Can Trust. Protecting Organizations Worldwide. | eSentireeSentire · undated page, accessed September 27, 2026 · Tier A
  3. [3]Company | eSentireeSentire · undated page, accessed October 24, 2026 · Tier A
  4. [4]eSentire Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 24, 2026 · Tier C
  5. [5]Managed Detection and Response Pricing and Packaging | eSentireeSentire · undated page, accessed November 3, 2026 · Tier A
  6. [6]eSentire Acquires Stealth-Mode AI Security Startup, Bringing New AI Observability and Control to the Atlas PlatformBusiness Wire · published September 15, 2026 · Tier A

UnderDefense full record

  1. [1]underdefense.comUnderDefense · underdefense.com · undated page, accessed October 26, 2026 · Tier A
  2. [2]Compliance PricingUnderDefense · undated page, accessed November 10, 2026 · Tier A
  3. [3]Agentic AI SOC & Compliance Automation Platform | UnderDefenseUnderDefense · undated page, accessed November 10, 2026 · Tier A
  4. [4]Elastic Cloud Pricing 2026: Serverless, Hosted, and SIEMUnderDefense · undated page, accessed November 10, 2026 · Tier A
  5. [5]Cloudflare Pricing 2026: WAF, Zero Trust, and EnterpriseUnderDefense · undated page, accessed November 10, 2026 · Tier A
  6. [6]Palo Alto Networks Pricing 2026: Firewalls, SASE, and XDRUnderDefense · undated page, accessed November 10, 2026 · Tier A
  7. [7]2025 MXDR Pricing Guide: Choosing the Right MXDR providerUnderDefense · undated page, accessed November 10, 2026 · Tier A
  8. [8]Episode 4: Cyber Resilience 201 — AWS Cloud Security - UnderDefenseUnderDefense · undated page, accessed November 10, 2026 · Tier A
  9. [9]E-Mail Under Attack - UnderDefenseUnderDefense · undated page, accessed November 10, 2026 · Tier A
  10. [10]UnderDefense MAXI Reviews & Product DetailsG2 · undated page, accessed November 10, 2026 · Tier C

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