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Last reviewed: 1 Jun 2026

ReliaQuest GreyMatter

Co-Managed SOC · XDR

ReliaQuest GreyMatter is a co-managed security-operations platform and service for enterprise teams that want ReliaQuest analysts, engineers and AI workflows to operate across the tools they already own. After an alert, GreyMatter can correlate, investigate and run approved response playbooks such as endpoint isolation or account disablement, while the buyer still owns the connected stack, telemetry quality, response authority and remediation outside the agreed workflows.

What they do
Co-manage the SOC
Works with
Your stack
Built for
Enterprise / Mid-Market
Price
AWS Marketplace lists a 12-month GreyMatter SIEM Integration Plus package at $226,000*
Best for
Enterprise and upper mid-market teams with existing SIEM, EDR, identity, cloud and network tools

They cover

  • Endpoints
  • Cloud Workloads
  • Identity & Access
  • Email
  • Network
  • SaaS Applications
  • OT/ICS

Your team still owns

  • Licensing and administering the SIEM, EDR, cloud, identity, email and network controls in scope
  • Connecting telemetry sources and keeping data quality high enough for GreyMatter to act
  • Deciding which automated playbooks are approved for endpoints, identities, cloud and network controls
  • Remediating root causes, restoring systems and handling business-owner decisions
  • Verifying whether OT, digital risk protection, phishing defense or other modules are included in the quote

Pricing

Line Figure
Published price AWS Marketplace lists a 12-month GreyMatter SIEM Integration Plus package at $226,000
Billing model Custom
Contract Not published
Onboarding Not published

Tradeoffs

Works well

  • Fits enterprises that want to keep existing security tools while adding a shared operating layer
  • Public evidence supports investigation, hunting, automation and containment, not only alert notification
  • AWS Marketplace gives a public procurement and pricing signal for at least one GreyMatter package
  • Review evidence is larger than many co-managed SOC providers, especially on Gartner

Watch out for

  • Public pricing points to an enterprise budget and may not fit smaller teams
  • Integration depth, EPS levels and playbook access need careful scoping before contract signature
  • The buyer still owns tool licensing, telemetry quality, approvals and business remediation
  • Some customer reviews mention setup complexity, learning curve, mobile-app friction and tuning limits

What buyers say

Alert noise

Not assessed

Transparency

Not assessed

Customers like

  • Gartner reviewers repeatedly cite cross-tool visibility, automated response playbooks and operational support
  • G2 reviewers describe investigation time savings across integrated tools and useful support from customer success or engineering teams
  • Reddit discussions include first-hand buyers who found GreyMatter useful for SOC visibility and SIEM cost control

Watch out for

  • Public reviews and Reddit threads repeatedly frame GreyMatter as expensive for smaller teams
  • Buyers should expect onboarding and log-source connection work before the platform can act well
  • Some reviewers want better mobile app behavior, reporting speed, rule control or UI polish

Reputation reads from public reviews, not vendor-published numbers.

Sources
Gartner Peer InsightsG2AWS Marketplace reviewsReddit GreyMatter discussion

Ask before buying

  1. Which response playbooks can ReliaQuest or GreyMatter run automatically versus only after approval?
  2. Which telemetry sources, integrations and EPS levels are included in the quoted package?
  3. Who owns detection changes, custom rules and tuning requests after onboarding?

Integrations

SplunkMicrosoft SentinelIBM QRadarDevoCrowdStrikeSentinelOneMicrosoft DefenderVMware Carbon BlackAWSAzureGCPOktaMicrosoft TeamsSlackMimecastCisco Secure FirewallDragosArmisNozomi

Editorial notes

Why co-managed SOC

GreyMatter is broader than alert forwarding because it combines platform workflow, ReliaQuest analysts, security engineering, AI investigation, threat hunting and response playbooks. It is still co-managed because official material keeps the buyer's team and existing tools at the center of the operating model.

Response boundary

Official automation pages support response playbooks for actions such as isolating endpoints, disabling compromised accounts and neutralizing threats across connected tools. Buyers should confirm approval rules, server exclusions and which actions are available for each integrated control.

Platform boundary

ReliaQuest describes GreyMatter as vendor-neutral and built to operate across current or future tools. That makes it a fit for enterprises with multi-vendor stacks, but it also means value depends on integration depth, telemetry quality and ongoing tuning.

Pricing boundary

AWS Marketplace lists a public 12-month package at $226,000 and says custom private offers are available. The public page does not make that price a complete enterprise subscription, so the profile treats it as an indicative marketplace signal.

Customer evidence

Gartner has a large public review base for GreyMatter and G2 has a smaller set of visible reviews. Repeated praise centers on cross-tool visibility, support and investigation time savings, while repeated caveats mention cost, setup effort, learning curve, mobile-app issues and tuning control.

Questions

Is ReliaQuest GreyMatter an MDR service?
GreyMatter can cover detection, investigation and response work, but this profile treats it as a co-managed security-operations platform because ReliaQuest positions the buyer's existing tools and team as the operating base. Buyers comparing MDR providers should confirm which telemetry sources, response actions and ReliaQuest analyst workflows are included in the quoted scope.
Can ReliaQuest contain threats for the buyer?
Yes, when the relevant tools and playbooks are connected and approved. Official pages describe playbooks that can isolate endpoints, disable compromised accounts and orchestrate actions across EDR, SIEM, cloud, identity and ticketing tools. Buyers should confirm approval rules and exclusions for high-impact systems.
Is ReliaQuest GreyMatter pricing public?
ReliaQuest direct pricing is custom. AWS Marketplace lists a 12-month GreyMatter SIEM Integration Plus and Ongoing Enablement package up to 2k EPS at $226,000 and also supports custom private-offer scoping.