Quorum Cyber vs SISA ProACT
Quorum Cyber is a Microsoft-ecosystem that works with your existing tools. SISA ProACT is a Services firm that works with your existing tools. Quorum Cyber targets SMB, Mid-market, and Enterprise organizations; SISA ProACT serves Mid-market and Enterprise. Quorum Cyber includes 4 attack surfaces in base pricing (Endpoint, Cloud, SaaS, Identity), compared to 0 for SISA ProACT ().
Buyer brief
Quorum Cyber is a Microsoft-ecosystem that works with your existing tools. SISA ProACT is a Services firm that works with your existing tools. Quorum Cyber targets SMB, Mid-market, and Enterprise organizations; SISA ProACT serves Mid-market and Enterprise. Quorum Cyber includes 4 attack surfaces in base pricing (Endpoint, Cloud, SaaS, Identity), compared to 0 for SISA ProACT ().
Quorum Cyber (Microsoft-ecosystem) and SISA ProACT (Services firm) serve different buyer profiles. Your decision depends on whether you prioritize Quorum Cyber's the strongest microsoft-native mdr option with a tiered model spanning smb to enterprise, backed ... or SISA ProACT's sisa proact fits payment-sector buyers that want mdr tied to forensics, pci expertise and ai-assi....
At a glance
| FIELD |  |  |
|---|---|---|
| Best fit | SMBs needing affordable 24/7 MDR via Clarity Defend, with a growth path to enterprise-grade Protect tier | Regulated organizations that need MDR plus PCI, payment forensics and incident-response depth from the same provider |
| Price | Custom quote | Custom quote |
| Response authority | 6/6 actions · Configurable | 2/6 actions · Configurable |
| Stack | Works with existing stack | Works with existing stack |
| Data access | Full query access | Reports only |
| Warranty | None listed | None listed |
- Best fit
- SMBs needing affordable 24/7 MDR via Clarity Defend, with a growth path to enterprise-grade Protect tier
- Price
- Custom quote
- Response authority
- 6/6 actions · Configurable
- Stack
- Works with existing stack
- Data access
- Full query access
- Warranty
- None listed
- Best fit
- Regulated organizations that need MDR plus PCI, payment forensics and incident-response depth from the same provider
- Price
- Custom quote
- Response authority
- 2/6 actions · Configurable
- Stack
- Works with existing stack
- Data access
- Reports only
- Warranty
- None listed
Detailed comparison
| FIELD | Quorum CyberTECH-AGNOSTIC | SISA ProACTTECH-AGNOSTIC |
|---|---|---|
| Fit | ||
| Target size | SMB, Mid-market, Enterprise | Mid-market, Enterprise |
| Sentiment | Positive | Mixed |
| Your stack | ||
| Approach | Works with your tools | Works with your tools |
| EDR integrations | Microsoft Defender | Customer EDR |
| SIEM integrations | Microsoft Sentinel | Customer SIEM |
| Coverage | EPEndpoint: CoveredCloudCloud: CoveredIDIdentity: CoveredSaaSSaaS: CoveredNetNetwork: LimitedOTOT/IoT: Optional add-on | EPEndpoint: LimitedCloudCloud: LimitedIDIdentity: LimitedSaaSSaaS: LimitedNetNetwork: LimitedOTOT/IoT: Not covered |
| Response | ||
| Response type | Active Remediation | Active Remediation |
| Approval policy | Configurable | Configurable |
| Response actions | IsolateKill processContainDisable accountsQuarantineCustom playbooks | Disable accountsCustom playbooks |
| IR included | Separate | Separate |
| Cost | ||
| Price range | Not published. Contact for custom quote. | Not published |
| Minimum seats | None | None |
| Breach warranty | – | – |
| More details | ||
| Requires own agent | No | No |
| Endpoints | ✓ Included | ~ Limited |
| Cloud workloads | ✓ Included | ~ Limited |
| Identity | ✓ Included | ~ Limited |
| SaaS apps | ✓ Included | ~ Limited |
| Network | ~ Limited | ~ Limited |
| OT/ICS | + Optional | Not offered |
| Threat hunting | ✓ Included | ✓ Included |
| Response SLA | Not disclosed | Not disclosed |
| 24/7 coverage | ✓ | Business hours |
| Pricing model | Not published. Described as 'flexible subscription model' with pricing based on environment size and risk profile. | Custom quote. SISA does not publish ProACT MDR package pricing. |
| Hidden cost warnings | Requires Microsoft licensing (E3/E5 or standalone Defender licenses) as a prerequisite. These costs are separate and can be significant.. Microsoft Sentinel consumption costs are usage-based and billed separately by Microsoft. Data ingestion charges can spike unpredictably.. Identity coverage (ITDR) and data security (Clarity Data) are separate services at lower tiers. AWS and GCP coverage only available in Clarity Protect (top tier) | Public pages do not publish MDR pricing, contract minimums or service-credit language.. The service is heavily payment-security oriented, so non-payment buyers should confirm whether use cases fit their environment.. ProACT lists many stack components, including SIEM, EDR, CASB, UEBA, SOAR, threat hunting and dark web monitoring, so buyers should confirm which are included in the base quote.. Response automation is a major part of the pitch, so pre-approved SOAR actions and rollback rules should be documented before go-live.. DFIR and payment forensic services are adjacent SISA services, so buyers should confirm what investigation and response work is included in MDR. |
| Data portability | Full | Partial |
| Contract terms | Annual | Custom, ProACT Agentic SOC, ProACT MXDR, DFIR Retainer Services |
| Channels | PortalEmailPhone | Portal |
| Data access | Full query access | Reports only |
| Dedicated analyst | – | – |
| SOC regions | EuropeNorth America | |
| Onboarding | Not published | Not published. SISA says ProACT can use a customized and scalable stack with cloud and on-premise deployment options, but no standard onboarding duration was found. |
| Industry focus | Financial ServicesEducationPublic SectorManufacturingProfessional Services | PaymentsFintechFinancial Services |
| MTTD | Not published | Not published |
| MTTR | Not published | Not published |
| Community view | Named in the Gartner Market Guide for MDR as Representative Vendor (2024, 2025). Microsoft Security MSSP of the Year 2025. First UK Microsoft Verified MXDR provider. Very limited independent review data: no ratings on G2, PeerSpot, or Gartner Peer Insights with sufficient reviews. Zero Reddit presence. | No meaningful MDR-specific buyer-review signal was found in major English-language review communities during this pass. The public buyer case rests on SISA's payment-security focus, ProACT Agentic SOC, forensic intelligence, 1,000+ customer claim, 40+ country footprint and PCI forensic-investigation credentials. Buyers should validate pricing, SOC delivery model, response authority and non-payment use cases directly. |
| Compliance | SOC 2 Type IIISO 27001Cyber Essentials | PCI DSSPCI PINPCI 3DSPCI P2PEPCI S3PCI S-SLCPCI MPoCSWIFTGDPR |
| Certifications | SOC 2 Type IIISO 27001 (UKAS-level audit)CREST (Vulnerability Assessment, Pen Testing, CSIR)Cyber EssentialsMicrosoft Verified MXDR SolutionMicrosoft Solutions Partner for SecurityMicrosoft Security MSSP of the Year 2025Gartner Market Guide for MDR Representative Vendor (2024, 2025) | PCI Global Payment Forensic InvestigatorPCI Qualified Security AssessorPCI-recognized laboratory for MPoC security evaluationsPCI GEAR committee member |
| Founded | 2016 | 2006 |
| Data retention | Data resides in customer's own Microsoft Sentinel instance / Azure tenant. Retention governed by customer's Azure configuration. | SISA says ProACT supports PCI-compliant cloud deployments and on-premise options for data localization requirements, including custom Kubernetes and GCP environments. No standard public MDR retention period was found. |
| API available | – | – |
| Website | Visit → | Visit → |
FAQ
What is the main difference between Quorum Cyber and SISA ProACT?
Quorum Cyber is a Microsoft-ecosystem that is technology-agnostic (works with your existing tools). SISA ProACT is a Services firm that is technology-agnostic (works with your existing tools). Quorum Cyber covers 4 attack surfaces in base pricing vs. 0 for SISA ProACT.
How do Quorum Cyber and SISA ProACT differ in response capabilities?
Quorum Cyber supports 6 autonomous actions (account disable, custom playbooks, endpoint isolation, file quarantine, network containment, process termination) and approval is configurable. SISA ProACT supports 2 autonomous actions (account disable, custom playbooks) and approval is configurable.
How does Quorum Cyber pricing compare to SISA ProACT?
Quorum Cyber pricing: Not published. Contact for custom quote.. SISA ProACT pricing: Not published. Watch for with Quorum Cyber: Requires Microsoft licensing (E3/E5 or standalone Defender licenses) as a prerequisite. These costs are separate and can be significant.; Microsoft Sentinel consumption costs are usage-based and billed separately by Microsoft. Data ingestion charges can spike unpredictably.. Watch for with SISA ProACT: Public pages do not publish MDR pricing, contract minimums or service-credit language.; The service is heavily payment-security oriented, so non-payment buyers should confirm whether use cases fit their environment..
Should I choose Quorum Cyber or SISA ProACT?
Choose Quorum Cyber if: microsoft-committed organizations (E3/E5) wanting MDR built natively on Sentinel and Defender with data staying in their own Azure tenant. Choose SISA ProACT if: banks, payment processors, fintechs and payment ecosystem buyers that want MDR informed by forensic-investigation experience. Quorum Cyber is not ideal for organizations running CrowdStrike, SentinelOne, or any non-Microsoft primary EDR. Quorum Cyber is Microsoft-only.. SISA ProACT is not ideal for buyers that need public MDR pricing before sales.
Daylight Security
AI-native MDR for buyers comparing active remediation across endpoint, cloud, identity, and SaaS. Daylight works with existing EDR/SIEM stacks and uses ChatOps-native collaboration, so it can be a useful third reference point in this comparison.