Tesorion vs UnderDefense
Tesorion is a Services firm that works with your existing tools. UnderDefense is a Pure-play MDR that works with your existing tools. Tesorion targets Mid-market and Enterprise organizations; UnderDefense serves Mid-market and Enterprise. Tesorion includes 4 attack surfaces in base pricing (Endpoint, Cloud, Identity, Network), compared to 5 for UnderDefense (Endpoint, Cloud, SaaS, Identity, Network).
Buyer brief
Tesorion is a Services firm that works with your existing tools. UnderDefense is a Pure-play MDR that works with your existing tools. Tesorion targets Mid-market and Enterprise organizations; UnderDefense serves Mid-market and Enterprise. Tesorion includes 4 attack surfaces in base pricing (Endpoint, Cloud, Identity, Network), compared to 5 for UnderDefense (Endpoint, Cloud, SaaS, Identity, Network).
Tesorion (Services firm) and UnderDefense (Pure-play MDR) serve different buyer profiles. Your decision depends on whether you prioritize Tesorion's tesorion mdr fits dutch buyers that want local mdr delivered through t-soc and backed by t-cert, ... or UnderDefense's works on top of your existing stack and keeps data in your infrastructure.
At a glance
| FIELD |  |  |
|---|---|---|
| Best fit | Dutch organisations that want MDR from a Netherlands-based cybersecurity services firm | Mid-market teams with existing EDR/SIEM that want MDR layered on top without ripping and replacing |
| Price | Custom quote | From $11/device/mo; annual MDR contract |
| Response authority | 1/6 actions · Configurable | 6/6 actions · Configurable |
| Stack | Works with existing stack | Works with existing stack |
| Data access | Reports only | Full query access |
| Warranty | None listed | $1,000,000 |
- Best fit
- Dutch organisations that want MDR from a Netherlands-based cybersecurity services firm
- Price
- Custom quote
- Response authority
- 1/6 actions · Configurable
- Stack
- Works with existing stack
- Data access
- Reports only
- Warranty
- None listed
- Best fit
- Mid-market teams with existing EDR/SIEM that want MDR layered on top without ripping and replacing
- Price
- From $11/device/mo; annual MDR contract
- Response authority
- 6/6 actions · Configurable
- Stack
- Works with existing stack
- Data access
- Full query access
- Warranty
- $1,000,000
›› Detailed comparison
| FIELD | TesorionTECH-AGNOSTIC | UnderDefenseTECH-AGNOSTIC |
|---|---|---|
| ›› Fit | ||
| Target size | Mid-market, Enterprise | Mid-market, Enterprise |
| Sentiment | Mixed | Positive |
| ›› Your stack | ||
| Approach | Works with your tools | Works with your tools |
| EDR integrations | Customer endpoint telemetry SentinelOne | CrowdStrikeMicrosoft Defender SentinelOne |
| SIEM integrations | None listed | SplunkMicrosoft SentinelElastic |
| Coverage | EPEndpoint: CoveredCloudCloud: CoveredIDIdentity: CoveredSaaSSaaS: LimitedNetNetwork: CoveredOTOT/IoT: Optional add-on | EPEndpoint: CoveredCloudCloud: CoveredIDIdentity: CoveredSaaSSaaS: CoveredNetNetwork: CoveredOTOT/IoT: Optional add-on |
| ›› Response | ||
| Response type | Active Remediation | Active Remediation |
| Approval policy | Configurable | Configurable |
| Response actions | Custom playbooks | IsolateKill processContainDisable accountsQuarantineCustom playbooks |
| IR included | Separate | Separate |
| ›› Cost | ||
| Price range | Not published | Starts at $11/device/month (vendor-published) |
| Minimum seats | None | None |
| Breach warranty | – | $1,000,000 |
| ›› More details | ||
| Requires own agent | No | No |
| Endpoints | ✓ Included | ✓ Included |
| Cloud workloads | ✓ Included | ✓ Included |
| Identity | ✓ Included | ✓ Included |
| SaaS apps | ~ Limited | ✓ Included |
| Network | ✓ Included | ✓ Included |
| OT/ICS | + Optional | + Optional |
| Threat hunting | ✓ Included | ✓ Included |
| Response SLA | Not disclosed | Not disclosed |
| 24/7 coverage | ✓ | ✓ |
| Pricing model | Custom quote. Tesorion does not publish MDR package pricing. | Per-device pricing, vendor-agnostic (same rate for all asset types) |
| Hidden cost warnings | Public pages do not publish response SLAs or named default response actions.. The public MDR page says mitigation is immediate where possible, but does not specify what Tesorion can do without customer approval.. T-CERT incident response is prominent, but buyers should confirm whether IR hours are included in MDR or sold separately.. Tesorion lists broad coverage across domains, so buyers should confirm which monitored sources are included in base MDR. | $11/device is a starting price for marketing. Actual cost varies by scope, and annual contract is required.. 3-year contract required for $1M breach warranty. Not available on 1-year deals.. IR retainer is separate from MDR. $0 upfront but billed per-incident, so budget for breach costs on top of subscription.. Custom integrations beyond pre-built connectors may require professional services fees. |
| Data portability | Partial | Full |
| Contract terms | Custom | Annual |
| Channels | EmailPhone | SlackTeamsEmailPortalPhone |
| Data access | Reports only | Full query access |
| Dedicated analyst | – | ✓ |
| SOC regions | Europe | North AmericaEurope |
| Onboarding | Tesorion says MDR use cases are tailored per organisation and linked to mitigating measures. No standard public onboarding duration was found. | 30 days |
| Industry focus | Financial ServicesHealthcarePublic SectorManufacturingCritical InfrastructureTechnologyProfessional Services | ManufacturingHealthcareFinancial Services |
| MTTD | Not published | Not published |
| MTTR | Not published | Not published |
| Community view | Tesorion has limited MDR-specific public review volume. The public buyer case rests on Dutch delivery, T-SOC operations, XDR and SOAR correlation, threat intelligence and nearby T-CERT incident response. Buyers should validate pricing, response authority, included source scope and whether T-CERT support is included before signing. | Gartner Peer Insights 4.9/5 (7 reviews). G2 shows 5/5 but across only 31 total reviews for all products. 66 reviews on Clutch with strong ratings. PeerSpot mindshare is 0.0% in the MDR category. No Reddit or independent practitioner forum discussion found. |
| Compliance | ISO 27001NEN 7510NIS2DORABIO | SOC 2 Type IIISO 27001HIPAAPCI DSS |
| Certifications | ISO 27001NEN 7510 | SOC 2 Type IIISO 27001Splunk certificationsGIACOSCP |
| Founded | 2018 | 2017 |
| Data retention | Not published as a standard MDR retention period. | Determined by customer's existing SIEM. UnderDefense does not store raw logs, data lives in customer infrastructure. |
| API available | – | ✓ |
| Website | Visit → | Visit → |
›› FAQ
What is the main difference between Tesorion and UnderDefense?
Tesorion is a Services firm that is technology-agnostic (works with your existing tools). UnderDefense is a Pure-play MDR that is technology-agnostic (works with your existing tools). Tesorion covers 4 attack surfaces in base pricing vs. 5 for UnderDefense.
How do Tesorion and UnderDefense differ in response capabilities?
Tesorion supports 1 autonomous actions (custom playbooks) and approval is configurable. UnderDefense supports 6 autonomous actions (account disable, custom playbooks, endpoint isolation, file quarantine, network containment, process termination) and approval is configurable.
How does Tesorion pricing compare to UnderDefense?
Tesorion pricing: Not published. UnderDefense pricing: Starts at $11/device/month (vendor-published). Watch for with Tesorion: Public pages do not publish response SLAs or named default response actions.; The public MDR page says mitigation is immediate where possible, but does not specify what Tesorion can do without customer approval.. Watch for with UnderDefense: $11/device is a starting price for marketing. Actual cost varies by scope, and annual contract is required.; 3-year contract required for $1M breach warranty. Not available on 1-year deals..
Should I choose Tesorion or UnderDefense?
Choose Tesorion if: dutch organisations that want MDR from a Netherlands-based cybersecurity services firm. Choose UnderDefense if: mid-market teams with existing EDR/SIEM that want MDR layered on top without ripping and replacing. Tesorion is not ideal for buyers that need public MDR pricing or contractual response SLAs before sales engagement. UnderDefense is not ideal for organizations that require independently validated detection metrics (MITRE, Forrester, etc.) before committing.
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.