ioSENTRIX vs UnderDefense
UnderDefense runs penetration tests with certified ethical hackers and retests the same assets at no extra cost after you fix findings. ioSENTRIX's own testers run scoped pentests with free retests and audit support, and CTEM keeps watching between tests with continuous SAST, DAST, SCA, SBOM and attack surface monitoring.
Penetration Testing Solution of the Year2026 CyberSecurity Breakthrough Awards
4.9 / 512 reviews on G2
5.0 / 5on Clutch
CREST-accreditedPenetration testingioSENTRIX or UnderDefense: which should you choose?
It depends on how you want testing delivered. Here is our honest read of who each provider suits, based on what each company publishes.
- You need a pentest report for SOC 2, ISO 27001, PCI DSS or HIPAA, and want us to work with your auditor until it is accepted.
- You want a fixed price that only changes if the scope does, with every fix retested for free.
- You want more than a yearly pentest: continuous SAST, DAST, SCA, SBOM and attack surface monitoring between tests, from the same team.
- You want ioSENTRIX's own testers on every engagement, including specialist targets like IoT, POS, ICS/OT and AI.
- You want a published starting price before you talk to sales.
- You want a free retest of the same assets after you fix findings.
- You want cloud, web, mobile, IoT, wireless and social engineering tests from one provider.
Something here out of date? Tell us and we'll correct it.
ioSENTRIX vs UnderDefense at a glance
How UnderDefense describes itself: Pen testing services run by certified ethical hackers.
(UnderDefense, Penetration Testing Services page).
| Area | ioSENTRIX | UnderDefense |
|---|---|---|
| Who tests | ioSENTRIX's own testers, never a crowd or freelancers | Certified ethical hackers (CEH, OSCP, OSCE) |
| Delivery model | Scoped pentests on a PTaaS subscription or with credits, plus CTEM between tests | Scoped engagements; reports are kept in its MAXI platform |
| Continuous testing | CTEM: continuous SAST, DAST, SCA and SBOM, EASM and CAASM, network security and recurring pentests | Recommends pentests "at least once a year" |
| Retesting | Every fix retested, free | Retests "the same assets at no extra cost" |
| Pricing model | Fixed price unless the scope changes | "Engagements start at $5,000 for an external perimeter test" |
| Audit support | Works with your auditor until the report is accepted | Not stated on the pages we reviewed |
| Specialist targets | IoT and embedded, POS, ICS/OT, thick client, AI and LLM applications | IoT and wireless |
| Accreditations | CREST-accredited for penetration testing, ISO 27001 certified, SOC 2 Type 2 attested | Tester certifications (CEH, OSCP, OSCE); no company accreditation stated |
Where ioSENTRIX is different
Four commitments we make on every engagement.
Our own testers
Every engagement is run by ioSENTRIX testers, never a crowd or freelancers. The person who found an issue walks your engineers through it.
Free retest of every fix
We retest each fix and update the report, so the evidence you give your auditor shows the issue closed.
A fixed price
You agree the scope once. The price only moves if the scope does.
We stay until sign-off
We answer your auditor's questions on the report until it is accepted.
A pentest is a snapshot. CTEM keeps watching.
Most teams compare pentest providers. With ioSENTRIX, the same team that runs your pentest keeps testing between engagements through continuous threat exposure management (CTEM).
Code
SAST on every change, SCA for vulnerable dependencies, and an SBOM for each release.
Running apps
Managed DAST against your web apps and APIs.
Attack surface
EASM finds what's exposed to the internet; CAASM keeps the asset inventory current.
Network
Managed vulnerability scanning and network security testing.
Pentests
Expert-led tests on the riskiest changes, with every fix retested.
Recognised by judges, rated by clients
Award · 2026Penetration Testing Solution of the YearCyberSecurity Breakthrough AwardsG2 · High Performer, Fall 20264.9 / 5from 12 reviewsClutch · Premier Verified5.0 / 5Clutch profileAccreditationCREST-accreditedPenetration testing
ISO 27001 certified · SOC 2 Type 2 attested · report available from our trust centerUnlike other providers, Omair and his team truly dive deep into our infrastructure, delivering findings that go well beyond the surface level.
We were impressed with ioSENTRIX's ability to independently validate the security of our customer-facing product.
The team at ioSENTRIX is professional and highly skilled at their craft.
What moving to ioSENTRIX looks like
You don't have to wait for a renewal to compare results. A typical web application test takes one to two weeks.
- Step 1
Scoping call
Share your last report and asset list. We agree the scope and a fixed price.
- Step 2
Baseline test
We test the same scope, so you can compare the results like for like.
- Step 3
Fix and retest
Your team fixes the findings. We retest every fix for free and update the report.
- Step 4
Auditor hand-off
We work with your auditor until the report is accepted, then CTEM keeps watching.
Frequently asked questions
Short answers for teams comparing ioSENTRIX and UnderDefense.
Ask us something elseIs ioSENTRIX a good alternative to UnderDefense?
For teams that want audit-ready pentests by a firm's own testers at a fixed price, with free retests and continuous testing between pentests, yes. UnderDefense suits teams that want a published starting price and a free retest.
What is the main difference between ioSENTRIX and UnderDefense?
UnderDefense is a firm whose own experts run the work. ioSENTRIX's own testers run every engagement, every fix is retested for free, the price is fixed unless the scope changes, and CTEM adds continuous SAST, DAST, SCA, SBOM and attack surface monitoring.
Does ioSENTRIX offer continuous testing like UnderDefense?
Yes, through continuous threat exposure management (CTEM): continuous SAST, DAST, SCA and SBOM, external attack surface monitoring (EASM), asset inventory (CAASM), network security and recurring pentests, run by the same ioSENTRIX team.
Who actually runs the tests at ioSENTRIX?
ioSENTRIX's own testers run every engagement. We don't use a crowd or freelancers.
How is ioSENTRIX priced compared with UnderDefense?
ioSENTRIX sells testing on a PTaaS subscription or with credits, at a fixed price unless the scope changes. For UnderDefense, the pages we reviewed say: Engagements start at $5,000 for an external perimeter test. Ask both for a quote on the same scope.
Is ioSENTRIX CREST accredited?
Yes. ioSENTRIX is CREST-accredited for penetration testing, ISO 27001 certified and SOC 2 Type 2 attested. It was named Penetration Testing Solution of the Year in the 2026 CyberSecurity Breakthrough Awards.
How we compared
We compared what each company publishes on its own website, checked on 10 November 2026. We quote competitors in their own words. Where something isn't published, we say so rather than guess.
UnderDefense and their product names are trademarks of their owners. ioSENTRIX isn't affiliated with any of them. If anything here is out of date, tell us and we'll correct it.
- 1. UnderDefense, Penetration Testing Services page, underdefense.com/services/penetration-testing, checked 10 November 2026
- 2. G2 and Clutch, ioSENTRIX reviews, checked 10 November 2026
- 3. CyberSecurity Breakthrough Awards 2026 winners, GlobeNewswire, 8 October 2026
