Secure the front door. Email is where most attacks arrive — ZeroDwell Containment auto-runs unknown files in a virtual container by default — so ransomware and zero-days can’t harm the real system regardless of whether they’re detected. Contain first, zero dwell time, ‘no ransomware’.
Buy through TechBag
Same software. Better outcome — at no extra cost.
Free, vendor-neutral, 30 minutes
How it’s rated
Full scoreboard ↓Quick answer
Xcitium ZeroDwell Containment is a patented, preemptive endpoint-security technology that takes a fundamentally different approach to stopping malware: instead of trying to detect whether an unknown file is malicious (and inevitably missing some), it automatically runs every unknown, untrusted executable inside a lightweight virtual container by default — so unknown files can do their apparent work but cannot actually harm the system, no matter what they turn out to be. This is 'default-deny done safely': known-good files run normally, known-bad files are blocked, and — crucially — the dangerous unknowns (which is where novel malware, zero-days and ransomware hide) are contained and virtualised, so even if an unknown file is malicious, it can't encrypt your data, steal information or damage the system, because it's operating in isolation with no real access. The user isn't blocked or interrupted; they can use the file, but any harmful actions hit the container, not the real machine. Xcitium's tagline captures the promise: 'no ransomware' — because ransomware, which relies on running and encrypting real files, is contained before it can act. Xcitium (formerly Comodo Security Solutions, rebranded 2022, HQ in Bloomfield NJ, founder-led by Melih Abdulhayoglu) built its zero-trust platform on ZeroDwell — the 'zero dwell time' idea that threats have zero time to operate because they're contained from the moment they appear. It's the foundation beneath Xcitium's EDR, XDR, MDR and platform. Instead of 'detect then respond' (with the gap that lets threats through), ZeroDwell 'contains first'. TechBag scopes, licenses and supports it in INR/GST for Indian organisations.
This page covers ZeroDwell Containment — the core technology. The rest of the Xcitium platform:
Most product pages skip this. We start here — so you buy a capability, not a buzzword.
Preemptive containment — auto-run unknown files in a virtual container by default, so they can’t harm the system regardless of whether they’re detected as bad.
What consolidation actually replaces, dimension by dimension.
| Dimension | Unprotected / signature email | ZeroDwell Containment (Xcitium) |
|---|---|---|
| Unknown files | Allowed to run (default-allow) | Contained by default |
| Novel malware / zero-day | Runs until detected | Contained from moment one |
| Ransomware | Encrypts before detection | Contained — encrypts nothing real |
| Detection gap | Threats act in the window | No gap — zero dwell time |
| If detection misses | Breach | Still contained |
| Default-deny | Blocks legitimate work too | Contains — no blocking |
| User experience | Blocked / false positives | Not interrupted |
| The approach | Detect then respond | Contain first |
Xcitium is a differentiated challenger — strong containment-based prevention and value, not the deepest detection ecosystem of the leaders. Many use containment as prevention alongside detection tools. TechBag advises honestly.
Vendors love diagrams; buyers need to know what they’re actually operating. Here’s the whole platform, demystified.
Every executable gets a verdict: known-good files run normally, known-bad are blocked — and the unknowns (where novel threats hide) are handled differently: contained, not trusted, not blindly allowed.
Unknown, untrusted files automatically run inside a lightweight virtual container by default — so they can do their apparent work but their access to the real system (files, registry, memory) is virtualised and isolated.
If a contained file turns out to be malicious, its harmful actions — encrypting files, stealing data, damaging the system — hit the isolated container, not the real machine, so the threat is neutralised without ever detecting it as bad.
The user isn't blocked or interrupted — they can use the unknown file, which appears to run normally — so security doesn't disrupt work, unlike default-deny that blocks unknowns outright. Safe AND usable.
Because threats are contained from the moment they appear, they have zero 'dwell time' — zero time to operate, spread or cause harm — which is the core of Xcitium's prevention-first philosophy.
One agent on every machine, one console over all of them — modules attach without a second operational world.
ZeroDwell contains unknown files preemptively — harm hits the container, not the machine — the prevention-first foundation of the portfolio, and paired with the human firewall.
Every unknown, untrusted executable is automatically run inside a virtual container by default — no manual decision, no waiting for a verdict — so the dangerous unknowns (where novel malware hides) are contained from the first moment.
Contained files run in a lightweight virtual environment — their access to files, registry, memory and the system is virtualised — so their real impact is isolated while they appear to run normally to the user.
Achieves default-deny security (don't trust the unknown) without the usual downside of blocking legitimate unknown files — because unknowns are contained (and usable), not blocked. Safe by default, without the friction.
Ransomware relies on running and encrypting real files — but a contained ransomware sample encrypts only the virtual container, not your real data, so it's neutralised before it can act. Hence 'no ransomware'.
Because it contains unknowns rather than trying to detect them, it protects against novel, never-seen-before malware and zero-days that detection-based tools miss — the unknown is contained regardless of what it is.
Detection-based security has a gap — the time between a threat running and being detected/responded to, during which it can act. Containment removes this gap: the threat is contained from the start, with zero dwell time.
Contained unknowns are analysed (via cloud verdicting and threat intelligence) to reach a verdict — so genuinely good files are released to run normally, and confirmed-bad ones are handled, while containment protects throughout.
Users aren't blocked, quarantined or interrupted — unknown files run (contained) and appear normal — so security doesn't create the friction, false positives and helpdesk load of tools that block unknowns.
The containment runs lightly on endpoints — designed not to bog down machines — so protection doesn't come at the cost of performance, keeping users productive.
Protects Windows endpoints (where most malware and ransomware target) with the containment approach — the core of Xcitium's endpoint protection across the estate.
Strong prevention (contained threats can't cause a breach) supports compliance and cyber-insurance requirements — demonstrating a proactive control that stops ransomware and unknown malware.
ZeroDwell Containment is the patented foundation beneath Xcitium's EDR, XDR and MDR — so the whole platform is prevention-first: contain the unknown, then detect and respond to what's confirmed. Unique among endpoint vendors.
The overview, getting started, and protecting M365 email.
The zero-trust, containment approach.
Containment vs detection.
Want a live, India-context walkthrough on your own fleet?
Book a guided demo →Here’s what genuinely sets Xcitium ZeroDwell apart.
The fundamental problem ZeroDwell Containment solves is that detection-based security — the approach almost every endpoint tool uses — inevitably leaves a gap that threats slip through, and containment eliminates that gap entirely. How detection-based security works and fails: traditional and even modern endpoint protection (antivirus, and even AI/behaviour-based EDR) works by trying to determine whether a file or activity is malicious, and blocking or responding when it decides something is bad. This is fundamentally a detection problem, and it has an inherent, unavoidable gap: for a novel, never-seen-before threat (a zero-day, new ransomware, custom malware), the tool doesn't yet know it's bad — so at first, it lets it run (it hasn't detected it), and only detects and responds after the threat has started acting (once behaviour or signatures reveal it). During that window — between the threat running and being caught — the threat can act: begin encrypting files, steal data, establish persistence, spread. This 'dwell time' is where breaches happen. And detection is never perfect: some threats are missed entirely, and attackers specifically design malware to evade detection. So detection-based security, however good, always has this gap and these misses. ZeroDwell Containment takes a fundamentally different, gap-closing approach: rather than trying to detect whether an unknown file is malicious (and risking being wrong or slow), it contains every unknown by default — running it in a virtual container where it can't cause real harm regardless of what it is. So there's no gap: an unknown threat is contained from the first moment it appears (zero dwell time), and even if it's malicious, its harmful actions hit the container, not the real system — so it can't breach you, whether or not it's ever 'detected' as bad. This is a categorically different and, for the unknown-threat problem, more robust approach: you don't have to correctly detect the threat to be protected from it. For organisations worried about ransomware, zero-days and novel malware that evade detection, this gap-closing containment is genuinely compelling. TechBag helps organisations close the detection gap with Xcitium.
Xcitium's boldest and most memorable claim — 'no ransomware' — comes directly from ZeroDwell Containment, and it's grounded in how ransomware actually works versus how containment stops it. How ransomware works: ransomware is a program that, once running on a machine, encrypts the real files (documents, databases, backups) and demands payment for the decryption key. Its entire attack depends on running with real access to your actual files so it can encrypt them. This is why ransomware is so devastating — once it runs, it rapidly encrypts everything it can reach. Why detection struggles: new ransomware variants appear constantly, designed to evade detection, so detection-based tools may not recognise a novel ransomware sample until it's already started encrypting — by which point damage is done (even fast response may not beat encryption). How containment stops it: with ZeroDwell, an unknown file (which a new ransomware sample is) runs contained — in a virtual container where its 'access' to files is virtualised. So when the contained ransomware tries to encrypt files, it encrypts only the virtual container, not your real data — your actual files are untouched. The ransomware runs, does its thing, and achieves nothing, because it never had real access to encrypt. It's neutralised not by being detected and blocked, but by being contained so it literally can't reach your data. This is why Xcitium can make the 'no ransomware' promise: ransomware fundamentally needs real file access to work, and containment denies it that, regardless of whether the specific ransomware is known or novel. For any organisation for whom ransomware is a top fear (which is essentially all of them — ransomware is among the most damaging and common threats), a technology that neutralises ransomware by containing it — rather than hoping to detect each new variant in time — is a powerful proposition. It's the headline reason organisations consider Xcitium. TechBag helps organisations stop ransomware with containment.
ZeroDwell Containment achieves the security ideal of 'default-deny' (don't trust the unknown) while avoiding its usual, serious downside — blocking legitimate unknown files and disrupting work — which is what makes it practical, not just theoretically sound. The default-deny ideal and its problem: security experts agree that 'default-deny' (only allow known-good, deny everything else) is more secure than 'default-allow' (allow everything except known-bad, the traditional antivirus model) — because default-allow lets unknown threats run until they're identified, while default-deny doesn't trust the unknown. But strict default-deny (like pure application allow-listing) has a big practical problem: it blocks legitimate unknown files too — a new application, an updated tool, a legitimate but unrecognised executable — disrupting users' work, generating helpdesk tickets and requiring constant allow-listing management. This friction is why strict default-deny is hard to run, especially for organisations without dedicated staff to manage it. ZeroDwell's clever resolution: it delivers default-deny's security (unknowns aren't trusted with real access) without blocking, by containing unknowns instead of denying them. An unknown file isn't blocked — it runs, and appears to work normally to the user — but it runs contained, so it can't cause real harm. So a legitimate unknown file works fine (contained, then released once verdicted good), while a malicious unknown is neutralised (contained, can't act) — and the user experience is smooth either way, with no blocking of legitimate work. This is genuinely clever: you get the security of not trusting the unknown, without the friction of blocking it. Compared to pure allow-listing tools (like ThreatLocker) that block unknowns (secure but higher-friction), containment offers default-deny security with far less disruption. For organisations that want strong, default-deny-level security but can't tolerate blocking legitimate work or managing constant allow-lists, this containment approach is a compelling middle path. TechBag helps organisations get default-deny security without the friction.
ZeroDwell Containment isn't just a standalone feature — it's the prevention-first foundation beneath Xcitium's whole platform (EDR, XDR, MDR), which means Xcitium approaches endpoint security in a fundamentally different order than detection-first competitors, and understanding this explains the platform's distinctive value. The detection-first model (competitors): most endpoint security platforms — CrowdStrike, SentinelOne, and others — are detection-first: their core is detecting threats (via AI, behaviour, signatures) and then responding (EDR/XDR/MDR built around detection and response). They're very good at this, but it's still fundamentally detect-then-respond, with the inherent gap. Xcitium's prevention-first model: Xcitium inverts the order — it contains first (ZeroDwell neutralises unknowns preemptively), then adds detection and response (EDR, XDR, MDR) on top for visibility, investigation and handling. So the platform's philosophy is: prevent the breach by containing the unknown (zero dwell time), AND provide the detection, response and management capabilities modern security needs — combining preemptive containment with EDR/XDR/MDR. This means Xcitium's EDR isn't just detecting and responding after threats run (with the gap); it's operating on top of a foundation where unknown threats are already contained, so the platform's prevention is stronger while still providing full detection and response. For organisations, this offers a distinctive proposition: a platform whose foundation prevents breaches (contains unknowns/ransomware) rather than relying solely on detecting them, plus the EDR/XDR/MDR capabilities for the rest. It's a genuine architectural difference from detection-first competitors, and Xcitium's core differentiator. Whether it's right for you depends on valuing this containment-first approach — but it's a real, patented, distinctive alternative. TechBag helps you understand and evaluate Xcitium's prevention-first platform. TechBag scopes the platform for your needs.
ZeroDwell Containment is a patented technology from Xcitium, a company with deep endpoint-security heritage (as Comodo, one of the long-standing names in endpoint protection and certificates before rebranding to Xcitium in 2022) — so it's not an unproven idea but a mature, patented approach with a track record. The heritage: Xcitium is the rebranded Comodo Security Solutions — Comodo was a significant, long-established security company (endpoint protection, and historically a major certificate authority before that business was sold and became Sectigo), founded by Melih Abdulhayoglu, with years of experience and a large user base including through its free products and MSP channel. The containment approach has been developed and refined over years, and is patented — reflecting genuine, defensible innovation rather than a marketing repackaging. The proof: the approach has been validated in independent testing (strong prevention results) and deployed across many organisations, and the 'zero dwell time' concept — threats have zero time to operate because they're contained instantly — is a coherent, tested security model. Founder-led continuity (Melih Abdulhayoglu remains involved) provides consistency of vision around the containment philosophy. This heritage and maturity matter because a novel security approach naturally invites the question 'does it actually work, and is the vendor solid?' — and Xcitium's answer is a patented technology, years of development, independent test validation, a large deployed base (including a strong MSP channel and free OpenEDR community), and roots in a long-standing security company. So organisations considering the containment approach aren't betting on an untested startup idea — they're adopting a mature, patented, proven technology from an experienced security vendor. For the reassurance that the distinctive approach is real and works, this heritage is valuable. TechBag represents Xcitium and helps organisations evaluate the containment approach with confidence.
Xcitium ZeroDwell Containment is a genuinely distinctive, patented, preemptive endpoint-security technology — automatically containing unknown files in a virtual container by default, so they can't cause real harm regardless of whether they're detected as malicious, neutralising ransomware and zero-days without the detection gap, while keeping users unblocked. It's the prevention-first foundation of Xcitium's EDR/XDR/MDR platform. The honest framing: the containment approach is real and compelling, but the endpoint-security market is dominated by strong detection-first leaders — CrowdStrike (Falcon) and SentinelOne (Singularity) are the recognised leaders, with excellent AI-driven detection, response, threat intelligence, brand and analyst standing — and they, plus Microsoft Defender for Endpoint, Sophos and others, are the default choices for many. Xcitium is a smaller, challenger vendor with a differentiated technology rather than a market leader, so it's often chosen specifically for the containment approach and its strong value/affordability (notably attractive for MSPs and cost-sensitive organisations, and strong in the SMB/MSP channel), rather than for market-leading brand or the deepest detection/threat-intelligence ecosystem of the top players. The closest philosophical comparison is ThreatLocker (also default-deny/zero-trust, but via strict allow-listing/blocking rather than containment). The honest positioning: ZeroDwell offers a real, patented, prevention-first alternative that's especially compelling if you value containment-based ransomware/zero-day prevention and strong value — while the detection-first leaders offer the deepest detection ecosystems and market-leading standing. Many use Xcitium's containment as strong prevention alongside or instead of detection-first tools. TechBag scopes Xcitium honestly against CrowdStrike, SentinelOne, ThreatLocker and Microsoft Defender, and licenses it in INR/GST with local support.
Your ransomware/zero-day concerns, your current endpoint tool and its gaps, your environment (MSP/SMB/mid), and value drivers. TechBag scopes it free.
Deploy Xcitium with ZeroDwell Containment — unknown files begin running contained by default, so ransomware and novel malware are neutralised from day one.
Tune containment and verdicting for your environment, and layer Xcitium's EDR/XDR (detection, visibility, response) on top of the containment foundation.
Operate the prevention-first platform, or add Xcitium MDR (24x7 managed) if you lack a SOC. TechBag models it in INR/GST and supports locally.
Trusted across regulated industries in 100+ countries
Modelled on Gartner Peer Insights structure. *Counts and breakdowns are illustrative pending verified review collection.
“The containment approach genuinely stopped a ransomware sample that our previous AV missed — it ran contained and encrypted nothing real. 'No ransomware' isn't just marketing.”
“As an MSP, ZeroDwell's prevent-first model plus the value made it ideal for our clients — strong ransomware protection without a premium price.”
“What sold us was closing the detection gap — unknowns are contained from the first moment, not detected after they've started acting. That's a real architectural difference.”
“We wanted default-deny security but couldn't run strict allow-listing — too much blocking. Containment gave us default-deny protection without blocking legitimate work.”
“It's a challenger, not CrowdStrike — the brand and threat-intel ecosystem aren't as deep. But for containment-based prevention and value, it delivered. TechBag was honest about the trade-off.”
“The Comodo heritage reassured us the approach is proven, not a startup gamble — patented, tested, deployed widely. That mattered for a novel approach.”
“Users aren't interrupted — unknown files just run (contained). No blocking, no false-positive floods. That low friction was a pleasant surprise vs our old tool.”
“We use it as strong prevention on top of our detection stack — contain the unknowns, detect and respond to the rest. Layered. TechBag helped position it.”
Analyst firms bury this view behind paywalls, and G2 retired its Grid. So here’s TechBag’s synthesis of the endpoint-security market — tap any vendor to see why it sits where it does.
Execution strength vs product vision — the classic market map, minus the paywall.
Preemptive containment, prevention-first, value. This page's product.
The grid nobody publishes — how strong the email detection is vs how integrated with the wider security portfolio.
Deep on containment/prevention.
Positions are TechBag’s illustrative synthesis of public review-platform data and vendor documentation — not a reproduction of any analyst graphic. Verify before relying on it.
CrowdStrike, SentinelOne, ThreatLocker and Microsoft Defender — honest lanes; the edge is preemptive containment that closes the detection gap, at strong value.
| Dimension | Xcitium ZeroDwell | CrowdStrike Falcon | SentinelOne | ThreatLocker | Microsoft Defender | Traditional AV |
|---|---|---|---|---|---|---|
| Position | Preemptive containment (zero-trust) | EDR/XDR leader (detection) | EDR/XDR leader (AI detection) | Allow-listing / default-deny | MS-native EPP/EDR | Signature-based (default-allow) |
| Core approach | Contain unknowns preemptively | Detect & respond (AI) | Detect & respond (AI) | Block unknowns (allow-list) | Detect & respond | Detect known-bad |
| Detection gap / dwell time | None — contained instantly | Small (fast detection) | Small (fast) | None (blocked) | Present | Large |
| Ransomware prevention | 'No ransomware' — contained | Strong (detect + rollback) | Strong (rollback) | Strong (blocked) | Good | Weak vs novel |
| Zero-day / unknown | Contained regardless | AI catches much | AI catches much | Blocked | Good | Misses novel |
| User friction | None — unknowns run (contained) | Low | Low | Blocks unknowns | Low | Some |
| Detection ecosystem / threat intel | Good; challenger | The deepest | Very deep | Not the focus | Huge (MS signals) | Basic |
| Value / affordability | Strong — MSP/SMB-friendly | Premium | Premium-ish | Competitive | Bundled with MS | Cheap |
| Best fit | Containment-based ransomware/zero-day prevention & value (MSP/SMB/mid) | Enterprises wanting the deepest detection & threat intel | AI-detection-first enterprises | Strict allow-listing / default-deny buyers | All-Microsoft estates | Nobody serious — too weak |
Honest fit signals — because the fastest way to lose your trust is to pretend one product wins every scenario.
Drag the sliders (count endpoints; IT-hour cost as loaded rate). Estimates assume reduced incident handling and no ransomware cleanup once unknowns are contained — but the far larger, unpriced win is the avoided ransomware breach (which containment neutralises before it can encrypt). Illustrative.
Loaded cost = salary + overheads per productive hour. Illustrative only — your TechBag quote models actual device counts and modules.
Xcitium is quote-priced (per endpoint) and known for strong value/affordability — attractive for MSPs, SMB and mid-market. ZeroDwell is the core, delivered with the platform (EDR/XDR/MDR); OpenEDR is free. Generally more affordable than CrowdStrike/SentinelOne. TechBag right-sizes it and quotes in INR/GST with local support.
Best for prevention-first value
Best for a broader rollout
Best complete
Whatever the list prices above, TechBag negotiates a significantly better deal — with GST-compliant INR invoicing and local support. Ask us for your discounted quote.
Tell us your device counts and current tools — we’ll model it against what you spend today.
Take this into your next vendor call — including ours.
Assess your exposure to ransomware and novel malware that detection-based tools might miss — what containment addresses.
Consider whether the detect-then-respond gap worries you — containment eliminates it.
Decide if you want default-deny security — and note containment gives it without blocking legitimate work (unlike allow-listing).
Confirm your fit — Xcitium is strong for MSP, SMB and mid-market, and value-focused organisations.
Weigh the containment approach and value against the deeper detection ecosystems of CrowdStrike/SentinelOne.
Consider the full platform — EDR, XDR, MDR built on containment — for detection and response alongside prevention.
Map strong prevention to compliance and cyber-insurance requirements (ransomware protection).
Size by endpoints and quote in INR/GST — TechBag scopes it (Xcitium is value-friendly).
Scope prevention-first endpoint security (contain unknowns and ransomware before they can act, no detection gap), weigh it against CrowdStrike/SentinelOne/ThreatLocker, or let a TechBag advisor plan your endpoint defence.
Stats, ratings, review counts and pricing are illustrative and sourced from public materials; verify before purchase.