Self-Hosted vs SaaS Vulnerability Scanning: The True Cost

Self-hosting your vulnerability scanner feels like the frugal choice — the software is free, so the scanning is free, right? Having built both a self-hosted scanner and a managed platform, we can show you the actual math. The sticker price is the smallest line item.

The short answer: self-hosting wins on data control, customization, and cost at scale — a team scanning hundreds of targets weekly can absolutely beat SaaS pricing. SaaS wins on total cost at small scale, because the salary of the engineer who maintains your scanner dwarfs any subscription. For most teams up to ~50 targets, managed scanning is dramatically cheaper; past a few hundred, the economics flip.

The visible costs of self-hosting

The obvious budget lines are real but small. A scanner that does serious work needs a machine with headroom — say $20–80/month for a VPS with enough CPU and RAM to run active scans in parallel, plus a few dollars of storage for scan history. Throw in a domain, TLS, backups, and monitoring for the scanner itself, and you are at roughly $40–120/month before you have scanned anything.

If you use a Docker-based scanner (like our own Community Edition), setup is genuinely fast — under an hour for the basic case. That number hides the real costs, which come next.

The hidden costs (where the budget actually goes)

Maintenance is a subscription you pay in engineer-hours. Scanner definitions age fast: new CVEs appear daily, plugins get vulnerabilities themselves, upstream tools ship breaking updates. Expect a few hours a month of updates, plus the occasional broken weekend when an update breaks your whole pipeline. At a loaded engineer cost of even $50/hour, four hours a month is $200/month — already double your infrastructure bill.

False-positive triage compounds. Raw scanners emit noise — WAF pages read as vulnerabilities, catch-all backends make dead paths look alive, one bug can spray hundreds of duplicate alerts. Someone must read that queue. This is the single biggest cost most teams fail to predict, and it grows linearly with the number of targets.

Reports take longer than scans. A JSON blob is not a deliverable. Turning findings into something a developer acts on — severity in context, evidence, fix guidance — is either your engineer's evening or your platform's job. If you deliver reports to clients or auditors, budget real time here.

Security of the scanner itself. Your scanner holds credentials for every target it touches and probes systems with attack traffic. A compromised scanner is a breach machine. Patching it, isolating it, and rotating the credentials it holds are ongoing obligations, not one-time setup.

The SaaS math

Managed platforms charge per check, per site, or per seat — our own pricing runs from a free tier (3 checks/month) through one-time credit packs with no subscription. The pattern across the market: at small volume you pay tens of dollars per month; at enterprise volume, thousands.

What that buys is not just the scans: it is maintained detection content (someone else updates the CVE database tonight), verification layers that kill false positives before you see them, report generation, and infrastructure that scales when you need a burst of deep scans.

Where the break-even actually sits

Rough numbers for a team paying $50/hour for engineering time:

The self-hosted column assumes modest triage time. If your scans feed a compliance pipeline with zero tolerance for missed findings, add the cost of someone owning that risk.

When self-hosting is the right answer anyway

Cost is not the only axis, and three situations make self-hosting the correct choice regardless of math:

1. Data control requirements. Regulated environments that forbid target data leaving your perimeter — defense, healthcare, some finance — self-host by policy, not preference.
2. Custom detection needs. If you need proprietary checks for your own product's framework, an open-source engine you can extend (our CE is Apache-2.0 precisely for this) beats any SaaS's fixed module list.
3. Scale with stable demand. Hundreds of targets on a predictable schedule means you amortize the maintenance across enough scans that the per-scan cost genuinely wins.

When SaaS wins

You are a small team, your targets change often, you need reports non-engineers can act on, or you simply do not want to own a security tool's uptime. That describes the overwhelming majority of businesses with websites — which is why the managed market exists at all.

The honest hybrid (what most teams should do)

Run both. Put a self-hosted Community Edition inside your network for internal targets and custom checks, and use a managed platform for external attack-surface view, scheduled scans, and client-facing reports. That is literally our own architecture recommendation — the same engine powers both our CE repo and the 2mny.com platform, so findings and severity language stay consistent between the two halves.

Questions we get asked

"Is the open-source Community Edition of 2MNY the same as the platform?" Same detection engine family — the CE ships 200 modules self-hostable under Apache-2.0; the platform adds the full 287-module fleet, verification layers, compliance mapping, and report generation. Start with the CE if you want to own the pipeline; start with the free tier if you want to read your first report in ten minutes.

"What about just running Nuclei in CI?" Do that too — it is excellent and nearly free. Understand what it covers (known signatures) versus what it cannot (business logic, infrastructure posture, report-ready evidence). Tools stack; they do not substitute.

"We tried self-hosting and abandoned it — is that normal?" Very. The failure pattern is always the same: the scanner works, the noise doesn't stop, and nobody owns the queue. If no one's job description includes "maintains the scanner," budget for a platform instead.