Static application security testing in an air-gapped environment is a different problem from SAST in general. Most of the market has spent a decade moving to SaaS, and the assumptions baked into that move — cloud analysis backends, license servers, telemetry, rule feeds pulled over the internet — are exactly the things a classified or disconnected network cannot allow.
If you run development inside a defense enclave, an intelligence network, a critical-infrastructure OT environment, or simply a security program whose policy says source code never crosses the perimeter, your shortlist of viable SAST tools is short. This guide covers the five options most teams end up evaluating, what “offline” actually means for each, and how to compare them on the criteria that matter in a disconnected deployment.
What “air-gapped ready” actually means
Vendors use “on-premise” loosely. Before evaluating specific tools, it helps to separate four levels of independence, because a tool can pass the first and fail the rest:
- Offline scanning. The analysis engine runs entirely on hardware you control, with no code, ASTs, or scan artifacts leaving the network. This is the minimum bar, and several “on-prem” products still ship partial results or metadata to a vendor cloud.
- Offline licensing and activation. No license-server callbacks, no periodic phone-home to stay activated. Some self-hosted products are functionally offline but quietly require an activation check that fails inside an enclave.
- Offline updates. Rules, engines, and vulnerability content must be updatable through your controlled-media or cross-domain transfer process — not only via a live internet connection. A SAST tool with stale rules degrades quickly.
- No telemetry by default. Usage analytics, crash reporting, and rule-fetch metrics either don’t exist or can be verifiably disabled. In accredited environments, “can be disabled” needs to be provable to your assessor, not just asserted.
A practical test during procurement: ask the vendor to demonstrate a full install, activation, scan, and update cycle on a machine with no default route. If the demo requires a hotspot, you have your answer.
The five tools worth evaluating
Offensive360 (OVA appliance, fully offline)
Offensive360 ships as a virtual machine appliance (OVA) that you import into your own hypervisor — vSphere, VirtualBox, or a private cloud — and it is designed to run with zero internet dependency. All analysis engines are built in-house rather than wrapping third-party analyzers, which matters in a disconnected deployment: there is no constellation of upstream components that each need their own update path or license check.
Coverage is broad for an air-gapped product: 60+ languages including Java, C#, C/C++, Python, Go, JavaScript/TypeScript, Kotlin, Swift, plus legacy and niche stacks such as COBOL, Oracle Forms (PL/SQL), Apex, and ColdFusion — relevant if your enclave contains twenty years of accumulated systems, as most do. The engine performs interprocedural taint and data-flow analysis, and every finding includes the full source-to-sink trace with a secure code example in the language being scanned, which reduces the back-and-forth between security and development teams that is especially costly when those teams sit in different classification zones.
The same appliance includes DAST, SCA, mobile (MAST), malware and binary analysis, and license compliance at one flat price — per project or per instance, not per user or per line of code. For enclaves where adding seats is an administrative event, unlimited users is a practical advantage rather than a pricing footnote.
Updates for disconnected deployments are delivered as versioned offline packages that can be brought in through your controlled-media process; our engineers walk through the exact transfer workflow during evaluation to match your accreditation requirements.
Fortify (OpenText) on-premise
Fortify Static Code Analyzer with Software Security Center is the longest-established fully on-premise SAST deployment, and it remains a credible choice for classified programs — many defense integrators have run it inside enclaves for years. Rule content (Rulepacks) is published on a regular cycle and can be downloaded outside the enclave and transferred in manually, which fits standard controlled-media processes.
The trade-offs are operational weight and cost. Fortify’s server components, database, and scan infrastructure require meaningful care and feeding, and tuning the analyzer to an acceptable noise level is typically a project in itself. Language coverage is solid (30+ languages per vendor documentation). Pricing is quote-based and, in our experience of competitive evaluations, generally at the high end of the market; verify current licensing models directly with OpenText, as they have changed over the product’s ownership transitions.
Checkmarx self-hosted
Checkmarx built its reputation on self-hosted CxSAST, and self-managed deployments still exist across government and finance. However, the company’s flagship is now Checkmarx One, a cloud-native platform, and its public positioning has followed the market to SaaS. If you are evaluating Checkmarx for an air-gapped program in 2026, the essential due-diligence questions are about the future, not the present: which product line will you be sold, what is the support horizon for self-hosted versions, and how are engine and content updates delivered without connectivity. Prospective buyers should get roadmap commitments in writing.
Language coverage is around 30+ per vendor documentation, with strong query customization (CxQL) for teams that invest in it. Pricing is quote-based; historically it has been oriented around developer counts and projects.
SonarQube self-managed
SonarQube Server is genuinely self-managed and can run disconnected; it is also the most commonly encountered tool on this list because so many teams already use it for code quality. Two caveats matter for security-focused, air-gapped use. First, the deeper security analysis — taint analysis for injection-class vulnerabilities — is a commercial-edition feature, not part of the free Community Build. Second, SonarQube’s heritage is code quality; its security coverage is real but narrower than dedicated SAST engines, and most security teams treat it as a complement rather than the system of record for vulnerabilities.
Commercial pricing is based on lines of code analyzed, which is predictable but grows with your codebase. Upgrades and plugins can be transferred manually. If SonarQube is already deployed in your enclave for quality gates, the pragmatic question is whether its commercial security features are sufficient for your threat model — for some internal codebases they are.
Semgrep
Semgrep’s open-source engine runs locally and can be fully offline if you vendor your rule files into the enclave — the engine itself makes no calls if you point it at local rules. That makes it a useful, lightweight layer for custom organizational rules, and its rule syntax is the most approachable on this list.
The caveats: Semgrep’s commercial offering (the AppSec Platform, Pro rules, and cross-file analysis) is cloud-connected by design, and the CLI’s registry-based workflows involve network access and metrics per Semgrep’s own documentation. In an air-gapped deployment you are effectively committing to the open-source engine with locally curated rules — powerful in skilled hands, but without the interprocedural depth or managed rule coverage of the commercial engines above. Note also that the open-source licensing of the ecosystem shifted in recent years (prompting the Opengrep fork), so review the license terms of the specific version you intend to freeze inside your enclave.
Comparison: air-gapped criteria
| Criterion | Offensive360 | Fortify (OpenText) | Checkmarx self-hosted | SonarQube self-managed | Semgrep (OSS engine) |
|---|---|---|---|---|---|
| Offline operation | Full — OVA appliance, zero internet dependency | Full on-premise deployment | Legacy self-hosted yes; flagship is cloud-native — confirm roadmap | Yes, self-managed server | Engine yes, with local rules; platform/Pro rules are cloud-connected |
| Language coverage | 60+, in-house engines, incl. COBOL, Oracle Forms, Apex | 30+ per vendor docs | ~30+ per vendor docs | ~30 per vendor docs; taint analysis commercial-only | 30+ community rule coverage varies by language |
| Updates without internet | Versioned offline packages via controlled media | Rulepacks downloadable and manually transferable | Historically manual content updates; verify for current versions | Manual server/plugin upgrades | Vendor rule registry needs connectivity; local rule bundles possible |
| Telemetry | None required for operation | Configurable; verify per deployment | Verify per product line | Telemetry can be disabled | CLI metrics on by default in registry workflows; off with local rules |
| Pricing model | Flat per-project/per-instance; unlimited users and scans; DAST/SCA/MAST/malware analysis included | Quote-based; typically premium enterprise pricing | Quote-based; historically developer/project oriented | Per lines of code (commercial editions) | OSS free; commercial per-contributor |
Competitor details reflect public vendor documentation and market experience as of early 2026 and can change; validate current terms during procurement.
When Offensive360 is not the right choice
An honest assessment, because a wrong-fit deployment helps nobody:
- You need a mature ecosystem of third-party integrations and consultancies. Fortify and Checkmarx have decades of accumulated integrations, certified partners, and staff on the market who already know the tooling. If your program mandates a specific integrator’s accredited stack, that constraint may decide the tool.
- Your primary need is code quality, not security. If the goal is maintainability metrics, duplication, and style gates with some security lint on top, SonarQube is the pragmatic choice and we would tell you so.
- You want a free, minimal footprint for custom rules only. If a small security team wants to codify a handful of organization-specific patterns and nothing more, Semgrep’s open-source engine with local rules is hard to argue against on cost.
- Procurement requires a vendor with specific national accreditations you must inherit. Check accreditation requirements early; if a framework agreement names specific approved products, start there.
Where Offensive360 fits best: programs that need broad language coverage (especially legacy stacks), true zero-connectivity operation without licensing gymnastics, and consolidated SAST/DAST/SCA/mobile coverage inside one appliance instead of three separately accredited products.
Frequently asked questions
Can a SAST tool stay effective without internet access to vulnerability feeds? Yes, if the vendor designed for it. SAST rules describe code patterns (CWE classes, taint sources and sinks), which change far more slowly than CVE feeds. What matters is a workable offline update path — versioned rule and engine packages you can transfer on your own schedule — and an engine that doesn’t silently depend on cloud components for parts of the analysis.
How is an OVA appliance deployment accredited in a classified environment? The appliance is imported into your existing accredited virtualization infrastructure and inherits your enclave’s controls; there is no external connectivity to assess. You will still evaluate the appliance itself (hardening, update integrity, administrative access) under your framework — ask the vendor for documentation supporting your specific accreditation process.
Does “self-hosted” mean my code never leaves the network? Not automatically. Some self-hosted products upload metadata, partial results, or telemetry to vendor clouds, and some require online license activation. Verify with a network capture during your proof of concept — on an air-gapped segment, anything the tool tries to send is immediately visible as a failure.
What about scanning AI-generated code in disconnected environments? Teams inside enclaves increasingly use locally hosted coding models, and independent 2025 research found roughly 45% of AI-generated code contains known security flaws. The scanning approach is the same — interprocedural taint analysis catches the injection flaws and missing validation that generated code introduces — but it makes a rigorous SAST gate more important, not less, in networks where code review capacity is limited.
How long does deployment take? For an appliance model, import and first scan are typically measured in hours (Offensive360’s OVA is designed to be operational in under one hour). Server-based suites like Fortify or self-hosted Checkmarx are typically multi-week infrastructure projects; plan accreditation and tuning time accordingly.
Next steps
If you are shortlisting SAST for a disconnected or classified environment, the fastest way to evaluate Offensive360 is to see it run against your own criteria.
- Book a demo — walk through an air-gapped deployment scenario with our engineers, including the offline update workflow.
- Run a free scan — test detection quality on a non-sensitive codebase before you ever bring anything inside the perimeter.