AI Coding Agent Security Tools Comparison
Fact review observed 2026-08-09 · source review expires 2026-09-08 · content version 1.0.0
AI coding-agent security spans several tool categories rather than one winner. Snyk Code documents SAST for source-code vulnerabilities; GitHub Code Security includes code scanning and dependency-review capabilities; Socket analyzes dependency changes and also offers a package-manager firewall; native harness controls provide per-harness permissions; HOL Guard applies pre-action policy on the harness and event surfaces in its current support contract. These approaches can be complementary, and each should be evaluated on the same criteria and current primary documentation.
Comparison facts are reviewed by HOL Guard Research. Named vendor facts expire after the current review window rather than being assumed unchanged.
Corrections are triaged within 7 calendar days. Report a correction.
Use identical criteria: protected object, decision point, supported surfaces, failure behavior, deployment boundary, evidence source, and explicit non-coverage. Do not infer that a code scanner, dependency control, package firewall, native permission system, or runtime guardrail replaces the others unless its current primary documentation supports that claim.
| Criterion | Runtime policy | SAST / code security | Dependency / supply-chain controls | Native agent controls |
|---|---|---|---|---|
| Primary protected object | Agent actions on supported event surfaces | Source code | Dependencies/package metadata and supply-chain signals | Actions exposed by a specific harness |
| Decision point | Before or around a Guard-visible consequential action | During static source analysis | Repository/PR, dependency analysis, or package-manager boundary depending on product | At a harness-defined permission boundary |
| Representative current products | HOL Guard | Snyk Code; GitHub code scanning | GitHub dependency review; Socket for GitHub; Socket Firewall | Built-in controls in the chosen coding-agent harness |
| Coverage evidence | Commit-pinned Guard support contract and evidence records | Current vendor primary documentation and scan output | Current vendor primary documentation and dependency/package findings | Current harness primary documentation and observed behavior |
| Cross-harness claim | Policy model spans multiple harnesses; event coverage still varies | Not a harness-interception claim | Not a harness-interception claim | Specific to the harness |
| Runtime action interception | Yes only on supported Guard-visible event surfaces | Not the purpose of SAST | Depends on product; Socket Firewall documents package-manager request interception | Depends on harness event/permission support |
| Code vulnerability analysis | Not a replacement for SAST | Core purpose | Not equivalent to SAST | Not assumed |
| Explicit limitation | Unsupported/uninstrumented actions remain outside the contract | Static findings do not by themselves mediate later agent actions | Dependency controls do not by themselves mediate every later agent action | Coverage and failure behavior vary by harness/version |
Best fit
- Teams evaluating which security tool category to adopt
- Security architects comparing approaches on identical criteria
- Developers wanting a neutral overview of the tool landscape
Not a fit
- Teams looking for a single tool recommendation
- Teams with no AI coding agents
Current named-product sources
These primary sources were observed 2026-08-09 and must be re-reviewed by 2026-09-08.
- Snyk: Snyk Code documentation
- Snyk Code is documented as static application security testing (SAST).
- Snyk: Snyk scanning overview
- Snyk documents SAST, software composition analysis, and infrastructure-as-code scanning as separate capabilities.
- GitHub: GitHub Code Security documentation
- GitHub documents code scanning, dependency review, Dependabot-related capabilities, and secret protection as distinct code-security features.
- Socket: Socket for GitHub documentation
- Socket for GitHub analyzes dependency changes in pull requests for software supply-chain risk.
- Socket: Socket Firewall overview
- Socket Firewall intercepts package-manager requests and can enforce policy before packages reach a system.
Primary sources
Limitations
- This comparison uses identical criteria for every tool, not vendor-supplied feature lists.
- Tool capabilities change frequently; verify current coverage with each vendor.
Related
Gap decision: GAP-DEC-005 · Neutrality review: NEUTRALITY-005
Fact-audit changelog: 2026-08-09 reviewed named-product and product-coverage wording against current primary sources and the Guard support contract.
Gap prioritization may originate from fixture-derived analysis; it is not represented as a live search-engine observation.
- Author
- HOL Guard Team
- Technical reviewer
- HOL Guard Team
- Reviewed
- Content version
- 1.0.0
- Buyer prompt
- GAE-013: best MCP security tools
- Next rescan
Changelog
- v1.0.0 — Initial publication.