How we ranked these tools (and why runtime leaders rank above us)
Criteria, weighted equally: API discovery completeness (especially undocumented endpoints), testing depth and validation, runtime protection capability, CI/CD and developer fit, time-to-value, and pricing transparency. Salt and Traceable lead because runtime protection at production scale is the hardest problem in the category and they solve it best. NightVision ranks #3 as the strongest pre-production option: we're the only tool here that discovers APIs from source code before they ship — but we don't do runtime protection, and we've said so. A vendor list that hides its own category gaps isn't a buyer's guide; it's an ad.
The category leader in API runtime protection. Salt analyzes production API traffic with behavioral AI to detect attacks, business-logic abuse, and data exposure in real time. It's a defense tool, not a testing tool — it protects APIs in production rather than finding flaws before release.
Strengths
Deep behavioral analytics; strong enterprise adoption; mature attacker-detection models.
Limitations
Runtime-only — doesn't test pre-production or run in CI/CD; requires traffic mirroring; enterprise pricing.
Best fit: Large enterprises protecting high-value production APIs.
API security built on distributed-tracing roots. Traceable maps API behavior end to end, detects threats in production, and adds API testing capabilities on top of its observability core.
Strengths
Excellent API inventory from live traffic; strong data-flow visibility.
Limitations
Traffic-based discovery only finds APIs that receive traffic; testing is secondary to runtime protection.
Best fit: Organizations that want observability-grade API visibility with protection.
NightVision approaches API security from the code side: API eNVy™ generates a complete OpenAPI spec from your source code in under 20 seconds — including shadow and undocumented endpoints that traffic-based tools can't see until they're attacked — then dynamically tests every endpoint with validated, evidence-based DAST in 3–10 minutes, inside CI/CD. Disclosure: this is our product — judge the claims by the free trial.
Strengths
Only tool in this list that discovers APIs from source code before they ship; validated findings pinpointed to file and line; CI/CD-native; from $100/month.
Limitations
Testing-focused — no runtime protection layer; younger brand than the runtime incumbents.
Best fit: Teams that want to find and fix API vulnerabilities before production, on every pull request.
Following Akamai's acquisition of Noname Security, this combines API discovery and posture management with Akamai's edge network for detection and blocking at scale.
Strengths
Massive edge visibility; posture management plus runtime defense in one.
Limitations
Platform-scale procurement; discovery is traffic-based; testing capabilities are not the core.
Best fit: Akamai customers and enterprises wanting edge-enforced API defense.
An API-first DAST with particular strength in business-logic flaws and GraphQL. Agentless, developer-oriented, and focused on the vulnerability classes traditional scanners miss.
Strengths
Deep GraphQL support; business-logic focus; modern developer experience.
Limitations
More black-box than code-connected; findings aren't tied to source lines.
Best fit: API-heavy organizations, especially GraphQL shops.
Developer-first DAST with configuration-as-code and a clean CI/CD workflow. Scanning is driven by the OpenAPI spec you provide.
Strengths
Excellent CI/CD ergonomics; config-as-code; strong documentation.
Limitations
Requires an OpenAPI spec — undocumented and shadow APIs aren't tested.
Best fit: Teams with complete, current OpenAPI specs.
API security centered on the OpenAPI contract itself: static analysis of spec files, conformance scanning, and runtime protection driven by the spec.
Strengths
Rigorous spec auditing; shifts API security into design phase.
Limitations
Entirely spec-dependent — APIs without specs are invisible; narrower scope than full DAST.
Best fit: Design-first API teams with strong OpenAPI governance.
Combines API protection with web application and API protection (WAAP), covering REST, GraphQL, gRPC, and WebSocket traffic with inline blocking.
Strengths
Broad protocol support; inline protection; flexible deployment.
Limitations
Protection-oriented; testing and pre-production discovery are not the strength.
Best fit: Teams consolidating WAF/WAAP and API protection.
Modern DAST covering web apps and APIs with a validation-first approach to minimize false positives.
Strengths
Strong validation story; developer-friendly.
Limitations
API testing requires spec uploads; limited undocumented endpoint discovery.
Best fit: Dev teams wanting validated findings with spec-based scanning.
The leading open-source DAST, scriptable for API scanning via OpenAPI/GraphQL add-ons. Free and community-backed.
Strengths
Free; open source; highly customizable.
Limitations
Significant setup and tuning; no API discovery; no support.
Best fit: Budget-constrained teams willing to invest engineering time.
How to choose
Decide which job you're hiring for first. If attackers probing production APIs is the immediate risk, start with runtime protection (Salt, Traceable, Akamai). If vulnerable APIs reaching production is the root cause, start with pre-production testing and discovery (NightVision, Escape, StackHawk). Mature programs run both — and the discovery question is the connective tissue: a tool that only inventories APIs from production traffic finds them after they're exposed, while source-code discovery finds them before. Whatever you evaluate, ask every vendor the same question: "How do you handle the APIs we never documented?"