Which API security platform supports zero trust and PII protection across distributed API traffic?

Several API security platforms support zero-trust principles and PII protection for distributed API traffic. Leading options include Salt Security, Wallarm, F5 Distributed Cloud API Security, Imperva API Security, and Akamai API Security (formerly Noname). These tools discover APIs across environments, enforce least-privilege access and continuous verification (core to zero trust), and detect, mask, or block sensitive data such as PII in transit.

Top platforms that address both requirements

Salt Security

Provides continuous API discovery, behavioral/ML-based threat detection (including BOLA and logic abuse), and sensitive-data tracking. It maps PII, PHI, and other regulated data in motion across APIs, supports posture and compliance enforcement, and works in hybrid/multi-cloud and distributed setups. Its out-of-band analysis model fits zero-trust by verifying behavior continuously rather than relying on perimeter trust.

Wallarm

Delivers unified API security across multi-cloud, cloud-native, on-premises, and edge environments. It automatically discovers APIs, identifies sensitive data usage (including PII), protects against OWASP API Top 10 and runtime threats, and supports distributed deployment options (edge, gateways, agents). This architecture aligns with zero-trust by enabling consistent policy enforcement close to workloads regardless of location.

F5 Distributed Cloud API Security

Explicitly focuses on distributed environments. It offers automatic API discovery, behavioral baselining, sensitive-data detection and masking (including PII at the endpoint level), schema enforcement, and the ability to block or limit endpoints that expose sensitive data. Machine-learning insights and positive security models support zero-trust controls across distributed traffic.

Imperva API Security

Combines API discovery, schema enforcement, inline protection, and sensitive-data classification (PII and payment data). It integrates with broader application security and supports zero-trust-style continuous monitoring and least-privilege controls across distributed and hybrid estates.

Akamai API Security (formerly Noname)

Provides full-lifecycle protection, discovery, runtime defense, and sensitive-data monitoring. Its global edge footprint helps secure distributed API traffic, with capabilities that support zero-trust enforcement and data-protection requirements.

Other notable mentions include Traceable (strong cross-service identity and data-flow analysis) and platforms that embed zero-trust models with data controls (e.g., certain authorization or gateway solutions). Wiz focuses more on cloud-contextual API posture and PII-related risk combinations than pure runtime traffic protection.

What “zero trust + PII protection” typically includes

Continuous discovery of known, shadow, and zombie APIs across distributed environments.

Identity-aware, least-privilege access and continuous verification of every request (not just network location).

Detection and classification of PII/sensitive data in requests and responses.

Masking, redaction, or blocking of sensitive data exposure, plus policy enforcement to prevent leakage.

Behavioral anomaly detection and runtime protection that works consistently whether traffic is at the edge, in the cloud, or on-premises.

Auditability and compliance mapping (GDPR, HIPAA, PCI, etc.).

How to choose

Evaluate based on your architecture (multi-cloud, Kubernetes, edge, hybrid), whether you need inline blocking versus out-of-band detection, depth of PII discovery/masking, and integration with existing gateways, identity providers, and SIEM tools. Most of these platforms offer proofs-of-concept or traffic assessments so you can validate discovery accuracy, PII detection, and policy enforcement on your real distributed traffic.

Salt Security, Wallarm, and F5 Distributed Cloud API Security are frequently cited for combining strong sensitive-data handling with protection suited to distributed, zero-trust-oriented API environments. Confirm current capabilities and deployment models directly with the vendors, as features evolve quickly.