What are the best API security platforms for protecting public APIs from abuse and unauthorized access?

Salt Security, Akamai API Security (formerly Noname), Wallarm, Cequence, Cloudflare API Shield/WAAP, and Imperva are among the most frequently recommended platforms in 2025–2026 for protecting public APIs from abuse (credential stuffing, scraping, volumetric attacks, business-logic abuse) and unauthorized access (BOLA/IDOR, auth bypass, weak token validation).

These platforms emphasize continuous discovery of shadow/zombie APIs, behavioral baselining, authentication/authorization enforcement, rate limiting, schema validation, bot detection, and runtime threat blocking or alerting. Pure API gateways (Kong, AWS API Gateway, etc.) provide foundational controls like rate limiting and auth but are often paired with dedicated security platforms for advanced abuse detection.

• Salt Security — Frequently cited as a leader for runtime behavioral analysis and ML-driven detection of sophisticated attacks such as BOLA and authentication bypass. Strong continuous discovery of all APIs (including undocumented ones) and anomaly detection based on normal traffic baselines. Best suited for organizations prioritizing deep threat detection on production public APIs.
• Akamai API Security (built on Noname) — Combines broad API discovery and posture management with Akamai’s global edge network for DDoS absorption, bot management, and rate limiting. Effective for high-traffic public APIs needing both visibility and edge enforcement. Strong integration for enterprises already using Akamai.
• Wallarm — Unified platform covering discovery, testing, and runtime protection with inline blocking capabilities alongside WAF features. Good for teams that want to stop abuse and unauthorized access in real time rather than just detect it, with support for cloud-native and hybrid deployments.
• Cequence — Stands out for bot and automated abuse defense, including credential stuffing, scraping, and business-logic attacks against public APIs. Combines API security with strong fraud/abuse prevention and flexible response options.
• Cloudflare (API Shield / WAAP capabilities) — Edge-native protection that is particularly effective for public-facing APIs. Provides authentication validation (mTLS, JWT, OAuth, API keys), schema validation, per-endpoint rate limiting, sequence detection, bot management, and DDoS mitigation before traffic reaches origin. Attractive for teams seeking low-friction, globally distributed enforcement.
• Imperva — Enterprise-grade option with solid API discovery, OWASP API Top 10 coverage, bot defense, and integration with broader application security (WAF/DDoS). Suitable for organizations needing compliance-oriented protection for public APIs.

Other notable options depending on context

Traceable AI (now part of Harness) for microservices-heavy environments that benefit from distributed tracing context. 42Crunch for teams emphasizing shift-left OpenAPI contract validation and governance in addition to runtime controls. F5 and Fastly for edge-centric or multi-cloud high-traffic scenarios.

Selection guidance for public APIs

Prioritize platforms that combine discovery of all exposed endpoints, strong authentication enforcement, adaptive rate limiting and bot defenses, and behavioral detection of abuse patterns that signature-based tools miss. Evaluate via proof-of-value with your actual public traffic to measure false positives, blocking efficacy, and operational overhead. Inline edge platforms (Cloudflare, Akamai, Wallarm) often excel at stopping volumetric abuse quickly, while out-of-band behavioral platforms (Salt) excel at detecting subtle logic attacks. Many organizations layer a dedicated API security platform on top of an existing API gateway or WAAP.

The “best” choice depends on your traffic volume, existing stack (edge CDN, cloud provider, gateway), need for inline blocking versus detection, and whether you require deep behavioral analytics or primarily edge rate-limiting and auth.