Top 10 Best API Security Testing Companies In 2025 

The digital landscape in 2025 is defined by APIs. They are the backbone of modern applications, enabling everything from mobile banking to microservices architectures.

However, this ubiquity has made them a prime target for attackers, with API-related breaches becoming a leading cause of data exfiltration.

The OWASP API Security Top 10 has become a critical benchmark, but the true challenge lies in securing APIs against sophisticated, business logic abuse that traditional tools can’t detect.

The Best API security testing companies in 2025 are those that offer a comprehensive, full-lifecycle approach to securing APIs, from design to runtime.

Why We Choose API Security Testing

Traditional security solutions like Web Application Firewalls (WAFs) and DAST scanners often fail to effectively protect APIs.

They are designed to secure web pages and are easily bypassed by API-specific attacks like Broken Object Level Authorization (BOLA) and business logic abuse.

API security testing is a specialized discipline that focuses on the unique risks of APIs, including:

Undocumented and Shadow APIs: Finding and securing APIs that developers have created without the security team’s knowledge.

Business Logic Flaws: Identifying how an attacker can abuse the intended functionality of an API to gain unauthorized access or exfiltrate data.

Sensitive Data Exposure: Ensuring that APIs do not unintentionally return sensitive data in their responses.

A robust API security testing program is no longer a luxury but a necessity to prevent breaches and maintain a strong security posture.

How We Choose It

To compile this list, we evaluated each provider based on the following criteria:

Full Lifecycle Coverage: The ability to provide security from the development (shift-left) phase to production (runtime).

Behavioral Analytics & AI: The use of advanced AI and machine learning to detect and protect against sophisticated, non-signature-based attacks.

API Discovery: The ability to automatically discover and inventory all APIs, including shadow and zombie APIs.

Integration & Scalability: How well the platform integrates with existing DevSecOps pipelines and scales with business growth.

Comparison Of Key Features (2025)

Company	API Discovery	Runtime Protection	Shift-Left Testing	Behavioral Analytics
Salt Security	✅ Yes	✅ Yes	❌ No	✅ Yes
Traceable AI	✅ Yes	✅ Yes	✅ Yes	✅ Yes
APIsec	✅ Yes	✅ Yes	✅ Yes	✅ Yes
Treblle	✅ Yes	✅ Yes	✅ Yes	❌ No
Imperva	✅ Yes	✅ Yes	❌ No	✅ Yes
StackHawk	✅ Yes	✅ Yes	✅ Yes	❌ No
Akto.io	✅ Yes	✅ Yes	✅ Yes	✅ Yes
Cequence Security	✅ Yes	✅ Yes	✅ Yes	✅ Yes
Prophaze	✅ Yes	✅ Yes	❌ No	✅ Yes
Noname	✅ Yes	✅ Yes	✅ Yes	✅ Yes

1. Salt Security

Salt Security is a market leader, known for its patented API security platform that focuses on behavioral analysis.

It automatically discovers all APIs and uses AI to baseline normal behavior. By analyzing API traffic, it can detect and stop sophisticated attacks, including BOLA and business logic abuse, in real time.

Its strength lies in its ability to detect “low and slow” attacks and provide a full context of the attacker’s activities, from reconnaissance to final data exfiltration.

Why You Want to Buy It:

Salt’s platform provides deep, continuous API discovery and runtime protection.

It excels at finding and stopping attacks that bypass traditional security tools, giving security teams a comprehensive, actionable view of API-related risks.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatically discovers all APIs, including shadow and zombie.
Runtime Protection	✅ Yes	Real-time behavioral threat detection and blocking.
Shift-Left Testing	❌ No	Primarily focused on runtime protection.
Behavioral Analytics	✅ Yes	Uses patented AI to baseline normal API behavior.

✅ Best For: Enterprises that need a powerful, AI-driven solution to protect APIs in production and a complete view of their API attack surface.

Try Salt Security here → Salt Security Official Website

2. Traceable

Traceable AI offers a full lifecycle API security platform that provides observability, testing, and protection.

Its approach is to trace every API call across the entire application stack, from end-user to back-end services.

This provides unparalleled visibility into API behavior, enabling it to detect and prevent a wide range of threats, from OWASP API Top 10 vulnerabilities to business logic flaws and bot attacks.

Its seamless integration into CI/CD pipelines makes it ideal for DevSecOps.

Why You Want to Buy It:

Traceable’s end-to-end tracing and AI-driven insights provide a deep understanding of API interactions.

This comprehensive context allows them to identify and prevent attacks that span multiple API calls and services.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatic discovery of all APIs, including internal and third-party.
Runtime Protection	✅ Yes	Real-time threat detection and blocking based on behavioral analysis.
Shift-Left Testing	✅ Yes	Provides API security testing within the CI/CD pipeline.
Behavioral Analytics	✅ Yes	Uses AI to analyze traffic and detect anomalies.

✅ Best For: Organizations with complex microservices architectures that need full-stack visibility and a solution that supports both “shift-left” and “protect-right” strategies.

Try Traceable AI here → Traceable AI Official Website

3. APIsec

APIsec is a security testing platform designed to help developers and security teams integrate API security into their CI/CD pipelines.

It specializes in automated, dynamic security testing that identifies vulnerabilities before APIs are pushed to production, making it a true “shift-left” solution.

Why You Want to Buy It:

If your primary goal is to find and fix API vulnerabilities early in the development process, APIsec is an excellent choice. Its automated testing engine generates thousands of test cases to identify issues like the OWASP API Top 10.

By integrating directly into your CI/CD pipeline, it ensures that no vulnerable code makes it to production. For more on this approach, see our guide on the benefits of shift-left security.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Finds and inventories APIs to be tested.
Runtime Protection	✅ Yes	Primarily focused on pre-production testing.
Shift-Left Testing	✅ Yes	Integrates into CI/CD for automated testing.
Behavioral Analytics	✅ Yes	Focus is on vulnerability testing, not runtime behavior.

✅ Best For: Development teams and DevSecOps professionals who want to automate security testing and prevent vulnerabilities from ever reaching production.

Try APIsec here → APIsec Official Website

4. Treblle

Treblle is an API observability and monitoring platform that has integrated powerful security features.

While its primary function is to help developers monitor API performance and documentation, it provides real-time security scanning and vulnerability detection.

It automatically checks for common API vulnerabilities, bad requests, and suspicious behavior, making it an excellent tool for developers and small teams looking to add a layer of security to their development process.

Why You Want to Buy It:

Treblle’s seamless integration into the developer workflow and its focus on simplicity make it an ideal choice for teams that want to embed security into their existing tools without adding a complex new solution.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Provides a real-time, comprehensive API inventory.
Runtime Protection	✅ Yes	Real-time monitoring with security and anomaly detection.
Shift-Left Testing	✅ Yes	Provides automated testing and validation during development.
Behavioral Analytics	❌ No	Focuses on real-time monitoring and event-based alerts.

✅ Best For: Development teams and small businesses that need a simple, easy-to-use API monitoring tool with built-in security testing.

Try Treblle here → Treblle Official Website

5. Imperva API Security

Imperva API Security, a part of the larger Imperva application security suite, provides multilayered API protection using its cloud-based infrastructure and a global threat intelligence network.

It focuses on discovering all APIs, enforcing schema validation, and detecting and blocking attacks at the perimeter.

Why You Want to Buy It:

Imperva is a trusted name in web application security, and its API security solution benefits from decades of experience protecting websites.

It’s an excellent choice for organizations that need a proven, comprehensive solution that can handle a massive volume of API traffic and integrate with existing Imperva products like their WAF.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatically discovers and inventories all APIs.
Runtime Protection	✅ Yes	Provides perimeter-based threat detection and blocking.
Shift-Left Testing	❌ No	Offers capabilities for API design and schema validation.
Behavioral Analytics	✅ Yes	Uses AI to analyze API traffic and detect anomalies.

✅ Best For: Large enterprises that need a robust, enterprise-grade, and scalable API security solution that integrates with their existing security stack.

Try Imperva here → Imperva Official Website

6. StackHawk

StackHawk is a modern DAST solution built specifically for APIs.

It enables security teams and developers to find and fix vulnerabilities in web applications and APIs by running automated tests in CI/CD pipelines.

The platform is designed to be developer-friendly, providing detailed, actionable reports and integrating with popular tools like GitHub and Slack, which helps teams resolve issues quickly.

Why You Want to Buy It:

StackHawk’s “Test-as-Code” approach and seamless integration with DevOps tools make it a powerful ally for modern development teams.

It helps to catch vulnerabilities before they are deployed, preventing security issues from making it to production.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Scans API endpoints and auto-generates specifications.
Runtime Protection	✅ Yes	Provides runtime monitoring and threat detection.
Shift-Left Testing	✅ Yes	Automated DAST scanning in CI/CD pipelines.
Behavioral Analytics	❌ No	Focuses on automated DAST scanning and vulnerability testing.

✅ Best For: Development and security teams that need to integrate API security testing directly into their CI/CD pipelines for continuous, automated security.

Try StackHawk here → StackHawk Official Website

7. Akto.io

Akto.io provides a comprehensive, AI-driven API security platform with a strong focus on discovery, testing, and runtime protection.

It boasts the world’s largest API security test library, with over 1,000 tests covering everything from the OWASP Top 10 to business logic flaws.

Akto’s platform is designed to be deployed quickly and offers continuous API monitoring and security testing, making it a powerful solution for modern AppSec teams.

Why You Want to Buy It:

Akto’s extensive test library and AI-powered testing engine allow it to find a wide range of vulnerabilities, including those that are difficult to detect.

Its full-lifecycle approach provides a complete picture of an organization’s API security posture.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatic discovery from traffic, code, and CI/CD.
Runtime Protection	✅ Yes	Provides real-time threat detection and protection.
Shift-Left Testing	✅ Yes	Offers automated security testing in CI/CD pipelines.
Behavioral Analytics	✅ Yes	Uses AI to test for authentication and business logic flaws.

✅ Best For: AppSec teams that need a comprehensive, all-in-one platform for API security, from discovery and testing to runtime protection.

Try Akto.io here → Akto.io Official Website

8. Cequence Security

Cequence Security provides a Unified API Protection platform that addresses the full lifecycle of API security.

Its platform offers continuous discovery of all APIs, a comprehensive assessment of security posture, and runtime protection against a wide range of threats.

Cequence uses machine learning to analyze API traffic and detect sophisticated attacks like BOLA and business logic abuse, making it a strong contender for enterprises.

Why You Want to Buy It:

Cequence offers a powerful, single-platform solution for API and bot management.

Its ability to provide both discovery and protection, without requiring agents, makes it a highly scalable and effective solution for a wide range of environments.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatically discovers all APIs, including shadow and zombie.
Runtime Protection	✅ Yes	Real-time threat detection and protection.
Shift-Left Testing	✅ Yes	Provides testing for APIs in pre-production environments.
Behavioral Analytics	✅ Yes	Uses machine learning to detect attacks and anomalies.

✅ Best For: Large enterprises that require a unified platform for API security and bot management to protect against complex, sophisticated attacks.

Try Cequence Security here → Cequence Security Official Website

9. Prophaze

Prophaze offers a Cloud WAAP (Web Application and API Protection) solution that is particularly well-suited for Kubernetes and cloud-native environments. It provides a lightweight, AI-driven security solution for APIs and web applications.

Prophaze’s platform automates API discovery, provides real-time traffic monitoring, and protects against a wide range of threats, including the OWASP Top 10.

Why You Want to Buy It:

Prophaze’s Kubernetes-native design makes it easy to deploy and manage in modern cloud environments.

Its AI-driven approach provides robust protection without the overhead of a traditional, signature-based WAF.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Automatically discovers APIs in cloud-native environments.
Runtime Protection	✅ Yes	Provides real-time API and WAAP protection.
Shift-Left Testing	❌ No	Focuses on runtime protection.
Behavioral Analytics	✅ Yes	Uses AI to detect threats and anomalies.

✅ Best For: Companies with cloud-native or Kubernetes-based environments that need a lightweight, AI-driven API security solution.

Try Prophaze API Security here → Prophaze API Security Official Website

10. Noname Security

Noname Security provides a comprehensive, agentless API security platform that covers the entire API lifecycle. It offers four key pillars: Discovery, Posture Management, Runtime Security, and Active Testing.

Its platform provides a complete inventory of all APIs, analyzes their posture for misconfigurations, and protects against attacks in real time.

The platform’s active testing component allows for on-demand security testing in CI/CD pipelines.

Why You Want to Buy It:

Noname’s agentless architecture makes it easy to deploy across complex environments without disrupting operations.

Its full-lifecycle approach ensures that organizations have complete visibility and control over their entire API ecosystem.

Feature	Yes/No	Specification
API Discovery	✅ Yes	Provides a comprehensive, agentless API inventory.
Runtime Protection	✅ Yes	Real-time threat detection and protection.
Shift-Left Testing	✅ Yes	Active testing for APIs in CI/CD.
Behavioral Analytics	✅ Yes	Uses AI/ML to detect API anomalies.

✅ Best For: Large enterprises that need a robust, agentless platform for full-lifecycle API security, from discovery to testing and runtime protection.

Try Noname Security here → Noname Security Official Website

Conclusion

In 2025, API security testing is no longer a niche service but a cornerstone of any effective cybersecurity strategy.

The market has matured, with a clear focus on full-lifecycle coverage, AI-driven protection, and seamless integration into DevSecOps workflows.

Salt Security and Traceable AI are leaders in runtime protection, excelling at detecting and blocking the most sophisticated, behavior-based attacks.

For organizations that want to empower their developers and “shift left,” 42Crunch and StackHawk provide excellent tools that embed security directly into the development process.

Meanwhile, platforms like Noname Security and Cequence offer a comprehensive, all-in-one solution for large enterprises.

The best choice for your organization depends on your specific needs, but adopting a solution from this list is a crucial step toward securing your business in the API-driven world.