Best API Security Software

Compare the Top API Security Software as of December 2025

What is API Security Software?

API security software is designed to protect APIs from security threats such as unauthorized access, data breaches, and denial-of-service attacks. These tools monitor, authenticate, and secure the connections between APIs and the systems they interact with, ensuring that only authorized users and systems can access the data or services offered by the API. Features typically include encryption, rate limiting, authentication (such as OAuth, JWT), API traffic monitoring, threat detection, and automated security testing. API security software is crucial for businesses that rely on APIs to connect with third-party services, mobile apps, or microservices, as it helps mitigate risks and maintain data integrity. Compare and read user reviews of the best API Security software currently available using the table below. This list is updated regularly.

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    Salt

    Salt

    Salt Security

    The Salt Security API Security Platform protects APIs across their full lifecycle – build, deploy and runtime phases. Only Salt can capture and baseline all API traffic -- all calls and responses -- over days, weeks, even months. Salt uses this rich context to detect the reconnaissance activity of bad actors and block them before they can reach their objective. The Salt API Context Engine (ACE) architecture discovers all APIs, pinpoints and stops API attackers, and provides remediation insights learned during runtime to harden APIs. Only Salt applies cloud-scale big data to address API security challenges. Salt applies its AI and ML algorithms, which have been in the market for more than four years, to provide real-time analysis and correlation across billions of API calls. That level of context is essential for rich discovery, accurate data classification, and the ability to identify and stop “low and slow” API attacks, which occur over time. On prem solutions simply lack the data.
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