Best API Security Software

Compare the Top API Security Software as of July 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.

  • 1
    Quantum Armor

    Quantum Armor

    Silent Breach

    Your attack surface is the sum of every attack vector that can be used to breach your perimeter defenses. In other words, it is the total quantity of information you are exposing to the outside world. Typically, the larger the attack surface, the more opportunities hackers will have to find a weak link which they can then exploit to breach your network. Professional hackers typically follow the cyber kill chain when attacking a target, and surveying the target's attack surface is normally the very first step in this process; what is known as advanced reconnaissance. Reducing the attack surface can minimize risk further down the cyber kill chain, preventing attacks before they even occur by eliminating potential attack vectors as early as possible. The cyber kill chain is a method of categorizing and tracking the various stages of a cyberattack from the early reconnaissance stages to the exfiltration of data.
    Starting Price: From $49/asset/month
  • 2
    Fortinet FortiWeb Web Application Firewall
    Unprotected web applications and APIs are the easiest point of entry for hackers and vulnerable to a number of attack types. FortiWeb's AI-enhanced and multi-layered approach protects your web apps from the OWASP Top 10 and more. FortiWeb ML customizes the protection of each application, providing robust protection without requiring the time-consuming manual tuning required by other solutions. With ML, FortiWeb identifies anomalous behavior and, more importantly, distinguishes between malicious and benign anomalies. The solution also features robust bot mitigation capabilities, allowing benign bots to connect (e.g. search engines) while blocking malicious bot activity. FortiWeb also features API discovery and security, as well as threat analytics to identify meaningful security incidents. FortiWeb is available as an appliance, VM, and fully featured WAF-as-a-Service - which is available to trial and purchase in most cloud marketplaces.
    Starting Price: $30/mo for 1 app on SaaS
  • 3
    AppTrana

    AppTrana

    Indusface

    Indusface’s AppTrana is a fully managed web application firewall that ensures risk-based protection with its DDoS, API risk, and Bot mitigation services while assuring web acceleration with secure CDN. Combining automated scanning with manual pen-testing, it detects application vulnerabilities. All of this with 24x7 expert support to meet zero false-positive guarantees. Indusface is the only vendor to be named Customers’ Choice for WAAP in all the 7 segments of the Gartner VoC 2022 Report.
    Starting Price: $99/month
  • 4
    Signal Sciences

    Signal Sciences

    Signal Sciences

    The leading hybrid and multi-cloud platform that provides next-gen WAF, API Security, RASP, Advanced Rate Limiting, Bot Protection, and DDoS purpose built to eliminate the challenges of legacy WAF. Legacy WAFs weren’t designed for today’s web apps that are distributed across cloud, on-premise or hybrid environments. Our next-gen web application firewall (NGWAF) and runtime application self protection (RASP) increase security and maintain reliability without sacrificing velocity, all at the lowest total cost of ownership (TCO).
  • 5
    ImmuniWeb

    ImmuniWeb

    ImmuniWeb

    ImmuniWeb SA is a global application security company operating in over 50 countries, headquartered in Geneva, Switzerland. Most of ImmuniWeb customers come from regulated industries, such as banking, healthcare, and e-commerce. ImmuniWeb® AI Platform leverages award-winning AI and Machine Learning technology for acceleration and intelligent automation of Attack Surface Management and Dark Web Monitoring. The data is later leveraged for a threat-aware and risk-based Application Penetration Testing for web, mobile, and API security testing. ImmuniWeb is the only company that offers a contractual zero false-positives SLA with a money-back guarantee. ImmuniWeb’s AI technology is a recipient of numerous awards and recognitions, including Gartner Cool Vendor, IDC Innovator, and the winner of “SC Award Europe” in the “Best Usage of Machine Learning and AI” category. ImmuniWeb® Community Edition runs over 100,000 daily tests, being one of the largest application security communities
    Starting Price: $499/month
  • 6
    Traceable

    Traceable

    Traceable

    Meet the Industry’s Context-Aware API Security Platform Traceable identifies all of your APIs, and evaluates your API risk posture, stops API attacks that lead to incidents such as data exfiltration, and provides analytics for threat hunting and forensic research. With our solution, you can confidently discover, manage and secure all of your APIs, quickly deploy, and easily scale to meet the ongoing needs of your organization. If you’re planning on improving the data security posture in your APIs, Traceable would love the opportunity to discuss how we could help and share some of our lessons learned from working with enterprise customers like Canon, Informatica, Outreach, and many others.
    Starting Price: $0
  • 7
    Reblaze

    Reblaze

    Reblaze

    Reblaze is the leading provider of cloud-native web application and API protection, providing a fully managed security platform. Reblaze’s all-in-one solution supports flexible deployment options (cloud, multi-cloud, hybrid, data center and service mesh), deployed in minutes and includes state-of-the-art Bot Management, API Security, next-gen WAF, DDoS protection, advanced rate limiting, session profiling, and more. Unprecedented real time traffic visibility as well as highly granular policies enables full control of your web traffic. Machine learning provides accurate, adaptive threat detection, while dedicated VPC deployment ensures maximum privacy, performance and protection while minimizing overhead costs. Reblaze customers include Fortune 500 companies and innovative organizations across the globe.
  • 8
    CloudGuard AppSec

    CloudGuard AppSec

    Check Point Software Technologies

    Automate your application security and API protection with AppSec powered by contextual AI. Stop attacks against your web applications with a fully automated, cloud-native application security solution. Eliminate the need to manually tune rules and write exceptions every time you make an update to your web application or APIs. Modern applications demand modern security solutions. Protect your web applications and APIs, eliminate false positives and stop automated attacks against your business. CloudGuard uses contextual AI to prevent threats with absolute precision, without any human intervention as the application is updated. Protect web applications, and prevent OWASP Top 10 attacks. From implementation through runtime, CloudGuard AppSec automatically analyzes every user, transaction, and URL to create a risk score to stop attacks without creating false positives. In fact, 100% of CloudGuard customers maintain fewer than 5 rule exceptions per deployment.
  • 9
    open-appsec

    open-appsec

    open-appsec

    automatic web application & API security using machine learning open-appsec is an open-source initiative that builds on machine learning to provide pre-emptive web app & API threat protection against OWASP-Top-10 and zero-day attacks. It can be deployed as add-on to Kubernetes Ingress, NGINX, Envoy and API Gateways. open-oppsec simplifies maintenance as there is no threat signature upkeep and exception handling, like common in many WAF solutions.
  • 10
    Data Theorem

    Data Theorem

    Data Theorem

    Inventory your apps, APIs, and shadow assets across your global, multi-cloud environment. Establish custom policies for different types of asset groups, automate attack tools, and assess vulnerabilities. Fix security issues before going into production, making sure application and cloud data is compliant. Auto-remediation of vulnerabilities with rollback options to stop leaky data. Good security finds problems fast, but great security makes problems disappear. Data Theorem strives to make great products that automate the most challenging areas of modern application security. The core of Data Theorem is its Analyzer Engine. Utilize the Data Theorem analyzer engine & proprietary attack tools to hack and exploit application weaknesses continuously. Data Theorem has built the top open source SDK called TrustKit, used by thousands of developers. Our technology ecosystem continues to grow so that customers can continue to secure their entire Appsec stack with ease.
  • 11
    Apiiro

    Apiiro

    Apiiro

    Complete risk visibility with every change, from design to code to cloud. Industry-first Code Risk Platform™ A 360° view of security & compliance risks across applications, infrastructure, developers’ knowledge & business impact. Data-driven decisions are better decisions. Understand your security & compliance risks with a real-time inventory of apps & infra code behavior, devs knowledge, 3rd-party security alerts & business impact. From design to code to cloud. Security architects don’t have time to review every change & investigate every alert. Make the most of their expertise by analyzing context across developers, code & cloud to identify risky material changes & automatically build an actionable workplan. No one likes manual risk questionnaires, security & compliance reviews - they’re tedious, inaccurate & not synced with the code. When the code is the design, we must do better - trigger contextual & automatic workflows.
  • 12
    GlitchSecure

    GlitchSecure

    GlitchSecure

    Continuous Security Testing for SaaS Companies - Built by Hackers Automatically assess your security posture with continuous vulnerability assessments and on-demand pentests. Hackers don't stop testing, and neither should you. We use a hybrid approach that combines testing methodologies built by expert hackers, a real-time reporting dashboard, and continuous delivery of high-quality results. We improve the traditional pentesting lifecycle by continually providing expert advice, remediation verification, and automated security testing throughout the entire year. Our dedicated team of experts works with you to properly scope and review your applications, APIs, and networks to ensure in-depth testing coverage all year. Let us help you sleep better at night.
    Starting Price: $6,600 per year
  • 13
    Operant

    Operant

    Operant AI

    Operant AI shields every layer of modern applications, from Infra to APIs. Within minutes of a single-step deployment, Operant provides full-stack security visibility and runtime controls, blocking a wide range of common and critical attacks including data exfiltration, data poisoning, zero day vulns, lateral movement, cryptomining, prompt injection, and more. All with zero instrumentation, zero drift, and zero friction between Dev, Sec, and Ops. Operant's in-line runtime protection of all data-in-use, across every interaction from infra to APIs, brings a new level of defense to your cloud-native apps with zero instrumentation, zero application code changes and zero integrations.
  • 14
    AppSecure Security

    AppSecure Security

    AppSecure Security

    Anticipate and prevent system attacks from the most sophisticated adversaries with AppSecure’s offensive security stance. Discover critical exploitable vulnerabilities and continuously patch them with our advanced security solutions. Continuously fortify your security posture and uncover concealed vulnerabilities from a hacker’s perspective. Evaluate the efficacy of your security team’s readiness posture, detection, and response measures to tenacious hacker attacks on your network’s susceptible pathways. Identify and redress the key security lapses with our balanced approach that tests your APIs in accordance with the OWASP paradigm, along with tailored test cases for preventing any recurrences. Pentest as a service offers continuous, expert-led security testing to identify and remediate vulnerabilities, enhancing your website’s defenses against evolving cyber threats and making it secure, compliant, and reliable.
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