Best API Security Software for Linux of 2025

Graylog empowers security teams by providing comprehensive insights across logs, events, and API interactions, which are crucial for identifying threats, examining incidents, and executing precise responses. With Graylog Enterprise, organizations can manage logs at scale, utilizing robust search capabilities, alert systems, and correlation features to speed up root cause investigations. Building upon this foundation, Graylog Security introduces enhanced threat detection, ready-to-use content for prevalent attack methods, and seamless integration with Security Operations Centers (SOCs). Meanwhile, Graylog API Security enhances oversight of the increasingly important API landscape by automatically discovering APIs, pinpointing sensitive data vulnerabilities, and detecting data breaches in real time. Collectively, the Graylog platform offers integrated, cost-effective security operations and API safeguarding—available both on-premises and in cloud environments—enabling teams to effectively identify, investigate, and address critical security issues.

Engineered for peak performance and efficient resource use, KrakenD can manage a staggering 70k requests per second on just one instance. Its stateless build ensures hassle-free scalability, sidelining complications like database upkeep or node synchronization. In terms of features, KrakenD is a jack-of-all-trades. It accommodates multiple protocols and API standards, offering granular access control, data shaping, and caching capabilities. A standout feature is its Backend For Frontend pattern, which consolidates various API calls into a single response, simplifying client interactions. On the security front, KrakenD is OWASP-compliant and data-agnostic, streamlining regulatory adherence. Operational ease comes via its declarative setup and robust third-party tool integration. With its open-source community edition and transparent pricing model, KrakenD is the go-to API Gateway for organizations that refuse to compromise on performance or scalability.

SKUDONET provides IT leaders with a cost effective platform that focuses on simplicity and flexibility. It ensures high performance of IT services and security. Effortlessly enhance the security and continuity of your applications with an open-source ADC that enables you to reduce costs and achieve maximum flexibility in your IT infrastructure.

Tyk is an Open Source API Gateway and Management Platform that is leading in Open Source API Gateways and Management. It features an API gateway, analytics portal, dashboard, and a developer portal. Supporting REST, GraphQL, TCP and gRPC protocols We facilitate billions of transactions for thousands of innovative organisations. Tyk can be installed on-premises (Self-managed), Hybrid or fully SaaS.

Ambassador Edge Stack, a Kubernetes-native API Gateway, provides simplicity, security, and scalability for some of the largest Kubernetes infrastructures in the world. Ambassador Edge Stack makes it easy to secure microservices with a complete set of security functionality including automatic TLS, authentication and rate limiting. WAF integration is also available. Fine-grained access control is also possible. The API Gateway is a Kubernetes-based ingress controller that supports a wide range of protocols, including gRPC, gRPC Web, TLS termination, and traffic management controls to ensure resource availability.

Protect your APIs by analyzing and protecting them with passive, inline, or API-based integration with any network component, such as an API gateway, proxy or CDN. Predefined policies that are fine-tuned based on threat patterns, which have been used to protect billions of API transactions every day, provide unmatched protection. An API-based architecture and rich user interface allow integration with threat intelligence feeds and other security components. Patented ML based analysis eliminates JavaScript integration pen-alties like slow page loads, extended development cycles, and forced mobile-app upgrade. ML-based analysis generates a unique Behavioral Footprint to identify malicious intent and continuously tracks attackers as they retool.

You can use your favorite debugging software to locally troubleshoot your Kubernetes services. Telepresence, an open-source tool, allows you to run one service locally and connect it to a remote Kubernetes cluster. Telepresence was initially developed by Ambassador Labs, which creates open-source development tools for Kubernetes such as Ambassador and Forge. We welcome all contributions from the community. You can help us by submitting an issue, pull request or reporting a bug. Join our active Slack group to ask questions or inquire about paid support plans. Telepresence is currently under active development. Register to receive updates and announcements. You can quickly debug locally without waiting for a container to be built/push/deployed. Ability to use their favorite local tools such as debugger, IDE, etc. Ability to run large-scale programs that aren't possible locally.

Authress offers a comprehensive Authentication API tailored for B2B needs. While authentication may seem straightforward at first glance, the intricacies of authorization can quickly escalate, making it unwise to navigate this complexity alone. Achieving robust authorization is a time-consuming endeavor; an average software team might spend around 840 hours developing authorization logic for basic scenarios, and this effort can multiply as additional features are integrated into the application. Lacking the necessary expertise exposes your organization to significant security vulnerabilities, potentially leading to breaches of user data, non-compliance with regulatory standards, and substantial financial repercussions. * Secure authorization API—Rather than constructing your own authorization framework, leverage our API for seamless integration. * Granular permissions—Establish various access levels and categorize them according to user roles, allowing for as much detail as needed. * Identity Provider integrations—Effortlessly connect your chosen identity providers through a straightforward API call. * SSO and comprehensive user management—Enjoy streamlined single sign-on capabilities along with complete control over user administration, ensuring a secure and efficient user experience.

Gravitee.io, the most cost-effective, performant, and cost-effective Open Source API Platform, allows your organization to securely publish, analyze, and secure your APIs. Gravitee.io's OAuth2 OpenID Connect (OIDC), and Financial-grade API(FAPI) certified servers allow you to manage your identities. Gravitee.io APIM allows you to control precisely who, when, and how your APIs are accessed by your organization. It is lightweight, flexible, and lightning-fast. Gravitee.io allows you to manage, monitor, deploy, and secure your APIs with strong governance features like API review and API quality. Your API consumers can fully engage with your business through a Gravitee.io portal. This will ensure high quality engagement in the digital age.

Resurface is a runtime API security tool. Resurface continuous API scanning allows you to detect and respond in real time to API threats and risks. Resurface is a purpose-built tool for API data. It captures all request and response payloads, including GraphQL, to instantly see potential threats and failures. Receive alerts about data breaches for zero-day detection. Resurface is mapped to OWASP Top10 and alerts on threats with complete security patterns. Resurface is self-hosted and all data is first-party. Resurface is the only API security system that can be used to perform deep inspections at scale. Resurface detects active attacks and alerts them by processing millions of API calls. Machine learning models detect anomalies and identify low-and slow attack patterns.

Pynt, an innovative API Security Testing Platform, exposes verified API threats by simulating attacks. We help hundreds companies, including Telefonica, Sage and Halodoc to continuously monitor, categorize and attack poorly secured APIs before hackers do. Pynt’s uses a unique hacking technology and an integrated shift-left strategy, using home-grown attack scenario, to detect real threats. It also helps to discover APIs and suggest fixes for verified vulnerabilities. Pynt is trusted by thousands of companies to protect the No. As part of their AppSec strategies, a number of companies rely on Pynt to secure the no.

Utilihive, a cloud-native big-data integration platform, is offered as a managed (SaaS) service. Utilihive, the most popular Enterprise-iPaaS (iPaaS), is specifically designed for utility and energy usage scenarios. Utilihive offers both the technical infrastructure platform (connectivity and integration, data ingestion and data lake management) and preconfigured integration content or accelerators. (connectors and data flows, orchestrations and utility data model, energy services, monitoring and reporting dashboards). This allows for faster delivery of data-driven services and simplifies operations.

Spherical Defense is an innovative API security solution that leverages deep unsupervised learning techniques to safeguard your APIs effectively. The Spherical Defense Express variant is designed for deployment on AWS and can be downloaded in just one minute, starting its protective measures within two hours at an economical rate of $1 per hour. After setting up your Spherical instance, it begins monitoring API traffic right away and continues to do so until it gathers enough data for initial model training. Once approximately 16,000 requests are processed, the system transitions to the training phase, where it refines its security model over about six hours before undergoing evaluation. As the system continues to receive new data, it adapts by training additional models to reflect changes in your API's traffic patterns over time. The process of training and adapting ensures ongoing protection, making it a dynamic and responsive security solution for your APIs. After the evaluation of the trained security model, the system is better equipped to handle future threats effectively.

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. The open-appsec engine learns how users normally interact with your web application. It then uses this information to automatically detect requests that fall outside of normal operations, and sends those requests for further analysis to decide whether the request is malicious or not. open-appsec uses two machine learning models: 1. A supervised model that was trained offline based on millions of requests, both malicious and benign. 2. An unsupervised model that is being built in real time in the protected environment. This model uses traffic patterns specific to the environment. open-oppsec simplifies maintenance as there is no threat signature upkeep and exception handling, like common in many WAF solutions.

Managing application delivery at scale can be challenging, but NetScaler simplifies the process. Whether you are firmly on-premises, fully in the cloud, or operating in a hybrid environment, NetScaler provides consistent functionality across all platforms. Its architecture is built on a single code base, ensuring that regardless of whether you opt for hardware, virtual machines, bare metal, or containers, the performance remains uniform. No matter if your audience consists of hundreds of millions of consumers or hundreds of thousands of employees, NetScaler guarantees reliable and secure application delivery. Renowned as the preferred application delivery and security solution for the largest enterprises globally, NetScaler is trusted by thousands of organizations, including over 90 percent of the Fortune 500, to deliver high-performance application services, robust application and API security, and comprehensive visibility across all operations. This widespread trust underscores NetScaler's vital role in today's digital landscape.

Astra is an end-to-end API security and vulnerability management platform built for engineering and DevSecOps teams. It provides full visibility into your API ecosystem, automatically discovering undocumented or forgotten endpoints across complex cloud environments. Using a combination of DAST scanning, penetration testing, and continuous monitoring, Astra identifies over 10,000 vulnerabilities including broken access control, injection flaws, and sensitive data leaks. Its Authorization Matrix feature gives a granular view of user privileges to prevent privilege escalation and unauthorized access. The platform seamlessly integrates with major cloud and development tools like AWS Gateway, GCP Apigee, NGINX, Postman, and Burp Suite. Astra’s traffic connectors monitor real-time API activity to uncover risky endpoints such as Zombie or Shadow APIs. Developers can collaborate directly on remediation through built-in workflows, detailed reports, and Jira or Slack integration. Backed by world-class pentesters and trusted by top enterprises, Astra helps organizations safeguard APIs with precision and scalability.