List of the Top 25 Free API Security Software in 2025

SKUDONET offers IT executives an affordable solution that emphasizes ease of use and adaptability, ensuring optimal performance and security for IT services. With this innovative platform, you can seamlessly improve the security and reliability of your applications through an open-source ADC, allowing for significant cost savings and unparalleled flexibility within your IT framework. This approach not only streamlines operations but also empowers organizations to respond swiftly to changing technology needs.

Designed for optimal performance and effective resource management, KrakenD is capable of handling an impressive 70,000 requests per second with just a single instance. Its stateless architecture promotes effortless scalability, eliminating the challenges associated with database maintenance or node synchronization. When it comes to features, KrakenD excels as a versatile solution. It supports a variety of protocols and API specifications, providing detailed access control, data transformation, and caching options. An exceptional aspect of its functionality is the Backend For Frontend pattern, which harmonizes multiple API requests into a unified response, thereby enhancing the client experience. On the security side, KrakenD adheres to OWASP standards and is agnostic to data types, facilitating compliance with various regulations. Its user-friendly nature is bolstered by a declarative configuration and seamless integration with third-party tools. Furthermore, with its community-driven open-source edition and clear pricing structure, KrakenD stands out as the preferred API Gateway for enterprises that prioritize both performance and scalability without compromise, making it a vital asset in today's digital landscape.

Cloudflare serves as the backbone of your infrastructure, applications, teams, and software ecosystem. It offers protection and guarantees the security and reliability of your external-facing assets, including websites, APIs, applications, and various web services. Additionally, Cloudflare secures your internal resources, encompassing applications within firewalls, teams, and devices, thereby ensuring comprehensive protection. This platform also facilitates the development of applications that can scale globally. The reliability, security, and performance of your websites, APIs, and other channels are crucial for engaging effectively with customers and suppliers in an increasingly digital world. As such, Cloudflare for Infrastructure presents an all-encompassing solution for anything connected to the Internet. Your internal teams can confidently depend on applications and devices behind the firewall to enhance their workflows. As remote work continues to surge, the pressure on many organizations' VPNs and hardware solutions is becoming more pronounced, necessitating robust and reliable solutions to manage these demands.

Tyk is a prominent Open Source API Gateway and Management Platform, recognized for its leadership in the realm of Open Source solutions. It encompasses a range of components, including an API gateway, an analytics portal, a dashboard, and a dedicated developer portal. With support for protocols such as REST, GraphQL, TCP, and gRPC, Tyk empowers numerous forward-thinking organizations, processing billions of transactions seamlessly. Additionally, Tyk offers flexible deployment options, allowing users to choose between self-managed on-premises installations, hybrid setups, or a fully SaaS solution to best meet their needs. This versatility makes Tyk an appealing choice for diverse operational environments.

Graylog Security, built on the robust Graylog Platform, stands out as a premier solution for threat detection, investigation, and response (TDIR), designed to enhance cybersecurity operations through a user-friendly workflow, an efficient analyst experience, and cost-effectiveness. This solution aids security teams in minimizing risks and boosting essential metrics such as Mean Time to Detect (MTTD) by refining threat detection capabilities while simultaneously decreasing Total Cost of Ownership (TCO) thanks to its inherent data routing and tiering features. Moreover, Graylog Security speeds up incident response times by allowing analysts to swiftly tackle urgent alerts, effectively lowering Mean Time to Response (MTTR). With its integrated SOAR capabilities, Graylog Security not only automates tedious tasks and streamlines workflows but also significantly improves response efficiency, thereby enabling organizations to proactively identify and mitigate cybersecurity threats. This comprehensive approach makes Graylog Security a vital asset for any organization looking to strengthen its cybersecurity posture.

Ambassador Edge Stack serves as a Kubernetes-native API Gateway that delivers ease of use, robust security, and the capability to scale for extensive Kubernetes environments globally. It simplifies the process of securing microservices by offering a comprehensive suite of security features, which encompass automatic TLS, authentication, and rate limiting, along with optional WAF integration. Additionally, it facilitates fine-grained access control, allowing for precise management of user permissions. This API Gateway functions as an ingress controller based on Kubernetes, and it accommodates an extensive array of protocols, such as gRPC, gRPC Web, and TLS termination, while also providing traffic management controls that help maintain resource availability and optimize performance. Overall, Ambassador Edge Stack is designed to meet the complex needs of modern cloud-native applications.

Enhance the security of your APIs by conducting thorough analyses and safeguarding them through passive, inline, or API-driven integration with various network elements, including API gateways, proxies, or CDNs. Utilizing predefined policies that have been meticulously adjusted according to prevalent threat patterns, which have effectively safeguarded billions of API transactions daily, ensures unparalleled defense. A robust API-centric architecture paired with a comprehensive user interface facilitates seamless integration with threat intelligence feeds and additional security measures. Moreover, a patented machine learning-based analysis method mitigates the drawbacks of JavaScript integration, such as slow page loading times, prolonged development cycles, and the necessity for mobile app updates. This ML-driven approach creates a distinctive Behavioral Footprint that helps in recognizing harmful intentions while consistently monitoring attackers as they adapt their strategies, reinforcing the overall security framework. With these advanced technologies at your disposal, organizations can significantly bolster their API security posture against evolving threats.

Introducing the leading API security platform that understands the context of the industry. Traceable detects all your APIs, assesses their risk levels, prevents API-related attacks that can result in data breaches, and offers analytics for both threat detection and investigative purposes. By utilizing our platform, you can efficiently identify, oversee, and protect every aspect of your APIs, while also enabling rapid deployment and seamless scalability to adapt to your organization's evolving requirements. This comprehensive approach ensures that your API security remains robust in the face of emerging threats.

SyncTree aims to serve as a comprehensive "Super Connecting Platform" designed to seamlessly link any desired services. By incorporating SyncTree STUDIO, a tool that enables users to construct backend business logic through block coding, alongside Block Store, which functions as a marketplace for trading pre-designed backend function blocks similar to an App Store, users can effectively harness data and interconnect services, paving the way for boundless service growth. This innovative approach allows for enhanced flexibility and creativity in service integration.

Beagle Security enables rapid detection and resolution of security vulnerabilities in websites and APIs. Its AI-driven core enhances the selection of testing cases, minimizes false positives, and delivers precise vulnerability assessment reports. You can seamlessly integrate it into your CI/CD pipeline and communication tools, allowing for automated and ongoing vulnerability evaluations. By following our outlined steps, you can rectify security flaws and bolster your website's defenses. Should you have any security inquiries or require support, our dedicated security team is ready to assist you. Our foundation was built on the mission to offer cost-effective security solutions tailored for expanding businesses. Years of industry experience and extensive research have paved the way for our present achievements. The continuous advancement of artificial intelligence is aimed at reducing manual labor and improving the effectiveness of penetration testing, ensuring that your security efforts remain cutting-edge and efficient. Embrace Beagle Security to safeguard your digital presence and stay ahead of potential threats.

You have the option to utilize your preferred debugging software to address issues with your Kubernetes services on a local level. Telepresence, an open-source solution, facilitates the execution of a single service locally while maintaining a connection to a remote Kubernetes cluster. Originally created by Ambassador Labs, known for their open-source development tools like Ambassador and Forge, Telepresence encourages community participation through issue submissions, pull requests, and bug reporting. Engaging in our vibrant Slack community is a great way to ask questions or explore available paid support options. The development of Telepresence is ongoing, and by registering, you can stay informed about updates and announcements. This tool enables you to debug locally without the delays associated with building, pushing, or deploying containers. Additionally, it allows users to leverage their preferred local tools such as debuggers and integrated development environments (IDEs), while also supporting the execution of large-scale applications that may not be feasible to run locally. Furthermore, the ability to connect a local environment to a remote cluster significantly enhances the debugging process and overall development workflow.

We are creators driven by a clear purpose. Our passion lies in developing products that enhance global security. Throughout our professional journeys, we've crafted numerous enterprise solutions at both emerging startups and established firms such as Splunk, Cisco, Symantec, and McAfee, where we frequently had to develop security functionalities from the ground up. Pangea introduces the pioneering Security Platform as a Service (SPaaS), which consolidates the disjointed landscape of security into a streamlined collection of APIs, allowing developers to seamlessly integrate security into their applications. This innovative approach not only simplifies security implementation but also ensures that developers can focus more on building their core products.

Introducing Treblle: a dynamic Software Development Kit (SDK) specifically designed to accelerate the development of REST-based APIs. This innovative toolkit provides deep insights into the complex metadata associated with each API request, along with the ability to monitor API traffic in real time. Leverage the strength of powerful analytics while enjoying a complete suite of API governance features. Experience the advantages of automated API documentation, which significantly enhances the efficiency of your projects. Treblle goes beyond the conventional by offering automated security audits for each request, allowing you to refine your workflows effectively. With support for over 18 languages and frameworks, you can ensure smooth integration across your organization while strengthening security measures. Empower your teams to create, deploy, and maintain APIs with remarkable speed, ultimately transforming how your organization approaches API development and management. Additionally, Treblle fosters a collaborative environment where developers can easily share insights and best practices, further enhancing overall productivity.

Panoptica simplifies the process of securing containers, APIs, and serverless functions while helping you manage your software bills of materials. It conducts thorough analyses of both internal and external APIs, assigns risk assessments, and provides feedback accordingly. The policies you implement dictate which API calls the gateway permits or blocks. As cloud-native architectures empower teams to develop and deploy software with remarkable speed to meet the demands of the contemporary market, this rapid pace introduces potential security vulnerabilities. Panoptica addresses these challenges by offering automated, policy-driven security and visibility throughout the entire software development lifecycle. With the rise of decentralized cloud-native architectures, the number of potential attack vectors has surged, heightening the risk of security incidents. Additionally, the evolving computing landscape has further amplified concerns regarding security breaches. Consequently, having a comprehensive security solution that safeguards every phase of an application's lifecycle, from development to runtime, is not just beneficial but vital for maintaining robust security standards. This holistic approach ensures that organizations can innovate without compromising their security posture.

Gravitee.io stands out as an exceptionally affordable and high-performing Open Source API Platform that empowers organizations to securely publish, analyze, and protect their APIs. With its certified OAuth2 OpenID Connect (OIDC) and Financial-grade API (FAPI) servers, Gravitee.io enables effective identity management. The platform's API management features allow for precise control over who can access your APIs, as well as the timing and manner of that access. Its lightweight design, combined with flexibility and impressive speed, makes it an ideal choice for developers. Gravitee.io also offers comprehensive tools for managing, monitoring, deploying, and securing APIs, complemented by robust governance features such as API reviews and quality assessments. Additionally, the Gravitee.io portal enhances the engagement experience for API consumers, fostering meaningful interactions and ensuring that organizations thrive in the digital landscape. By leveraging Gravitee.io, businesses can significantly elevate their API strategy and achieve superior operational efficiency.

Utilize comprehensive analytics derived from your user behavior API to uncover valuable insights into customer interactions, thereby improving their experiences. Promptly tackle issues using detailed high-cardinality API logs that facilitate thorough analyses based on various parameters, body fields, customer attributes, and other relevant aspects. Obtain an in-depth understanding of the users interacting with your APIs, their behavioral patterns, and the details of the data they transmit. Pinpoint crucial moments where user engagement wanes within your conversion funnel and adjust your product strategy to address these drop-offs effectively. Implement automatic notifications for customers approaching rate limits, using deprecated APIs, or displaying other notable behaviors, enhancing responsiveness. Discover how developers are utilizing your APIs and monitor vital funnel metrics such as activation rates and Time to First Hello World (TTFHW) to gauge effectiveness. Differentiate developers by their demographic data and marketing attribution SDKs to reveal strategies that will boost your key performance indicators, ensuring a focus on actions that yield significant results while allowing for ongoing modifications based on analytical insights. By keeping a close watch on these components, you can cultivate a more productive relationship with your API users, fostering long-term engagement and satisfaction. In doing so, you will create an environment where both your users and your product can thrive simultaneously.

TeejLab is at the forefront of combining data science and machine learning to help organizations effectively manage the intricacies of the API economy. As the only solution globally tailored for API governance, we encourage you to evaluate your security and compliance measures concerning mainframe and legacy systems that interact with both internal and external information systems via APIs. Our groundbreaking software composition analysis tool is uniquely designed to identify shadow, hidden, private, and public APIs through a carefully developed knowledge base. Similar to how Google changed the game for websites, TeejLab is poised to transform the landscape of Web APIs. Our adaptable product suite meets the varied API governance needs of businesses and communities affordably, while also enabling the easy integration of new features as requirements evolve. Whether your organization seeks to discover and benchmark APIs or is an established producer or consumer aiming to enhance its offerings, we provide an all-encompassing solution tailored to drive your success. By leveraging our expertise, we empower organizations to confidently navigate the rapidly evolving digital environment and seize new opportunities for growth. Ultimately, our commitment is to ensure that you stay ahead in this dynamic landscape.

GraphQL continues to impress, and we are taking its functionality to new heights. Inigo provides a seamless integration platform that works with any GraphQL server, elevating your API experience by tackling issues related to security, compliance, analytics, and continuous delivery, which enables businesses to grow with confidence. Relying on DIY GraphQL solutions can introduce unnecessary security vulnerabilities and operational challenges. Inigo simplifies this process, offering user-friendly tools that conserve your valuable time and resources. Developing custom solutions can be both a lengthy and expensive endeavor. With our enhanced CI/CD integration tools, developers can focus on their core tasks without the distraction of additional complications. As companies scale their GraphQL implementations, they often face unique operational challenges. Our solutions effectively address these development and delivery issues, while a self-service workflow ensures that your projects proceed without interruptions. If you have concerns about DDoS attacks, data breaches, or managing access, you can now tackle all of your GraphQL security issues with confidence. Protect against the vulnerabilities that come with GraphQL parsers and resolvers, promoting a more secure and efficient API environment. Inigo equips you to navigate the complexities of GraphQL confidently, freeing you from the usual frustrations and allowing for a more streamlined development process. With these improvements, your API management can transform into a more reliable and effective experience.

You have the option to send API test requests either through the user interface form or by invoking the EthicalCheck API using tools like cURL or Postman. To submit your request successfully, you'll need a publicly accessible OpenAPI Specification URL, a valid authentication token that lasts at least 10 minutes, an active license key, and your email address. The EthicalCheck engine autonomously conducts security tests tailored for your APIs based on the OWASP API Top 10 list, efficiently filtering out false positives from the results while generating a concise report that is easy for developers to understand, which is then delivered directly to your email inbox. According to Gartner, APIs are the most frequently targeted by attackers, with hackers and automated bots taking advantage of vulnerabilities, resulting in significant security incidents for many organizations. This system guarantees that you view only authentic vulnerabilities, as any false positives are systematically removed from the results. Additionally, you can create high-caliber penetration testing reports that are suitable for enterprise-level use, enabling you to share them confidently with developers, customers, partners, and compliance teams. Employing EthicalCheck can be compared to running a private bug-bounty program that significantly enhances your security posture. By choosing EthicalCheck, you are making a proactive commitment to protect your API infrastructure, ensuring peace of mind as you navigate the complexities of API security. This proactive approach not only mitigates risks but also fosters trust among stakeholders in your security practices.

Akto is a rapid, open-source API security platform that enables users to set up in just one minute. Security teams utilize Akto to keep an ongoing inventory of APIs, assess them for vulnerabilities, and identify issues during runtime. The platform includes tests for all categories from the OWASP Top 10 and HackerOne Top 10, such as Broken Object Level Authorization (BOLA), authentication flaws, Server-Side Request Forgery (SSRF), Cross-Site Scripting (XSS), and various security configurations. With its robust testing engine, Akto conducts a range of business logic tests by analyzing traffic data to discern API usage patterns, effectively minimizing false positives. Additionally, Akto supports integration with a variety of traffic sources, including Burpsuite, AWS, Postman, GCP, and various gateways, enhancing its usability across different environments. This adaptability makes Akto a valuable tool for ensuring the security of APIs in diverse operational settings.

Pynt is a cutting-edge API Security Testing Platform that unveils authenticated API vulnerabilities through simulated attacks. We assist numerous organizations, such as Telefonica, Sage, and Halodoc, in consistently monitoring, classifying, and preemptively addressing inadequately secured APIs before malicious hackers can exploit them. Leveraging a distinctive hacking methodology and an integrated shift-left approach, Pynt employs proprietary attack scenarios to identify genuine threats. In addition, it facilitates the discovery of APIs and provides recommendations for rectifying confirmed vulnerabilities. With the trust of thousands of businesses, Pynt plays a crucial role in safeguarding their applications. Many companies incorporate Pynt into their application security strategies to ensure robust protection against potential threats. This reliance on Pynt underscores its importance in the ever-evolving landscape of API security.

Authress provides an efficient Authorization API tailored for your application, as managing authorization can become intricate very quickly. While it may appear straightforward at first glance, numerous underlying complexities can arise, making it an undertaking best not approached alone. Achieving effective authorization is a time-consuming task, with straightforward implementations averaging around 840 hours, and this duration increases significantly with the addition of more features to your application. Your application holds the potential to be your most significant security risk; without proper expertise, it can become vulnerable to malicious threats. Failing to implement robust authorization exposes you to the dangers of user data breaches, regulatory non-compliance, and substantial financial repercussions. Authress offers a secure authorization API, allowing you to avoid the pitfalls of developing your own authorization framework by simply leveraging our comprehensive solution. Designed by developers for developers, it features granular permissions that let you establish multiple levels of access organized by user role, allowing for precise control. Additionally, with seamless identity provider integrations, connecting to any ID provider is as simple as making an API call, ensuring smooth and secure user authentication. This way, you can focus on enhancing your application while leaving the complexities of authorization to us.

The rise of hackers targeting vulnerabilities within API frameworks is alarming. To protect sensitive information and prevent data breaches, it is crucial to implement robust security measures for APIs. APIsec excels in identifying critical weaknesses in API logic that could be exploited by cybercriminals to gain unauthorized access to private data. Unlike traditional security solutions that mainly address common threats such as injection attacks and cross-site scripting, APIsec thoroughly examines the entire API, making sure that every endpoint is secured against potential exploitation. Leveraging APIsec allows you to identify possible vulnerabilities in your APIs before they are launched, thereby thwarting hackers before they can strike. APIsec evaluations can be performed at any stage of the development lifecycle, helping to uncover weaknesses that might unintentionally permit malicious individuals to access sensitive information. Integrating security does not have to slow down the development process; APIsec aligns seamlessly with DevOps methodologies, offering continuous visibility into API security. Instead of relying on scheduled penetration tests, which can take time, APIsec provides swift feedback in a matter of minutes, allowing developers to work quickly while still safeguarding their APIs. By adopting APIsec, organizations can achieve an effective equilibrium between security and efficiency in their development processes, ensuring that they remain resilient against evolving threats. This proactive approach not only enhances security but also fosters a culture of vigilance and responsibility within development teams.

Developers can enhance their security infrastructure with essential building blocks provided by BoxyHQ. This platform features a comprehensive set of APIs designed for enterprise compliance, security, and privacy, enabling engineering teams to accelerate their Time to Market while maintaining robust security measures. With minimal coding effort, teams can integrate a variety of critical functionalities, whether they choose a SaaS model or a self-hosted solution. The available features include Enterprise Single Sign-On (SAML/OIDC SSO), Directory Synchronization, detailed Audit Logs, and a Data Privacy Vault that adheres to PII, PCI, and PHI compliance standards. By leveraging these tools, organizations can effectively safeguard their data and streamline user authentication processes.

Open-appsec is an innovative open-source project that leverages machine learning to deliver proactive security measures for web applications and APIs, safeguarding against the OWASP Top 10 vulnerabilities as well as zero-day exploits. This system can be seamlessly integrated as an add-on to Kubernetes Ingress, NGINX, Envoy, and various API Gateways. The core engine of open-appsec observes typical user interactions with your web application, utilizing this behavior data to identify any requests that deviate from established norms, subsequently forwarding these anomalies for further scrutiny to determine their potential maliciousness. To achieve this, open-appsec employs two distinct machine learning models: 1. A supervised model developed offline, drawing insights from millions of both malicious and harmless requests. 2. An unsupervised model that evolves in real time within the protected environment, focusing on the unique traffic patterns of that specific setting. In addition to its robust detection capabilities, open-appsec streamlines maintenance by eliminating the need for frequent threat signature updates and exception management, which are often prerequisites in many conventional WAF solutions. Overall, open-appsec not only enhances security but also reduces the complexity typically associated with managing web application firewalls.