Best API security tools in 2026: Protect against sophisticated threats

APIs can pose a serious security risk for organizations. Many businesses have thousands of APIs, many of which they might not be aware of. 

The problem is that most APIs are protected by a negative security model, which only protects against known threats, leaving organizations vulnerable to credential-stuffing and other sophisticated attacks.

If this describes your company, the best API security tools can offer serious help. In this article, we’ll look at what these tools are, why they’re important, how they work, and review the seven best API security tools. 

What are API security tools?

API security tools are software solutions that are designed to protect your APIs from known and unknown security threats.

These tools’ main goal is to make sure that only trusted visitors (authorized users and systems) can access your company’s sensitive data. If your data is left unguarded, it’s like inviting hackers to waltz in and steal your valuables. By securing your APIs, you’re not just locking the door but also setting up safeguards to keep out anyone who doesn’t belong.

Why are API security tools important?

Here are the key benefits API security tools can bring to your organization:

1. Better data protection

API security tools help protect sensitive information, such as financial records and customer details, from unauthorized access. They do this by monitoring your API assets in real time and taking remediation actions if they detect suspicious activity.

This is incredibly important, as the average cost of a data breach is $4.88 million, and organizations simply can’t risk exposing critical data.

2. Improved regulatory compliance

Most industries are subject to regulations that require you to protect sensitive data. API security tools help with this through features like data encryption, automated threat detection, and access control. 

3. Continuous business continuity

API security breaches (and other breaches) quickly cause business disruptions, which are incredibly costly for organizations. According to Pingdom, downtime now costs $9,000 per minute for larger organizations and $5 million per hour for high-risk industries (such as healthcare or finance). Not to mention any fines or penalties that may be imposed.

Plus, business disruptions can easily damage your customers’ trust and reputation. 

How do API security tools work?

Securing APIs requires a multi-layered approach to protect against unauthorized access and potential data breaches. Here’s a closer look at how API security tools work:

1. API discovery: To begin, API security tools discover all of your API assets, whether it’s API endpoints, routes, domains, or undocumented shadow APIs. After this, your APIs are inventoried, which helps to modify security protocols according to your organization’s needs.

2. Real-time monitoring and testing: This is the bread and butter of API security tools. They continuously scan your APIs for known vulnerabilities, such as misconfigurations or injection flaws. For vulnerabilities not caught by standard scans, API security tools have techniques, like fuzz testing and behavioral analysis.

3. Incident response: If an API security tool detects a security incident, it can take actions to solve it, such as blocking malicious traffic, alerting your IT team, or activating automated workflows through SIEM or EDR integrations.

4. Integrations with your existing tools: API security tools can be integrated with your existing firewall appliances, RMM software, SIEMs, and other cloud security tools. Doing this, you can have more unified control over your entire security stack.

7 best API security tools

Let’s now move to the main topic of our article: the best API security tools in 2026. According to our research, the options are:

Rakuten SixthSense

Rakuten SixthSense aims to be a “unified observability” platform, allowing users to detect and monitor applications, data, and API security. Upon onboarding, Rakuten automatically discovers all new APIs. After this, your APIs will start being continuously monitored using advanced analytics and machine learning.

If issues are detected, you can trigger automated responses, like attack blocking, targeted rate limiting, and virtual patching.

G2 Rating: 4.6 out of 5.0 stars (50+ reviews)

Capterra Rating: n/a

Rakuten SixthSense Pricing:

• Free: Free for up to four users
• Pro: Free for up to 12 users
• Enterprise: Based on a custom quotation

Orca Security

With Orca’s API dashboard, you can track and analyze your API assets, including API endpoints, applications, domains, subdomains, path groups, and users.

Like Rakuten, Orca Security offers a broader cloud security solution, offering complete coverage across API exposure, identity risks, data security, misconfigurations, and other advanced threats. The benefit of Orca’s unified approach is that it correlates API risks with the wider cloud security context.

G2 Rating: 4.6 out of 5.0 stars (200+ reviews)

Capterra Rating: 4.8 out of 5.0 stars (50+ reviews) 

Orca Security Pricing:

• To get the pricing, you need to sign up for a demo on Orca Security’s website

Cequence API Security

Cequence specializes in protecting organizations’ APIs and applications from cyberattacks. It does this by first identifying all your API endpoints and then inventorying and assessing them for risks such as improper access controls, sensitive data exposure, and deviations from the published API specification.

For IT teams, Cequence offers an API security testing tool, which lets you test APIs, identifying and remediating pre-production and runtime vulnerabilities.

G2 Rating: 4.6 out of 5.0 stars (50+ reviews)

Capterra Rating: 5.0 out of 5.0 stars (10+ reviews)

Cequence Pricing:

• Cequence pricing is based on a custom quotation

Check Point CloudGuard WAF

CloudGuard WAF is a web and API security solution that uses contextual AI to protect your APIs and applications against known and unknown threats. Upon discovering new APIs, it differentiates them, which helps with tailoring your security program to meet the needs of your organizational goals.

To comply with relevant regulations and standards, CloudGuard WAF makes it easy to protect your sensitive data, such as financial and healthcare data, PII, and login credentials. 

G2 Rating: 4.4 out of 5.0 stars (10+ reviews)

Capterra Rating: 4.7 out of 5.0 stars (40+ reviews)

Check Point CloudGuard WAF Pricing:

• CloudGuard WAF pricing is based on a custom quotation. You can request it from Check Point’s website.

Cortex Cloud

To protect your APIs, you can integrate Cortex Cloud with your API gateway, whether it’s AWS, Azure, Kong, or CVCP, and scan traffic and analyze logs. The tool automatically monitors, manages, and enforces security policies across your API gateways. Cortex Cloud helps detect and alert you to potential security gaps, undocumented endpoints, and deviations from expected behavior. 

Cortex Cloud’s API inventory gives you an overview of your company’s API assets, giving you full control of the security measures you want to take.

G2 Rating: 4.1 out of 5.0 stars (90+ reviews)

Capterra Rating: n/a

Cortex Cloud Pricing:

• To get the pricing, you need to request a demo from Cortex’s sales team. 

Cloudflare API Shield

One of Cloudflare’s many products is Cloudflare API Shield, which helps to discover, validate, and protect your API endpoints automatically. 

API Shield is part of Cloudflare’s Application Security portfolio. In addition to API security, it also helps to stop thwarts DDoS attacks, block application attacks, stop bots, and monitor for supply chain attacks. 

G2 Rating: 4.5 out of 5.0 stars (500+ reviews)

Capterra Rating: 4.7 out of 5.0 stars (400+ reviews)

Cloudflare API Shield Pricing:

• The pricing is based on a custom quotation. Contact Cloudflare’s sales team.

Postman

Postman is a commonly used open-source API security tool primarily for API building, testing, and security. 

According to Postman, some of its key benefits over competitors are BYOK encryption for complete control over your API-related data, automated security rule enforcement, and security checks integrated with CI/CD pipelines to catch vulnerabilities.

G2 Rating: 4.6 out of 5.0 stars (1,200+ reviews)

Capterra Rating: 4.7 out of 5.0 stars (400+ reviews)

Postman Pricing:

• Free: Free for small teams starting to test APIs
• Basic: $14 per user, per month for a single team
  Professional: $29 per user, per month for large teams
• Enterprise: $49 per user, per month for enterprise teams

API security protocols and vulnerabilities

Securing APIs requires robust security protocols. From managing credentials to encrypting communication, these protocols are the backbone of a secure API environment. Here are the key security measures:

OAuth 2.0: Securing API access

OAuth 2.0 is a framework that grants secure, token-based access to APIs without exposing user credentials. By delegating authentication to trusted identity providers and issuing temporary tokens with limited scopes, it reduces risks such as data leaks and unauthorized access.

API keys: Simplified authentication

API keys are unique identifiers used to validate requests to an API. While easy to implement, they require secure handling to avoid exposure. Best practices include using HTTPS, limiting key permissions, and rotating keys regularly to mitigate risks.

JWT (JSON Web Tokens): Lightweight security

JWTs are compact tokens used for secure communication. They carry user data in a signed format, enabling APIs to authenticate requests without database lookups. Using cryptographic signatures ensures the integrity and authenticity of transmitted data.

SSL/TLS Encryption: Protecting Data in Transit

SSL and TLS encrypt data exchanged between clients and servers, safeguarding it from eavesdropping or tampering. TLS, the modern successor to SSL, ensures the confidentiality and integrity of sensitive API communications.

While these protocols are essential for securing APIs, vulnerabilities can still arise during implementation. To maintain a strong defense, it’s important to understand the risks and proactively address common security flaws.

Injection attacks (e.g., SQL injection):

Attackers can exploit poorly validated input fields to inject malicious code, often gaining unauthorized access to sensitive data. Proper input validation and using secure queries can help prevent these attacks.

Broken authentication and session management:

Weak authentication or poor session management can allow attackers to impersonate legitimate users and gain unauthorized access. Strong authentication methods, like OAuth and secure session handling ,help protect against this.

Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF):

• XSS: Attackers can inject harmful scripts into API responses, stealing user data or compromising sessions. Proper input sanitization can prevent this.
• CSRF: Attackers can trick users into performing actions they didn’t intend, exploiting the trust between the user’s browser and the API. Using anti-CSRF tokens and validating actions helps prevent this.

Insufficient logging and monitoring:

Without proper logging, suspicious activities can go undetected, giving attackers time to exploit vulnerabilities. Implementing monitoring tools and real-time alerts can help identify and respond to threats early.

Rate limiting and DDoS protection:

APIs that don’t limit requests can be overwhelmed by traffic, leading to service disruption or resource exploitation. Rate limiting and DDoS protection tools help prevent this from happening.

Mitigating these vulnerabilities involves secure coding practices, strong authentication, proper input validation, and continuous monitoring to protect your API and systems from potential threats.

Key takeaways from the article

The importance of APIs continues to increase for businesses. This means one thing: the potential security risks they introduce are also growing. 

If APIs are not well-secured, attackers can exploit them to steal data, disrupt services, or launch larger-scale attacks. To stay ahead of these threats, make sure your organization takes security measures, such as:

• Using the best API security tools, such as those reviewed in this article
• Adapt new technologies, like AI and Zero Trust Architecture
• Having strong authentication, like mTLS, OAuth 2.0, AND JWTs
• Discovering and inventorying all active and shadow APIs continuously
• Prioritizing API risks based on context

The need for the best API security tools has never been more significant (especially for enterprises). These tools equip you with the tools for managing and securing your API assets, which is critical in 2025 and beyond.