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Top 24 API Security Tools SaaS Companies in May 2026

As of May 2026, there are 24 SaaS companies in API Security Tools. They have combined revenues of $394.6M and employ 1.9K people. They have raised $899.6M and serve 150.3K customers combined.

API Security Tools are designed to protect application programming interfaces (APIs) from various security threats. These tools enable organizations to discover, manage, and secure their APIs throughout their lifecycle, ensuring that the data exchanged is confidential and integrity is maintained. Common features include authentication and authorization management, threat detection, and monitoring of API usage patterns to identify vulnerabilities and anomalies. Typical use cases for API security tools include protecting sensitive data transmission, preventing unauthorized access, and ensuring compliance with security standards. Users range from IT security teams and application developers to compliance officers who need to oversee and enforce security policies. These stakeholders typically rely on such tools to streamline security processes, enhance visibility, and respond effectively to potential security incidents.

Companies
24
Revenue
$394.6M
Funding
$899.6M
Employees
1.9K

Filters

Sorting: Highest -> Lowest

Filters

Top API Security Tools Companies

Showing 10 of 5 companies ranked by annual revenue.

1
DFNS

Paris, France

Crypto custody as an API

Revenue
$5.9M
Customers
-
Year founded
2020
Funding
$14.5M
Team size
55
Growth
44.71%
2
BOS Framework

Nashville, Tennessee, United States

Your seamless transition to microservices and security.

Revenue
$5.5M
Customers
-
Year founded
2018
Funding
$2M
Team size
25
Growth
35.03%
3
Corsha

United States

API Security Platform

Revenue
$5.4M
Customers
-
Year founded
2018
Funding
$14.9M
Team size
40
Growth
35.08%
4
Apisec.ai

San Francisco, California, United States

Apisec.ai is an enterprise-class API security management platform that delivers instant and continuous API security coverage and compliance

Revenue
$5.4M
Customers
-
Year founded
2018
Funding
$2M
Team size
47
Growth
59.6%
5
Curity

United States

Curity is the leading supplier of API-driven identity management, providing unified security for digital services. Curity Identity Server offers a unique combination of API security and identity and access management. it is used for logging in and securing millions of users'​ access to the web and mobile apps over APIs and microservices. Curity is built upon open standards and designed for development and operations. We enjoy the trust of large organizations in financial services, telecom, retail, energy and government services with operations across many countries which have chosen Curity for their enterprise-grade API security needs. To learn more, visit curity.io or contact us at [email protected] or +46 8-410 737 70 Follow us on Twitter: @curityio

Revenue
$5.3M
Customers
-
Year founded
2015
Funding
-
Team size
48
Growth
-

Inclusion Criteria

- Tools must provide API discovery and inventory capabilities. - Must include methods for threat detection and response. - Should offer the ability to manage authentication and authorization mechanisms. - Must support monitoring and auditing of API activity. - Not just focused on vulnerability scanning; must also include remediation guidance and risk prioritization. - Should integrate with existing security frameworks and tools within an organization. - Must facilitate compliance with relevant security standards and regulations.