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Top 24 API Security Tools SaaS Companies in July 2026

As of July 2026, there are 24 SaaS companies in API Security Tools. They have combined revenues of $348.5M and employ 1.9K people. They have raised $905.6M 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
$348.5M
Funding
$905.6M
Employees
1.9K

Filters

Sorting: Highest -> Lowest

Filters

Top API Security Tools Companies

Showing 10 of 6 companies ranked by annual revenue.

1Kong Inc logo
Kong Inc

San Francisco, California, United States

Cloud-native API Gateway and API Middleware

Revenue
$100M
Customers
130
Year founded
2009
Funding
$344.3M
Team size
879
Growth
-
2Contrast Security logo
Contrast Security

Los Altos, California, United States

Contrast Security is the only Application and API Security platform purpose-built to detect and stop live application-layer attacks. It delivers real-time and always-on application security inside applications and APIs.

Revenue
$91.7M
Customers
-
Year founded
2014
Funding
$245M
Team size
240
Growth
-
3Salt Security logo
Salt Security

Palo Alto, California, United States

Salt detects and prevents zero-day API attacks with the power of AI. Deploys in minutes

Revenue
$75M
Customers
-
Year founded
2016
Funding
$270M
Team size
201
Growth
54.64%
4Oneloop logo
Oneloop

Seattle, Washington, United States

Easiest way to issue API Keys

Revenue
$14.8M
Customers
-
Year founded
2022
Funding
-
Team size
4
Growth
-
5Gravitee logo
Gravitee

Denver, Colorado, United States

Gravitee.io is an end-to-end solution for both synchronous and asynchronous API lifecycle management, built on an event-native API Gateway with support for REST, SOAP, Websockets, Webhooks, Kafka, MQTT, and more. Because of its breadth of capabilities and unique support for streaming data, Gravitee enables developers and business users all around the world to build, manage, and secure all their APIs in one place.

Revenue
$13.2M
Customers
-
Year founded
2016
Funding
-
Team size
120
Growth
-
6ImmuniWeb logo
ImmuniWeb

Geneva, Switzerland

web security testing and risk ratings

Revenue
$10.3M
Customers
120
Year founded
-
Funding
-
Team size
36
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.