Both apisec and IMvision are available as SaaS, hybrid or on-prem solutions enabling GraphQL and REST API security for various industries - IT, banking, telecom and other. However, while apisec provides convenient Slack notifications, IMVision relies on email alerts, not easy to respond to.
Anyway, there is no integration with SIEM tools but AI algorithms are employed for detection of malicious activity. At the end of the day, API security tools cover much more than traditional API controls (like API authentication and authorisation).
Although IMVision covers nearly as many API vulnerabilities as apisec, the latter provides a wide range of integrations with tools like GitLab and Jenkins, a feature that IMVision lacks.
If you are not ready to consider procurement of a tool - you can check out our
API Penetration Testing Service.