The best open source alternative to Tines is Tracecat. If that doesn't suit you, we've compiled a ranked list of other open source Tines alternatives to help you find a suitable replacement.
Tines alternatives are mainly Security Automation (SIEM/SOAR) Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Tines.
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.

Tracecat is an open source alternative to proprietary security orchestration, automation and response (SOAR) platforms like Tines and Splunk SOAR. It empowers security engineers to automate their workflows and playbooks without restrictions.
Key features:
Tracecat allows security teams to automate alert triage, threat enrichment, incident response and more. The platform scales to handle high volumes of workflows in parallel across isolated tenants. With both no-code and code-based options, it provides flexibility for teams of all technical levels.
By offering an open source alternative to proprietary SOAR tools, Tracecat aims to make powerful security automation accessible to more organizations. The self-hosted deployment model ensures sensitive security data and workflows remain under your control.