docs(notes): update 2025-03-21-control-m-en.md

Author: lzwjava

notes/2025-03-21-control-m-en.md

@@ -44,4 +44,23 @@ Since Control-M’s features and interface may vary by version, consult these re
 - **Training Courses**: BMC offers formal training to master Control-M.
 - **Online Tutorials**: Look for community resources or videos for practical examples.
 
-By following these steps and exploring available resources, you’ll be well-equipped to use Control-M to automate and manage your workflows efficiently!
+By following these steps and exploring available resources, you’ll be well-equipped to use Control-M to automate and manage your workflows efficiently!
+
+---
+
+Control-M, developed by BMC Software, is **not free**. It is a commercial enterprise-grade workload automation tool designed for managing complex job scheduling and workflows across various systems. BMC Software licenses Control-M, and its pricing typically depends on factors such as the number of jobs, agents, or the scale of your deployment.
+
+### Licensing and Costs
+- **Paid License**: Control-M requires a purchased license, which can be tailored to your organization’s needs (e.g., based on job volume or features like advanced reporting).
+- **Subscription or Perpetual Models**: BMC may offer subscription-based pricing or a one-time perpetual license with annual maintenance fees.
+- **Enterprise Focus**: It’s aimed at businesses with robust automation needs, so costs reflect its scalability and support offerings.
+
+### Free Alternatives?
+There isn’t a free version of Control-M, but BMC occasionally provides **trial versions** or limited-time access for evaluation. You’d need to contact BMC directly or check their website for current trial options.
+
+If you’re looking for **free alternatives** to Control-M, consider open-source workload automation tools like:
+- **Apache Airflow**: Great for data workflows, though it’s more developer-oriented.
+- **Cron**: Basic scheduling on Unix systems, but lacks advanced features.
+- **Rundeck**: An open-source job scheduler with a community edition.
+
+For exact pricing or to explore a trial, I recommend visiting the official BMC Software website or reaching out to their sales team, as costs vary by use case and aren’t publicly listed. Let me know if you’d like more details on alternatives!