You can track tech stack changes over time using Clay's Custom Signals feature. This lets you monitor specific technology adoption and changes on a regular schedule.
You can also use:
1. PredictLeads integration - Filter by "Last Detected Date After" to see recent tech additions
2. BuiltWith's "Find Technology Stack" action - Use the "Last Detected Date" filter to track when technologies were added
3. HG Insights integration - Compare tech stack data over time to identify changes in tools like Salesforce, Marketo, Workday, or NetSuite