The Software Equity Group (SEG) regularly publishes quantitative research on the software and SaaS market M&A activity. It is always great information and clearly shows the trends in the industry. While information providers like PitchBook and dealroom offer comprehensive data and analysis, they are paid services that cost thousands of dollars a year. SEG offers its research for free. Recently SEG published their August 2021 SaaS Index Update
Also published on Medium.