The best alternatives to The Daily Gieselmann are TNW, Index, and FundingPath. If these 3 options don't work for you, we've listed a few more alternatives below.
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FundingPath is a database of private tech companies that tracks and visualizes their funding history and valuations since they were founded. FundingPath collects funding and valuation data of famous tech companies and shows their growth trajectory visually.
This toolkit is made by salesfit.io. It lets you measure and improve product-market fit using data automatically collected during a purchase process (you can use different data though - their manual helps you to choose the right metric).