In terms of “data aggregator sites” – I think the best source of this data today is on Kingscrowd, using their Ratings platform (and soon to be releasing the industry-wide analytics, which will help to more easily look at these types of trends across offerings).
Click on “Ratings“, then you can slice and dice data for 2300+ Reg CF and Reg A+ raises. They make it very easy to filter and sort based on security type (e.g. SAFE) and valuation/cap, so then you can get an idea if the terms of the deal are aligned with the market averages.
Full disclosure: I’m an investor in Kingscrowd (through an earlier equity crowdfunding round) and currently helping them out part-time as a software developer building their ratings and analytics platform.