What are some investing tools that are normally locked behind a paywall or a login wall?

Hi all, I’m building a stock research website that has ai write reports on stocks quarterly based on their SEC filings, and I am now looking to expand beyond the core product by offering some tools investors commonly use for research. My website doesn’t charge for anything, and I don’t plan on adding login walls for anything anytime soon. What are some tools you guys find valuable that normally are paid or locked behind a login wall that you’d like to see free and anonymous? (Not promoting my si

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