There's some good historical data on SimFin (simfin.com), but it's missing the most recent data unless you pay. I suppose you could work on training your models

There's some good historical data on SimFin (simfin.com), but it's missing the most recent data unless you pay. I suppose you could work on training your models with the free data dump, do some back-testing, and then pay for the latest stuff if you have a viable model. SimFin is nice because they offer fundamental data (quarterly reports) and not just price data.