So I will keep it short, but I am working in a startup, which is interested in algo trading and initially needs live data access of US stocks.
The data they are specifically interested in is live 1-second data. Mainly OHLC for now (but might also need order books, trades, and quotes data later).
First I was considering Alpaca Api but they don't provide 1-second aggregates in their Api, so now I am considering Polygon, Databento, Finnhub and other data sources but don't know which might be the best.
So does anyone have any recommendations or any previous experience in data sources for 1-second stock data?
The target is mainly stocks for now, not futures or forex. And I know all these data sources have a professional plan for enterprises (which costs like $1000+ per month). I don't think the startup would be interested in blowing large amounts of money without having the technicals sorted out.