Based on our record, Alpaca Data API should be more popular than StockData.org. It has been mentiond 8 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Have you looked at Alpaca's Market Data API or Polygon.io. Both premium options are reasonably priced and give you access to both historical and real time trades. Source: over 2 years ago
I think https://alpaca.markets/data still offers free api keys for research purposes. Source: over 2 years ago
Https://alpaca.markets/data - As you see you get 100% market coverage for all US exchanges and unlimited API / WebSocket access. They also have 1min bar historical data (I do not know about the tick level). I can not speak to the quality of the API Access as I have a TotalView subscription. Source: almost 3 years ago
Free tier for researchers, now $99/month for the algotrading access (link: https://alpaca.markets/data). Source: almost 3 years ago
Https://alpaca.markets/data free plan has 200 calls/minute limit which is what you want anyway. Source: about 3 years ago
As mentioned, I am sure that stockdata.org is not legit. Source: over 3 years ago
So then I stumbled upon stockdata.org which advertises commercial use plans as low as $9/month. My guess is it's so cheap because their data is relatively limited? (It doesn't even show bid/ask price, for example.) Then I was reading another company's website, Xignite specifically, which goes to great lengths to explain that not only do you need to pay them, the distributor, but you also need to pay the exchanges,... Source: over 3 years ago
Robinhood - Free stock trading service.
DailyStockMarketData.com - Daily stock market data in a convenient CSV
SparkFin - Learn the markets for free, profit forever.
Trigger Finance - IFTTT for the stock market
Alpaca - Open links from Slack via desktop apps: Notion, Spotify, Zoom, Miro, Telegram, Airtable, Figma and VK.
ClosingBell on Slack - Fetch stock market data from Slack with interactive messages