Options Data
The GoogleFinance function offers a basic solution for current and historic stock data, but doesn’t offer any options data.
Market Data’s offering gives you current and historic options quotes going back 15+ years.
Intraday Data
GoogleFinance offers daily or weekly stock prices.
Market Data offers intraday prices down to the minute. Get 1, 5, 15-minute prices, or use any custom interval you like.
Free
GoogleFinance is free to use.
Market Data offers a free plan for up to 100 prices per day. Paid plans are available for reasonable prices for users needing large quantities of data.