It is up to you to find a ride to Sunnyvale and the hotel from the airport once you arrive. You have some options which are outlined below and you can find additional details on the Getting Around page.
Remember, rush hour in the San Francisco area starts about 2:45pm and goes until 6:45pm on Fridays so the prices below could be higher.
AC Hotel by Marriott Sunnyvale Moffett Park address: 1235 Bordeaux Dr, Sunnyvale, CA 94089. (Be sure to type in the full hotel name and address as there is another AC Hotel Sunnyvale Cupertino hotel which is much further away).
TETRA Autograph Collection address: 400 W Java Dr, Sunnyvale, CA 94089
Super Shuttle offers a range of options and their lowest prices are cheaper than taxi cabs but more expensive than Lyft or Uber.
This is the cheapest option, other than public transit, and can be reasonably fast. Both ride sharing services operate at the airport. A ride to the hotel will probably cost between $80-$100.
The cheapest, but slowest, option is to use a mix of public transit. It will probably cost about $30. Take the BART from the International terminal at SFO and transfer at the Millbrae station to Caltrain, then take a short cab/Uber/Lyft ride to the hotel from the Sunnyvale Caltrain stop.
This is one of the fastest options and will probably cost between $120 and $140.
A cab, Lyft, or Uber ride is recommended. It's reasonably fast and should not cost very much.