Is there a limit to how many searches I can do?

Yes. Free, non-commercial use of TinEye is limited to 100 searches per day and 300 searches per week.

Note: If you use a shared or dynamic IP address, you may reach your search limit more quickly than you’d expect if other people on your connection are also using TinEye. To avoid this create a TinEye account and make sure you are logged in. This way, only your own searches are counted by TinEye.