HMS Mentor was the Massachusetts letter of marque Aurora, commissioned in 1780.

The Royal Navy captured her in July 1781 and took her into service as HMS Mentor.

While sailing to Port-au-Prince she came upon the wreck of HMS Stirling Castle and was able to rescue four men.

She sailed in July in company with the Massachusetts privateer Belisarius, James Munro, master, but the two ships separated.

[2] Mentor was one of the naval vessels that shared in the capture of the brigs Unity and Betsey, on 20 January 1783.