His Majesty's hired armed cutter Diligent (or Diligente) served the British Royal Navy during the French Revolutionary Wars. She was a small vessel, of 44 tons (bm) and six 2-pounder guns, and she served from 27 February 1793 to 1 November 1801.
Diligent recaptured Myrmidon.Myrmidon had been sailing from Newcastle with a cargo of lumber when a privateer captured her. Diligent sent her into Sheerness, where Myrmidon arrived around 14 July 1797.
Diligent, under the command of Mr. Matthew Randall, was in the fleet under Admiral Lord Duncan at the Battle of Camperdown on 11 October. Diligent's role was to stand off the larboard or lee division and repeat signals. After the battle, as a member of the fleet even though she did not participate in the combat, she was entitled to share in the £120,000 in prize money for the sale of the Dutch ships captured then. In 1847 the Admiralty awarded the Naval General service Medal with clasp "Camperdown" to any surviving claimants from the action. Diligent's officers and crew qualified.
On 24 October 1798 Sirius took two Dutch ships, Waakzaamheid and Furie in the Texel. The sloop Martin, Diligent, and several other vessels shared in the proceeds of the capture.
At some point, Diligent, still under Randall's command, recaptured William and Freedom.
In 1799 Diligent, under the command of Thomas Dawson, was on the Downs and North Sea station.
Diligente was among the vessels that shared in the proceeds of the capture of the galiot Neptunus on 29 March 1799.