Alert was built at Dover in 1779. She patrolled in the Gulf of Biscay until Diligente captured her on 25 September 1780 off the Gironde. The French brought her into service as Alerte.
Alerte was attached to the squadron of Grasse, under Ensign Gallien de Chabons. She took part in the Battle of Fort Royal on 29 April and 30 April 1781.
On 28 November 1781, the 36-gun frigate HMS Perseverance recaptured her after a long battle. Auxiliary officer Galocheau was wounded and lost an eye.
Alert was sold to break up at Deptford in October 1792.
. Yves-Joseph de Kerguelen-Trémarec. 1796. Relation des combats et des évènements de la guerre maritime de 1778 entre la France et l'Angleterre. Imprimerie de Patris. French.
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