Goalkeeper Ali Aksoy and midfielder Dave Cowley have signed for the club, whilst striker Louis Dennis joins on a season-long loan from Football League Two outfit Dagenham & Redbridge.
Ali Aksoy was last with AFC Wimbledon, making his way up through the youth system. The 18 year-old Turkish 'keeper was previously with Arsenal and QPR as a youth.
Winger Dave Cowley spent last season with league rivals, Harlow Town. He spent time with West Ham United and Southend United as a youth player, before linking up with the Glenn Hoddle Academy in Spain. Cowley had been on trial with Grays previously at the start of last season.
Louis Dennis has signed on a season-long loan from the Daggers, where he was a product of their youth setup.
Also signing for Grays Ath is Jay Nash, a striker who played for Daggers' reserves and youth teams.