Midfielder Liam Hook and teammate JP Duncliffe have joined from Yaxley, with both enjoying lengthy stays at the club.
The two players featured heavily last season for the Cuckoos, as they ended 14th for the season.
Also joining the Saints is Stephane Bombelenga from Uxbridge.
The striker previously had spells with Eastbourne Borough in the National League South, before he signed for the Reds from Grinstead Town in 2021.
St Neots manager Pete Gill will hope the three new additions can spark a revival in form over the coming months, as they sit 19th in the Pitching In Northern Premier League Midlands Division.
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