Saebe struck in the first half to put United on course for their first league win of the season — but the tables were turned after the break.
Kidderminster’s goals came from Luke Whitty, Cal Parker and Reece Jacobs.
Boston (4-3-3): Travis Portas; Daniel Worthington, Ryan Payne (Joe Money 25), Daniel Moulds, Ollie Price (Joe Cain 12); Jack Dykes, Liam Moran, Miles Lynch; Conor Allen (Karolis Andriulionis 55), Louis Saebe, Scott Floyd.