Reddit is "such a buy," Cramer said. The "Mad Money" host also looked at ServiceNow, First Solar, Sunbelt Rentals and Super Micro Computer.

"Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Reddit is "such a buy," Cramer said. The "Mad Money" host also looked at ServiceNow, First Solar, Sunbelt Rentals and Super Micro Computer.