Can plecos live with kissing gouramis?

Verdict
Yes

Yes. Plecos and kissing gouramis get along in the same tank. Both are fine at 72–82°F. Plan on at least 125 gal.

Common plecoCommon pleco72–86°F · pH 6.5–7.5 Kissing gouramiKissing gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–82°Common pleco 72–86°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Common pleco 6.5–7.5Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Common pleco · 15 inKissing gourami · 10 in0"2"4"6"8"10"12"14"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Common plecoKissing gourami
Temperature72–86 °F72–82 °F
pH6.5–7.56–8
Adult size15.0 in10.0 in
Minimum tank125 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsAlone or in pairs
DietHerbivoreOmnivore

Better tank mates for plecos

All common pleco tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can plecos live with kissing gouramis?

Yes. Plecos and kissing gouramis get along in the same tank. Both are fine at 72–82°F. Plan on at least 125 gal.

What temperature suits both plecos and kissing gouramis?

72–82 °F. Plecos need 72–86 °F, kissing gouramis need 72–82 °F.

What size tank do plecos and kissing gouramis need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.