Can mollies live with kissing gouramis?

Verdict
Yes

Yes. Mollies and kissing gouramis make a good pair. Both are fine at 72–82°F. Plan on at least 55 gal.

MollyMolly72–82°F · pH 7.5–8.5 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°Molly 72–82°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 7.5–8Molly 7.5–8.5Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Molly · 4 inKissing gourami · 10 in0"2"4"6"8"10"
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

MollyKissing gourami
Temperature72–82 °F72–82 °F
pH7.5–8.56–8
Adult size4.0 in10.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atTopMiddle
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for mollies

All molly tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can mollies live with kissing gouramis?

Yes. Mollies and kissing gouramis make a good pair. Both are fine at 72–82°F. Plan on at least 55 gal.

What temperature suits both mollies and kissing gouramis?

72–82 °F. Mollies need 72–82 °F, kissing gouramis need 72–82 °F.

What size tank do mollies and kissing gouramis need together?

At least 55 gal, set by the kissing gourami. Add space for each extra fish.