Can guppies live with endlers?

Verdict
Yes

Yes. Guppies and endlers make a good pair. Both are fine at 72–82°F. Plan on at least 10 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 Endler's livebearerEndler's livebearer72–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–82°Guppy 72–82°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.8Guppy 6.8–7.8Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Guppy · 2 inEndler's livebearer · 1 in0"1"2"3"4"5"6"
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

GuppyEndler's livebearer
Temperature72–82 °F72–82 °F
pH6.8–7.87–8
Adult size2.0 in1.0 in
Minimum tank10 gal5 gal
TemperamentPeacefulPeaceful
Swims atTopTop
GroupGroups of 3+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can guppies live with endlers?

Yes. Guppies and endlers make a good pair. Both are fine at 72–82°F. Plan on at least 10 gal.

What temperature suits both guppies and endlers?

72–82 °F. Guppies need 72–82 °F, endlers need 72–82 °F.

What size tank do guppies and endlers need together?

At least 10 gal, set by the guppy. Add space for each extra fish.