Comparisons

Sumn, next to what you already know.

Every page compares what actually ships, names where the other tool is genuinely strong, and ends with a decision instead of a shrug.

28 Jul 2026comparison

Sumn vs Temporal

Temporal makes the code you write survive crashes. Sumn runs agent processes with the bounds enforced. Two layers, and we looked hard at building on theirs.

The tools these pages cover

Two kinds of tool show up here: durable execution engines, and the clouds that run coding agents. Plenty of teams already run one, and often they should keep it.

If you're still working out what the category is, start with the learn pages. They define the concepts these comparisons assume you have.