Modulo vs Temporal: what's the difference?

Temporal is a durable execution platform. It guarantees that your code runs to completion, even through network failures, process crashes, or infrastructure outages. If a workflow is interrupted, Temporal resumes it from the last completed step. It is infrastructure for reliable code execution.

Modulo is a self-hosted platform for governing agent-powered software delivery. It focuses on validating agent outputs, managing human review, maintaining audit trails, and progressively granting autonomy. It is a governance layer for agent activity.

What Temporal does well

Temporal excels at ensuring code runs reliably. If you have a multi-step process that must complete exactly once, even through failures, Temporal is the right tool. It handles retries, state persistence, and error recovery automatically. It is battle-tested at scale.

What Temporal does not do

Temporal has no concept of agent output validation, deterministic gates, human-in-the-loop review, or progressive autonomy. It ensures that code runs, but it does not evaluate what the code produces. These are different concerns: Temporal guarantees execution; Modulo guarantees governance.

How they relate

Temporal and Modulo serve different purposes. A team could use Temporal to ensure reliable execution of their infrastructure, and Modulo to govern the agent outputs that flow through their SDLC. They are complementary.

The difference is what each guarantees. Temporal guarantees that your code will run. Modulo guarantees that your agent outputs will be validated, reviewed, and recorded before they reach production.

The principle behind this: deterministic gates catch failures before they reach a human reviewer, and audit as a first-class output means the history you inspect is exactly what happened.