Worlds by Sparta

CLOSED BETA

Your agent’s next test starts here.

Worlds is now in closed beta. Tell us what your agent does and which plan you’re interested in. We review every application.

  1. 01Tell us what you’re building.
  2. 02We’ll review your use case and follow up by email.
  3. 03Once approved, get access and setup instructions.

Choosing a plan? Compare pricing

We use these details to review your application and contact you about Worlds. Applying does not start a paid subscription. See our privacy notice.

HOW THIS IS DIFFERENT

How Worlds fits with the tools you already use.

Keep the tools that help you evaluate your agent. Add controlled system state and explicit outcome checks.

Common testing approaches and the evidence Worlds adds
ApproachCommon useWhat Worlds adds
Eval platformsInspect traces, score outputs and compare agent behavior.A local system the agent can act on, with persisted state changes to use alongside your evaluations.
Mocks and sandboxesExercise integrations with test responses or provider test environments. Isolation and reset controls vary.A separate starting state for each test, deterministic replay, controlled failures and logical time within the documented connector scope.
Conversation simulatorsExercise what an agent says and how it handles a conversation.Checks on the records its actions change, including side effects its reply never mentions.

Capabilities vary by product and configuration. Worlds connector contracts and failure controls have documented limits; this comparison does not imply full provider parity.