Simulate, Evaluate &
Fix Your AI Agents
Run thousands of realistic conversations against your agent, catch what breaks, and get the labeled datasets you need to evaluate and improve — all without touching production.
Run SimulationsTest coverage that
matches reality
Writing conversations one by one limits your coverage to what you can imagine. Simulation generates the data you need in minutes and surfaces failures you never would have found.
Realistic User Personas
Simulate the full spectrum of your user base — varied intents, tones, frustration levels, adversarial tactics, and multi-turn conversation flows.
Edge Cases at Scale
Manual testing is limited to what you think of. Simulation runs thousands of scenarios you wouldn't — and finds the ones that break your agent.
Eval-Ready Datasets
Every simulated conversation is judge-labeled and exportable. Feed it directly into your eval pipeline or fine-tuning workflow.
Your test coverage is smaller than you think
The gap between your test suite and real user behavior is where agents break. Simulation closes that gap.
Manual Testing is a Dead End
Writing test cases by hand is slow, shallow, and biased. You cover the happy path. You miss the edge cases. Weeks of work and you still don't know how the agent behaves under real user pressure.
Real Users Don't Follow the Script
They're impatient, ambiguous, frustrated, and creative. They combine intents you didn't anticipate. Simulation generates the full distribution of real-world behavior — not just the cases you imagined.
Evals Without Data Are Guesswork
A great eval harness means nothing without representative inputs. Simulation generates judge-labeled conversation datasets that reflect actual usage patterns across personas, tones, and goals.
Simulate. Evaluate. Ship.
- ✦Generate hundreds of varied user conversations in minutes
- ✦Automatically label failures with judge models
- ✦Export datasets directly to your eval and fine-tuning tools
- ✦Re-run simulations on every agent update to catch regressions
Simulate the users you haven't met yet
Rubric generates realistic user behavior across every dimension that matters — personas, intents, tones, adversarial tactics, and multi-turn flows.
From zero to full coverage
Connect Your Agent
Point Rubric at your agent endpoint. No code changes needed — connect via API, SDK, or direct integration in minutes.
Configure the Simulation
Define the user personas, intents, conversation depth, and adversarial tactics you want to test. Rubric generates the rest.
Review Failures & Export
Get a full report of failures, edge cases, and behavioral gaps. Export judge-labeled datasets for evals or fine-tuning.