Debug production failures with full execution replay.
Pay for execution time and storage.
Nothing else.
Replay every execution with full input, output, and context.
You only pay for what actually runs, not noisy logs. Start free, keep team collaboration available, and upgrade only when debugging becomes mission-critical.
Used by teams shipping APIs, workflows, and AI systems
How it works
One API call failed — see input, output, and exact failure instantly.
Replay any failed execution with full context in seconds. No log grepping.
Not logs. Not metrics. Not traces.
Execution-level debugging — the layer between your code and your incidents.
Built for debugging, not full backend hosting. Shaped for critical-path replay and incident response — not replacing your runtime.
Free
Debug your code without paying anything.
Builder
Ship to production with full execution replay.
Costs less than one debugging session.
Pro
For teams that rely on debugging in production.
For teams debugging production issues daily.
Enterprise
Dedicated infrastructure, custom retention, and compliance.
How billing works
What you pay for
Executions
Count the real runs that matter, not every noisy event.
Compute time
Measure actual runtime, so cost tracks useful work.
Storage retained
Pay for the execution history you keep available.
Soft overage
No hard block when you grow. Flux keeps your debugging workflow running and adds predictable overage instead of shutting you off.
No surprise billing. You always see usage before you pay.
Unlike traditional tools
- No per-event pricing
- No noisy logs billing
- Only real execution cost
Simple, predictable pricing as you scale.
How much will my app cost?
Drag the slider to estimate your monthly executions.
Flat-rate until your plan limit. Overage only starts above the included execution volume.
Example
What will this cost me?
Typical usage: 10K – 500K executions / month
If you run 100K executions in a month, you stay comfortably inside Builder with full replay and 30-day retention.
If you grow past Pro, overage starts at $0.20 / 100K instead of interrupting your team.
That keeps pricing fair, predictable, and aligned with how much real debugging value you are getting.
Start without friction
Get your first replay in under 2 minutes.
Install the CLI, capture one execution, and see it in the dashboard — before you ever think about billing.
Install CLI -> capture one execution -> see replay.