The workflow decision
For long browser workflows, the useful comparison is whether Notte or Kernel can meet the following outcome: The original job reaches its expected terminal state within the selected account's browser-duration entitlement.
Per-action latency, session duration and reconnect behavior matter more than a headline startup number. An idle timeout and a maximum lifetime can end the run for different reasons.
A proposed acceptance case
A job visits several pages, starts a permitted long operation and waits for a result. Progress must survive ordinary pauses without silently creating a second job.
This is an evaluation design, not a claim that this workflow has been executed successfully on every provider.
| Part of the test | Required observation |
|---|---|
| Controlled input | A controlled multi-page workflow, a maximum wall-clock budget and an application job identifier. |
| Pass condition | The original job reaches its expected terminal state within the selected account's browser-duration entitlement. |
| Negative case | Delay one step beyond the caller's wait budget. Inspect whether the browser continues, stops or needs explicit cancellation; do not submit the operation twice. |
| Evidence to retain | Step checkpoints, original application job identifier, browser lifetime and final output. |
Documented mechanisms, side by side
These labels describe product mechanisms. The linked source and the acceptance case determine whether a mechanism meets this workflow's requirement.
| Requirement | Notte | Kernel |
|---|---|---|
| Browser control | Documented | Documented |
| Saved browser state | Documented | Documented |
| Live view | Documented | Documented |
| Deployment choice | Enterprise options | Check deployment offering |
Sources: docs.notte.cc [1] ↗docs.notte.cc [2] ↗docs.notte.cc [3] ↗docs.notte.cc [4] ↗kernel.sh [5] ↗kernel.sh [6] ↗kernel.sh [7] ↗kernel.sh [8] ↗
Browser control
Notte: Create an owned browser session, connect Playwright or Puppeteer over CDP, and stop the session when the work finishes. Browser lifecycle management remains necessary even when the control socket disconnects.
Kernel: Kernel exposes browser creation and control APIs. Its documentation distinguishes on-demand browsers from configured browser pools, so compare the acquisition path your application will actually use.
Sources: docs.notte.cc [1] ↗kernel.sh [2] ↗
Deployment ownership
Notte: Use a remote browser from your existing process or deploy the browser automation as a Notte Function. These choices put lifecycle, scheduling and monitoring responsibilities in different places.
Kernel: Kernel Apps move the automation process next to the browser. Alternatively, an external process can control a browser through the browser API. Choose based on execution locality and deployment ownership.
Sources: docs.notte.cc [1] ↗kernel.sh [2] ↗
Pricing model
Notte: The public usage rates are $0.01 per browser-hour, $0.05 per Function-hour and $10 per GB of managed proxy traffic. Paid plans return their price as usage credits. Price the relevant meters and plan eligibility for the workload.
Kernel: Use the plan and browser configuration in Kernel's pricing documentation. Managed networking, account allowances and app execution make a browser-hour comparison only one part of the decision.
Sources: notte.cc [1] ↗kernel.sh [2] ↗
What should change the choice?
Evaluate Notte when session ownership needs to sit alongside Python execution or authenticated state. Check the eligible session duration before a low hourly rate influences the choice.
Kernel: Kernel's browser-local Apps make execution placement part of the decision. Compare the repeated action path with the proposed Notte controller or Function deployment before concluding that a lifecycle or hourly-rate difference decides the workflow.
A provider with a proven long-running session contract may be the better choice when moving would change timeout or continuation behavior. Startup rankings have less weight once a browser is already running.
Sources: docs.notte.cc [1] ↗docs.notte.cc [2] ↗notte.cc [3] ↗kernel.sh [4] ↗kernel.sh [5] ↗kernel.sh [6] ↗
The cost boundary
Use the same attempted work and eligible account capacity in both estimates. The browser-hour rate does not include every proxy, execution or identity meter, and the cost of an incomplete job is still part of the workflow budget.
The workload evidence should include: Step checkpoints, original application job identifier, browser lifetime and final output.
Sources: notte.cc [1] ↗kernel.sh [2] ↗
Make a bounded pilot
Run the full workflow for its expected duration and verify progress, reconnect behavior and final completion.
Use the same authorized account, input and final-state check in each configuration. Treat a missing product contract as an open question; do not turn an undocumented capability into an unsupported claim or a successful test result.
- Record the source workflow's longest wait and the owner of each timeout.
- Move one long job without changing its application identifier or completion check.
- Keep the source runner available until target cancellation and final cleanup are verified.