Kernel alternatives
The highest-scoring alternative to Kernel is Steel at 90/100 on the AgentReady, against 89/100 for Kernel.
All scored in Browser Automation.
What Steel does that Kernel does not
Steel passes no mandatory sales call, agent-compatible signup flow, fast time to first request, copyable quickstart, and Kernel fails them. That is the whole of the gap between the two scores, so if none of those matter to your agent the ranking above overstates the difference.
Why people look for an alternative
Kernel fails authentication documented, no mandatory sales call, agent-compatible signup flow, fast time to first request, copyable quickstart, idempotency support. Each one is a place an unattended run stops, which is usually what sends someone looking in the first place.
Where Kernel loses the points
| Pillar | Kernel | What it measures |
|---|---|---|
| Discover | 100 | Can an agent find it at all: sitemap, robots, structured data. |
| Understand | 92 | Is there a spec, an llms.txt, a machine-readable description. |
| Adopt | 71 | Signup, keys, SDKs, and whether a human has to be involved. |
| Operate | 94 | Rate-limit headers, errors, status, and behaviour under load. |
Kernel is weakest on adopt at 71/100. A sales call in the signup path stops an unattended run dead. If that is the part your agent depends on, take the ranking above seriously; if it is not, Kernel may still be the right pick.
What an agent runs into with Kernel
These are the findings from the last audit on 2026-09-01. Each one is a place unattended software stops, which is the practical reason to look at the list above.
- Add a copyable quickstart so first success is fast.
- Support an Idempotency-Key so retries are safe.
What this category actually supports
Across the 11 products scored in Browser Automation, automate a browser is offered by 100%, capture a screenshot is offered by 27%, fill a web form is offered by 0%. Anything under half is a gap you should expect to fill yourself whichever one you pick.
An agent can get this list directly: resolve("alternative to Kernel") over the MCP server, or GET /v1/categories/browser-automation.