Ably alternatives
The highest-scoring alternative to Ably is Kernel at 89/100 on the AgentReady, against 60/100 for Ably.
All scored in Observability & Error Tracking.
| Score | Alternative | Compare |
|---|---|---|
| 89 | Kernel | - |
| 77 | Grafana Cloud | - |
| 68 | Comet | - |
| 64 | Speakeasy | - |
| 63 | Wandb | - |
| 62 | Sentry | - |
| 62 | ZeroBounce | - |
| 61 | WorkOS | - |
| 59 | Patronus | - |
| 58 | Dash0 | - |
| 57 | Galileo | - |
| 57 | Laminar | - |
| 57 | Langfuse | - |
| 56 | Confident Ai | - |
| 56 | Unkey | - |
| 55 | Treblle | - |
| 54 | Honeycomb | - |
| 52 | Better Stack | - |
| 52 | SigNoz | - |
| 51 | New Relic | - |
| 51 | Statsig | - |
| 50 | Openobserve | - |
| 48 | Datadog | - |
| 48 | Flowise | - |
| 48 | Last9 | - |
| 46 | Highlight | - |
| 44 | GitGuardian | - |
| 43 | Hyperdx | - |
What Kernel does that Ably does not
Kernel passes llms-full.txt / full agent docs, mcp discoverable, structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, mcp integration available, machine-readable errors, retry behavior documented, rate-limit behavior predictable, agent compatibility verified, and Ably 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
Ably fails llms-full.txt / full agent docs, mcp discoverable, structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, mcp integration available, machine-readable errors, retry behavior documented, rate-limit behavior predictable, agent compatibility verified. Each one is a place an unattended run stops, which is usually what sends someone looking in the first place.
Where Ably loses the points
| Pillar | Ably | What it measures |
|---|---|---|
| Discover | 80 | Can an agent find it at all: sitemap, robots, structured data. |
| Understand | 31 | Is there a spec, an llms.txt, a machine-readable description. |
| Adopt | 75 | Signup, keys, SDKs, and whether a human has to be involved. |
| Operate | 53 | Rate-limit headers, errors, status, and behaviour under load. |
Ably is weakest on understand at 31/100. Without a spec an agent has to guess at endpoints, and it guesses wrong. If that is the part your agent depends on, take the ranking above seriously; if it is not, Ably may still be the right pick.
What an agent runs into with Ably
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.
- Ship an MCP server so agents can call you as a tool.
- Publish MCP install instructions so agents can discover the server.
- Publish an OpenAPI spec so agents can generate a client.
- Flesh out the OpenAPI: paths, schemas, and descriptions.
- Document error responses as an enum in your OpenAPI.
- Let agents create API keys programmatically.
- Return X-RateLimit / Retry-After headers so agents pace themselves.
- Publish an AGENTS.md or llms-full.txt with full agent context.
What this category actually supports
Across the 29 products scored in Observability & Error Tracking, trace requests is offered by 45%, collect metrics / apm is offered by 41%, monitor uptime is offered by 21%, capture errors is offered by 14%. 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 Ably") over the MCP server, or GET /v1/categories/observability.