CrabTalk vs Koyeb.
Application services + autoscaling
Koyeb runs applications from source or container images with configurable instances and autoscaling. CrabTalk runs Rust/Wasm tool services with small per-call reservations and service-owned SQLite.
Which fits your work?
CrabTalk
- Small tool operations with independent resource budgets
- A shared SQL service called by several agents
- Deployable copies with separate credentials and state
Koyeb
- Existing web frameworks and container dependencies
- Instance sizing and application autoscaling
- Compute-heavy work beyond small tool budgets
Use both.
Keep the application on Koyeb and call a CrabTalk tool over HTTP for an independently reusable operation. Existing application data can remain in its current database.
Capabilities side by side.
| Capability | CrabTalk | Koyeb |
|---|---|---|
| Runtime | Rust/Wasm tools using host APIs | Application code or prebuilt container images |
| Memory scope | 1–128 MiB reservation per tool call | Configured instance capacity shared by application requests |
| Input-specific sizing | Lower one call’s reservation in code | Choose instance size and scaling behavior |
| Persistent data | SQLite belongs to the service deployment | Managed/external databases; volumes have separate availability terms |
| Tool endpoint | Hosted MCP discovery and calling | Deploy your application’s HTTP or MCP server |
| Idle behavior | Execution resources metered for tool calls | Eligible services can scale instances to zero |
| Dependencies | Wasm-compatible code and declared host access | Application languages, processes and packages |
Host a supplier lookup used by several agents.
The lookup waits on an upstream API and saves review notes. Compare a small tool service with the application runtime and database you actually need.
CrabTalk
- Define or reuse the supplier lookup operation
- Add SQL review notes and per-tool budgets
- Deploy and grant agents access
Koyeb
- Package the existing application or tool server
- Connect durable storage and configure access
- Choose instance size and autoscaling settings
CrabTalk vs Koyeb pricing.
CrabTalk
Owners pay runs, CPU, reserved memory-time and rows. Smaller reservations reduce memory-time charges during upstream API waits.
Koyeb
Koyeb publishes per-second instance pricing, with plan-specific credits and additional database or storage costs. Scale-to-zero eligibility and idle settings affect runtime charges.
Estimate total instance runtime, replicas and persistent data at expected utilization. Koyeb is outside the calculator; shared instance capacity differs from a reservation on each call.
Limits that affect the choice.
- CrabTalk tool budgets stop at 100 ms CPU and 128 MiB memory. Heavy computation, GPU work and arbitrary server processes require another runtime.
- Koyeb’s volume documentation currently labels volumes public preview and suitable for testing. Check that status before choosing them for important production data.
- This page compares application services, not Koyeb’s separate sandbox product. Scale-to-zero behavior depends on service and instance configuration.
Questions about CrabTalk and Koyeb.
Can Koyeb scale down between bursts of requests?
Yes, eligible services support scale-to-zero and wake on new requests. Compare the applicable idle interval and any startup cost or delay for the workload.
Does Koyeb provide persistent storage?
It documents database options and volumes. The volume feature has public-preview restrictions, so choose storage based on the current durability and availability requirements.
Should an existing server be ported to CrabTalk?
Only if the operation fits the smaller runtime and budget model. Keeping its dependencies on Koyeb can be simpler while separate reusable tools run on CrabTalk.
Sources.
Checked .