Koyeb vs Vast.ai

Koyeb

H100 at $2.50 and H200 at $3.00 an hour, billed per second. Changelog silent since 27 February 2026 and no CLI release since 12 May 2026.

Vast.ai

API keys can be limited by permission category and by resource ID, the REST API has a public OpenAPI 3.1 file, and the CLI ships weekly with a skill file for coding agents. Machines belong to independent hosts, prices move with the market, rate-limit thresholds are unpublished, and there is no SLA or free tier.

Koyeb

1. Pass dry_run on service create or update to validate the definition before anything deploys
2. Page service lists with limit and offset and filter by statuses instead of fetching everything
3. Expect the first request after deep sleep to take 1 to 5 seconds and retry once with a timeout
4. Set --min-scale 0 on GPU services so idle instances stop billing
5. Re-check the Mistral transition before building anything long-lived on it

Vast.ai

1. Create a scoped key with vastai create api-key --permissions for the agent. A default key has full account access, billing and key management included
2. Pass --raw on every CLI command for JSON output, and -y on vastai destroy instance, which otherwise waits for a confirmation prompt
3. Register an SSH key with vastai create ssh-key before creating an instance, or the host is unreachable
4. Destroy instances when finished. A stopped instance still bills storage, and a zero balance without a saved card leads to deletion
5. Back off on HTTP 429 yourself when calling REST directly. The CLI retries 429 three times from 0.15 seconds
6. Filter searches with verified=true or the Secure Cloud option for sensitive data, and set a dph_total price cap