Sandbox as a Service

Free allowance: $5 of signup credit, which the page estimates at about 56 hours of a small sandbox; small is 2 vCPU, 4 GB and 40 GB at $0.09 an hour
Verdict: caveatusable, with a named limit or an unprobed read path
Cost: free tier
Identity: emailno card, no phone
Binding limit: request-rate$0.09 an hour for small, $0.28 for medium and $0.55 for large; 20 concurrent sandboxes per account; going over returns 429 until one is destroyed
Evidence: documented5 sources; a first-party page was read and the sentence quoted
Freshness: stale on 2026-12-05checked 2026-11-04 (live); stale on 2026-12-05

Free tier	$5 of signup credit, which the page estimates at about 56 hours of a small sandbox; small is 2 vCPU, 4 GB and 40 GB at $0.09 an hour unit mixed; metered on wall-clock
Price	none stated
Limits	request-rate (binding) $0.09 an hour for small, $0.28 for medium and $0.55 for large source request-rate (binding) 20 concurrent sandboxes per account; going over returns 429 until one is destroyed source retention-clamped a sandbox has a 1,440-minute maximum lifetime source not stated
Identity	email No card is required to sign up; the quickstart signs in with Google and creates an API key. The kind email is inferred from the Google sign-in.
Egress	not stated
Per-object cap	not stated
Retention	not stated
Interface	rest REST API at sandbox-as-a-service.com/v1 with bearer API keys, plus an MCP server; no SDK, CLI or SSH documented
Reliability	no reliability event recorded
Evidence note	documented the pricing page was read on 2026-10-22 and states the credit, the ladder, the concurrency cap and the 1,440-minute lifetime. That lifetime is the wall-clock axis, stated by the vendor in the units it is enforced in
Parsed numbers	has-free-tier 1

Evidence 5

date	source	what it proved
2026-10-02	sandbox-as-a-service.com/pricing	not published
2026-10-22	sandbox-as-a-service.com/pricing	'Prepaid credit, charged for exactly as long as a sandbox runs - no minimum, no rounding up, and provisioning time is not billed. No subscription, no seats, no minimum spend. An account with no running sandboxes costs nothing.' with the ladder 'small 2 vCPU 4 GB 40 GB $0.09/hour', 'A 10-minute small sandbox: about $0.015. The $5 of credit you get on signup covers roughly 56 hours', '20 concurrent sandboxes' and '1440 minutes maximum lifetime', quoted
2026-11-03	sandbox-as-a-service.com/	the service is reached by REST and an MCP server
2026-11-03	sandbox-as-a-service.com/pricing	signup needs no card
2026-11-03	sandbox-as-a-service.com/pricing	the pricing page lists hourly sandbox prices only; no egress allowance or egress price

More fields 8

keep rate	1.0
billing model	unclassified
shape	`{"vcpu": 2,"ram": 4,"disk": 40,"gpu_class": null,"gpu_count": null,"note": "small; medium is 4 vCPU, 8 GB and 80 GB, large is 8 vCPU, 16 GB and 160 GB"}`
session cap	`{"wall_clock_min": 1440,"idle_reap_s": null,"restart_required": false,"note": "1,440 minutes maximum lifetime per sandbox, and an account with no running sandboxes costs nothing"}`
free tier kind	one-time-credit
granularity	`{"min_billed_s": 0,"rounding_s": null}`
burst x	1.0
ps	`{"gib": 40,"price": "included in the sandbox size","durability": "sandbox disk","on_stop": true,"on_destroy": false,"retention": "the 1,440-minute lifetime"}`

Unknown values 9