SimpleSandbox
simplesandbox.dev · Compute · 1 record · JSON
SimpleSandbox Compute
caveatemailno cardDvolume-quota
| Free tier | Free $0: 1M credits a month, 3 concurrent sandboxes, no credit card required. 1M credits = USD 1, and the meter is billed per second at USD 0.0252 per vCPU-hour. unit mixed; metered on wall-clock; a monthly credit allowance equal to USD 1 of CPU time |
|---|---|
| Price | none stated |
| Per-object cap | not applicable: the unit is a sandbox, not an object; no memory or disk allocation is published per sandbox |
| Retention | The sandbox advertises 'No duration limits'. Persistent volumes are 1-100 GB, one per sandbox, single attachment, 'currently free only during beta' with future pricing unpublished. |
| Egress | Not published on the homepage: no traffic allowance and no per-GB rate are stated, and the product is sold as CPU credits only. |
| Identity | email 'No credit card required' on the Free plan, with a free API key issued at app.simplesandbox.dev. Card types for paid plans and any authorisation hold are not stated on the page read. |
| Limits |
'No duration limits' and '~1s cold start' are the advertised shape. Auto top-up adds 1M credits (USD 1) when the balance runs low, which quietly converts a free tier into a paid one. |
| Binding | volume-quota USD 1 of CPU credit is spent in about 39 vCPU-hours at the published rate, so an always-on 1 vCPU sandbox exhausts the free month in under two days. |
| Interface | rest, cli TypeScript/Node SDK ('import { Sandbox } from '@simplesandbox/sdk')') and a REST API, with a free API key issued from the app. |
| Tooling | The vendor SDK; the sandboxes run on Fly.io infrastructure under the vendor's own isolation. |
| Composes with | A genuinely free, no-card code-execution endpoint with a USD 1 monthly credit is useful as a fallback executor but not as a machine: 1M credits buys about 39 vCPU-hours of CPU time and the memory meter is not published, so it cannot be sized as an always-on box. |
| Reliability | No reliability event observed the platform is a thin layer over Fly.io Machines, so its availability follows a third party's. |
| Notes | Arithmetic from the published CPU rate alone: 1 vCPU × 730 h × USD 0.0252 = USD 18.396 a month of CPU time, before any memory charge, which the page does not publish. That number is deliberately not promoted to m24h_usd because a record cannot claim a 24/7 total from one of two meters. The free allowance is USD 1, which is 39.7 vCPU-hours. Region and egress are unverified. |
| Evidence rung | documented The credit price, the CPU rate, the plan prices, the concurrency caps and the no-card claim are quoted from the vendor's homepage read today. The memory meter and the disk rate are not published, so no 24/7 total for a shape is recorded: the vCPU figure alone would understate the bill. What would raise it: the docs' billing page, or an account that reads the meter. |
| Checked | 2026-10-25 (live); stale on 2026-11-24 |
Evidence (3)
| date | source | what it proved |
|---|---|---|
| 2026-10-24 | www.simplesandbox.dev/ | quoted: 'Start free, upgrade to $10/mo (10 concurrent) or $50/mo (1,000+ concurrent)' and 'Per-second billing at $0.0252/vCPU-hour' |
| 2026-10-24 | www.simplesandbox.dev/ | free tier: 'Free $0 - 1M credits/month - No credit card required' and '1M credits = $1. Pay only for what you use, billed per-second' |
| 2026-10-24 | www.simplesandbox.dev/ | quoted: '~1s cold start', 'No duration limits', '1,000+ concurrent sandboxes' |
More fields (11)
{
"shape": {
"vcpu": null,
"ram_gib": null,
"disk_gib": null,
"gpu_class": null,
"gpu_count": null
},
"billing_model": "hourly",
"term": "monthly credit plans plus per-second metering",
"m10h_usd": null,
"m24h_usd": null,
"price_arithmetic": "CPU only: USD 0.0252/vCPU-hour × 730 h = USD 18.396 a month for 1 vCPU of CPU time. The memory meter is not published, so no complete 24/7 total is computed or claimed.",
"free_tier_kind": "credit",
"network_out": {
"allow_outbound": true,
"allow_inbound_listen": null,
"ports": "not published",
"static_ip": null,
"ipv6": null,
"per_session_bytes": null
},
"session_cap": {
"wall_clock_min": null,
"idle_reap_s": null,
"restart_required": false,
"note": "'No duration limits' advertised"
},
"aggregator_gross_usd_month": null,
"aggregator_note": "sandboxprices.com carries SimpleSandbox in the picker with no modelled total; its note says the complete CPU/RAM shape tariff is unresolved, which matches what the vendor homepage shows today."
}Unknown or withheld values (1)
$.egress.meteredegress-unknown