{"rid":"compute/simplesandbox","card":{"rid":"compute/simplesandbox","eid":"simplesandbox","topic":"compute","slug":"simplesandbox","provider":"SimpleSandbox","url":"https://www.simplesandbox.dev/","domain":"simplesandbox.dev","category":"container sandbox / code execution API","tier":"Free","verdict":"qualifies-with-caveat","vorder":1,"grp":"usable","confidence":"documented","binding":"volume-quota","identity_kind":"email","identity_basis":"stated","needs_card":0,"needs_phone":0,"needs_id":0,"needs_institution":0,"country":null,"crypto":null,"interfaces":"rest,cli","egress_metered":null,"per_object_bytes":null,"retention_days":null,"verified_at":"2026-10-24T01:54:08.000Z","verified_basis":"live","checked_on":"2026-10-25","stale_on":"2026-11-24","n_evidence":3,"usd_month":null,"usd_per_tb_month":null,"summary":"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-h...","duplicate_of":null,"n_unknown":1},"record":{"topic":"compute","slug":"simplesandbox","provider":"SimpleSandbox","url":"https://www.simplesandbox.dev/","category":"container sandbox / code execution API","tier":"Free","free_tier":{"stated":"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","source_url":"https://www.simplesandbox.dev/","read_on":"2026-10-24","notes":"a monthly credit allowance equal to USD 1 of CPU time"},"per_object_cap":{"stated":"not applicable: the unit is a sandbox, not an object; no memory or disk allocation is published per sandbox"},"retention":{"stated":"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volumes are 1-100 GB, one per sandbox, single attachment, 'currently free only during beta' with future pricing unpublished.","days":null,"source_url":"https://docs.simplesandbox.dev/persistence"},"egress":{"terms":"Not published on the homepage: no traffic allowance and no per-GB rate are stated, and the product is sold as CPU credits only.","metered":false,"free_allowance":null,"price_per_tb":null,"source_url":"https://www.simplesandbox.dev/"},"interface":["rest","cli"],"interface_detail":"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.","chaining":"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.","limits":[{"kind":"volume-quota","value":"1M credits a month on the free tier (USD 1 of usage); 10M on the USD 10 plan; 50M on the USD 50 plan","source":"https://www.simplesandbox.dev/"},{"kind":"request-rate","value":"3 concurrent sandboxes on free, 10 on the USD 10 plan, 1,000+ on Pro","source":"https://www.simplesandbox.dev/"}],"limits_note":"'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","binding_note":"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.","identity_cost":{"kind":"email","detail":"'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.","country":null},"reliability_note":"No reliability event observed the platform is a thin layer over Fly.io Machines, so its availability follows a third party's.","confidence":"documented","confidence_note":"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.","evidence":[{"url":"https://www.simplesandbox.dev/","date":"2026-10-24","proved":"quoted: 'Start free, upgrade to $10/mo (10 concurrent) or $50/mo (1,000+ concurrent)' and 'Per-second billing at $0.0252/vCPU-hour'"},{"url":"https://www.simplesandbox.dev/","date":"2026-10-24","proved":"free tier: 'Free $0 - 1M credits/month - No credit card required' and '1M credits = $1. Pay only for what you use, billed per-second'"},{"url":"https://www.simplesandbox.dev/","date":"2026-10-24","proved":"quoted: '~1s cold start', 'No duration limits', '1,000+ concurrent sandboxes'"}],"verdict":"qualifies-with-caveat","verified_at":"2026-10-24T01:54:08.000Z","price_per_tb_month":null,"notes":"Arithmetic from the published CPU rate alone: 1 vCPU × 730 h × USD 0.0252 = USD 18.396 a month of CPU time, before any memory charge, which the page does not publish. That number is deliberately not promoted to m24h_usd because a record cannot claim a 24/7 total from one of two meters. The free allowance is USD 1, which is 39.7 vCPU-hours. Region and egress are unverified.","extras":{"shape":{"vcpu":null,"ram_gib":null,"disk_gib":null,"gpu_class":null,"gpu_count":null},"billing_model":"hourly","term":"monthly credit plans plus per-second metering","m10h_usd":null,"m24h_usd":null,"price_arithmetic":"CPU only: USD 0.0252/vCPU-hour × 730 h = USD 18.396 a month for 1 vCPU of CPU time. The memory meter is not published, so no complete 24/7 total is computed or claimed.","free_tier_kind":"credit","network_out":{"allow_outbound":true,"allow_inbound_listen":null,"ports":"not published","static_ip":null,"ipv6":null,"per_session_bytes":null},"session_cap":{"wall_clock_min":null,"idle_reap_s":null,"restart_required":false,"note":"'No duration limits' advertised"},"aggregator_gross_usd_month":null,"aggregator_note":"sandboxprices.com carries SimpleSandbox in the picker with no modelled total; its note says the complete CPU/RAM shape tariff is unresolved, which matches what the vendor homepage shows today."}},"claims":[{"path":"$.free_tier.stated","kind":"free-quota","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[0].value","kind":"limit:volume-quota","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[1].value","kind":"limit:request-rate","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"}],"unknown":[["$.egress.metered","egress-unknown"]],"history":[],"drift":[]}