Tenki Sandbox
- Free allowance
- USD 100 in free credits on a new account: USD 50 at signup and USD 50 the first time a payment method is added.
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tierpaid plans from USD 48.62/month
- Identity
- cardcard required, no phone
- Binding limit
- volume-quotaStarter machines cap at 4 cores / 8 GB; 5 GiB of sandbox disk free
- Evidence
- documented10 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 | USD 100 in free credits on a new account: USD 50 at signup and USD 50 the first time a payment method is added. Starter itself is a free plan. unit mixed; metered on wall-clock; credit |
|---|---|
| Price | none stated |
| Limits |
A sticky session has no duration cap, which is unusual: 'A sticky session runs until you terminate it.' |
| Binding | volume-quota The hourly rate is the wall: USD 0.0504 per vCPU-hour is 45x Krova's per-vCPU rate, so a month of 24/7 costs what a year of Krova costs. |
| Identity | card USD 50 of the USD 100 credit is released only when a payment method is added; top-up minimum USD 20. Card type and hold are not stated. |
| Egress | not published: the pricing page's sandbox rate table lists vCPU, memory and disk only, with no transfer allowance or per-GB price; the docs index puts its egress page under Runners, not Sandbox free allowance: not stated |
| Per-object cap | Starter caps a machine at 4 cores / 8 GB with 5 concurrent sessions; Team (USD 250/month, or USD 200 billed yearly) raises it to 16 cores / 64 GB and 100 sessions |
| Retention | A paused sandbox stops charging and keeps its files and memory; first 5 GiB of disk is free, storage beyond it is metered. |
| Interface | cli, ssh tenki CLI, TypeScript, Python and Go SDKs, and SSH into a session with authorized keys; no REST reference read |
| Tooling | not stated |
| Reliability | Usage is metered by the second with no minimums; when the balance runs out Tenki stops starting new jobs and sessions until a top-up or auto-reload. |
| Notes | Arithmetic: 0.000014 x 3600 = USD 0.0504/vCPU-hour and 0.0000045 x 3600 = USD 0.0162/GiB-hour; 1 vCPU + 1 GiB = USD 0.0666/hour, x 730 = USD 48.62. At a 2 vCPU / 4 GiB shape the same rate gives (2 x 0.0504 + 4 x 0.0162) x 730 = USD 120.89 a month. Modelled at 200 hours a month instead of 730, the same shape would be USD 13.32. |
| Evidence note | documented All four sandbox rates, the credit split, the plan ceilings and the per-second metering are quoted from the vendor's pricing page read. |
| Parsed numbers |
|
Evidence 10
| date | source | what it proved |
|---|---|---|
| 2026-10-02 | tenki.cloud/pricing | not published |
| 2026-10-22 | tenki.cloud/pricing | 'Every plan includes free credits and limits. Go beyond them and you only pay for what you run.' with '\+ Usage beyond free credits', '$100 one-time credit', 'Up to 5 concurrent sessions' and '$100 monthly credits' on the paid tier, quoted |
| 2026-10-24 | tenki.cloud/pricing | quoted: '$100 one-time credit', 'Up to 5 concurrent sessions', 'Up to 4 cores and 8 GB RAM', and from the FAQ: 'New accounts get $100 in free credits: $50 when you sign up, applied to your first workspace, and $50 the first time you add a payment method.' |
| 2026-10-24 | tenki.cloud/pricing | quoted rate table: 'Sandbox vCPU $0.000014 per second', 'Sandbox Memory $0.0000045 per GiB/second', 'Sandbox Disk $0.00000003 per GiB/second Free 5 GiB'. |
| 2026-10-24 | tenki.cloud/docs/sandbox/sessions.md | quoted: 'A sticky session runs until you terminate it.'; 'Unset options fall back to service defaults of 2 vCPU, 4096 MB, and a 5 GiB root disk.'; 'Pause and resume preserve the VM's memory and durable filesystem state'. |
| 2026-10-24 | tenki.cloud/pricing | quoted: 'Sandbox vCPU | $0.000014per second'; 'Sandbox Memory | $0.0000045per GiB/second'; 'Sandbox Disk | $0.00000003per GiB/second Free 5 GiB' |
| 2026-10-24 | tenki.cloud/pricing | quoted FAQ: 'New accounts get $100 in free credits: $50 when you sign up ... and $50 the first time you add a payment method' and 'Starter is free ... up to 5 concurrent sessions and machines up to 4 cores / 8 GB' |
| 2026-11-03 | tenki.cloud/pricing | the sandbox rate table lists vCPU, memory and disk and no transfer line |
| 2026-11-03 | tenki.cloud/llms.txt | a CLI with SSH support exists |
| 2026-11-03 | tenki.cloud/docs/sandbox/sessions.md | SSH keys are set at session creation in the SDKs and CLI |
More fields 18
| keep rate | 1.0 |
|---|---|
| billing model | per-second |
| shape | {"vcpu": 1,"ram_gib": 1,"disk_gib": 5,"gpu_class": null,"gpu_count": null} |
| session cap | {"wall_clock_min": null,"idle_reap_s": null,"restart_required": false,"note": "no wall-clock cap stated; pausing stops the meter"} |
| network out | {"allow_outbound": true,"allow_inbound_listen": null,"ports": "not stated on the pricing page","static_ip": null,"ipv6": null,"per_session_bytes": null} |
| free tier kind | credit |
| granularity | {"min_billed_s": 0,"rounding_s": null} |
| burst x | 1.0 |
| shape max | {"vcpu": 4,"ram_gib": 8,"disk_gib": 100} |
| term | monthly plan plus usage |
| m10h usd | 19.98 |
| m24h usd | 48.62 |
| price arithmetic | (0.0504 + 0.0162) = USD 0.0666/hour x 730 h = USD 48.62; x 300 h (10 h/day) = USD 19.98. Disk beyond the free 5 GiB adds 0.000108/GiB-hour. |
| credit usd | 50 |
| credit usd with card | 100 |
| credit months at shape | 0.41 |
| credit hours at shape | 302 |
| credit expiry | not stated for free credits; purchased credits never expire |
Unknown values 3
- chaining: a source was read and is silent on this field
- egress metered: egress metering was not published
- tooling: a source was read and is silent on this field