# Prepaid agent sandboxes: prices at 2 vCPU / 4 GB (Nov 2026)

You buy credit up front, then use it. 6 providers: one busy 1-hour session at 2 vCPU / 4 GB costs ≥ $0.03 (Celesto) to ≥ $0.2 (Tensorlake).

1 h busy: all CPU billed. 1 h at 10% CPU: lower only where idle CPU isn't billed. Fleet month: 50 × 8 h × 22 days, busy, on the lowest plan that runs 50 at once (its fee, less the usage it includes). At once and Starts are on the terms priced. Fixed sizes use the smallest size that fits. "≥" means a billing term is not published. Method: https://roost.guide/methodology/

| # | Provider | 1 h busy | 1 h at 10% CPU | Fleet month | Pay | At once | Starts | Size priced | Billed on | Caveats |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Celesto | ≥ $0.03 [1] | ≥ $0.03 | not on published plans | Prepaid credit | 10 | ? | Standard (2 vCPU / 4 GB) | Flat price per size | none |
| 2 | Together Sandbox | ≥ $0.149 [2] | ≥ $0.149 | ≥ $1,309 | Prepaid credit | ? | ? | 2 vCPU / 4 GB | unknown | none |
| 3 | boxd | $0.15 [3] | $0.0654 | $1,320 | Prepaid credit | ? | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |
| 4 | Blaxel | ≥ $0.166 [4] | ≥ $0.166 | not on published plans | Prepaid credit | 10 | ? | 2 vCPU / 4 GB | Running time | none |
| 5 | Tenki | $0.166 [5] | $0.166 | $1,607 (on Team) | Prepaid credit | 5 | ? | 2 vCPU / 4 GB | Running time | none |
| 6 | Tensorlake | ≥ $0.2 [6] | ≥ $0.074 | ≥ $1,760 | Prepaid credit | 100 | ? | 2 vCPU / 4 GB | Active CPU | Active-CPU billing |

## Listed but not ranked

- Morph Cloud: No size fits [7]

## Other pages

- [2 vCPU / 4 GB](https://roost.guide/agent-sandboxes/)
- [4 vCPU / 8 GB](https://roost.guide/agent-sandboxes/4-vcpu-8-gb/)
- [8 vCPU / 16 GB](https://roost.guide/agent-sandboxes/8-vcpu-16-gb/)
- [Devboxes](https://roost.guide/devboxes/)

## Filters

- [All](https://roost.guide/agent-sandboxes/)
- [Pay as you go](https://roost.guide/agent-sandboxes/pay-as-you-go/)
- [Monthly plan](https://roost.guide/agent-sandboxes/subscription/)
- [Free tier](https://roost.guide/agent-sandboxes/free-tier/)
- [100+ at once](https://roost.guide/agent-sandboxes/high-concurrency/)
- [Start limits published](https://roost.guide/agent-sandboxes/published-start-limits/)
- [No session limit](https://roost.guide/agent-sandboxes/no-session-limit/)
- [Active-CPU billing](https://roost.guide/agent-sandboxes/active-cpu-billing/)
- [GPU](https://roost.guide/agent-sandboxes/gpu/)
- [Desktop](https://roost.guide/agent-sandboxes/desktop/)
- [Docker inside](https://roost.guide/agent-sandboxes/docker/)
- [SSH](https://roost.guide/agent-sandboxes/ssh/)
- [Snapshots](https://roost.guide/agent-sandboxes/snapshots/)
- [Fork](https://roost.guide/agent-sandboxes/fork/)
- [MicroVM](https://roost.guide/agent-sandboxes/microvm/)
- [Self-host](https://roost.guide/agent-sandboxes/self-hosted/)
- [Your cloud](https://roost.guide/agent-sandboxes/byoc/)
- [SOC 2](https://roost.guide/agent-sandboxes/soc2/)
- [Europe](https://roost.guide/agent-sandboxes/europe/)

## Sources

[1] https://celesto.ai/pricing (checked 31 Oct 2026)
[2] https://www.together.ai/pricing (checked 31 Oct 2026)
[3] https://boxd.sh/pricing/ (checked 1 Nov 2026)
[4] https://blaxel.ai/pricing (checked 31 Oct 2026)
[5] https://tenki.cloud/pricing (checked 1 Nov 2026)
[6] https://www.tensorlake.ai/pricing (checked 31 Oct 2026)
[7] https://cloud.morph.so/web/pricing (checked 31 Oct 2026)