Blaxel vs Sendblue Sandboxes

Blaxel bills memory only, at $0.0414 per GiB-hour. Sendblue Sandboxes costs $0.165 per vCPU-hour. Blaxel runs microVMs and has no session limit. Sendblue Sandboxes runs containers.

Updated Oct 15, 2026

Blaxel

Sandboxes that pause when idle and resume with state.

Isolation: MicroVM
Free tier: Credit of up to $200
Max session: No limit

Visit site Blaxel profile

Sendblue Sandboxes

Isolated cloud Linux machines that AI agents control over an HTTP API.

Isolation: Container
Free tier: $100 free compute, once per phone number
Max session: Not listed

Visit site Sendblue Sandboxes profile

What is different

6 fields differ. The rest are the same or not listed.

Field

Blaxel

Sendblue Sandboxes

vCPU, per hour: Blaxel: Included; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Blaxel: $0.0414; Sendblue Sandboxes: Included
Free tier: Blaxel: Credit of up to $200; Sendblue Sandboxes: $100 free compute, once per phone number
Billing: Blaxel: Memory only; Sendblue Sandboxes: Bundled machine time
Isolation: Blaxel: MicroVM; Sendblue Sandboxes: Container
Pause and resume: Blaxel:; Sendblue Sandboxes: No

Full comparison

18 fields, at each provider's list price

Blaxelblaxel.ai/pricing

Sendblue Sandboxessendblue.com/sandboxessendblue.com

Pricing

vCPU, per hour: Blaxel: Included; Sendblue Sandboxes: $0.165
RAM, per GiB-hour: Blaxel: $0.0414; Sendblue Sandboxes: Included
Storage: Blaxel: Snapshots $0.20 per GB per month. Volumes $0.12 per GB per month.; Sendblue Sandboxes: Not listed
Free tier: Blaxel: Credit of up to $200; Sendblue Sandboxes: $100 free compute, once per phone number
Paid plan from: Blaxel: Pay as you go; Sendblue Sandboxes: Not listed
Billing: Blaxel: Memory only; Sendblue Sandboxes: Bundled machine time

Limits

Max session: Blaxel: No limit; Sendblue Sandboxes: Not listed
Idle stop: Blaxel: Not listed; Sendblue Sandboxes: After 10 minutes
Largest sandbox: Blaxel: Not listed; Sendblue Sandboxes: 2 vCPU · 8 GiB
Concurrent sandboxes: Blaxel: Not listed; Sendblue Sandboxes: Up to 5

Platform

Isolation: Blaxel: MicroVM; Sendblue Sandboxes: Container
GPU: Blaxel: Not listed; Sendblue Sandboxes: Not listed
Snapshots: Blaxel:; Sendblue Sandboxes: Not listed
Pause and resume: Blaxel:; Sendblue Sandboxes: No

Developer

SDKs: Blaxel: Python, TypeScript, Go; Sendblue Sandboxes: Not listed
Integrations: Blaxel: OpenAI Agents SDK, Claude Agent SDK, MCP, Claude Code, LangChain, Vercel AI SDK; Sendblue Sandboxes: Not listed

Trust

License: Blaxel: Not listed; Sendblue Sandboxes: Not listed
BYOC: Blaxel: Bring-your-own-metal in your VPC, on request; Sendblue Sandboxes: Not listed

Hourly cost

One sandbox running for one hour

Size

Blaxel

Sendblue Sandboxes

1 vCPU · 2 GiB: Blaxel: $0.083; Sendblue Sandboxes: $0.165
2 vCPU · 4 GiB: Blaxel: $0.166; Sendblue Sandboxes: $0.330
4 vCPU · 8 GiB: Blaxel: $0.331; Sendblue Sandboxes: $0.660

Compute only, at list rates.

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Which one fits

Based on the fields above

Blaxel fits when

You want each sandbox in its own microVM.
You use the OpenAI Agents SDK, the Claude Agent SDK, MCP, Claude Code, LangChain or the Vercel AI SDK.
You want the lower list price: $0.166 against $0.330 an hour for 2 vCPU and 4 GiB.
You want the larger free credit: $200 against $100.

More comparisons

See all comparisons

Blaxel

Sendblue Sandboxes

What is different

Full comparison

Pricing

Limits

Platform

Developer

Trust

Hourly cost

Which one fits

Blaxel fits when

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