Cloudflare Sandbox SDK / Containers
Cloudflare's Sandbox SDK starts container instances, each a microVM with its own kernel and network, controlled from a Worker. For teams already building on Cloudflare Workers.
- 2 vCPU + 4 GiB
- $0.180/hr 1.09x E2B
- Isolation
- microVM
- Pause / resume
- Not published
- Max session
- not published
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Priced next to Cloudflare Sandbox SDK / Containers
All providers against E2B| Provider | 2 vCPU + 4 GiB$/hr | vs E2B | Relative cost | Isolation |
|---|---|---|---|---|
| E2B | $0.166 (source: E2B Pricing) | base | Firecracker microVM | |
| Hopx | $0.166 (source: Hopx Pricing) | 1.00x | Firecracker microVM | |
| Cloudflare Sandbox SDK / Containers | $0.180 (source: Cloudflare Containers pricing) | 1.09x | microVM | |
| Tensorlake Sandboxes | $0.200 (source: Tensorlake Pricing) | 1.21x | Firecracker microVM | |
| Upstash Box | $0.200 (source: Upstash Box pricing) | 1.21x | container |
Every field
Source on each value- Isolation Isolation technology the vendor states for each sandbox.
- microVM (source: Sandboxes on Cloudflare)
- Other isolation options Alternative runtimes the vendor offers besides the default (e.g. VM runtime, gVisor for GPU).
- Dynamic Workers (isolates) for JS/Python/Wasm (source: Sandboxes on Cloudflare)
- Deployment Managed cloud service, self-hosted software, or both.
- managed (source: Sandboxes on Cloudflare)
- Billing basis What the meter counts: wall-clock allocated resources, active CPU only, requests/plan quota, session-hours, or free software.
- active CPU (source: Cloudflare Containers pricing)
- vCPU price $/vCPU-hr Published on-demand CPU rate normalised to USD per vCPU-hour (per-second rates multiplied by 3,600; per-core rates divided by vCPUs per core where the vendor defines it). Lowest public tier, default region.
- $0.072 (source: Cloudflare Containers pricing)
- Memory price $/GiB-hr Published memory rate normalised to USD per GiB-hour (GB treated as GiB where the vendor does not distinguish). 0 means the vendor states memory is free.
- $0.009 (source: Cloudflare Containers pricing)
- Sandbox from $/sandbox-hr Smallest published per-sandbox hourly price, where the vendor publishes one.
- Not published
- Paid plan from $/mo Cheapest paid platform plan fee (before usage).
- $5.00 (source: Cloudflare Containers pricing)
- Free tier A free plan, free monthly allowance or sign-up credit exists.
- No (source: Sandboxes on Cloudflare)
- Free tier detail What the free tier or credit includes, as published.
- Workers Paid ($5/mo) includes 375 vCPU-minutes, 25 GiB-hours memory and 200 GB-hours disk per month. (source: Sandboxes on Cloudflare)
- Cold start ms Vendor-published create/boot time in milliseconds. Only filled when the vendor publishes a number; see startup_claim for context (percentile, conditions).
- Not published
- Resume time ms Vendor-published resume-from-pause/standby/snapshot time in milliseconds.
- Not published
- Startup claim The vendor's startup/resume wording with conditions, quoted or closely paraphrased.
- Not published
- Max session length Longest single sandbox session by plan, as published.
- Not published
- Persistence / snapshots Filesystem state can be kept between runs (snapshots, persistent disks, volumes).
- Yes (source: Sandboxes on Cloudflare)
- Pause / resume A sandbox can be paused, suspended, hibernated or put in standby and resumed later.
- Not published
- Memory state kept Pause/hibernate preserves running memory state, not only the filesystem.
- Not published
- Fork / branch A running or snapshotted sandbox can be cloned into new sandboxes.
- Not published
- GPU GPU sandboxes are offered.
- Not published
- Self-host Can run on your own hardware or cluster (open source or licensed).
- Not published
- BYOC / VPC Vendor-managed deployment inside your own cloud account.
- Not published
- Open source Core sandbox runtime is published under an open-source licence.
- Not published
- Licence Open-source licence of the runtime, if any.
- Not published
- SDKs / languages Official SDK languages (or supported execution languages where noted).
- TypeScript (@cloudflare/sandbox); any language inside the container (source: Sandboxes on Cloudflare)
- Regions Published regions or region count.
- Not published
- Max vCPU per sandbox vCPU Largest published vCPU count per sandbox on any self-serve or enterprise plan.
- 4 (source: Sandboxes on Cloudflare)
- Max memory per sandbox GiB Largest published memory per sandbox.
- 12 (source: Sandboxes on Cloudflare)
- Concurrency Published concurrent sandbox limits by plan.
- Not published
- SOC 2 SOC 2 status as stated by the vendor.
- Type II (source: Cloudflare Trust Hub)
- HIPAA Vendor offers HIPAA-compliant usage/BAA (on any plan).
- Not published
- Pricing from
- $0.072 per vCPU-hour
- Pricing as published
- $0.000020/vCPU-s on active CPU; $0.0000025/GiB-s memory and $0.00000007/GB-s disk on the provisioned instance, beyond Workers Paid allowances; requires Workers Paid ($5/mo). Largest instance standard-4 (4 vCPU, 12 GiB). Pricing checked 2026-11-09.
Sources
- Sandboxes on Cloudflare accessed 2026-11-09
- Cloudflare Containers pricing accessed 2026-11-09
- Cloudflare Trust Hub accessed 2026-11-09
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