> ## Documentation Index > Fetch the complete documentation index at: https://docs.tensorlake.ai/llms.txt > Use this file to discover all available pages before exploring further. # How much does Tensorlake cost and what are the limits? > Tensorlake pricing — free tier, On-Demand, Pro, and Enterprise plans, per-second sandbox billing, CPU and RAM rates, plan limits, and resource defaults. Common questions about Tensorlake's pricing model, plan tiers, and the resource limits that apply to sandboxes and image builds. For the live pricing page, see [tensorlake.ai/pricing](https://www.tensorlake.ai/pricing). ## How is sandbox-as-a-service pricing typically structured? Sandbox-as-a-service products are usually billed on usage rather than a flat seat fee. The common dimensions are: * **Compute time** — CPU-seconds or vCPU-hours while the sandbox is running. * **Memory-time** — GB-seconds or GB-hours of allocated memory. * **Storage** — disk for snapshots, suspended-state preservation, and persisted volumes. * **Network egress** — outbound bandwidth. * **Build minutes** — time spent building custom images, sometimes metered separately. Tensorlake Cloud uses **per-second sandbox billing** with separate CPU and RAM rates, plus per-GB-hour storage for suspended snapshots. ## Does Tensorlake have a free tier? Yes. The **Free tier is \$0 forever with no credit card required.** It includes: * 2 concurrent sandboxes * 1 core / 1 GB RAM / 10 GB disk per sandbox * Unmetered sessions * Self-serve docs and community Slack support * SOC 2 Type 2 compliance The Free tier's 1 core / 1 GB RAM / 10 GB disk allowance matches the [SDK defaults](#what-are-the-default-resources-for-a-tensorlake-sandbox), so most starter scripts will run unchanged. ## How much does a Tensorlake Sandbox cost? | | On-Demand | Pro | | -------------------- | -------------------- | -------------------------------- | | Base fee | \$0 | \$250 / month | | CPU | \$0.05 / hr per core | \$0.03 / hr per core *(40% off)* | | RAM | \$0.015 / hr per GB | 40% off metered usage | | Concurrent sandboxes | up to 100 | 1,000 | Sandbox runtime is **billed by the second**. One credit is worth \$0.01. Snapshots are billed **per GB-hour while suspended**. ## What are the Tensorlake plan tiers? | Plan | Price | Concurrent sandboxes | Highlights | | -------------- | --------------------- | -------------------- | ----------------------------------------------------------------------------------- | | **Free** | \$0 forever (no card) | 2 | 1 core / 1 GB RAM / 10 GB disk per sandbox; unmetered sessions; SOC 2 Type 2 | | **On-Demand** | \$0 base + usage | up to 100 | $0.05/hr per core, $0.015/hr per GB RAM; best-effort support | | **Pro** | \$250 / month + usage | 1,000 | \$0.03/hr per core (40% off); snapshot + resume; 24×7 Slack/email; 24h P1 SLA | | **Enterprise** | Custom quote | Unlimited | HIPAA + SOC 2 Type 2; SSO/SAML; RBAC; DPA; in-VPC / on-prem; 1h P1 SLA; resident SA | See [tensorlake.ai/pricing](https://www.tensorlake.ai/pricing) for current rates. ## Is sandbox billing per-second or per-hour in Tensorlake? **Per-second.** Rates are quoted per hour for clarity ($0.05/hr per core on On-Demand, $0.03/hr per core on Pro), but you only pay for the seconds the sandbox is running. This is why suspending a named sandbox between agent turns is meaningfully cheaper than leaving it running idle — see [suspend/resume](/sandboxes/lifecycle). ## Do I pay for a suspended Tensorlake Sandbox? A suspended sandbox **consumes no compute**, so CPU and RAM time are not billed while suspended. Snapshots are billed **per GB-hour** while suspended. ## What are the default resources for a Tensorlake Sandbox? By default, `Sandbox.create()` allocates: | Resource | Default | How to override | | --------- | -------------------- | ---------------------------------- | | CPUs | `1.0` | `cpus=` (SDK) or `--cpus` (CLI) | | Memory | `1024 MB` | `memory_mb=` / `--memory` | | Root disk | `10240 MiB` (10 GiB) | `disk_mb=` / `--disk_mb` | | Timeout | none | `timeout_secs=` / `--timeout-secs` | ## What are the memory and disk limits for a Tensorlake Sandbox? * **Memory:** between `1024` and `8192` MB per CPU core. * **Disk:** between `10240` and `102400` MiB (10–100 GiB). Disk size is **growth-only**: when creating a sandbox from an `image`, `disk_mb` can grow the root disk at create time. When restoring from a filesystem snapshot, `disk_mb` can grow the root disk at restore time. You cannot shrink the disk below the source. See the [SDK reference](/sandboxes/sdk-reference) and [Lifecycle: resources](/sandboxes/lifecycle) for the full parameter table. ## How many concurrent sandboxes can I run on each Tensorlake plan? | Plan | Concurrent sandboxes | | ---------- | -------------------- | | Free | 2 | | On-Demand | up to 100 | | Pro | 1,000 | | Enterprise | Unlimited | ## What is the default sandbox timeout in Tensorlake? The default `timeout_secs` is `600` (10 minutes). The maximum allowed value depends on your plan: | Plan | Max `timeout_secs` | | ------------------------- | -------------------------------------------------------------- | | Free (unverified) | 3600 (1 hour) | | Free (verified) | 7200 (2 hours) | | On-Demand (pay-as-you-go) | 86400 (24 hours) | | Pro / Enterprise | See [tensorlake.ai/pricing](https://www.tensorlake.ai/pricing) | Verify your free account by adding a credit card — it's used for identity verification only. Setting `timeout_secs=0` requests the plan maximum. When `timeout_secs` elapses: * **Named sandboxes** auto-**suspend** — state is preserved and you can `resume`. * **Ephemeral sandboxes** auto-**terminate** — the state is gone. ```python theme={null} # Auto-suspend a named sandbox after 30 minutes of inactivity sandbox = Sandbox.create(name="my-env", timeout_secs=1800) ``` ## What are the build-time defaults for a Tensorlake sandbox image? Build-time defaults are `cpus=2.0`, `memory=4096 MB`, and `disk=10 GiB`. Override them with `--cpus`, `--memory`, and `--disk_mb` in the CLI, or `cpus`, `memoryMb`, and `diskMb` in SDK options. See [Sandbox Images](/sandboxes/images) for full image-build parameters.