Agent sandboxes / YepCode Run and Storage alternative

A YepCode Run alternative for a returning Linux agent

YepCode Run executes JavaScript and Python for agents with dependency installation, limits, secrets and structured results. YepCode Storage separately retains files and exposes external APIs. Local process disk is temporary, so persistent artifacts and the operating-system environment have different lifecycles.

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Reviewed 2026-10-19 · Published by the Sandbox0 team

When YepCode Run and Storage fits

YepCode fits teams executing code snippets and automations with its JavaScript/Python environment, integrations, schedules and Storage APIs. Those execution and data interfaces can remain useful parts of an agent workflow.

When to consider Sandbox0

Choose Sandbox0 for compatible Linux agents needing installed system tools, configuration and files across the complete durable writable RootFS, with automatic online growth and supported files while compute stays paused.

Capabilities

YepCode Run and Storage and Sandbox0: what persists?

Feature comparison with documentation and verification status
Environment and runtime lifetimeYepCode Run and StoragePublished per-execution limits vary by plan: 30 seconds on Developer, one hour on Starter and twelve hours on Growth; Enterprise limits are configurable.View evidence ↗Sandbox0ttl and hard_ttl default to 0 (disabled). Configure idle pause and deletion policies for the same persistent sandbox identity; an idle running sandbox still accrues compute charges.Read documentation →
Persistent filesYepCode Run and StorageYepCode Storage retains files across runs and supports external file APIs; local process disk is temporary.View evidence ↗Sandbox0The writable RootFS survives successful checkpoints, including software, system configuration, dependencies, and user data.Read documentation →
Whole RootFSYepCode Run and StorageTemporary process files are cleaned after execution, while persistent artifacts must use the separate Storage service.View evidence ↗Sandbox0Persistence extends beyond /workspace to paths such as /usr/local, /etc, and /home. Runtime tmpfs and virtual filesystems are excluded.Read documentation →
Release compute, keep stateYepCode Run and StorageExecution time limits and scheduled processes do not establish durable whole-machine pause/resume.View evidence ↗Sandbox0Pause compute between tasks; resume on available capacity. Default resume starts fresh processes from the saved filesystem.Read documentation →
Memory and process stateYepCode Run and StorageCode execution and stored artifacts do not establish saved arbitrary process/RAM checkpoints.View evidence ↗Sandbox0Experimental memory checkpoints can preserve compatible process state. Use memory: true on both pause and resume on a compatible deployment. A filesystem checkpoint alone does not preserve running processes.Read documentation →

Online RootFS growth

On growth-enabled images, Sandbox0 automatically expands the writable RootFS as free space runs low, within a configured sparse logical ceiling up to 64 TiB. Agent processes keep running. Growth is enabled in the qualified Cloud region; confirm activation for other regions. Existing images and snapshots retain their captured storage geometry. The ceiling is logical capacity, not preallocated host disk.

Larger plan-specific local-disk allowances remain temporary and separate from YepCode Storage. They do not establish automatic online growth of a complete durable agent RootFS.

Files while compute is paused

Sandbox0's Files API reads persistent files without resuming compute. Filesystem-only pauses also permit edits; retained-memory pauses are read-only and reject mutations with 409. SSH, SFTP, file watching, and runtime-only mounts require running compute.

YepCode already provides external Storage APIs and signed URLs for retained files. Sandbox0’s distinction is supported operations on its durable writable RootFS while guest compute is paused, with mutations restricted to filesystem-only generations.

See paused file operations →

Local process files are cleaned after execution

YepCode’s local-disk guide explicitly says the temporary directory is cleaned after process execution and must not be relied on between executions. Upload required results to YepCode Storage for retention. A paid plan’s larger local disk allowance changes capacity, not this temporary lifecycle.

Source 1 ↗

Storage already works through external APIs and signed URLs

YepCode Storage supports upload, download, list, delete and signed URLs through SDKs, REST and MCP tools. That is independent artifact access, rather than retention of every runtime operating-system path or process memory.

Source 1 ↗Source 2 ↗

A Yep is rounded execution time with plan-specific limits

One Yep is one process-execution second rounded up. Starter includes fifteen million Yeps and a one-hour execution limit; Growth includes 150 million and a twelve-hour limit. Paid overage and unused-credit rollover rules differ from the free plan, and Enterprise resource limits are configurable.

Source 1 ↗

Pricing

Compare billing models, then price your workload

CPU allocation, memory, billing minimums, disk, plan fees, and supported workload differ. These meters are not equal-performance machine quotes. Confirm region, resource units, and included allowances before estimating a total.

YepCode Run and Storage

Pricing reviewed 2026-10-19

Developer
$0 with 50,000 Yeps included
30-second executions, one concurrent execution and daily limits.
Rate source ↗
Starter
$119/month with 15 million Yeps
Extra Yeps: $0.00001 each.
Rate source ↗
Growth
$599/month with 150 million Yeps
Extra Yeps: $0.000005 each.
Rate source ↗
Enterprise
Starting at $1,800/month
Custom resource and deployment terms.
Rate source ↗

A fractional execution second rounds up to one Yep. Unused Yeps do not roll over. Starter and Growth have different RAM, concurrency, file-count, local-disk and history limits; history retention is not a whole-filesystem checkpoint promise. Include the needed storage and account features when comparing costs.

Check current YepCode Run and Storage pricing ↗

Sandbox0

$0.015/GiB-hour compute (billed by the second at approximately $0.000004167/GiB-second), plus $0.02/GiB-month of retained incremental RootFS and memory checkpoint data. Shared base images and platform recovery retention are excluded; paused sandboxes accrue storage charges only.

Compute / GiB-hour
$0.015
Retained data / GiB-month
$0.02
Paused compute
$0.00

A 4 GiB agent, 100 running hours

$6.00 compute

4 GiB × 100 hours, billed by the second. Keeping 20 GiB of billable incremental data for a full billing month adds $0.40. CPU is derived from memory by the platform; choose a tier that fits your workload.

Understand storage billing →

Before migrating from YepCode Run and Storage

  1. Inventory JavaScript/Python processes, packages, secrets, schedules, temporary paths, stored artifacts and per-plan execution limits.
  2. Retain required APIs or port compatible Linux execution with verified tools and exported Storage files.
  3. Test system retention, online growth and paused files separately from process results and rounded execution-second costs.

Common questions

Is Sandbox0 a drop-in YepCode Run and Storage replacement?

Evaluate API compatibility and product scope. A shared sandbox category does not make SDKs, lifecycle semantics, or limits interchangeable.

Does keeping files also keep a running agent?

Filesystem state and volatile process state are separate. Sandbox0 requires explicit compatible memory checkpoints to preserve running processes; its default filesystem resume starts fresh processes.

Sources and review scope

The Boat team's Battleships directory is the discovery source. References below describe the product and plan discussed on this page. Check current availability, regional terms and billing units before migrating. Where the cited material does not establish a capability or price, the comparison identifies that uncertainty.

Battleships research record ↗yepcode.io/docs/processes/local-disk/ ↗yepcode.io/docs/storage/ ↗yepcode.io/blog/secure-code-execution-in-ai-agents.md ↗yepcode.io/pricing/ ↗Sandbox0 RootFS capacity →

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