Browser platforms / CloudBrowser AI alternative

CloudBrowser AI alternative

CloudBrowser AI at cloudbrowser.ai provides remote Chrome, MCP tools and a browser API with live desktop control. Its saved-session option has a specific scope: cookies and localStorage, without open tabs. Compare that browser state with the complete Linux environment a broader agent needs to return to.

Start buildingCompare capabilities ↓

Reviewed 2026-10-18 · Published by the Sandbox0 team

When CloudBrowser AI fits

CloudBrowser AI fits teams wanting remotely controlled Chrome, live observation or handoff, and MCP/API access from an existing assistant. It is distinct from the BrowserCloud.io service and has its own session and plan contract.

When to consider Sandbox0

Consider Sandbox0 when the agent also needs persistent system tools, package installs, configuration and growing files. You can retain the remote browser as a tool or run a compatible browser stack; supply proxies and live-control features according to the application’s needs.

Capabilities

CloudBrowser AI and Sandbox0: what persists?

Feature comparison with documentation and verification status
Environment and runtime lifetimeCloudBrowser AIIdle closure defaults to 300 seconds; keepOpen: 0 disables that inactivity rule. This does not remove other account limits or make an open browser free.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 filesCloudBrowser AISaved cookies/localStorage are documented; a general-purpose durable Linux disk is not established.View evidence ↗Sandbox0The writable RootFS survives successful checkpoints, including software, system configuration, dependencies, and user data.Read documentation →
Whole RootFSCloudBrowser AIPer-browser containers do not establish persistence of the whole writable Linux RootFS.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 stateCloudBrowser AISaved browser storage and inactivity controls are not arbitrary-machine pause/restore.View evidence ↗Sandbox0Pause compute between tasks; resume on available capacity. Default resume starts fresh processes from the saved filesystem.Read documentation →
Memory and process stateCloudBrowser AISaved sessions omit open tabs and do not establish arbitrary process-memory 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.

CloudBrowser AI preserves selected browser storage when saving is enabled. Its browser-hour/usage-unit plan does not establish automatic expansion of a complete Linux filesystem. Sandbox0 retains the agent’s installed tools, system configuration and accumulated files in its separate 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.

Listing saved browser sessions is not a full Linux Files API. The reviewed docs do not establish read/write access to an agent’s paused RootFS; persist important artifacts and navigation state in the surrounding application.

See paused file operations →

Saving a session does not restore its open tabs

The Open Browser reference says saveSession periodically saves cookies and localStorage and saves again at the end; it does not save open tabs. Saving and recovery default to false, and labels identify the saved state. The separate saved-session list exposes creation/update timestamps. Explicitly restore navigation and application progress around that narrower saved state.

Source 1 ↗Source 2 ↗

Idle closure can be configured independently of account hours

keepOpen is an inactivity setting in seconds, defaulting to 300. Zero disables that inactivity closure according to the reference; it does not establish a free idle browser, a guaranteed uninterrupted computer or an exception to other service limits. Close unused browsers and budget actual open-session usage.

Source 1 ↗

A managed browser container is one tool boundary

The architecture guide describes each browser running in its own container and returning a WebSocket endpoint. The public site also offers MCP and live remote desktop. These interfaces can serve an agent hosted elsewhere; they do not establish a customer-managed Linux installation or arbitrary process-memory restore.

Source 1 ↗Source 2 ↗

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.

CloudBrowser AI

Pricing reviewed 2026-10-18

Basic, monthly billing
$25/month
250 browser-hours, ten concurrent instances, three tabs per instance; 30,000 usage units shown.
Rate source ↗
Premium, monthly billing
$90/month
1,000 browser-hours, 25 concurrent instances, three tabs per instance; 120,000 usage units shown.
Rate source ↗
Basic trial
7 days
Trial on Basic, rather than a separately documented permanent free compute tier.
Rate source ↗
Custom
Workload-specific quote
Custom hours/concurrency and dedicated proxies; verify contract details.
Rate source ↗

The monthly cards include premium proxy access and live remote desktop; annual plans advertise two months free. The reviewed homepage does not establish a general conversion for every usage unit or an unlimited proxy-bandwidth allowance. Do not add browser hours and usage units as independent pools or treat tab/concurrency limits as retained Linux disk capacity.

Check current CloudBrowser AI 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 CloudBrowser AI

  1. Record MCP/API methods, labels, save/recover flags, proxy requirements, tab/concurrency limits and navigation that saved sessions do not retain.
  2. Port compatible agent tools and durable outputs to Sandbox0, keeping CloudBrowser AI as a remote browser where useful or supplying a tested replacement.
  3. Verify reauthentication and tab reconstruction, inactivity behavior, system-package retention, online RootFS growth, paused files and combined browser/runtime cost.

Common questions

Is Sandbox0 a drop-in CloudBrowser AI replacement?

Evaluate API compatibility and product scope. These products serve different core workflows, so a change may require a different architecture.

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 ↗cloudbrowser.gitbook.io/docs/get-started/browser-management/open-browser.md ↗cloudbrowser.gitbook.io/docs/get-started/browser-management/get-saved-sessions.md ↗cloudbrowser.gitbook.io/docs/cloud-service/how-it-works.md ↗cloudbrowser.ai/ ↗Sandbox0 RootFS capacity →

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