Isle: Pricing, Features & Best Use Cases

Our take: Isle provides managed, application-aware desktop environments for AI agents, ideal for teams automating engineering software like KiCad or FreeCAD with built-in health monitoring and checkpoint recovery.

Main limitation: File uploads/downloads limited to 4 MiB each; recordings capped at 512 MiB or six hours

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Is Isle right for you?

Isle provides managed, application-aware desktop environments for AI agents, ideal for teams automating engineering software like KiCad or FreeCAD with built-in health monitoring and checkpoint recovery. Based on the vendor's documentation, not on a hands-on test.

Best for: AI agent developers

Also a good fit for

Teams automating engineering desktop software

Consider another tool if file uploads/downloads limited to 4 MiB each

Or if

Recordings capped at 512 MiB or six hours
Requires an API key and account

Isle pricing and usage limits

Prices checked Oct 1, 2026 on the official US pricing page. Official pricing ↗ Prices and limits change often.

Free access and trial conditions

Free plan includes 5 environment-hours per month

Paid plans: what changes as you upgrade

Free self-serve

Free source (opens in a new tab)

Month

For: Evaluation and light development

Limits

5 environment-hours per month
30 minute session runtime maximum

1 more

1 concurrent environment

Includes

KiCad and FreeCAD support
Python SDK access

1 more

Artifact checkpoints

API included

Developer self-serve

$29/mo source (opens in a new tab)

Month

For: Active development and production use

Limits

100 environment-hours per month
No per-session runtime cap

1 more

5 concurrent environments

Includes

KiCad and FreeCAD support
Priority support

2 more

Python SDK access
Persistent Python execution

API included

Enterprise sales

Custom pricing source (opens in a new tab)

Month

Contact sales for pricing

For: Large-scale production deployments

Limits

Unlimited environment-hours
Unlimited concurrency

1 more

Custom application environments

Includes

Custom application environments
Dedicated support

1 more

SLA and uptime guarantees

API included

Usage caps, credits and extra costs

Overage not mentioned in public pricing

What is Isle, and how does it work?

Isle provides managed desktop environments where the target application is already installed and open, so computer-use agents can operate it. It monitors application health, contains the agent within the workflow and supports artifact checkpoints. Developers create sandboxes through a Python SDK or REST API, control them with screenshot, mouse, keyboard and file-transfer primitives, and can stop and resume environments with state preserved.

Isle's official site: how the product presents itself. tryisle.com, captured Oct 1, 2026

What you provide and what you get back

What you give Isle and what comes back, from its documentation

You provide

Agent instructions and models via SDK or REST API
File uploads (max 4 MiB per upload)
Keyboard and mouse commands
Python code for persistent execution

You get back

Screenshots and observations of the desktop
Recordings (max 512 MiB or 6 hours)
File downloads (max 4 MiB per download)
Execution results and Python output

Where you can use it

Platforms: API
Account: Required
: KiCad (schematic capture, PCB layout, Gerber/BOM export)
: FreeCAD (parametric modeling, STEP/IGES/STL/native export)
: Python 3.9+; requires isle-sdk>=0.2.0 for persistent execution
: 4 MiB per upload/download
: 512 MiB maximum or 6 hours per session
: Billing automatically pauses when a sandbox is stopped

What people use Isle for

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Running computer-use agents on CAD/EDA software

Who: AI developers and engineers
You provide: KiCad or FreeCAD environment with agent instructions
Expected result: Automated PCB design, schematic capture, or 3D modeling
Plan needed: Start free (5 env-hours/month) or Developer ($29/month for 100 env-hours)
Limitation: Individual file transfers limited to 4 MiB source (opens in a new tab)

Automating KiCad or FreeCAD tasks with AI agents

Who: Electronics and mechanical design teams
You provide: Project files and design specifications
Expected result: Completed PCB layouts, schematics, or mechanical designs
Plan needed: Developer plan ($29/month) recommended for production use
Limitation: Runtime capped at 30 minutes per session on Free plan source (opens in a new tab)

Checkpointing agent progress on long desktop tasks

Who: Development teams needing fault recovery
You provide: Agent state and intermediate designs
Expected result: Safe restore points for complex, multi-step automation
Plan needed: All plans include artifact checkpoints
Limitation: Recording limited to 512 MiB or 6 hours per session source (opens in a new tab)

Key features and their practical limits

Feature overview on the official site. tryisle.com, captured Oct 1, 2026

Preinstalled application environments (KiCad, FreeCAD)

Provides ready-to-use KiCad and FreeCAD installations in managed sandboxes Eliminates setup time and configuration complexity for agents

Access: Automatically available when creating a sandboxLimit: Limited to KiCad and FreeCAD; other applications available on Enterprise plan source (opens in a new tab)

Application health monitoring

Continuously monitors the state of KiCad or FreeCAD Ensures the application is running and ready before agent actions

Access: Automatic; check capabilities() APILimit: Monitoring is application-specific, not OS-level source (opens in a new tab)

Artifact checkpoints and restore

Creates and restores snapshots of application state Allows recovery from agent errors or incomplete actions

Access: Through SDK and REST APILimit: Checkpoint storage counts toward environment limits source (opens in a new tab)

Python SDK and REST API

Provides multiple integration options for agent control Supports any agent loop or model via consistent primitives

Access: SDK via pip, REST API documented in quickstartLimit: Python 3.9+ required for SDK source (opens in a new tab)

Isle pros and cons

Reasons to choose Isle

Works with any computer-use model or agent loop Framework-agnostic design integrates with Claude, GPT, or custom agents documented source (opens in a new tab)
Python SDK and REST API documented Multiple integration paths with clear examples and quickstart guide documented source (opens in a new tab)
Billing pauses when a sandbox is stopped Cost-effective for intermittent workloads documented source (opens in a new tab)
Artifact checkpoints can be saved before important actions and restored, with recovery controls to restart the application An agent that crashes or loses work in KiCad can resume from the last safe state. documented source (opens in a new tab)
KiCad and FreeCAD environments produce KiCad-native, Gerber, BOM, STEP, IGES and STL files Agent output can be handed straight to PCB fabrication or CAD workflows. documented source (opens in a new tab)

Check before paying for Isle

File uploads/downloads limited to 4 MiB each Large datasets or binaries require workarounds or direct S3 integration documented source (opens in a new tab)
Recordings capped at 512 MiB or six hours Long-running sessions lose recording history if limit exceeded documented source (opens in a new tab)
Requires an API key and account Authentication overhead; cannot use without registration documented source (opens in a new tab)
Limited set of supported applications listed Requires Enterprise plan for custom applications documented source (opens in a new tab)
The /pricing page returned HTTP 404 when checked Cost per sandbox hour cannot be compared before signing up. documented source (opens in a new tab)

How to use Isle for setting up an AI agent to control KiCad or FreeCAD via Isle

Isle documentation: where the steps below come from. tryisle.com, captured Oct 1, 2026

Set up Isle

Install Python SDK with: python -m pip install --upgrade 'isle-sdk>=0.2.0'
Create an account at tryisle.com and generate an API key in the dashboard
Set environment variable: export ISLE_API_KEY=isle_... (your key from step 2)
Initialize Isle client and create a sandbox

Example: setting up an AI agent to control KiCad or FreeCAD via Isle

Create a sandbox: sandbox = isle.sandboxes.create('kicad', name='Power supply board')
Wait for readiness: sandbox.wait_until_ready()
Connect your agent to control the desktop via screenshot(), mouse.click(), keyboard.type(), and file transfer methods

Review and export the result

Verify capabilities with: sandbox.capabilities() (should show execution available)
Test a simple action: sandbox.mouse.click(500, 300) and take a screenshot to confirm state

Example prompt suggested by our editors (not a recorded output of the product)

Design a simple breadboard circuit with a 100nF capacitor in KiCad by placing and connecting components

Isle integrations and API

Isle documentation (continued). tryisle.com, captured Oct 1, 2026

Native integrations and export formats

Export: Gerber (electronics), STEP, IGES, STL (mechanical), Native KiCad and FreeCAD files

API access and separate billing

Isle has no public API in its official documentation. REST API available for non-Python integrations API documentation ↗

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Screenshots, file uploads, keyboard/mouse actions sent to Isle servers

Commercial use and plan restrictions

Allowed for API users; own IP retained

Controls for business users

API key-based authentication
Sandbox isolation per session

Best Isle alternatives for different needs

"Better suited" is based on documented features and pricing, not on a head-to-head test.

Replit: better suited to general-purpose web and desktop app hosting

Cursor: better suited to aI-powered code editor

Alternatives
Alternative	When to choose it	Pricing	Limitation
Replit	Need browser-based IDE and broader app support	Free and paid plans available	Not specifically optimized for computer-use agents	Compare
Cursor	Focus is on coding assistance rather than desktop automation	Free and Pro available	Limited to code editing; not a desktop environment manager	Compare

Explore Isle further

Isle pricing, plan by planEvery plan with USD prices, limits and what is free.Best Isle alternativesTools for the same job, by need and starting price.Best AI coding toolsOur picks in this category, compared by price and free tiers.Prompts for IsleReady-to-copy prompts with their sources.

Related to Isle

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Guides and comparisons

Isle user reviews

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Isle FAQ

What models does Isle work with?

Isle is framework-agnostic and works with any computer-use model or agent loop, including Claude (via computer-use), GPT-6 Astra, and custom agents. You bring the model, Isle manages the desktop. source (opens in a new tab)

Can I use custom applications beyond KiCad and FreeCAD?

Custom application environments are available on the Enterprise plan. Contact sales at tryisle.com for a demo and custom configuration. source (opens in a new tab)

What is the file upload/download limit?

Individual uploads and downloads are limited to 4 MiB each. This covers most designs but large binaries may require workarounds. source (opens in a new tab)

What happens to my sandbox when I stop it?

When you stop a sandbox, billing pauses and files persist. You can resume it later with its state intact using sandbox.resume(), or permanently delete it with sandbox.destroy(). source (opens in a new tab)

Does Isle include persistent Python execution?

Yes, new environments with Isle SDK 0.2.0+ support persistent Python on the desktop. Variables and imports persist between cells, allowing complex automation sequences. source (opens in a new tab)

Recent changes that affect your choice

Oct 1, 2026:

Sources and review methodology

Official sources and verification dates

Isle | Desktop applications, ready for agents homepage · checked Oct 1, 2026
Documentation | Isle docs · checked Oct 1, 2026

Not verified: Privacy policy (404 error); Trial period details; Overage charges for exceeding plan limits; Payment methods accepted.

How we documented and maintain this page

Every fact about Isle above comes from the 2 official pages listed here, last compared on Oct 1, 2026; we have not run Isle ourselves, so it has no editorial score. How we check and re-check pages.

Article updated Oct 10, 2026; prices checked Oct 1, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error