Side by side

CAPE Sandbox vs E2B

Both stand on sandbox software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

CAPE Sandbox

Free plan APILinuxSelf-hosted+1

CAPE Sandbox combines isolated execution with behavioral instrumentation, artifact collection, unpacking, and classification tools. Teams should account for its recommended environment and the disabled-by-default active unpacking behavior.

Visit CAPE Sandbox

E2B

Free plan Open source APILinuxMac+3

E2B offers managed or self-hosted isolated environments with APIs, code interpretation, and desktop support for agents. The free plan has session and concurrency limits, while Pro adds longer sessions for a monthly fee plus usage costs.

Visit E2B

The facts

	CAPE Sandbox	E2B
Free plan	Yes	Yes
Open source	Not published	Yes
Runs on	API, Linux, Self-hosted, Web	API, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Free or on request	Pro: $150 a month
Plans published	1	3
Maker	Not published	Not published
Website	github.com	e2b.dev
On sandbox software	#4 of 26	#1 of 26

CAPE Sandbox: what it does well

Captures behavior, network traffic, screenshots, and memory.
Supports dynamic unpacking and configuration extraction.
Offers a REST API and distributed setup guidance.
Free, open-source, and self-hosted.

What to know first

Active unpacking is off by default.
The project recommends specific installation, target, and hypervisor choices.
Versions 5.0.x and below 4.0 are marked unsupported.

E2B: what it does well

Each sandbox has its own Firecracker microVM and kernel.
Code Interpreter supports Python and JavaScript.
Cloud regions include US, EU, and APAC.
Runtime is Apache-2.0 licensed and self-hostable.

What to know first

Hobby sessions are limited to one hour.
Hobby includes 20 concurrent sandboxes.
Pro costs $150 per month plus usage costs.
BYOC is available on Enterprise plans.

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