ArcBox vs Email on Acid

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

ArcBox

See full pricing history

USD · US · source: arcbox.dev

Plan	Pricing	Charged by	Offer type
Free — Linux and Windows	Free Free $0 to start Try Linux and Windows machines with usage credits. No card required.	Usage · Usage-based on every OS	Standalone · Free
Pro — Linux and Windows Highlighted	Usage-based billed by the second For teams running agents in production on Linux and Windows. Usage-based billed by the second For teams running agents in production on Linux and Windows.	Usage · Usage-based billed by the second	Standalone · Usage based

Email on Acid

See full pricing history

USD · US · source: www.emailonacid.com

Plan	Pricing	Charged by	Offer type
Basic Mailgun Inspect Highlighted	USD 99 monthly $99/month	Flat · published subscription	Standalone · Fixed
Premium Mailgun Inspect	USD 199 monthly $199/month	Flat · published subscription	Standalone · Fixed
Contract Mailgun Inspect	Contact sales Custom pricing	Flat · published subscription	Standalone · Contact sales

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

ArcBox

Free — Linux and Windows

Highlights Concurrent environments: Up to 5

Included
Highlights Support: Community support

Included
Highlights Stopped Computers disk storage: Included

Pro — Linux and Windows

Highlights Concurrent environments: Higher concurrency and larger machines

Included
Highlights Team workspaces and API keys: Included
Highlights Snapshot storage and warm pools: Included
Highlights Priority email support: Included

Email on Acid

Basic Mailgun Inspect

Official plan card Users: Unlimited

Limited
Official plan card Email previews: 1,000/month

Limited
Official plan card Preview clients and devices: 100+

Limited

Premium Mailgun Inspect

Official plan card Users: Unlimited

Limited
Official plan card Email previews: 2,000/month

Limited
Official plan card HTML, link, image, and spam checks: Included

Contract Mailgun Inspect

Official plan card Users: Unlimited

Limited
Official plan card Preview allowance: Custom

Limited
Official plan card Phone and chat support: Included

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

ArcBox

August 27, 2026 Source
- Free — Linux and Windows: Free
- Pro — Linux and Windows: Usage-based billed by the second For teams running agents in production on Linux and Windows.

Email on Acid

August 27, 2026 Source
- Basic Mailgun Inspect: USD 99 monthly
- Premium Mailgun Inspect: USD 199 monthly
- Contract Mailgun Inspect: Contact sales