Testing matrix
Every client and device we test against.
28 emulated client profiles, grouped below. This list is read live from the product — it changes exactly when the matrix does.
Client and device matrix
Webmail · 9
- Gmail
- Gmail (non-Google address)
- Gmail (narrow window)
- Outlook.com
- Outlook.com (macOS)
- Yahoo Mail
- AOL Mail
- GMX
- Proton Mail
Desktop · 9
- Outlook 365
- Outlook 365 (narrow pane)
- Outlook 2019
- Outlook 2013
- Apple Mail
- Outlook for Mac
- Apple Mail (narrow)
- Thunderbird
- Windows Mail
Mobile · 10
- iOS Mail 18
- iOS Mail 18 (iPhone SE)
- Apple Mail (iPad)
- iOS Mail 17
- Gmail Android
- Gmail Android (folded)
- Yahoo Mail (Android)
- Gmail iOS
- Outlook Android
- Samsung Mail
Price comparison
What the matrix costs, stated plainly.
| Plan | Price | Included | Note |
|---|---|---|---|
| EmailOnSteroids (Pro) | €69/mo | Full matrix, unlimited eligible tests | Flat price — no per-preview meter. |
| Mailgun Inspect Basic | $99/mo | 1,000 previews included | $0.15/preview after that. |
| Mailgun Inspect Premium | $199/mo | 2,000 previews included | $0.15/preview after that. |
Our price is the published Pro plan (see /pricing). The Mailgun Inspect figures are the same ones cited on /story, sourced from Mailgun's published Inspect pricing and product documentation as of August 2026. EmailOnSteroids is an independent product and is not affiliated with Email on Acid, Mailgun, Sinch, testi.at, or Litmus.
Get started