# Email on Acid alternatives: what AI models name instead, November 2026

Gane Index, November 2026 Edition. 229 of the 252 answers in the 1 category where Email on Acid holds a standing named it neither first nor as an alternative; these are the first choices those answers made. Page: https://www.gane.ai/index/gtm/vendors/email-on-acid/alternatives

## Named instead, most often (every category and segment added)

- GlockApps: 43
- Validity Everest: 30
- Google Postmaster Tools: 19
- Sender: 12
- MXToolbox: 10
- Instantly: 8

## Email deliverability and testing tools

**Small business**: 76 of 84 answers did not name Email on Acid (Email on Acid is #15 of 15 at 0%).

- GlockApps: first choice in 16 of those 76
- Google Postmaster Tools: first choice in 11 of those 76
- MXToolbox: first choice in 7 of those 76
- Sender: first choice in 7 of those 76
- Instantly: first choice in 6 of those 76
- Mail-Tester: first choice in 6 of those 76
- MailerLite: first choice in 3 of those 76
- Brevo: first choice in 2 of those 76

**Mid-market**: 75 of 84 answers did not name Email on Acid (Email on Acid is #14 of 19 at 0%).

- GlockApps: first choice in 22 of those 75
- Google Postmaster Tools: first choice in 8 of those 75
- Sender: first choice in 5 of those 75
- MXToolbox: first choice in 3 of those 75
- Allegrow: first choice in 2 of those 75
- HubSpot Sales Hub: first choice in 2 of those 75
- Litmus: first choice in 2 of those 75
- Microsoft SNDS: first choice in 2 of those 75

**Enterprise**: 78 of 84 answers did not name Email on Acid.

- Validity Everest: first choice in 30 of those 78
- Validity Engage: first choice in 7 of those 78
- GlockApps: first choice in 5 of those 78
- Inbox Monster: first choice in 4 of those 78
- Litmus: first choice in 3 of those 78
- Mailgun Optimize: first choice in 3 of those 78
- Instantly: first choice in 2 of those 78
- Mailgun: first choice in 2 of those 78

Published under CC BY 4.0. The output is the models' output; nothing here is a recommendation by the index.