# Litmus alternatives: what AI models name instead, October 2026

GTM AI Recommendation Index, October 2026 Edition. 208 of the 252 answers in the 1 category where Litmus holds a standing named it neither first nor as an alternative; these are the first choices those answers made. Page: https://gtm-ai-index.com/vendors/litmus/alternatives/

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

- GlockApps: 48
- Validity Everest: 22
- Google Postmaster Tools: 17
- MXToolbox: 9
- Mail-Tester: 7
- MailReach: 7

## Email deliverability and testing tools

**Small business**: 73 of 84 answers did not name Litmus (Litmus is #8 of 15 at 5%).

- GlockApps: first choice in 21 of those 73
- Google Postmaster Tools: first choice in 10 of those 73
- MXToolbox: first choice in 6 of those 73
- Mail-Tester: first choice in 4 of those 73
- MailerCheck: first choice in 4 of those 73
- Email on Acid: first choice in 3 of those 73
- Instantly: first choice in 3 of those 73
- MailReach: first choice in 3 of those 73

**Mid-market**: 71 of 84 answers did not name Litmus (Litmus is #11 of 12 at 0%).

- GlockApps: first choice in 24 of those 71
- Google Postmaster Tools: first choice in 7 of those 71
- MailReach: first choice in 4 of those 71
- MXToolbox: first choice in 3 of those 71
- Mail-Tester: first choice in 3 of those 71
- Microsoft SNDS: first choice in 3 of those 71
- Folderly: first choice in 2 of those 71
- Validity Everest: first choice in 2 of those 71

**Enterprise**: 64 of 84 answers did not name Litmus (Litmus is #2 of 14 at 6%).

- Validity Everest: first choice in 20 of those 64
- Everest: first choice in 3 of those 64
- GlockApps: first choice in 3 of those 64
- Instantly: first choice in 3 of those 64
- Mailgun: first choice in 3 of those 64
- SendGrid: first choice in 3 of those 64
- Validity Engage: first choice in 3 of those 64
- Sender: first choice in 2 of those 64

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