# Microsoft SNDS alternatives: what AI models name instead, October 2026

GTM AI Recommendation Index, October 2026 Edition. 226 of the 252 answers in the 1 category where Microsoft SNDS 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/microsoft-snds/alternatives/

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

- GlockApps: 56
- Validity Everest: 33
- Litmus: 9
- Google Postmaster Tools: 8
- MailReach: 7
- Instantly: 6

## Email deliverability and testing tools

**Small business**: 74 of 84 answers did not name Microsoft SNDS (Microsoft SNDS is #9 of 15 at 3%).

- GlockApps: first choice in 23 of those 74
- Google Postmaster Tools: first choice in 5 of those 74
- Litmus: first choice in 4 of those 74
- Email on Acid: first choice in 3 of those 74
- Instantly: first choice in 3 of those 74
- Mail-Tester: first choice in 3 of those 74
- MailReach: first choice in 3 of those 74
- MailerCheck: first choice in 3 of those 74

**Mid-market**: 75 of 84 answers did not name Microsoft SNDS (Microsoft SNDS is #7 of 12 at 3%).

- GlockApps: first choice in 30 of those 75
- MailReach: first choice in 4 of those 75
- Google Postmaster Tools: first choice in 3 of those 75
- Mail-Tester: first choice in 3 of those 75
- Folderly: first choice in 2 of those 75
- Validity Everest: first choice in 2 of those 75
- Allegrow: first choice in 1 of those 75
- EmailListVerify: first choice in 1 of those 75

**Enterprise**: 77 of 84 answers did not name Microsoft SNDS (Microsoft SNDS is #11 of 14 at 0%).

- Validity Everest: first choice in 31 of those 77
- Litmus: first choice in 5 of those 77
- Everest: first choice in 4 of those 77
- GlockApps: first choice in 3 of those 77
- Instantly: first choice in 3 of those 77
- Mailgun: first choice in 3 of those 77
- SendGrid: first choice in 3 of those 77
- Validity Engage: first choice in 3 of those 77

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