# Litmus: how AI models rank it, October 2026

GTM AI Recommendation Index, October 2026 Edition. Named in 22 judge labels across 1 categories by 12 of 14 models. Page: https://gtm-ai-index.com/vendors/litmus/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Email deliverability and testing tools | 0% | 26 | 23% | 22 |

## What the models said for it

- "Rendering previews across 100+ email clients, automated QA checklist, with a deliverability upgrade." (Muse Glimmer 30B, Email deliverability)
- "consider Litmus instead: it combines previews across 100+ clients with spam testing" (GPT-6 Luna, Email deliverability)
- "If your team prioritizes rendering over placement, consider Litmus as a close second." (Grok 4.1 Fast, Email deliverability)
- "Litmus is the premium industry heavyweight... However, it comes with a high price tag" (Gemini 3.5 Flash, Email deliverability)

## And against it

- "Litmus, for example, positions spam testing as part of QA and blocklist/authentication checks, not a guarantee." (GPT-5.4 mini, Email deliverability)
- "Litmus is the giant in this space, but its pricing scales aggressively for collaborative marketing teams" (Gemini 3.5 Flash, Email deliverability)
- "Litmus, for example, describes collection, storage, and sharing of information in its privacy policy." (GPT-6 Luna, Email deliverability)
- "Litmus covers these lightly but isn't purpose-built for them." (Claude Haiku 4.5, Email deliverability)

## What it publishes

Every page litmus.com exposes, read 2026-10-05: 1503 addresses. By kind, pages and the last 90 days:

- blog: 1081 pages, 7 in the last 90 days, latest 2026-09-02
- case study: 57 pages, 0 in the last 90 days, latest undated
- webinar or virtual event: 60 pages, 0 in the last 90 days, latest 2022-02-16
- conference or event: 17 pages, 0 in the last 90 days, latest undated
- report or ebook: 11 pages, 0 in the last 90 days, latest 2017-03-13
- comparison: 19 pages, 0 in the last 90 days, latest 2024-10-18
- template or tool: 7 pages, 0 in the last 90 days, latest 2022-09-20
- glossary or explainer: 9 pages, 0 in the last 90 days, latest 2026-07-02
- news or press: 47 pages, 0 in the last 90 days, latest undated
- Recent: 2026-09-02 blog: Best email subject lines for black friday cyber monday https://www.litmus.com/blog/best-email-subject-lines-for-black-friday-cyber-monday
- Recent: 2026-08-26 blog: The email footer small space big responsibility https://www.litmus.com/blog/the-email-footer-small-space-big-responsibility
- Recent: 2026-08-04 blog: How to protect your email program during a rebrand a practitioners guide https://www.litmus.com/blog/how-to-protect-your-email-program-during-a-rebrand-a-practitioners-guide
- Recent: 2026-07-24 blog: We want your email preference new approach to opting in https://www.litmus.com/blog/we-want-your-email-preference-new-approach-to-opting-in
- Recent: 2026-07-21 blog: Happy birthday now buy yourself a present the potential of birthday emails https://www.litmus.com/blog/happy-birthday-now-buy-yourself-a-present-the-potential-of-birthday-emails
- Recent: 2026-07-20 blog: Email deliverability facts https://www.litmus.com/blog/email-deliverability-facts

## Record

- Method: https://gtm-ai-index.com/methodology/
- Raw judge labels and full responses: https://gtm-ai-index.com/data/
- License: CC BY 4.0. Cite as GTM AI Recommendation Index, October 2026 Edition, gtm-ai-index.com.