# Litmus: how AI models rank it, November 2026

Gane Index, November 2026 Edition. Named in 21 judge labels across 1 category by 14 of 14 models. Page: https://www.gane.ai/index/gtm/vendors/litmus

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| [Email deliverability and testing tools](https://www.gane.ai/index/gtm/marketing/email-deliverability-and-testing/index.md) | 6% | 4 | 10% | 21 |

## What the models said for it

- "I'd generally recommend Litmus if your priority is email testing, QA, rendering previews, and team workflow" (GPT-5.4 mini, Email deliverability)
- "Best Overall for Marketing Workflow & Outlook Testing: Litmus" (Gemini 3.5 Flash, Email deliverability)
- "Marketing team sending campaigns: Litmus + GlockApps" (GPT-5.4 mini, Email deliverability)
- "the safest "best" choice is usually Litmus" (GPT-5.4 mini, Email deliverability)

## And against it

- "Caveat: These are primarily design/rendering testing tools. Their inbox placement features are secondary." (Kimi K2, Email deliverability)
- "Overkill (and pricey) for mid-sized teams; better for enterprises" (DeepSeek V4 Flash, Email deliverability)

## By model

| Model | First choice | Alternative | Mention | Warning | Labels |
|---|---|---|---|---|---|
| Claude Haiku 4.5 | 0 | 1 | 0 | 0 | 1 |
| GPT-5.4 mini | 3 | 0 | 0 | 0 | 3 |
| Gemini 3.5 Flash | 1 | 1 | 0 | 0 | 2 |
| Perplexity Sonar | 0 | 1 | 0 | 0 | 1 |
| Grok 4.20 | 0 | 0 | 1 | 0 | 1 |
| Mistral Small | 0 | 2 | 0 | 0 | 2 |
| DeepSeek V4 Flash | 0 | 1 | 1 | 1 | 3 |
| Llama 4 Maverick | 0 | 0 | 1 | 0 | 1 |
| Qwen 3.7 Flash | 0 | 1 | 0 | 0 | 1 |
| Kimi K2 | 0 | 0 | 0 | 1 | 1 |
| GLM 4.7 FlashX | 0 | 1 | 0 | 0 | 1 |
| MiniMax M2.5 | 0 | 2 | 0 | 0 | 2 |
| GPT-6 Luna | 0 | 1 | 0 | 0 | 1 |
| Muse Glimmer 30B | 0 | 0 | 1 | 0 | 1 |

## Sources returned with these answers

The sites and pages cited by the answers that named Litmus, from 56 of the 68 answers that named it (only the models that return a source list).

### Domains cited

- g2.com: 21
- glockapps.com: 21
- unspam.email: 21
- emailtooltester.com: 16
- mailgun.com: 15
- prospeo.io: 14
- salesdorado.com: 14
- instantly.ai: 13
- myemailverifier.com: 13
- litmus.com: 12 (its own site)

### Pages cited

- https://glockapps.com/: 14
- https://myemailverifier.com/blog/email-deliverability-tools: 13
- https://unspam.email/articles/email-deliverability-softwares: 12
- https://emailtooltester.com/en/email-deliverability-test: 11
- https://wiredmessenger.com/blogs/best-email-deliverability-tools: 11
- https://salesdorado.com/en/inbound-marketing/email-testing-tools: 10
- https://saleshandy.com/blog/email-deliverability-tools: 9
- https://sendlayer.com/blog/best-email-deliverability-tools: 9

## 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://www.gane.ai/index/gtm/methodology
- License: CC BY 4.0. Cite as Gane Index, November 2026 Edition, www.gane.ai/index/gtm.