# Mozilla Thunderbird: how AI models rank it, October 2026

IT AI Recommendation Index, October 2026 Edition. Named in 2 judge labels across 1 categories by 2 of 14 models. Page: https://it-ai-index.com/vendors/mozilla-thunderbird/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Email security | 0% | 71 | 100% | 2 |

## And against it

- "and Mozilla Thunderbird, due to their lackluster approach to data security and user privacy" (Llama 4 Maverick, Email security)
- "it lacks built-in end-to-end encryption by default, which can be a concern for sensitive communications" (Mistral Small, Email security)

## Movement since September 2026

Floor: 11 points of share, measured on the calibration repeat. A larger change is movement; a smaller one is noise.

- Email security: 0% to 0%, ±0. New · not ranked in September 2026 · rank 71 of 76.

## Record

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