# Courier: how AI models rank it, September 2026

GTM AI Recommendation Index, September 2026 Edition. Named in 21 judge labels across 2 categories by 9 of 12 models. Page: https://gtm-ai-index.com/vendors/courier/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Mobile marketing and push | 0% | 14 | 0% | 20 |
| In-app messaging and customer communications | 0% | 49 | 0% | 1 |

## What the models said for it

- "If you want flexibility, look into "notification infrastructure" platforms (such as Courier or Knock)." (Gemini 3.5 Flash, Mobile & push)
- "Choose Courier if you are building product notifications and need developer-friendly cross-channel infrastructure" (Perplexity Sonar, Mobile & push)
- "Courier is the clearest fit in the results... one API covers push, email, SMS, in-app inbox, Slack, and Microsoft Teams" (Perplexity Sonar, Mobile & push)
- "Courier is an API-first product notification engine that coordinates messages across channels" (Gemini 3.5 Flash, Mobile & push)

## 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, September 2026 Edition, gtm-ai-index.com.