# Substack: what AI models say (September 2026)

Source: Memetik Index, https://www.memetik.ai/vendors/substack
Website: https://substack.com

Substack was named in 50 of 50 AI answers across 1 category. Best position: Newsletter platforms, 100% answer share, ranked #1, named first in 64%.

## What Substack is

Substack is a platform for people who want to make money from work they believe in. It is for users who want to publish under their own editorial control, without gatekeepers.

Users can start a Substack and build a publication around their work. They retain ownership of their intellectual property, mailing list and subscriber payments. The platform also includes discussions that users can join.

(From Substack's own website, read 2026-09-02.)

## By category

| Category | Rank | Answer share | Named first | Models |
|---|---|---|---|---|
| Newsletter platforms (https://www.memetik.ai/index/newsletter-platforms) | #1 of 10 | 100% | 64% | GPT-5.6 Sol, ChatGPT, GPT-5.6 Luna, Claude Opus 5, Claude, Claude Fable 5, Gemini, Gemini 3.5 Flash, Perplexity, Sonar Reasoning Pro |

## What the models said

> "How to choose, in plain terms If you just want to write and maybe charge subscriptions with minimal friction: choose Substack."
> — Sonar Reasoning Pro, Newsletter platforms

> "Choose Substack if you have zero budget, no existing audience, and want built-in discovery to help get your first 100 paying subscribers."
> — Gemini, Newsletter platforms

> "For a writer in 2026, I’d recommend Substack if you want the fastest, simplest way to start publishing and possibly charge readers later."
> — Perplexity, Newsletter platforms

> "Choose Substack if you just want to write, build an intellectual audience, and avoid dealing with marketing tech or monthly hosting bills."
> — Gemini 3.5 Flash, Newsletter platforms