Best Substack alternatives
Ranked by Share of Answer — how often each vendor is the AI's single first pick for Email marketing platforms, pooled across GPT-5.5, Claude, and Gemini. Updated weekly (2026-06-28).
When buyers ask AI for the best email marketing platforms, Substack is the first pick 2% of the time — strongest with Anthropic (7%). The alternative the models recommend most instead is Klaviyo at 25%. Here are the 12 alternatives ranked by what the models actually recommend.
Substack alternatives, ranked by AI
| # | Alternative | Share of Answer | Considered | Anthropic | OpenAI | |
|---|---|---|---|---|---|---|
| 1 | Klaviyo | | 34% | 36% | 38% | · |
| 2 | Hubspot Email | | 18% | 25% | 25% | · |
| 3 | Mailchimp | | 33% | 21% | 3% | · |
| 4 | Convertkit | | 10% | 1% | 14% | · |
| 5 | Mailerlite | | 8% | · | 9% | · |
| 6 | Postmark | | 4% | · | 9% | · |
| 7 | Sendgrid | | 6% | 2% | 1% | · |
| 8 | Beehiiv | | 7% | 2% | · | · |
| 9 | Mailgun | | 5% | 2% | · | · |
| 10 | Brevo | | 13% | 1% | · | · |
| 11 | Constant Contact | | 6% | 1% | · | · |
| 12 | Sender | | 0% | · | 1% | · |
Per-model cells = that model's Share of Answer for the vendor. · = never first-picked by that model. How this is measured →
See where Substack and every alternative rank head-to-head, with confidence intervals and weekly movement, on the full Email marketing platforms leaderboard →