Buttondown
Free for your first 100 subscribers, including a custom sending domain.
Email
What you get
Free for the first 100 subscribers, with a rich-text or Markdown editor and sending from a custom domain.
How to get it
Sign up at buttondown.com.
The catch
Past 100 subscribers you move to a paid tier.
From the official page · checked Oct 20, 2026
Compared in: Best free funnel, newsletter & email tools (2026)