Datawrapper
Clean, accurate charts, maps and tables for data-driven posts
Directory / Embeds & Interactive / Tally
Tally
Our verdict: The most generous free form builder. Substack posts can't host forms directly, so link to it from your post or About page.
Best for
Reader surveys, sponsor inquiry forms and feedback forms
Pricing
Free (unlimited forms and submissions); Pro $24/mo; Business $74/mo.
Source: official site
Website
Last checked
2026-10-18
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