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Robly vs Substack

Robly: Small businesses seeking higher open rates. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.

Robly

Free tier
No free plan; 14-day trial
Paid from
$15/mo (annual, up to 500 contacts) · pricing page
Public API
Yes docs
MCP server
No · No official or community Robly MCP server found.
Best for
Small businesses seeking higher open rates
Website
https://www.robly.com

Substack

Free tier
Free to publish, no subscriber cap
Paid from
No monthly fee; 10% of paid subscription revenue plus Stripe fees · pricing page
Public API
Yes docs
MCP server
Community · Community servers on GitHub only
Best for
Writers making money doing the work they believe in
Website
https://substack.com

Which one?

Robly suits small businesses seeking higher open rates. Substack suits writers making money doing the work they believe in. Pricing changes; the fact tables above link both vendors' live pricing pages. For the rest of the field, see Robly alternatives, Substack alternatives, or the full table.