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OneSignal vs Substack
OneSignal: Product teams wanting push, email, and SMS in one platform. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
OneSignal
- Free tier
- Free plan: 10,000 email sends/month (plus unlimited mobile push)
- Paid from
- $19/mo (Growth: 20,000 email sends included, then $1.50 per 1,000) · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official MCP server in open beta (Smithery-hosted), 34 tools incl. sending email/push/SMS
- Best for
- Product teams wanting push, email, and SMS in one platform
- Website
- https://onesignal.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?
OneSignal suits product teams wanting push, email, and sms in one platform. 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 OneSignal alternatives, Substack alternatives, or the full table.