Two transactional email providers, compared on price, features and ratings, so you can pick fast.
Updated October 2026
THE VERDICT
Mailgun wins on developer experience and sending APIs. OneSignal Email wins on editor tools and support.
Mailgun starts at $0.80 versus OneSignal Email's Free. OneSignal Email rates higher with developers (4.7 vs 4.5 on G2). Pick based on volume and team, and the scorecard below breaks down where each one leads.
Winner cells are tinted, green where Mailgun leads, violet where OneSignal Email does.
FAQ
Mailgun starts at $0.80 versus OneSignal Email's Free. Because pricing models differ by tier, the cheaper option depends on your monthly volume, so compare the pricing rows in the scorecard above.
Mailgun's paid plans start at $15 per month for the Basic plan, which includes 10,000 emails per month with no daily sending limits. The Foundation plan is $35 per month for 50,000 emails, and the Scale plan is $90 per month for 100,000 emails. Additional emails beyond plan limits are billed as overages per 1,000 sends, and Enterprise pricing is custom.
Yes. OneSignal's Free plan includes 10,000 email sends per month at no cost. This sits alongside its free push notification allowances, so email is bundled into the same free platform tier.
Yes. Many teams route different message types through different providers or fail over between them. Courier lets you send through both behind a single API and switch providers without changing your code.
Why not both?
Use both behind one API.
Route Mailgun, OneSignal Email, or both, and switch providers without changing your code. Courier sits in front of every channel.
Pricing, plans and feature availability as of October 2026 and may change. Ratings are aggregated from public review platforms. Mailgun is a Sinch product.