
Resend
Customer.io
Mailmodo
Postmark
MailerLite
Mailgun
MailChimp
We bought a billboard in Times Square and we're letting you advertise your startup on it!It's free.

Customer.io
AppFlows
Drip
Ortto
Lifecycle email automation your AI agent runs over MCP. Send app events through a REST API and manage flows, segments and campaigns from your agent.

Which is more popular?
Based on our record, Loops.so seems to be more popular. It has been mentioned 10 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | loops.so | rngmstr.dev |
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In their own words, as submitted to SaaSHub.


No description of Loops.so yet.
Ringmaster is lifecycle email automation built for apps and AI agents. Your app sends events through a REST API, and your agent manages flows, segments and campaigns over MCP from clients such as Claude, ChatGPT, Claude Code and Cursor. Ringmaster schedules each step for the recipient’s daytime,...
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Loops.so and Ringmaster.dev. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Start-here: Transactional + newsletter → Resend (3,000/mo, 100/day, 3 domains on Free). Staging inbox → Mailtrap sandbox (tiny on Free). Marketing audience → Loops. OTP texts → Twilio after trial credit. - Source: dev.to / 24 days ago
I thought this would be easy using any of the email marketing tools out there like Resend or Loops, but this was not the case. All of the available tools shockingly handle campaigns at a user instead of organization level. - Source: dev.to / 10 months ago
Previously, I used Loops.so to send out newsletters. However, it involved the tedious task of reformatting the blog post within their campaign editor and re-uploading all media. - Source: dev.to / about 2 years ago
Tracking Ringmaster.dev since Nov 2026.
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