Overview

MailSlurp and Loops are both developer-friendly email tools, but for different purposes. MailSlurp creates programmable test inboxes for CI/CD testing. Loops is a modern email platform built specifically for SaaS companies with event-based automation and a beautiful interface. See our MailSlurp comparison and Loops comparison.

Both appeal to technical teams, but at different stages. MailSlurp verifies your email flows work in development. Loops sends those emails to real users in production.

Pricing Comparison

For SaaS teams:

• MailSlurp: Free (200 inbound), Starter $19/mo, Team $207/mo
• Loops: Free (1k contacts), Basic $49/mo (5k contacts)
• Sequenzy: $49/mo for 10k subscribers, 300k emails, all features. See pricing

At $49/mo, Sequenzy offers 2x the contacts that Loops does with Stripe integration included.

Where MailSlurp Wins

Programmable test inboxes

Create email addresses on-demand for automated testing. Verify your SaaS onboarding emails, password resets, and notification flows work correctly before they hit production.

SDK breadth

18+ SDKs vs Loops' Node.js and Python. If your backend is Go, Java, C#, or another language, MailSlurp has official SDK support.

CI/CD-first design

MailSlurp's entire architecture serves automated testing. Every API endpoint and feature is designed for programmatic email verification in CI/CD pipelines.

Enterprise testing compliance

SOC 2 Type I compliance for enterprise teams with strict security requirements around their testing tools.

Where Loops Wins

Beautiful SaaS email platform

Loops is known for its stunning UX. The interface is clean, modern, and a genuine pleasure to use. For product teams who care about tool aesthetics, Loops stands out.

Event-based automation

Purpose-built for SaaS with event triggers, user properties, and product-focused workflow design. Send emails based on what users do in your product.

Marketing + transactional

Loops handles both marketing campaigns and transactional email from one platform. MailSlurp does neither.

Modern approach

Loops takes a fresh approach to email marketing, stripping away legacy complexity. It's designed for how modern SaaS teams work, not how enterprise marketing teams worked a decade ago.

Why Sequenzy Beats Both for SaaS

Sequenzy combines the best of both worlds:

Double the contacts at the same price

Loops: 5k contacts for $49/mo. Sequenzy: 10k contacts for $49/mo. Same price, twice the capacity. As your SaaS grows, this difference compounds.

Native Stripe integration

Stripe integration is the feature that separates SaaS email from generic email. Subscription events automatically trigger the right emails — trial expiration, payment failure, plan upgrade. Loops doesn't have this natively.

AI does the heavy lifting

Describe what your onboarding flow should achieve and Sequenzy creates the entire email sequence. No manual workflow building required.

300k emails included

That's a lot of email for $49/mo. Marketing campaigns, transactional messages, and automated sequences — all within the included volume.

Test with MailSlurp, send with Sequenzy

Use MailSlurp in your CI/CD pipeline to verify email flows. Use Sequenzy in production to send those emails to real subscribers. The complete SaaS email stack.