Mailgun vs Mailchimp: Which Should You Use in 2026?
Mailgun and Mailchimp both send email, but they solve different problems. This comparison breaks down transactional email API vs marketing campaign tools, pricing, and when to use each.
Updated 2026-09 · 2026
Mailgun
Email API and SMTP service built for developers
Strengths
- +Developer-first API and SMTP relay for transactional email
- +Strong deliverability tools including inbox placement testing
- +Detailed logs, bounce/complaint tracking, and webhooks
Weaknesses
- -No drag-and-drop campaign builder or marketing tools
- -Contact/list management is minimal, not built for segmentation
- -Requires engineering time to integrate and maintain
Best for
Developers and product teams sending transactional emails (password resets, order confirmations, alerts) from within an app.
Mailchimp
Marketing platform for email campaigns and automation
Strengths
- +Free plan for up to 500 contacts and 1,000 sends/month
- +Drag-and-drop email builder with 100+ templates
- +Built-in audience segmentation and CRM-style contact management
Weaknesses
- -Pricing climbs fast as your contact list grows
- -Transactional email requires a separate add-on (Mandrill) with its own cost
- -Less granular control over deliverability infrastructure than a dedicated ESP API
Best for
Marketers and small businesses running newsletters, promotions, and automated campaigns without writing code.
Feature Comparison
| Feature | ||
|---|---|---|
| Free tier | 3-month trial, 100 emails/day (Flex) | Yes — 500 contacts, 1,000 sends/month |
| Transactional email API | Yes, core product | Add-on via Mandrill (extra cost) |
| Marketing campaign builder | No | Yes, drag-and-drop editor |
| SMTP relay | Yes | Yes |
| Email templates | Basic HTML only | 100+ pre-built templates |
| Marketing automation | Limited, built via API/webhooks | Visual automation builder included |
| Analytics & reporting | Detailed send logs, opens, clicks, bounces | Campaign reports, A/B testing, audience insights |
| Deliverability tools | Inbox placement testing, dedicated IPs | Domain authentication, basic deliverability reports |
| Contact/list management | Minimal, recipient lists via API | Full audience segmentation and tagging |
| Integrations | Zapier, webhooks, dev SDKs (Node, Python, PHP) | 300+ native integrations (Shopify, WordPress, Salesforce) |
| Pricing model | Pay per email volume sent | Pay per contact count |
The Verdict
Mailgun and Mailchimp aren't really competitors — Mailgun is infrastructure for developers sending triggered emails, Mailchimp is a marketing platform for people who don't want to write code. If you're sending newsletters and promotions, Mailchimp wins outright. If you're sending password resets and order confirmations from your app, stick with Mailgun (or a similar transactional API) and don't force Mailchimp into that role.
How to switch from Mailgun to Mailchimp
- 1Export your suppression list (bounces, unsubscribes, complaints) from Mailgun via Dashboard > Sending > Suppressions, or pull it as CSV through the Suppressions API — Mailgun has no marketing contact list to export since it's transactional-only.
- 2Clean and import that list into Mailchimp under Audience > Import Contacts, mapping fields (email, name, status) to Mailchimp's audience schema.
- 3Decide what happens to transactional sends: keep Mailgun running for password resets/receipts, or migrate those to Mailchimp Transactional (Mandrill) if you want everything under one vendor.
- 4Rebuild your email templates in Mailchimp's drag-and-drop editor — Mailgun's HTML/API templates don't transfer directly.
- 5Add Mailchimp's SPF/DKIM records to your DNS alongside (or instead of) Mailgun's, and verify your sending domain in Mailchimp's Domain Authentication settings.
- 6Send a small test campaign, confirm deliverability and open/click tracking work, then fully cut over marketing sends to Mailchimp while keeping Mailgun only for any remaining transactional API calls.
Mailgun vs Mailchimp: common questions
How do I export my data from Mailgun before switching?+
Mailgun doesn't store marketing-style contact lists — you'll export your suppression list (bounces, complaints, unsubscribes) via Dashboard > Sending > Suppressions, or pull it as CSV/JSON through the Suppressions API. You can also export send logs from Sending > Logs as CSV if you need historical delivery data for reference.
What features will I lose moving from Mailgun to Mailchimp?+
You lose granular deliverability controls like dedicated IPs, inbox placement testing, and raw SMTP/API access for triggered sends. If you still need transactional email (password resets, receipts), you'll either keep Mailgun running alongside Mailchimp or pay extra for Mailchimp Transactional (Mandrill).
Is Mailchimp's free plan enough for a small team's needs?+
It's enough for very early-stage newsletters — 500 contacts and 1,000 sends/month covers a small pilot list. Once you pass that, you'll hit paywalls quickly since Mailchimp's pricing scales with contact count, not just sends.
Does Mailchimp support the same integrations as Mailgun?+
No — they serve different purposes. Mailgun integrates with your codebase via SDKs and webhooks for sending emails programmatically. Mailchimp integrates with e-commerce and CMS platforms (Shopify, WordPress, Salesforce) for marketing workflows, not application-level email sending.
Will switching from Mailgun to Mailchimp save money long-term?+
It depends on your use case, not just the tool. For transactional email at volume, Mailgun's pay-per-email pricing is usually cheaper than routing the same emails through Mailchimp Transactional. Mailchimp only saves money if you're consolidating marketing tools you'd otherwise pay for separately (CRM, landing pages, automation).