Connect Customer.io to Mailgun
Automate workflows between Customer.io and Mailgun. No coding required.
The most-used recipe
Customer.io
Marketing
DeskFerry agent
Add subscriber when new subscriber
Runs on its own
Mailgun
Marketing
Popular workflows
What you can automate between Customer.io and Mailgun
These are the most popular automations teams set up between Customer.io and Mailgun. Each one runs automatically once activated — no manual steps.
Add subscriber when new subscriber
Add someone to your mailing list automatically when someone joins your mailing list.
Add subscriber when new subscriber
Add someone to your mailing list automatically when someone joins your mailing list.
Sync Customer.io changes to Mailgun
Keep Mailgun updated when a recipient opens your email.
How data flows
What syncs between Customer.io and Mailgun
When an event occurs in Customer.io, the relevant data is automatically sent to Mailgun. DeskFerry maps the fields between both apps so the data arrives in the right format — no manual formatting or exports required.
Data from Customer.io
- Campaign data
- Subscriber lists
- Email opens / clicks
- Audience segments
- Tags
Data from Mailgun
- Campaign data
- Subscriber lists
- Email opens / clicks
- Audience segments
- Tags
Step-by-step guide
How to connect Customer.io to Mailgun
Follow these steps to set up your integration. The entire process takes under 5 minutes.
What you'll need
- An active Customer.io account
- An active Mailgun account
- A free DeskFerry account (sign up takes 30 seconds)
- Step 01
Create your DeskFerry account
Sign up at deskferry.app — it takes 30 seconds and starts a 7-day free trial. You'll land on the dashboard where you can create your first workflow.
- Step 02
Authenticate Customer.io
Click "Add Connection" and select Customer.io from the app directory. You'll be redirected to Customer.io's authorization page. Grant DeskFerry access to your campaigns, audiences, and analytics data. You control which lists and campaigns the integration can modify.
- Step 03
Authenticate Mailgun
Same process for Mailgun. Click "Add Connection," select Mailgun, and authorize access. Grant DeskFerry access to your campaigns, audiences, and analytics data. You control which lists and campaigns the integration can modify.
- Step 04
Choose your trigger
Select what event starts the workflow. For this integration, popular triggers include: new subscriber in customer.io or new subscriber in mailgun. The trigger fires automatically whenever that event happens — no manual intervention.
- Step 05
Configure the action
Define what happens when the trigger fires. For example: add subscriber in mailgun. Map the data fields between Customer.io and Mailgun so the right information lands in the right place.
- Step 06
Test and activate
Run a test to confirm data flows correctly between Customer.io and Mailgun. Check that the fields map as expected, then toggle the workflow on. It runs 24/7 from here — DeskFerry handles retries, error logging, and monitoring automatically.
Benefits
Why connect Customer.io and Mailgun?
Manually moving data between Customer.io and Mailgun is error-prone and eats into your team's productive hours. Connecting them through DeskFerry eliminates that overhead — events in one app trigger actions in the other automatically.
Tips
Tips for your Customer.io + Mailgun integration
Get more out of this integration with these best practices.
Use cases
Who uses the Customer.io + Mailgun integration?
Teams across industries connect Customer.io and Mailgun to streamline their workflows.
Marketing managers running campaigns who need Customer.io and Mailgun in sync
Content marketing consolidating their marketing stack
Content creators managing workflows eliminating duplicate work across platforms
FAQ
Frequently asked questions
How do I connect Customer.io to Mailgun?
Sign up for a free DeskFerry account, then click "Add Connection" to authenticate both Customer.io and Mailgun via OAuth. Choose a workflow template — like syncing marketing events to marketing actions — customize the field mapping, and activate. The entire setup takes under 5 minutes.
What can I automate between Customer.io and Mailgun?
You can automate a wide range of workflows: sync new Customer.io events to Mailgun actions, trigger Mailgun updates when Customer.io data changes, create Mailgun records from Customer.io events, and build conditional workflows with filters and field mapping. Each workflow runs 24/7 with automatic retries.
Is the Customer.io and Mailgun integration free?
DeskFerry's 7-day free trial is enough to prove the workflow out. If your Customer.io-to-Mailgun workflows need more volume, paid plans start at $49/month with unlimited workflows and priority execution.
Is my Customer.io data secure when connected to Mailgun?
Yes. DeskFerry uses OAuth 2.0 for authentication — we never store your Customer.io or Mailgun passwords. All data is encrypted in transit (TLS 1.3) and at rest (AES-256). Your marketing data is only accessed when a workflow runs, and you can revoke access at any time from your DeskFerry dashboard.
Can I sync data both ways between Customer.io and Mailgun?
Yes. You can set up workflows that trigger from either Customer.io or Mailgun. For example, create a workflow where Customer.io events update Mailgun, and a separate one where Mailgun changes sync back to Customer.io. Each direction is configured independently so you have full control.
Do I need technical skills to connect Customer.io and Mailgun?
No coding is required. DeskFerry's builder is prompt-based: you describe the trigger and what should happen in plain English, and the agent handles the field mapping. If you can use Customer.io and Mailgun, you can set up the integration. Most users are running their first workflow within 10 minutes.
Automate Customer.io + Mailgun
7-day free trial. Works with the tools you already use.