Mailchimp integration
Add form subscribers to Mailchimp
Turn newsletter, waitlist or contact form submissions into Mailchimp audience members. FormSubmit upserts the subscriber (so repeats don’t error), fills FNAME/LNAME from name fields, supports double opt-in and can apply tags.
How to connect Mailchimp
- 1
In Mailchimp, go to Profile → Extras → API keys and create a key (it ends with your data centre, e.g. -us21).
- 2
Find your Audience ID under Audience → Settings → Audience name and defaults.
- 3
In FormSubmit, open your form → Integrations → Mailchimp and paste the key and audience ID.
- 4
Optionally set the email field name, enable double opt-in and add tags.
- 5
Send a test, then check the audience for ada@example.com.
What FormSubmit sends
- email_address from your email field
- FNAME / LNAME from first_name/last_name or a single name field
- status subscribed (or pending with double opt-in)
- Tags you configured
You'll need
- API keyencrypted
- Audience ID
- Email field name (optional)
- Double opt-in (optional)
- Tags (comma separated) (optional)
Included on every plan, including Free. Failed deliveries are retried automatically with backoff and every attempt is shown in your delivery log.
Frequently asked questions
Should I use double opt-in?
If you collect subscribers from the EU or want the cleanest list, yes. Mailchimp sends its own confirmation email before adding them.
Related
Mailchimp
Add or update subscribers in a Mailchimp audience from any form.
Newsletter signup generator
Collect email subscribers and sync them to Mailchimp or Kit automatically.
Newsletter signup forms for any site
Add signup forms that subscribe people to Mailchimp or Kit directly — styled exactly like your site.
Connect your forms to Mailchimp in a minute
Sign in with Google, create a form, paste the endpoint. Free forever for small sites — no credit card.