Connect Fluent Forms to Brevo
Connect Fluent Forms to Brevo and every form submission becomes a contact in the Brevo list you choose. The free ClickSyncr for Brevo plugin adds a native Fluent Forms integration with per-form feeds: connect your API key once, pick a list, map your fields, save. So there is no code, and it takes about two minutes per form.
Before you begin
You need three things: the ClickSyncr for Brevo plugin activated, Fluent Forms active, and a Brevo account with permission to create an API key. You store the key once, and every supported builder on the site then shares it.
Get your Brevo API key
- Log in to Brevo and go to Settings → SMTP & API → API Keys.
- Generate a new v3 API key and give it a recognisable name such as
WordPress ClickSyncr. - Copy it and paste it into any ClickSyncr Brevo panel. One key serves the whole site.
Treat the key like a password. Anyone holding it can read and modify your Brevo lists and contacts.
Fluent Forms setup, step by step
- Connect Brevo in the global integrations. From Fluent Forms → Integrations, find ClickSyncr Brevo and paste your API key. You connect once for the whole site.
- Add a Brevo feed to your form. Also, edit the form, open Settings & Integrations → Marketing & CRM Integrations, and add a ClickSyncr Brevo feed.
- Choose the Brevo list. In fact, the dropdown lists every list in your account with its contact count, so you can tell them apart at a glance.
- Map your form fields. Then Email is the required mapping; every other row targets one of your Brevo contact attributes, such as FIRSTNAME, LASTNAME or SMS, loaded with their types once the key connects.
- Optional: set a consent field. Also, choose a checkbox, acceptance or radio field to drive opt-in. Ticked adds the contact right away; unticked sends Brevo’s double opt-in confirmation email instead, so the contact only joins the list after confirming.
- Save the feed. In addition, every new submission now syncs to Brevo.
Typed attributes, mapped safely
Brevo identifies contacts by email, so Email is the one required mapping. Every other row maps to your account’s contact attributes, such as FIRSTNAME, LASTNAME, SMS and any custom attributes you have created, and ClickSyncr loads them with their types once the key connects. ClickSyncr converts values to each attribute’s real type: a number field arrives in Brevo as a number, a checkbox as true or false, not as text. Also, ClickSyncr simply skips an unmapped field and never overwrites existing contact data with a blank value. If a visitor types an invalid phone number, ClickSyncr drops only that field and still syncs the contact.
Contact status and double opt-in
Each form chooses how contacts arrive: added right away (the Brevo default), or confirmation email, which uses Brevo’s double opt-in so the contact only joins the list after clicking the confirmation link. The confirmation path needs a double opt-in template in your Brevo account. A consent field overrides it per submission: ticked adds right away, unticked sends the confirmation email. Brevo matches contacts by email, so it updates existing contacts instead of duplicating them.
Verify the sync
First, submit the form on the front end (not the admin preview) with a test address you can recognise, filling every mapped field. Then, in Brevo, open Contacts and confirm the contact exists, sits in the list you selected, and carries the mapped attribute values with their proper types. In short, that one minute catches almost every configuration mistake.
Troubleshooting
| Symptom | Cause and fix |
|---|---|
| The list dropdown is empty | The key is missing or mistyped, or you revoked it in Brevo. Re-paste the v3 key and reconnect. A key with a trailing space is the classic culprit. |
| Submissions do not appear in Brevo | Nine times out of ten the Email field is not mapped. It is the one required mapping. Fix it, then submit a fresh test. |
| A new list or attribute is not listed | The catalog is cached briefly. Use the refresh control in the Fluent Forms settings. |
| The contact syncs but an attribute is empty | Either that attribute is unmapped, it was blank on the submission, or the value was an invalid phone number, which drops on its own, so the contact still arrives. Empty values never wipe existing Brevo data. |
| No confirmation email arrives | The form uses the confirmation-email status but your Brevo account has no double opt-in template. Create one in Brevo, or switch the form to add contacts right away. |
Does this work with the free Fluent Forms?
Yes. The ClickSyncr Brevo integration registers in the free Fluent Forms as a native integration module.
Can one Fluent Forms form have multiple feeds?
The integration follows Fluent Forms’ feed model, so each form’s Brevo feed carries its own list and mapping.
Other form builders
ClickSyncr for Brevo also connects Contact Form 7 · WPForms · Gravity Forms · Ninja Forms · Formidable Forms · Forminator. Overview, features and pricing: Brevo integration for WordPress. Browse all ClickSyncr integrations.
“Brevo” is a trademark of Sendinblue SAS. ClickSyncr for Brevo is an independent integration and is not affiliated with, endorsed by, or sponsored by Sendinblue SAS.