Build Fillout Forms Automations with Activepieces (2026)

▶️ Watch the video tutorial on YouTube here.

To build on Fillout (the "build fill out" search), connect your Fillout form to the Activepieces Fillout Forms piece. Its "New form response" trigger starts a workflow the moment someone hits Submit, and you don't write any code. You need a Fillout Forms account and your Fillout API key.

This post covers what Fillout is, the trigger and actions in the Fillout piece, and two step-by-step flows: a Lead Qualifier and an Event Invite Sender. We're excited to welcome Fillout into the Activepieces ecosystem. Together they let you automate more complex processes from form actions, from lead scoring to event invitations.

What is Fillout Forms?

Fillout is a form builder with built-in logic and light automation. You build smart, interactive forms that can trigger other actions.

What makes Fillout stand out is how smooth and professional everything feels. The forms are beautiful, easy to use, and can be customized to match your brand. You can also make the forms smart: show or hide questions based on answers, calculate totals instantly, or send information to different places depending on who fills it out.

See how to get your Fillout API key. If you want to go beyond the built-in actions, the piece includes a Custom API Call action for any other Fillout API endpoint.

What Is Possible With Fillout Forms on Activepieces?

You can explore the Fillout Forms piece in the Fillout Forms integration.

Trigger

• New form response: Triggers when a new response is received for a selected Fillout form

Actions

• Get Form Responses: Fetch all responses for a Fillout form with optional filters
• Find Formed by Title: Finds an existing form by title
• Get Single Response: Retrieves a specific submission from a form
• Custom API Call: Make a custom API call to a specific endpoint

Combine these with any other piece in Activepieces, such as CRMs, email, calendars and AI steps, to turn each submission into an automated workflow.

How to Connect Fillout to Activepieces in 4 Steps

1. Get your Fillout API key. Follow Fillout's REST API guide.
2. Create a flow in your Activepieces account. Activepieces Cloud has a free plan: $0, no card needed, with unlimited flows.
3. Pick the trigger. Choose Fillout Forms, then New form response. Paste your API key and select the form.
4. Add your actions. Send the response to a CRM, validate the email, score it with AI, or notify your team, then test and publish.

The two use cases below show complete flows built this way.

💡 Use Case Spotlight

In this section, you will learn how to build 2 powerful workflows with Fillout and Activepieces

Use Case 1

Lead Qualifier

In this flow, whenever someone fills out a form on Fillout, Perplexity AI is used to search for information about the company that was submitted in the form. After that, you have an AI lead scoring step that rates the company from 1 to 10 to see if it's a good lead. Depending on that score, if it's higher than 4, you'll then have another step with Perplexity AI to get more specific details about the company. Finally, all that information is entered into HubSpot.

Here is the template for this flow: https://cloud.activepieces.com/templates/c2VHnotmEJHaEU28jMrjb

Now let's see how it is built

Prerequisites for this flow

• Fillout Forms account
• Fillout API key: See how to get your Fillout API key here
• Activepieces Account
• Perplexity API

Step 1: Select your Trigger

• Select the New Form Response Trigger from Fillout Forms
• Add your API key and select the form you want to work with

Step 2: Add Perplexity AI

Perplexity AI will help you search for relevant information about the company.

Add your API key, select your preferred model, and type in your prompt.

Step 3: Add AI to Score The Company

To use the Text AI step

• Click on the plus (+) sign below your last step,
• Type Text AI into the search bar, and select Ask AI.

Once you select this AI step, you need to select your provider, model, and add the prompt to help the AI know how to score the company

The prompt that was used in the flow can be found in the template on the Ask AI step

Step 4: Add The Router Step

The router helps the automation to carry out different actions based on certain conditions.

On Branch 1 will check if the result returned from the last step is greater than 4. If it is greater than 4, then it will carry out the next set of actions.

Step 5: Add Perplexity AI

If the company score is greater than 4, Perplexity AI will be used to get more specific information about the company

Step 6:  Create a Company in HubSpot

In this step, all the details from the previous step are used to create a new company data or a new company account in Hubspot

Use Case 2

Event Invite Sender

The flow starts when someone submits a form on Fillout. Then, it validates the email address using ZeroBounce to make sure it's a good email. If the email is valid, the flow adds that person as an attendee for the event and then sends them a personalized invitation email.

Here is the template for this flow: https://cloud.activepieces.com/templates/q7WsD4PFJTrAyNZq3mZvB

Prerequisites for this flow

• Fillout account
• Fillout API key: See how to get your Fillout API key here
• Activepieces Account
• Zerobounce Account and API Key

Step 1: Select your trigger

Select the New Form Response trigger from the Fillout piece. Then, enter your API key and select the form that you want to work with.

Step 2: Validate Email

Select the Validate Email action from ZeroBounce. Then, enter your API key and the email address. This step helps you validate the email addresses of people who fill out the form, so you know whether you should add them to the event.

Step 3: Add Your Router

This step helps you take different actions depending on how valid the email is.

• Branch 1 checks for the email validity. If the email is valid, it will execute the next set of steps on the branch.

Step 4: Add Attendees to the Event

For this step, we're going to use the Add Attendee to Event action from the Google Calendar piece. Once the email has been validated as real and working by ZeroBounce, we want to add that email to the list of attendees for an event on your Google Calendar.

Step 5: Send email

Once we've added the email to the list of attendees on Google Calendar, send them a personalized invitation via email.

This is how easy it is to build powerful workflows with Fillout and Activepieces

Fillout Form Automation FAQ

Does Fillout have an API?

Yes. See how to get your Fillout API key.

Can I use Fillout as a form builder API?

The piece's Custom API Call action lets you call other Fillout endpoints from a flow. The built-in actions cover getting responses, finding a form by title and fetching a single response.

Can I automate event registration with Fillout?

Yes. Use Use Case 2 above: validate the email, add the attendee to a Google Calendar event, and send a personalized invitation.

Do I need to code?

No. Both flows are built from pieces and steps, and each has a ready-made template you can copy.

📌 What’s Next?

• Start building: You can explore the Fillout Forms integration directly in Activepieces.
• Follow us on social for use cases, tutorials, and tips.
• LinkedIn: Fillout | Activepieces
• Twitter:Fillout | Activepieces