Launch waitlists
Ask for an email, a size and which colorway they are waiting for, one question at a time. Everyone lands on the launch list in Klaviyo, and the answers tell the buying team what to reorder.
Waitlist and registration forms LiveFree on every plan
Klaviyo forms that add every respondent to your list
Klaviyo's own sign-up forms are built to catch an email on your storefront. Upform is for the longer asks: a waitlist with a few qualifying questions, a back-in-stock request, a post-purchase survey. Connect your own Klaviyo account once, pick a list, and every submitted response subscribes that person, with their email, name and phone on the profile. It costs nothing on the free plan.
The short answer
To send a form to Klaviyo with Upform, open the form's Connect panel, click Connect Klaviyo and authorize your own account in the pop-up. Choose a list, map one question to Email (required) and, if the form asks for them, to First name, Last name and Phone. Click Enable for this form, send a test profile, and publish. From then on every submitted response subscribes that person to the list. The integration, all 21 question types and unlimited responses are on the free plan.
1
Klaviyo list per form
4
Profile fields to map
∞
Responses, free plan
$0
Cost of the integration
Being straight with you
Upform vs Klaviyo's built-in sign-up forms
Klaviyo already ships forms, and for storefront capture they are hard to beat. Upform does a different job: it asks the questions a popup cannot, then hands the person to Klaviyo. Here is where each one is ahead.
| Feature |  Upform | Klaviyo sign-up forms |
|---|---|---|
| Built for | Longer asks: waitlists, requests and surveys, one question per screen | Fast email and SMS capture on your storefront |
| Formats | Public link, iframe embed or email snippet | Popup, flyout, full page and embed |
| Question types | 21, including picture choice, star rating, slider and file upload | Fields built around profile data and consent |
| Logic | 20 operators and four actions: show, hide, jump, end form | Multi-step forms, a few questions per step |
| On-site targeting and timing | Not available: Upform has no popups or display rules | Built in |
| A/B testing | Not available | Up to seven variations per test |
| SMS consent | No SMS consent step: Phone is mapped as a profile field | Collects consent for email and SMS |
| Every answer, with drop-off | Responses table, CSV export and a per-question drop-off funnel | Form analytics, with per-step engagement on multi-step forms |
| Cost | $0 for the integration on the free plan | Included with your Klaviyo account |
Klaviyo's sign-up form features checked September 2026 in the Klaviyo Help Center; Upform's on our own pricing page. Products change, so verify both before you decide.
How it works
Connect a form to Klaviyo in five steps
No private API key to paste, no Zap in the middle and no per-task bill. The whole setup lives in the Connect panel of the form you already built.
Connect your Klaviyo account
Open the form, go to the Connect panel and click Connect Klaviyo. A pop-up asks you to authorize Upform against your own Klaviyo account over OAuth. If nothing opens, allow pop-ups for Upform and click again.
Choose the list
Upform loads the lists in your account. Pick the one this form feeds: a launch waitlist, a restock list, a feedback panel. Each form subscribes people to one list.
Map questions to profile fields
Point a question at Email, which is required, and optionally at First name, Last name and Phone. Upform pre-fills a best guess from your email question and from question titles that look like names or phone numbers, so most forms only need a glance.
Decide on the submission event
Leave the Track “Upform Submission” event switch on to send a custom event with all answers to the profile. Turn it off if the list subscription is all you need.
Enable, test, publish
Click Enable for this form, then Send test to push a test profile into your Klaviyo before anyone real fills it in. Publish on the public link or as an embed, and every submitted response joins the list.
Connect · Klaviyo
Klaviyoteam@northgate.ioConnectedKlaviyo List
Autumn drop waitlist
Map form questions to Klaviyo Profile fields
Email (required)
What's your email?
First name
First name
Last name
Last name
Phone
Not mapped
Track “Upform Submission” eventSends a custom event with all answers to the profile.
Save changesSend test
Form syncActive
Last sync 9/29/2026, 9:41 AM
- Per-user OAuth: your Klaviyo account, your lists
- Pause with the Active switch, or remove Klaviyo from one form
- Last sync time and any error shown right in the panel
The result
What lands in Klaviyo when someone submits
On the left, what the respondent sees. On the right, the profile waiting in your Klaviyo account, already on the list.
4 →
Where should we send your early access invite?
One email when the drop goes live. Nothing else.
maya@northgate.io
Next →press Enter ↵
An email question, one of 21 types, free on every plan.
Klaviyo · Profile
Emailmaya@northgate.io
First nameMaya
Last nameOkonkwo
Phone+44 7700 900461
ListAutumn drop waitlist
Latest eventUpform Submission
Example profile. Four questions mapped, one list joined, and the full set of answers carried on the event.
The mapping
Which question fills which Klaviyo profile field
There are four profile fields to fill, and Upform's question types line up with them. You confirm each pair once, per form.
| Klaviyo profile field | Upform question to map | What arrives |
|---|---|---|
| Email (required) | An Email question, which validates the address | maya@northgate.io. The connection will not save until this is mapped. |
| First name | A Short Text question titled First name | Maya |
| Last name | A Short Text question titled Last name | Okonkwo |
| Phone | A Phone Number question, with its country flag and dial code picker | +44 7700 900461 |
| Everything else | Any other question in the form | Stays in Upform, and travels on the “Upform Submission” event when that switch is on |
One thing to plan for: Upform's Full Name question collects a name on a single line, while Klaviyo keeps first and last name apart. If you want both fields filled cleanly, ask them as two Short Text questions. Every answer, mapped or not, also stays in Upform's responses table, and the respondent shows up in the Contacts directory.
Use it with
Three forms worth wiring to a Klaviyo list
A list is only as useful as what you know about the people on it.
Back-in-stock requests
A picture choice question shows the sold-out products, a dropdown takes the size, and the email subscribes them to the restock list. With the event switch on, their picks sit on the profile too.
All 21 question typesPost-purchase surveys
A star rating and one open question after delivery. Customers who answer join a feedback list you can thank properly, and the drop-off funnel shows which question lost the rest.
Customer feedback formsCame here looking for a Typeform Klaviyo integration or a way to run Klaviyo surveys? Upform connects to Klaviyo natively, on the free plan, with no cap on responses. The free Typeform alternative page covers the rest of the switch.
Honest limits
What the Klaviyo connection does not do
Better to know now than after the launch email has gone out.
- One list per form. You can repoint it at any time; to reach a second list, send the response through a webhook to an automation of your own.
- No tags and no double opt-in switch in the Klaviyo panel (Upform's Mailchimp connection has both). Check how your list is set up in Klaviyo before you publish.
- No SMS consent step. Phone is mapped as a profile field and the panel has no consent option for texts, so collect SMS consent in Klaviyo before you text anyone.
- No filter by answer. The panel has no rule that holds a response back, so treat every connected form as a signup form.
- Upform does not email the people on your list. Welcome messages and flows are built in Klaviyo.
Put the promise on the form
Because every submission joins the list, say what people are signing up for before they type their address. A Statement screen or the help text under the email question can spell out what you will send and how often. Make the email question required so every response arrives with one, and use conditional logic to show each person only the questions that apply to them.
- Only submitted responses are sent, so people who leave halfway never reach your list
- Removing Klaviyo from one form leaves your other forms connected
- Disconnecting the account itself stops syncing on every form that used it
- Public submissions are protected by invisible reCAPTCHA v3, which helps keep bots off the list
Beyond the list
Run it alongside the rest of your stack
Destinations stack on one form, so one submission can join the Klaviyo list, create a CRM contact and add a spreadsheet row, all on the free plan.
HubSpotCreates or updates the contact on submit
Google SheetsAppends one row per response
WebhooksThe whole response as JSON, to any endpoint you ownEvery destination connects with your own account. Post new signups to a channel with Slack, or browse the full integrations directory.
Frequently asked questions
Should I use Upform or Klaviyo's own sign-up forms?
Use Klaviyo's sign-up forms for a popup, flyout or embed that catches an email on your storefront, with display rules and A/B tests built in. Use Upform when the form has more to ask: a waitlist with qualifying questions, a back-in-stock request, a post-purchase survey, one question per screen with branching logic. Plenty of stores run both, with Klaviyo on the storefront and Upform on the longer forms.
Which Klaviyo account does Upform connect to?
Yours. The connection is per-user OAuth: you authorize Upform against your own Klaviyo account in a pop-up, and the list picker shows the lists in that account. There is no private API key to paste and no shared service account. Disconnect whenever you like and your forms keep collecting responses in Upform. They simply stop reaching Klaviyo.
Which Klaviyo profile fields can I map?
Four: Email, First name, Last name and Phone. Email is required, and the connection will not save until a question is mapped to it and a list is selected. Upform pre-fills a guess from your email question and from question titles that look like names or phone numbers, and you can change any pair before you enable it.
Can Klaviyo see the answers I did not map?
Yes, if you leave the Track “Upform Submission” event switch on. It sends a custom event with all answers to the profile, so the full response sits in Klaviyo next to the person who gave it. Every answer also stays in Upform, in the responses table with search, filters and CSV export.
Do I need a paid plan for the Klaviyo integration?
No. Every integration is included on the free plan, which is $0 forever and comes with unlimited forms, unlimited responses, all 21 question types and conditional logic. Pro is $12 a month and adds unlimited file storage, removes Upform branding and allows up to five team members. Online checkout is not live yet, so Pro accounts are set up manually and the team replies the same day.
What happens to incomplete responses?
Nothing reaches Klaviyo. The subscription happens when a response is submitted, so someone who opens the form and leaves at question three is never added to your list. They are still counted in Upform analytics as an incomplete, and the per-question drop-off funnel shows the exact question they stopped on.
Get started
Ask the better question. Let Klaviyo send the email.
Start from a template, connect your own Klaviyo account, and every respondent joins the list you picked while the answers stay in Upform.
No credit card. Unlimited forms and responses on the free plan.