The best lead generation form builders in 2026, compared on evidence

We did not run ad campaigns through all ten products and have no conversion-rate data for them. We read each vendor's pricing and help pages on 28 September 2026 and checked five things. Where a vendor page did not say, the table says "not listed" instead of guessing.

1. Hidden fields and UTM capture: can the form store utm_source, utm_campaign and similar URL parameters with each lead, and on which plan? Without this you cannot tell which ad or email paid for the lead.

2. CRM integration: is there a native push to HubSpot, Salesforce or Pipedrive, or do you need Zapier or a webhook in between?

3. Conditional logic: can you ask qualifying questions and branch, so a small inquiry and a large one take different paths?

4. Partial responses: does the tool keep answers from people who start and leave? For lead gen, an email typed into step one is often worth a follow-up.

5. Cost for 1,000 leads a month: the cheapest plan, billed annually, that accepts 1,000 responses a month. We rank on all five together, so a cheap tool missing CRM sync can sit below a pricier one that has it.

The order reflects all five criteria for a typical small sales or service team: a few hundred to a few thousand leads a month and one CRM. Each entry lists what it does well and what would make you skip it.

Fillout's free plan covers four of our five criteria at $0: 1,000 responses a month, pre-fill and hidden fields, conditional logic, and a HubSpot integration, with unlimited seats. Payments and scheduling are also free. Starter is $15 a month on annual billing and Pro, which removes branding, is $40.

Cons: partial submissions only arrive on Business at $75 a month, and Salesforce is reserved for Team and Enterprise plans. The free plan shows a Fillout badge.

If your pipeline lives in HubSpot, its own forms write straight into contact records with no sync step to break. The free tools include standalone, embedded and collected forms for up to two users. Marketing Hub Starter, from $20 a month per seat, removes HubSpot branding and adds multi-step forms.

Cons: conditional logic on forms starts at Marketing Hub Professional, from $890 a month. HubSpot's catalog caps free accounts at 1,000 contacts, so a busy form outgrows free quickly. Outside HubSpot, it is the wrong tool.

Tally's free plan has no response cap within its fair-use policy, and hidden fields, logic, calculations and Stripe payments are all free. For a team running many campaigns with no budget, nothing else on this list takes as many leads for nothing.

Cons: we found no native HubSpot or Salesforce integration on its pricing page; leads reach a CRM through Zapier, Make or webhooks. Partial submissions, branding removal and team members need Pro at $24 a month, or $240 a year.

Zunoform saves partial responses as the respondent moves through the form, on every plan including Free, and captures hidden fields and UTM parameters from the URL. Those values appear on the response and in CSV exports, and go out as extra columns in Google Sheets and as a hidden object in Zapier and webhook payloads. The native HubSpot integration does not map them to contact properties, so to get UTMs onto HubSpot contacts, route leads through Zapier or a webhook. Conditional logic, calculated variables and answer piping are free too. Pro at $14.99 a month adds 5,000 responses, the HubSpot, Mailchimp and Airtable integrations, and branding removal.

Cons: the free plan is 500 responses a month, not unlimited, so 1,000 leads means paying. There is no native Salesforce or Pipedrive connection; you would use a Zapier catch-hook URL or a webhook. Free plans send notification emails only through your own SMTP server, and there is no built-in spam protection.

Typeform has spent a decade on the one-question-at-a-time format, and its pricing page lists native HubSpot, Salesforce and Pipedrive connections alongside its large integration catalog. Hidden fields and logic are available on every plan.

Cons: the free plan is 10 responses a month. 1,000 responses needs Plus at $56 a month billed annually. Partial responses on forms that use logic or scoring need a Growth plan, from $266 a month.

Jotform suits teams that want a ready-made form for almost any industry and a long list of payment gateways, with no Jotform transaction fee. Bronze, at $34 a month on annual billing, takes 1,000 submissions a month and removes branding.

Cons: the free Starter plan allows 5 forms and 100 submissions a month. Jotform's own FAQ calls Enterprise its only multi-user plan. It only keeps incomplete submissions when the respondent chooses Save and Continue Later, so passive drop-off capture is not what you get.

Heyflow is built for multi-step ad funnels: URL parameters, native CRM integrations, GA4, Tag Manager and Google Ads tracking are in its core bundle on every plan.

Cons: there is no free plan, only a 14-day trial, and pricing is per response. Starter is $49 a month for 50 responses; 1,000 responses a month means Scale at $249, on the monthly prices shown. Partial response capture is not listed on its pricing page.

involve.me builds funnels, calculators and quizzes that score and route people, with no listed response cap on paid plans. Grow at $69 a month on annual billing adds UTM passing, hidden fields, HubSpot and branding removal.

Cons: the entry Start plan lacks UTM tracking and CRM integrations, which rules it out for this job. Partial submissions and Salesforce need Scale at $139. Plans limit live funnels (3, 5 or 25), and the free tier stops at 50 submissions or 500 visits a month.

Paperform's editor produces pages that look designed, and it takes payments with no Paperform fee on every plan. Pro, at $49 a month on annual billing, has unlimited submissions and unlimited users, plus hidden fields and partial submissions.

Cons: the free plan is 30 submissions a month and has no hidden fields, so you cannot track campaigns without paying.

Formester's free plan lists unlimited forms and responses, and its pricing page lists UTM tracking through hidden fields plus HubSpot and Salesforce integrations.

Cons: conditional logic starts on Personal at $12 a month on annual billing, and partial submissions on Business at $45. The pricing page does not say which plan includes each CRM integration, so test it before you commit.

Worked example, as an illustration: an agency gets about 1,000 form leads a month from ads, wants each lead's campaign recorded, and wants leads in HubSpot. Using the prices above, the monthly cost of the cheapest plan that does all three natively is: Fillout $0, Zunoform $14.99 ($12.50 on annual billing), Jotform $34, Typeform $56, involve.me $69 and Heyflow $249. HubSpot Forms is free for the first 1,000 contacts, then you are on paid HubSpot contact tiers.

Add partial responses to the requirement and the order changes: Zunoform stays at $14.99, Typeform needs Growth if the form uses logic, Fillout moves to $75 and involve.me to $139. Which requirement you drop is the real decision, not the logo.

Yes, if you spend money on more than one channel. A hidden field reads a value such as utm_campaign=spring-webinar from the page URL and stores it with the lead, without the visitor seeing it. Without it, your CRM shows a lead but not the ad, email or partner that produced it, and you cannot compare cost per lead across channels.

Build tagged links with our UTM builder, and if the form is embedded, check the parameters pass through the embed. Our guide to capturing UTM parameters in forms covers the setup.

A multi-step lead form often asks for an email on the first screen and qualifying details later. If someone leaves on step three, a tool that keeps partial responses still holds a name and email you can follow up with, subject to your privacy notice and consent rules. A tool without it records nothing.

On this list, only Zunoform includes automatic partial capture on its free plan (Jotform keeps drafts only when the respondent chooses to save). Tally and Paperform put it on their first paid plan; Fillout, Formester and involve.me put it on a higher tier. Before relying on partial data for outreach, check your consent wording: someone who abandoned a form did not click submit.