ChatGPT answers, unedited

Yes. Quite a few form/signup platforms support conditional logic, where the answer to one question determines which fields or questions appear next.

For example, you could make a signup flow like:

Are you signing up as:
○ Individual
○ Business

If Individual → ask for age, interests, etc.
If Business → ask for company name, industry, employee count, etc.

My picks:

• Jotform if you want maximum control over individual fields. Its current conditional-logic system explicitly supports showing/hiding fields based on answers. www.jotform.com
• Typeform if the signup experience itself needs to feel sleek and conversational; its branching lets different answers send users down different paths. help.typeform.com
• Fillout if you need more sophisticated rules while keeping the form builder relatively easy to use. www.youtube.com

If by “signup form” you mean an actual account-registration form (creating a username/password and user account), rather than a lead/application form, the list is different. I can narrow it down to software that supports conditional fields and actual user account creation.

Yes. If you mean a signup/registration form where the next fields change based on previous answers, several form builders support this well:

My picks

Tally is probably the first one I'd try if you want something lightweight. Its conditional logic can show/hide individual blocks, skip pages, make fields required conditionally, and send people down different paths. Tally says this conditional logic is available on its free plan. Tally Forms Tally Forms

Jotform is better if you need more sophisticated rules. For example:

Are you signing up as a business or individual?
→ Business → Show Company name, industry, number of employees
→ Individual → Show age, occupation
→ Both → Show common email/phone/address fields

Jotform specifically supports show/hide fields, conditional required fields, page skipping, calculations, and conditional redirects. Jotform Jotform

Typeform is particularly good if the signup needs to feel like a polished onboarding flow rather than a traditional form. Its branching logic can send respondents down different question paths based on their answers. Typeform Help Center Typeform Help Center

If you tell me what your signup form needs to ask and what the different user types/paths are, I can recommend the best software for that exact flow (including whether it can embed into your website and handle account creation).

Yes. If by conditional signup form you mean something like:

“Are you signing up as an individual or a business?”
→ Individual → show personal fields
→ Business → show company name, company size, tax ID, etc.

there are several good options.

My picks

• Best overall: Jotform — probably the safest choice if you need lots of conditional rules. It can show/hide individual fields or groups of fields based on answers. Jotform Jotform
• Best inexpensive/simple option: Tally — especially attractive if you want a clean form and don't want to pay just to use conditional logic. Tally says its conditional logic is free with no limit on the number of conditions. Tally Forms
• Best-looking signup experience: Typeform.
• Best if you're building a sophisticated application/onboarding flow: Fillout or Jotform.

If you tell me what kind of signup you're building (e.g. SaaS registration, membership application, customer onboarding, event signup) and whether you need login/account creation, payments, CRM integration, or a database, I can narrow this down to the 2–3 best choices.

My picks

Yes. What you’re describing is usually called conditional logic, branching, or dynamic fields: e.g. “Are you signing up as a company or individual?” → show different fields depending on the answer.

Good options:

My picks

Tally is probably the first one I'd try. Its conditional logic can show/hide questions, jump between pages, make fields required based on answers, and redirect users. Importantly, Tally says conditional logic is available for free without a limit on the number of conditions. tally.so

Jotform is better if the signup flow is complicated. It supports rules such as:

IF “Account type” = Business → SHOW Company name, Tax ID, Employee count

It can also show/hide multiple fields, skip pages, change the thank-you page, and trigger different emails. www.jotform.com

Typeform is particularly good if you want the signup to feel like a conversational questionnaire rather than a traditional form. Its branching logic can prevent users from ever seeing irrelevant questions. help.typeform.com

HubSpot is the better choice if this is really a lead/signup form tied to a CRM. Its current forms support conditional show/hide of fields and even multi-step form elements, although conditional logic requires a Professional or Enterprise Marketing Hub/Content Hub subscription. knowledge.hubspot.com

If you tell me what kind of signup you're building (SaaS, marketplace, community, job application, onboarding, etc.) and whether you need login/account creation, payments, CRM integration, or just the form, I can narrow this to the best 2–3 options.

Yes. Quite a few form/signup tools support conditional fields—e.g., “Are you signing up as a company or individual?” → show different fields depending on the answer.

My picks:

• Easiest + inexpensive: Tally — its conditional logic is currently available free, with no limit on the number of conditions. tally.so
• Most flexible: Jotform — supports show/hide rules, multiple-field conditions, conditional required fields, and page routing. www.jotform.com
• Best for complicated branching: Cognito Forms — supports conditional fields, sections, pages, and AND/OR logic. www.cognitoforms.com
• Best if this is a marketing/CRM signup: HubSpot — conditional logic can show/hide fields and form steps, although it requires a qualifying paid HubSpot subscription. knowledge.hubspot.com
• Best-looking user experience: Typeform — its branching logic is designed for showing respondents only relevant questions. help.typeform.com

If by “signup form” you mean an actual account-registration flow (create account → ask different profile fields based on answers → save everything to your user database), rather than a generic lead/contact form, the list changes somewhat. I can narrow it down to tools that support real user accounts + conditional onboarding fields.

Yes. If by conditional signup form you mean something like:

“Are you signing up as a company or an individual?”
→ Company → show Company name, size, website
→ Individual → show Job title, interests

there are several good options.

My top picks

1. Jotform — best general-purpose choice
Jotform can show/hide individual fields or groups of fields based on previous answers. You can create rules such as IF “Account type” = Business → SHOW business fields. www.jotform.com
Jotform

2. Tally — best lightweight/affordable option
Tally supports real-time conditional logic, including showing/hiding blocks, skipping pages, routing users down different paths, and conditionally making answers required. Its documentation says conditional logic is available for free. tally.so
Tally

3. Typeform — best UX
Typeform's branching is particularly good when you want the signup experience to feel like a conversational, personalized flow rather than a traditional form. It supports skip logic and conditional branching for more complex flows. help.typeform.com
Typeform

4. Formstack — best for more sophisticated business forms
Formstack can conditionally show/hide individual fields or entire sections, which is useful when an answer should reveal a whole group of additional signup fields. www.formstack.com
Formstack

5. HubSpot — best if signup data needs to go straight into a CRM
HubSpot supports conditional logic that shows/hides fields and entire steps based on responses. The current forms editor supports this on qualifying Marketing Hub/Content Hub plans. knowledge.hubspot.com
HubSpot

If this is specifically for user account signup

There's an important distinction: if you need to actually create an account/user in your application, rather than simply collect information with a form, I'd narrow the choices differently.

For example:

Step 1: What type of user are you?
→ Student
→ Business
→ Nonprofit

Step 2: Based on that answer, collect different fields.

Step 3: Create the user account and store the appropriate profile data.

For that use case, tell me what you're building (e.g. SaaS app, marketplace, community, customer portal, or just a lead/signup form) and I can give you the 3–5 best platforms specifically for that workflow, including pricing and whether they can actually create the user account rather than just submit a form.

Yes. If by conditional signup form you mean:

“Ask what type of user you are → if A, show fields A1/A2; if B, show B1/B2; then submit the appropriate signup information”

there are several good options.

My top picks

1. Jotform — easiest overall

Jotform explicitly supports showing/hiding fields based on previous answers. For example:

“Are you signing up as an individual or a business?”
→ Individual: show name, DOB, personal address
→ Business: show company name, industry, employee count

It can also show/hide multiple fields, skip pages, and change what happens after submission. www.jotform.com

2. Tally — best if you want something lightweight

Tally's conditional logic can show/hide questions or entire blocks, skip pages, make answers conditionally required, and send users down different paths. Importantly, Tally says its conditional logic is available for free without a limit on the number of conditions. tally.so

3. Typeform — best UX

Typeform has branching logic designed specifically for showing respondents only the relevant questions and creating more sophisticated paths through a form. help.typeform.com

4. HubSpot — best if this is actually lead/customer signup

If the form needs to create/update a contact and feed a CRM, HubSpot becomes more interesting. Its multi-step forms can conditionally show or hide entire steps based on the visitor's answers. knowledge.hubspot.com

If this is for a real account signup

There's an important distinction: if you need the form to actually create an authenticated user account—rather than simply collect signup information—I'd narrow the options considerably. Form builders like Jotform/Tally are great for collecting the data, but they aren't necessarily the right underlying authentication/user-registration system.

If you tell me what you're building (e.g. SaaS signup, membership application, customer onboarding, marketplace registration, insurance application, etc.), I can recommend the best 3 options and compare conditional logic + authentication + pricing + integrations.

Yes. Many form/survey tools support conditional logic / branching, where a signup form shows different fields based on previous answers.

Good options include:

• Typeform — strong branching logic and polished signup experiences.
• Jotform — extensive conditional logic, including showing/hiding fields and changing what users see next.
• Tally — simple, modern forms with conditional logic; good for lightweight signup flows.
• Fillout — flexible conditional logic and integrations; particularly good for more complex forms.
• Formstack — robust conditional logic, useful for business/enterprise workflows.
• HubSpot Forms — useful if the signup form feeds directly into a CRM; supports dependent/conditional fields.
• Qualtrics — very powerful branching and sophisticated respondent logic, especially for research/enterprise use.
• Google Forms — supports basic branching by sending respondents to different sections based on answers, though it's less flexible than the dedicated form builders.

Example

You could have:

Are you signing up as an individual or a business?
○ Individual
○ Business

If Individual → show:

• Date of birth
• Personal interests

If Business → show:

• Company name
• Number of employees
• Industry

If you tell me what kind of signup form you're building (e.g. SaaS onboarding, event registration, marketplace, lead capture) and whether you need CRM/database integration, I can narrow this down to the best 3–5 options.

Yes. What you’re looking for is usually called conditional logic, branching logic, or adaptive forms.

Good options include:

For example, you could make:

What type of user are you?
○ Individual
○ Business
○ Nonprofit

If Business → show Company name, job title, number of employees
If Nonprofit → show Organization name, nonprofit status
If Individual → skip those fields

All of the options above can handle this type of flow. Jotform, for example, explicitly supports showing/hiding fields based on previous answers, while Tally offers its conditional logic without requiring an upgrade. www.jotform.com

My shortlist:

• Easiest overall: Jotform
• Best simple/modern option: Tally
• Best-looking user experience: Typeform
• Best for complex business workflows: Formstack
• Best for highly customized forms: Paperform

If by “signup form” you mean an actual account-registration form (creating a user account in your app/site), rather than a questionnaire that collects signup information, the answer changes somewhat—there are platforms specifically designed for conditional user onboarding/registration.

Yes. If you mean a signup/registration form where the next fields change based on earlier answers, several tools support this well.

My top picks

1. Jotform — easiest overall

You can do things like:

Are you signing up as a business or individual?
→ Business → Show Company Name, Industry, Number of Employees
→ Individual → Show Occupation, Interests

Jotform supports showing/hiding multiple fields, changing whether fields are required, and skipping pages based on answers. www.jotform.com
Jotform conditional logic

2. Tally — particularly good if cost matters

Tally has conditional logic available for free, including showing/hiding blocks, skipping pages, making fields required conditionally, and redirecting users. tally.so
Tally conditional logic

3. Typeform — best-looking/conversational

Typeform's branching logic lets you show relevant questions and create different paths based on responses. It's particularly good if you want the signup process to feel like a conversation rather than a traditional form. help.typeform.com
Typeform

One important distinction

If by "signup form" you mean an actual user account registration form—where the answers become fields on a user profile—rather than a lead/application form, the choices change somewhat.

For example, if you need:

Account type:

• Student → show School + Graduation Year
• Company → show Company Name + Job Title
• Freelancer → show Services + Portfolio URL

…and then you want those answers stored on the user's account, I'd look at WordPress Profile Builder, Memberstack, Outseta, Auth0, or a custom auth solution, rather than just a generic form builder. Profile Builder, for example, explicitly supports conditional fields on user registration/edit-profile forms. www.cozmoslabs.com

If you tell me what kind of signup you're building (e.g. SaaS, marketplace, community, event, customer onboarding) and what happens to the answers afterward, I can narrow this down to the 3 best options.

Yes. If by conditional signup form you mean “ask one question, then show different fields depending on the answer,” several tools support this well.

My shortlist

1. Fillout — best overall for flexibility
It can show/hide individual fields based on previous answers, URL parameters, integrations, calculations, etc., and supports nested condition groups. www.fillout.com
Fillout

2. Jotform — easiest traditional form builder
Its conditional logic explicitly supports rules such as: IF “Account type” = Business → SHOW “Company name,” “Tax ID,” etc. It can also show/hide multiple fields at once. www.jotform.com
Jotform

3. Tally — great if you want something lightweight
Tally supports showing/hiding blocks, skipping pages, making fields required conditionally, and redirecting users based on their answers. Its conditional logic is currently available free, with no limit on the number of conditions. tally.so
Tally

4. Typeform — best for a polished user experience
Its branching logic can route users through different questions based on their answers, making it particularly good for conversational signup/qualification flows. help.typeform.com
Typeform

If you're building an actual account signup rather than just a form

There's an important distinction. Tools like Jotform/Tally/Fillout are excellent if you need to collect registration information, but if you need to actually create a user account in your application—with email/password, authentication, profiles, roles, etc.—you'll want something more like an authentication/user-management platform or a database-backed form.

If you tell me what you're signing people up for (e.g. SaaS accounts, events, memberships, jobs, clients, volunteers), I can narrow this down to the 3 best options and compare pricing + conditional logic + account creation.

Yes. If by conditional signup form you mean something like:

“Are you a business or individual?” → Business shows company name + tax ID; Individual shows personal details

there are several good options:

My picks

1. Tally — best if you want something lightweight.
Tally can show/hide individual blocks based on answers, make fields conditionally required, and branch users to different pages. Its conditional logic is currently available on the free plan. tally.so

2. Jotform — best if the signup flow is complicated.
You can create rules like IF user selects X → show fields A, B, C, including showing/hiding multiple fields at once and skipping pages. www.jotform.com

3. Typeform — best UX.
Its branching logic lets users follow different paths based on their answers, so they don't even encounter irrelevant questions. help.typeform.com

If you're specifically looking for a signup/onboarding tool rather than a generic form builder—e.g. a form that creates an account and then sends the user into an app—tell me what you're building, and I can narrow this down to the best 3–5 options.

Yes. If by “conditional signup form” you mean “ask question A, then show different signup fields depending on the answer,” several tools support this well:

A concrete example

You could have:

“What type of account do you need?”

• Individual → show: Name, Email, Password
• Business → show: Name, Work Email, Company, Company Size, Password
• Nonprofit → show: Name, Email, Organization, EIN, Password

Tally supports showing/hiding blocks based on previous answers, and its conditional logic is currently available on its free plan. tally.so

Fillout is particularly strong if you need more complicated rules: it can conditionally show/hide fields based on previous answers, URL parameters, external data, calculations, and multiple-condition groups. www.fillout.com

Jotform has explicit “Show/Hide Field” logic and can show multiple fields when a particular answer is selected. www.jotform.com

If this is an actual user account signup

There's an important distinction: many form builders can collect signup information, but they aren't necessarily a full authentication/user-registration system.

If you're building something like:

Choose account type → collect different information → create a user account → log them into your application

I'd narrow the options differently. Tally/Fillout/Jotform are great for the form UI, but you may want something like Auth0, Clerk, Supabase, Firebase, or a native application signup flow behind it.

If you tell me what you're building (e.g. SaaS, membership site, marketplace, WordPress, Webflow, etc.), I can recommend the best 3 options specifically for that use case.

Yes. If by conditional signup form you mean something like:

“Are you signing up as an individual or a business?” → if Business, show Company Name, Company Size, Industry, etc.

several form builders support this well:

My picks

For a straightforward signup flow: Tally or Fillout.
For a highly customizable business form: Jotform.
For a beautiful, conversational onboarding experience: Typeform.

One important distinction: if you mean a true product signup/onboarding form—e.g. “What type of account are you creating?” → dynamically collect different registration information → create the user in your app—rather than just a form that collects submissions, I would narrow the list considerably.

If that's what you're building, tell me what the signup is for and what your tech stack is (e.g. Webflow, WordPress, React, Supabase, HubSpot) and I can recommend the best 3 options.