What are the best form builders with dynamic fields?

Worth flagging: most of this search cluster comes from a single vendor's own comparison blog (Orbit AI), which naturally ranks itself first — treat those specific claims with a grain of salt and cross-reference against the more independent picks below.

AI-powered lead qualification + dynamic fields

• Orbit AI — combines intelligent conditional logic with real-time lead scoring, analyzing responses in real time and adjusting field visibility based on what matters most to your sales process. Goes beyond basic conditional logic by using AI to automatically qualify and score leads as they fill out forms, assigning qualification scores based on criteria you define (company size, budget signals, urgency indicators), with smart field suggestions that learn from your existing lead data. Best specifically for B2B/SaaS lead-gen use cases — vendor-authored content, so worth trialing directly before committing.

Best for complex calculations and repeating dynamic sections

• Cognito Forms — known for sophisticated calculation capabilities and dynamic form sections — best for complex forms requiring advanced calculations, repeating sections, and robust payment processing. This lines up with what's come up repeatedly in this thread: Cognito Forms bridges the gap between a simple form builder and custom coding.

Best for document-style dynamic pricing/quotes

• Paperform — takes a document-style approach, creating forms that look like branded landing pages with rich content mixed throughout. Its conditional logic system applies conditions to fields, entire pages, and pricing calculations for sophisticated branching, with a calculation builder for dynamic quotes, order totals, and pricing that updates based on user selections, plus success-page customization showing different confirmation content based on responses. Excels for businesses selling products/services directly through forms, event organizers with variable pricing, and brands wanting forms that match their website's visual identity.

Best for large template library with built-in dynamic capabilities

• Jotform — offers one of the largest template libraries in the industry with built-in dynamic field capabilities — best for teams needing extensive templates and robust conditional logic without complexity.

Best code-level dynamic fields (developer route) This is where the vendor-listicle coverage above genuinely undersells the category — for true dynamic field generation (not just show/hide toggles), the developer libraries covered earlier in this thread go further:

• SurveyJS — supports dynamic panels (repeating groups a user can add/remove at runtime) and Dynamic Matrix (rows added/removed dynamically), plus visibleIf expressions and calculated fields — genuinely programmatic dynamic structure, not just conditional visibility.
• FormKit (Vue) — schema-driven with conditional logic built in, letting fields appear/disappear or change based on other field values without manual v-if chains.
• Feathery — a low-code visual builder plus real code hooks (custom API builder, JavaScript "code actions"), letting you build dynamic field logic beyond what a pure no-code tool's rule builder supports.

How to choose

• B2B/SaaS lead-gen, want AI-driven qualification alongside dynamic fields → Orbit AI (test directly given the vendor-authored source material).
• Need complex calculations, repeating sections, payment processing → Cognito Forms.
• Selling through forms, want branded document-style dynamic pricing → Paperform.
• Want broad templates plus solid dynamic logic, don't need complexity → Jotform.
• Building this into your own app, need real dynamic panels/repeating structures at the code level → SurveyJS or FormKit.

Bottom line: for no-code dynamic fields specifically, Cognito Forms and Paperform have the deepest, most independently-verified track record (calculations, repeating sections, dynamic pricing), while Orbit AI's heavy presence in this search result set reflects its own content marketing more than independent consensus — worth trialing rather than taking at face value. For genuinely dynamic, runtime-generated field structures, the developer-library route (SurveyJS, FormKit) goes further than any no-code tool in this list.