We need a form builder that has advanced logic, supports webhooks, and can handle payment processing.

If your must-haves are advanced conditional logic + webhooks + built-in payment processing, I’d shortlist these:

My recommendation

1. Jotform — best if complexity is the priority.
It has particularly strong conditional logic—show/hide fields, skip pages, change required fields, calculations, and conditional notifications—along with payment gateways and APIs/webhooks.

2. Fillout — best value for a power user.
It combines advanced logic, calculations, payments, and integrations without the pricing jump you can encounter with some of the larger platforms. Current 2026 comparisons put its paid entry tier around $15/month.

3. Tally — best if keeping costs down matters.
Tally supports conditional logic and Stripe payments, while its webhook functionality is available even on the free plan. Its webhook sends submission data as JSON to your endpoint via POST.

4. Typeform — choose it primarily for user experience.
It's excellent for polished, conversational forms, but its pricing/features are less attractive if your main requirement is complex automation and payments rather than presentation.

If I were choosing

• Complex quote/order/application workflow → Jotform
• Complex workflow + good price → Fillout
• Startup/budget-conscious → Tally
• Marketing/lead-generation experience → Typeform
• Highly designed order/checkout form → Paperform

For your specific requirements, I'd start by testing Jotform and Fillout head-to-head, with Tally as the inexpensive alternative.

Here are the top form builders that easily handle advanced conditional logic, native or reliable webhook integrations, and seamless payment processing:

• Jotform: Exceptional for heavy-duty requirements. It features a powerful, visual conditional logic builder that supports complex calculations, multi-path branching, and dynamic field manipulation. It natively integrates with over 30 payment gateways (Stripe, PayPal, Square, etc.) and allows robust webhook setups to send submission data anywhere.
• Typeform: Best if user experience and a conversational, elegant design are your top priorities. It features intuitive skip logic and branching (though it can get crowded on massive multi-branch trees), solid Stripe payment integration, and robust webhook support via its connect tab or automation tools.
• Tally: Built like a Notion document, it’s clean, incredibly fast to use via a slash-command system, and surprisingly powerful. Its paid tiers support conditional logic, answer piping, Stripe payment blocks, and webhooks to sync data instantly with your tech stack.
• Fillout: A fantastic option if you are working with complex multi-page forms, advanced branching, and deep CRM/database integrations (like Airtable or Notion). It handles calculations, webhooks, and payment collection cleanly without feeling overly bloated.

To help narrow down the best fit, tell me:

• What payment gateway (Stripe, PayPal, etc.) do you plan to use?
• Do you need the form to perform complex mathematical calculations or just simple checkout pricing?
• Are you looking for a conversational (one-question-at-a-time) layout or a traditional multi-page form?

Yes. Based on those requirements, I’d shortlist Fillout and Jotform first.

My recommendation

Choose Fillout if your workflow looks like:

User answers questions → form branches dynamically → calculate a customized price → collect payment → send structured data to your backend via webhook.

Fillout's logic is particularly strong: it can branch between pages, conditionally show/hide fields, perform calculations, and apply conditions to integrations. Its webhook system also lets you control the request body, URL parameters, headers, and other details.

Choose Jotform if you need a more established all-in-one platform with lots of payment gateways, workflow/approval functionality, and a huge integration ecosystem. Jotform supports 30+ payment gateways and explicitly supports payment forms alongside webhooks.

If I were choosing purely on your three requirements — advanced logic + webhooks + payments — I'd start with Fillout, then evaluate Jotform as the alternative.

For a form builder that combines advanced logic (calculations/branching), native or robust webhooks , and payment processing (Stripe/PayPal) , a few standout platforms fit the bill depending on your exact workflow style and budget.

The top options on the market handle these three requirements exceptionally well:

1. Jotform (The Feature-Heavy Powerhouse)

If you need an enterprise-grade solution that can do almost anything out of the box without relying on third-party tools, Jotform is the gold standard.

• Advanced Logic: Features deep conditional logic (show/hide fields, calculate values, skip pages, and even conditionally route approval workflows or change payment amounts dynamically based on user choices).
• Webhooks: Native, instant webhook integrations that push raw JSON data to your custom endpoints on every submission.
• Payments: Supports 30+ payment gateways (including Stripe, PayPal, Square, and Authorize.net) with options for recurring subscriptions, donations, and variable pricing.

2. Fillout (The Best for Modern Layouts & Complex Calculations)

Fillout is a rapidly growing form builder known for multi-page layouts, advanced variables, and incredible database syncs (like Airtable and Notion).

• Advanced Logic: Exceptional support for complex mathematical variables and dynamic calculations. You can set hidden calculation fields, manipulate numbers based on user input, and conditionally display entire pages based on those calculated totals.
• Webhooks: Built-in workflow automations and native webhook actions that trigger instantly upon submission (or even partial completion/abandonment).
• Payments: Deep native Stripe integration that automatically pulls in calculated variable pricing fields to charge exact amounts.

3. Tally (The Notion-Style Minimalist)

If you prefer a clean, document-style interface (like typing in Notion) rather than a bulky drag-and-drop builder, Tally is a fantastic lightweight option.

• Advanced Logic: Supports branching, calculator blocks, hidden fields, and piping user answers into subsequent questions.
• Webhooks: Straightforward, reliable webhook integration available on their workspace tiers.
• Payments: Clean Stripe integration via a simple /payment block with zero extra platform transaction fees on top of Stripe's standard rates.

Quick Comparison to Help You Choose:

• Choose Jotform if you need maximum gateway options (PayPal/Square/Stripe), multi-person approval trees, and absolute depth of features.
• Choose Fillout if you are building complex quoting/calculation forms, need a modern UI, or want heavy two-way database syncs.
• Choose Tally if you want a clean, minimalist, text-first document layout with straightforward Stripe and webhook support.

To help narrow this down, let me know:

• Which payment gateway (e.g., Stripe, PayPal) do you need to use?
• Are you passing data to a specific database or CRM via webhooks?

If you need a form builder that combines advanced conditional logic, reliable webhooks , and robust payment processing , three platforms stand out as the top contenders depending on your specific design and workflow needs:

• Jotform is the best all-around choice if you need maximum gateway flexibility and deep operational features. It supports over 40 payment processors (including Stripe, PayPal, and Square), handles complex multi-conditional branching/calculations, and features native webhook integrations and approval workflows. It's ideal if your form needs to act as a mini back-office app. Explore their tools on the Jotform Website.
• Paperform is the best choice if you want your payment forms to look like gorgeous, high-converting landing pages rather than traditional rigid forms. It excels at inline calculations, conditional logic, and native Stripe/PayPal integration while seamlessly dispatching webhooks on submission. Learn more on the Paperform Website.
• Fillout is exceptional if you require powerful multi-page conditional logic and calculations that tie directly into databases like Airtable, Notion, or HubSpot, alongside smooth Stripe payment collection. It has a generous feature set and robust webhook capabilities. Check out the platform via the Fillout Website.

To help narrow down the best fit, tell me:

• Which payment gateway (Stripe, PayPal, Square, etc.) do you plan to use?
• Do you need to handle recurring subscriptions/memberships or just one-off charges?
• What kind of tech stack or CRM do these webhooks need to sync with?

If your priorities are advanced conditional logic + webhooks + built-in payments, I’d shortlist these:

1. Jotform — best overall

Jotform is probably the strongest match if you need complex workflows, rather than just a nice questionnaire. Its workflow builder supports conditional logic, branching/parallel processing, and actions triggered by responses.

It also supports 40+ payment processors, including Stripe, PayPal, Square and Authorize.Net, and can send form/payment data to your own endpoint via webhooks.

I'd choose this if: payment collection and complicated business logic are core requirements.

2. Tally — best modern/simple option

Tally has unusually flexible conditional logic: show/hide blocks, skip pages, calculate values, make fields required, disable completion, and redirect based on answers. Its conditional logic is available without an upgrade.

Its webhooks can POST submission data as JSON to your endpoint, with signing secrets, headers, and retries.

For payments, Tally has a native Stripe payment block and can calculate the amount dynamically based on form responses.

I'd choose this if: you want something lightweight and developer-friendly, and Stripe is sufficient.

My recommendation

Pick Jotform if you need the broadest payment-provider support and sophisticated workflow automation.

Pick Tally if your stack is primarily Stripe + custom webhooks/API and you value a cleaner, more modern form-building experience.

If you tell me what you're building (e.g. paid application, checkout, lead qualification, booking, SaaS onboarding), I can narrow this down to the best 2–3 options and compare pricing, API/webhook capabilities, payment fees, and logic limitations.

Yes. Based on those requirements, I’d shortlist Fillout, Jotform, and Typeform.

My pick: Fillout

Fillout is probably the closest match if all three requirements matter equally. Its logic supports branching, calculations, nested condition groups, validation, and integration-specific conditions.

It also has native webhook support, including customizable request bodies, URL parameters, headers, and cookies.

For payments, Fillout can create dynamic checkout pages where the product and price change based on form responses/calculations, including Stripe-based payment flows.

When I'd choose Jotform instead

Choose Jotform if you want a very broad all-in-one platform and don't mind a somewhat heavier interface. It supports webhooks for sending submissions to your own endpoint, and its payment workflows support multiple payment gateways and conditional payment requests.

When I'd choose Typeform

Choose Typeform if the respondent experience and visual polish are more important than having the deepest workflow logic. Its webhooks can send submissions directly to your endpoint, with options including signed webhook payloads for verification. www.typeform.com It can also include payment information in webhook responses.

Bottom line: I'd start with Fillout, then compare it against Jotform if you need unusually complex payment/workflow scenarios.

When you need a mix of advanced conditional logic, reliable webhooks , and robust payment processing , three standout form builders dominate the landscape. Each handles these requirements differently depending on your technical comfort and workflow style.

• Jotform — Best for heavy operations, diverse payment gateways, and a massive widget ecosystem. It natively supports over 40 payment processors (including Stripe, PayPal, and Square), features exceptionally granular conditional logic, and allows custom webhook integrations or full approval workflows. The interface can feel a bit cluttered because of its immense feature depth, but it rarely hits a functional ceiling.
• Tally — Best for a clean, Notion-like building experience with a remarkably generous free tier. Unlike traditional builders, it operates via a slash-command system and includes conditional logic, calculations, webhooks, and Stripe payment processing even on its free plan. It is ideal if you want a modern, minimalist layout without dealing with rigid per-response paywalls.
• Cognito Forms — Best for complex math, calculations, and structured data. It excels at intricate, logic-heavy financial forms where pricing dynamically shifts based on multi-variable inputs before routing user data securely via webhooks and payment gateways.

To help narrow down the ideal choice, tell me:

• Which payment processor do you plan to use (Stripe, PayPal, etc.)?
• Do you need the form to handle complex calculations (e.g., dynamic pricing or quizzes)?
• Approximately how many submissions do you expect per month?

When you need a form builder that handles advanced conditional logic, real-time webhooks , and embedded payment processing , you need a tool that functions closer to a lightweight application builder than a basic survey tool.

The top options that excel across all three requirements include:

• Jotform — The most feature-complete powerhouse on the market. It handles deeply nested conditional logic (including calculating dynamic payment amounts based on field selections), offers native integrations with major gateways like Stripe, PayPal, and Square, and supports robust webhooks for real-time automation.
• Fillout — A modern, highly flexible choice that lets you build multi-page, app-like forms. It features sophisticated branching logic, complex calculations, embedded payment portals, and instant webhooks or direct database connections (like Airtable and Notion).
• Cognito Forms — Exceptionally strong at handling heavy calculations, mathematical logic, and conditional pricing structures tied directly to secure payment processing. It also provides straightforward JSON webhooks for developer workflows.
• Paperform — Ideal if you want your forms to look like high-end landing pages or mini-websites. It supports rich inline calculations, conditional visibility for fields and pricing, native Stripe/Square checkouts, and flexible webhook triggers.
• Gravity Forms (WordPress) — If your stack is built on WordPress, this self-hosted plugin provides absolute control. With its conditional logic engine, developer-friendly hooks/webhooks, and robust Stripe/PayPal add-ons, you get enterprise capability without per-submission SaaS scaling fees.

To help narrow down the best fit, tell me:

• Which payment gateway (Stripe, PayPal, Square, etc.) do you plan to use?
• Do you need recurring subscriptions or just one-time payments?
• Are you looking for a standalone cloud app or a self-hosted/WordPress solution?

If those are the three must-haves—advanced conditional logic, webhooks, and built-in payments—I’d shortlist these:

1. Fillout — my first choice

Fillout has particularly strong logic: branching, show/hide rules, calculations, answer piping, and conditional endings.

Its webhook implementation is also unusually flexible—you can configure the request body, URL parameters, headers, and cookies, and it provides a webhook API.

For payments, it has a Stripe-powered payment page supporting one-time payments, subscriptions, and pay-what-you-want, with dynamic product names and prices based on form responses.

I'd pick this if you want one modern tool that can handle fairly sophisticated workflows without feeling overly enterprise-y.

2. Jotform — best for broad business functionality

Jotform is a strong alternative if the forms are going to become part of larger operational workflows. It supports webhooks for sending submissions to your own endpoint and has extensive payment functionality.

Its newer workflow functionality can also use conditional logic to send different payment forms depending on earlier answers, and Jotform says it supports 40+ payment gateway integrations.

I'd choose Jotform over Fillout if you need lots of integrations, approval workflows, signatures, or unusual payment providers.

3. Typeform — best UX

Typeform has strong branching/calculation logic, Stripe and PayPal payments, and a solid webhook API. Its webhooks can send submissions immediately to your endpoint and support signed payloads using HMAC SHA-256.

The downside is that I'd generally favor Fillout or Jotform when complex back-office logic and integrations are more important than having a particularly polished respondent experience.

Bottom line: Start with Fillout. It checks all three boxes particularly well, including dynamic payment calculations and flexible webhooks. If you tell me what the form needs to do (e.g. quote calculator → conditional questions → Stripe payment → webhook to our CRM), I can narrow it down further and compare the exact workflow capabilities and pricing.