FormFlow vs Formik

Name: FormFlow
Rating: 4.9 (50 reviews)
Author: FormFlow

Modern hooks API vs render props, plus built-in backend submission.

Key Differences

1. API Style: Formik uses render props and component-based API. FormFlow uses modern React hooks.

2. Backend: Formik is frontend-only. FormFlow includes backend submission out of the box.

3. Performance: FormFlow is built on react-hook-form, which is faster and has smaller bundle size.

Code Comparison

Formik (Render Props)

import { Formik, Field, Form } from 'formik';

function ContactForm() {
  return (
    <Formik
      initialValues={{ email: '', name: '' }}
      onSubmit={async (values) => {
        // You write the API call
        await fetch('/api/contact', {
          method: 'POST',
          body: JSON.stringify(values),
        });
      }}
    >
      <Form>
        <Field name="email" type="email" />
        <Field name="name" />
        <button type="submit">Submit</button>
      </Form>
    </Formik>
  );
}

// Still need:
// ❌ Backend API route
// ❌ Database
// ❌ Email notifications

FormFlow (Hooks)

import { useFormFlow } from '@formflow.sh/react';
import { Input } from '@/components/ui/input';

function ContactForm() {
  const { register, handleSubmit } = useFormFlow({
    apiKey: process.env.NEXT_PUBLIC_FORMFLOW_API_KEY,
    onSuccess: () => alert('Sent!'),
  });

  return (
    <form onSubmit={handleSubmit}>
      <Input {...register('email')} type="email" />
      <Input {...register('name')} />
      <button type="submit">Submit</button>
    </form>
  );
}

// Backend included:
// ✅ API, storage, emails all automatic

Feature Comparison

Feature	FormFlow	Formik
Modern hooks API	✓	✗ (render props)
Works with UI libraries	✓	Limited
TypeScript support	✓	✓
Client-side validation	✓	✓
Bundle size	Small (~24kb)	Larger (40kb)
Performance	Faster	Slower
Backend submission	✓	✗
Data storage	✓	✗
Email notifications	✓	✗
Dashboard & analytics	✓	✗

API Style Comparison

Formik (Render Props)

<Formik
  initialValues={{...}}
  onSubmit={(values) => {...}}
>
  {({ handleSubmit, values }) => (
    <Form>
      <Field name="email" />
    </Form>
  )}
</Formik>

Render props pattern requires nesting and callback functions

FormFlow (Hooks)

const { register, handleSubmit } =
  useFormFlow({
    apiKey: 'xxx',
    onSuccess: () => {...}
  });

<form onSubmit={handleSubmit}>
  <input {...register('email')} />
</form>

Modern hooks pattern is cleaner and more intuitive

Performance

~24kb

FormFlow bundle size

40kb

Formik bundle size

60%

Smaller bundle

FormFlow is built on react-hook-form, which is optimized for performance with fewer re-renders

Use Formik when:

✓ You're already using it (migration cost)
✓ You prefer render props pattern
✓ You have custom backend logic
✓ You need Formik-specific plugins

Use FormFlow when:

✓ You want modern hooks API
✓ You need better performance
✓ You don't want to write backend code
✓ You want built-in storage and notifications

Migrating from Formik

Switching from Formik to FormFlow is straightforward:

Before (Formik)

<Formik
  initialValues={{ email: '' }}
  onSubmit={(values) => {
    fetch('/api/submit', {
      method: 'POST',
      body: JSON.stringify(values)
    });
  }}
>
  <Form>
    <Field name="email" />
    <button type="submit">
      Submit
    </button>
  </Form>
</Formik>

After (FormFlow)

const { register, handleSubmit } =
  useFormFlow({
    apiKey: 'xxx',
    onSuccess: () => alert('Sent!')
  });

<form onSubmit={handleSubmit}>
  <input {...register('email')} />
  <button type="submit">
    Submit
  </button>
</form>

Ready for a modern form library?

Hooks API + built-in backend. Faster, smaller, easier.