If you ask what is the benefits of using contact form 7 (cf7) over other form plugins. I can say that the reason is its rich sets of addon plugins. Plugin developed with proper hooks so that any developer can create an addon plugin so easily. Here I am listing out the most popular addons of contact form 7

	Contact Form 7 Database Addon – CFDB7 The “CFDB7” plugin saves contact form 7 submissions to your WordPress database. Export the data to a CSV file. By simply installing the plugin, it will automatically begin to capture form submissions from contact form 7. FEATURES OF CFDB 7 No configuration is needed Save Contact Form 7 form submitted data to the database. Single database table for all contact form 7 forms Easy to use and lightweight plugin Developer friendly & easy to customize Display all created contact form 7 form list. Export CF7 DB (CF7 Database – cf7db) data in CSV file
	ReCaptcha v2 for Contact Form 7 Contact Form 7 v5.1 dropped support for reCaptcha v2 along with the [recaptcha] tag December 2018. This plugin brings that functionality back from Contact Form 7 5.0.5 and re-adds the [recaptcha] tag. If this plugin is installed before updating Contact Form 7 from v5.0.5 to v5.1.1 then it will carry over your old API keys. At that point you will just need to head to this plugins settings page to tell the website to use reCaptcha v2. Once installed and configured it should be the same reCaptcha functionality you are used to in previous versions of Contact Form 7.
	Conditional Fields for Contact Form 7 This plugin adds conditional logic to Contact Form 7. If you edit your CF7 form, you will see an additional tag called “Conditional fields Group”. Everything you put between the start and end tag will be hidden by default. After you have added the field group(s), click Save and go to the “Conditional fields” tab to create one or more conditions that will make the group(s) appear.
	Contact Form 7 Dynamic Text Extension Contact Form 7 is an excellent WordPress plugin, and the CF7 DTX Plugin makes it even more awesome by adding dynamic content capabilities. While default values in Contact Form 7 are static. CF7 DTX lets you create pre-populated fields based on other values. Some examples might include: Auto-filling a URL Auto-filling a Post ID, title, or slug Pre-populating a Product Number Referencing other content on the site Populating with post info Populating with user info Populating with custom fields Any value you can write a shortcode for There are many more case-specific examples, and since you can use any shortcode, you can add any text data to the form that can be generated on the server with PHP.
	Contact Form 7 Extension For Mailchimp WordPress Extension For Mailchimp (Chimpmatic Lite). Integrate Contact Form 7 with Mailchimp Audiences. Automatically add your Contact Form 7 submissions to predetermined lists in Mailchimp, using Mailchimp’s latest API. This Contact Form 7 Extension for Mailchimp supports multiple contact forms, mailing lists and API Keys. Marketing professionals love Contact Form 7 Extension For Mailchimp for many reasons. It’s easy to set up and very flexible. If you don’t have an email marketing solution in place, this plugin is a good place to start harnessing the power of this marketing strategy and Mailchimp. The best form of engagement is direct email contact with your readers. This begins with your visitors making contact through your website contact form and this is where the WordPress Contact Form 7 plugin will help you. Contact Form 7 & Mailchimp Integration that gives you the flexibility to easily grow your Mailchimp audience lists via your Contact Form 7 form submitals.
	Contact Form 7 Skins CF7 Skins works right within the normal Contact Form 7 interface, making it easier for regular WordPress users to create Contact Form 7 forms – even if you don’t have HTML + CSS skills. Includes a drag & drop Visual Editor together with range of compatible Templates and Styles. Select from a list of compatible Templates that cover many common forms and then choose from a range of professional and beautiful Styles. Each Template acts as an easy to follow guide, which can be adapted to your requirements. Every Style covers the full range of Contact Form 7 form elements.
	CF7 Google Sheets Connector This plugin is a bridge between your WordPress Contact Form 7 forms and Google Sheets. When a visitor submits his/her data on your website via a Contact Form 7 form, upon form submission, such data are also sent to Google Sheets. Get rid of making mistakes while adding the sheet settings or adding the headers ( Mail Tags ) to the sheet column
	Contact Form 7 Multi-Step Forms I needed a contact form that spanned across multiple pages and in the end would send an email with all the info collected. This plugin adds onto the popular Contact Form 7 plugin to do just that.
	Contact Form 7 – Success Page Redirects An add-on for Contact Form 7 (CF7) that provides a straightforward method to redirect visitors to success pages or thank you pages, if their messages are successfully delivered. If no message is sent, or if there is an error with the form, the user will not be redirected.
	Contact Form 7 Google Analytics Adds Google Analytics Event Tracking to all Contact Form 7 forms sitewide, using “Contact Form” as the Event Category, the Contact Form 7 event as the Event Action, and the form name as the Event Label.