Websorcery

This plugin automatically hides the “Add to Cart” button for WooCommerce products that have no price set (or empty price). Instead, it displays a customizable “Request Price” button that opens a lead capture modal.
Features: 
* Automatic detection of checking empty prices. 
* Lead capture form (Name, Phone). 
* Email notifications. 
* Customizable design via settings. 
* GDPR compliant checkbox. 
* Localization support (i18n).

Websorcery Request Price

Replaces "Add to Cart" with "Request Price" button for lead generation.

Dits.Agency

Quick Callback Button is a modern floating contact button plugin for WordPress that helps visitors contact your business faster through callback requests, phone calls, and popular messengers.
The plugin adds a customizable floating button with a popup contact form and support for: 
* WhatsApp 
* Telegram 
* Viber 
* Direct phone links
Designed for lead generation and better user engagement, Quick Callback Button works perfectly for business websites, agencies, services, WooCommerce stores, landing pages, and local companies.
<h3>Features</h3>
<ul>
<li>Floating callback button – Always visible but non-intrusive.</li>
<li>Modern popup/modal contact form – Simple and effective for lead capture.</li>
<li>Messenger integration – Quick links to WhatsApp, Telegram, and Viber.</li>
<li>Click-to-call – Direct phone links for mobile users.</li>
<li>Email notifications – Instant alerts for callback requests.</li>
<li>Multiple recipients – Send notifications to several email addresses.</li>
<li>Phone validation – Built-in phone number masking and validation.</li>
<li>Full Customization – Control colors, styles, and animation effects.</li>
<li>Themes – Support for light and dark modal themes.</li>
<li>Optimized – Lightweight, responsive, and mobile-friendly.</li>
<li>Compatible – Works with Elementor, Gutenberg, and all modern themes.</li>
</ul>
<h3>Third-party Resources</h3>
<ul>
<li>
Resource Name: Phone, Telegram, Viber, WhatsApp Icons (SVG) 
License: GPLv2 or later 
License URI: https://www.gnu.org/licenses/gpl-2.0.html
</li>
<li>
Resource Name: IMask.js 
License: MIT 
License URI: https://github.com/uNmAnNeR/imaskjs 
Source: https://imask.js.org/
</li>
<li>
Resource Name: MicroModal (micromodal.min.js) 
License: MIT 
License URI: https://opensource.org/licenses/MIT 
Source: https://github.com/ghosh/Micromodal
</li>
<li>
Resource Name: Space Grotesk (font) 
License: OFL-1.1 
License URI: https://opensource.org/licenses/OFL-1.1 
Source: https://github.com/floriankarsten/space-grotesk
</li>
</ul>
<h3>External Services</h3>
This plugin provides an option to contact via WhatsApp. When enabled, it generates a link to the WhatsApp API (https://api.whatsapp.com/send). Data (phone number) is sent only when a visitor clicks the button. 
WhatsApp Privacy Policy: https://www.whatsapp.com/legal/privacy-policy
AJAX callback requests: This plugin handles callback requests via an AJAX POST request to the WordPress backend. Data (phone number) is used only to send an email to the site administrator.

Quick Callback Button

Modern floating callback and messenger button for WordPress with popup contact form, WhatsApp, Telegram, Viber, click-to-call and customizable styles.

Websorcery Request Price vs Quick Callback Button