Siteimprove

The Siteimprove CMS Plugin bridges the gap between the WordPress content management system (CMS) and the Siteimprove Intelligence Platform. Now you can scan your website for errors as soon as a page is published, allowing you to fix mistakes, optimize content, and manage your site more efficiently. 
The plugin also provides you access to Prepublish, an add-on which allows you to check your page for issues before it has been published.

Turn your most complex website challenges into manageable tasks—all from a single platform

WebSpellChecker

WProofreader plugin for WordPress scans and checks your website content for spelling, grammar, punctuation and style issues. No banner ads on your website!
Compatible with the following WordPress versions:
<ul>
<li>WordPress 4.x</li>
<li>WordPress 5.x</li>
<li>WordPress 6.x</li>
</ul>
Free WProofreader plugin supports only spell-check for 6 languages and comes with a usage limit of 10,000 words processed per day for a single website. Upon reaching the limit, the plugin stops working until the next day. Check more differences between WProofreader plugin free and pro versions below.
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<h3>WProofreader Free and Pro versions</h3>
<h4>Free version: ($0)</h4>
<ul>
<li>Usage limit: Up to 10,000 words processed per day for a single website. Once the daily limit is reached, the plugin will stop working.</li>
<li>Allowed number of websites: 1 website.</li>
<li>Languages available for spell checking: (6 languages) American English, British English, French, German, Italian and Spanish.</li>
<li>Languages available for grammar checking: Not available.</li>
<li>User-level custom dictionary: No cloud backup. The dictionary is only available in one browser on a single device.</li>
<li>Organization-level custom dictionary: Not available.</li>
</ul>
<h4>Pro version: ($49)</h4>
<ul>
<li>Usage limit: Up to 100 million words processed per year. No daily limits applied.</li>
<li>Allowed number of websites: unlimited</li>
<li>Languages available for spell checking: 20+ popular languages.</li>
<li>Languages available for grammar checking: Not all listed languages support grammar checks. <a href="https://webspellchecker.com/supported-languages/" rel="nofollow ugc">Here</a> is the updated list of supported languages and the ones marked for grammar check.</li>
<li>User-level custom dictionary: Stored in the cloud, available from any browser or device. The user can freely access, review and modify the list of words in the dictionary.</li>
<li>Organization-level custom dictionary: The subscription owner can create global dictionaries that will be available across all the connected websites.</li>
</ul>
<h3>User functionality</h3>
Proofreading modes
<ul>
<li>The check-as-you-type mode instantaneously detects writing mistakes and provides suggestions on-hover.</li>
<li>The proofread-in-dialog mode aggregates all the issues detected and suggestions provided.</li>
</ul>
Customizable dictionaries
<ul>
<li>User-level custom dictionary allows end users to create personal dictionaries with specific words and terms (complex words, acronyms, proper names, etc.) and use them while working with WordPress. Once a word is added to a personal dictionary, it will not be considered as a misspelling, and will appear in the suggestions list. All customly added words are stored either in the browser local storage or on our cloud and are accessible from the browser</li>
<li>Organization-level custom dictionary allows creating company-wide dictionaries that extend the vocabulary of the standard dictionary with custom words specific to your company culture, industry, domain, etc. All the words added to an organization-level custom dictionary by the admin will be available to all users within your company. This type of dictionary is available only under the Pro version</li>
<li>Specialized medical spelling dictionaries for English, German, French and Spanish and legal dictionaries for English. Available for both — free and Pro versions of the plugin</li>
</ul>
Feature-rich
<ul>
<li>Multi-language support</li>
<li>Spelling autocorrect functionality for instant correction of common typos</li>
<li>Autocomplete suggestions functionality for faster writing</li>
<li>Style guide functionality with pre-defined non-inclusive and profanity language check for professional writing</li>
<li>User-level and organization-level dictionaries</li>
</ul>
User-friendly and up-to-date
<ul>
<li>Straightforward plugin configuration (check the video tutorial)</li>
<li>Visible and intuitive text check with different colors used for spelling, grammar, and style guide issues</li>
<li>Easily toggle on/off the plugin button</li>
<li>Support the latest version of WordPress</li>
<li>Seamlessly integrates with the WordPress latest editor — Gutenberg and compatible with the classic editor of WordPress 4.x.</li>
<li>Support of the browsers: Chrome, Firefox, Safari, Microsoft Edge, Internet Explorer 11</li>
<li>Content elements supported: pages, posts, tag descriptions, category descriptions, WooCommerce, WP eCommerce product descriptions, any custom post types, meta description fields of Yoast SEO plugin.</li>
</ul>
<h3>Benefits of WProofreader plugin for WordPress</h3>
<ul>
<li>It saves time proofreading in any of the two modes – check-as-you type and proofread-in-dialog.</li>
<li>You can create and maintain quality posts in different languages without worries about possible mistakes.</li>
<li>Advanced functionality for spelling autocorrect, autocomplete suggestions and style guide for faster and more productive writing.</li>
</ul>

WProofreader spell & grammar check plugin for WordPress

WProofreader checks spelling, grammar, and style in real-time while editing in WordPress.

Siteimprove vs WProofreader spell & grammar check plugin for WordPress