List of the Top 5 On-Prem Grammar Checkers in 2025

Key Features of Trinka AI include an advanced grammar checker, a unique paraphrasing tool, and a plagiarism detection system. Additionally, it offers a consistency checker, inclusive language assessments, and specialized support for legal writing. The software also ensures publication readiness through various checks and includes a citation verification tool. Furthermore, it is capable of proofreading both Word and LaTeX files, along with numerous other functionalities designed to enhance writing quality.

ProWritingAid assists businesses in creating higher-quality content, communications, reports, proposals, and various other documents more efficiently. By addressing frequent issues like inconsistent terminology, contextual spelling mistakes, grammatical errors, and subpar style, ProWritingAid enhances overall writing quality. It offers numerous integration possibilities, including APIs and onsite solutions, making it suitable for organizations of all sizes. This versatility is particularly beneficial for those with specific privacy and security needs, ensuring that all users can maintain compliance while improving their written materials. Ultimately, ProWritingAid is a valuable tool for any company aiming to elevate their documentation processes.

WProofreader SDK comprises a collection of ready-to-use components tailored for rich text editors like CKEditor, Froala, TinyMCE, and Quill.je, allowing developers to enhance the proofreading features of their web applications or systems effectively. Its essential capabilities include robust security, support for multiple languages, sophisticated grammar and spell checking, extensive customization options, and accessibility features, along with an HTTP API for seamless interaction. This API provides a range of commands to the proofreading engine, enabling developers to modify the product's behavior and capabilities to suit their needs. Additionally, WProofreader is accessible as a browser extension compatible with Chrome, Firefox, and Microsoft Edge, making it versatile for various users. This tool is specifically crafted to cater to the needs of both individuals and businesses looking to improve their writing quality.

Sapling serves as an AI tool designed for customer-oriented departments, seamlessly integrating with messaging platforms and CRMs to help agents craft tailored responses. This innovative platform offers managers valuable conversational insights, enhancing their ability to coach and prepare their teams effectively. With features such as autocomplete, spelling and grammar checks, as well as snippets and text expansion tools, Sapling ensures that communication is both efficient and accurate. Furthermore, its services can be deployed on-premise or in the cloud, catering to various security and privacy needs. The Grammar and Spelling APIs enable the integration of Sapling's advanced language models into bespoke applications and specific use cases. Additionally, the Sapling Suggest feature allows agents to quickly access pertinent answers from a centralized knowledge database, enabling them to respond to customer queries more swiftly by simply clicking on the preferred response. By shifting away from rigid, decision tree-based chatbots, businesses can empower their agents to provide more personalized and effective customer service. This approach not only improves response times but also enhances customer satisfaction, creating a more engaging experience.

TextGears offers a range of services including translation, paraphrasing, and text verification for numerous businesses worldwide. Clients can access a complimentary demo online. Additionally, the API enables seamless integration of TextGears’ text analysis capabilities into any contemporary software solution. For organizations that prefer to keep their operations within a secure corporate network, on-premise installation is the ideal choice. The platform supports a diverse array of languages such as English, French, German, Portuguese, Russian, Italian, Arabic, Spanish, Japanese, Chinese, and Greek, ensuring accessibility for a global audience. This broad language support enhances TextGears' utility for companies engaging with international clients and partners.