Best AI Grammar and Spell Checkers in 2024

Best AI Grammar and Spell Checkers in 2024

What is AI Grammar and Spell Check API?

AI Grammar and Spell Checker refers to the use of artificial intelligence technology to automatically detect and correct grammatical errors and spelling mistakes in written text. It works by analyzing the text and comparing it to a vast database of grammar and spelling rules, as well as common errors.

Grammar & spell check feature on Eden AI
AI Grammar and Spell Check on Eden AI

These tools use natural language processing (NLP) algorithms to analyze the text, identify errors, and suggest corrections, providing writers with real-time feedback as they type. Some AI Spell Check tools also offer suggestions for improving sentence structure, word choice, and overall clarity of the text.

AI Grammar and Spell Check uses cases

You can use AI Spell Checker in numerous fields, here are some examples of common use cases:

  • Education: improve the quality of academic writing, helping students catch errors they may have missed, and allowing them to submit more polished papers. Educators can also use the tool to provide feedback to students on their writing.
  • Business: help employees improve their written communication skills and avoid mistakes in emails, reports, and other documents, ensuring clear and error-free communication.
  • Journalism: catch errors in articles before they are published, helping to maintain credibility and ensure that their writing is of the highest quality.
  • Marketing: help marketers create compelling copy that is free of errors and typos since clear and persuasive writing is essential in marketing
  • Customer service: improve the quality of customer service emails and chat messages, helping companies maintain a professional image and build stronger relationships with their customers.

These are just a few examples of Spell Check uses case, it can be applied in many different fields to improve written communication and enhance the quality of content.

Spell Check result for an email

Best AI Grammar and Spell Checkers on the market

You can access many AI Grammar and Spell Checkers with one API.

While comparing AI Spell Check APIs, it is crucial to consider different aspects, among others, cost security and privacy. AI Spell Check experts at Eden AI tested, compared, and used many AI Spell Checker of the market. Here are some actors that perform well (in alphabetical order):

  • Cohere
  • Ginger
  • GrammarBot
  • Grammarly
  • LanguageTool
  • Microsoft Bing
  • NLP Cloud
  • Open AI
  • ProWritingAid
  • Sapling

1. Cohere - Available on Eden AI

Cohere offers cutting-edge generative AI tools with advanced natural language processing (NLP) capabilities. Integrated into cloud computing platforms like Google Cloud and Amazon Web Services, Cohere's large language models (LLMs) provide accurate grammar and spelling corrections, along with versatile writing suggestions and recommendations. Tailored for enterprise customers, Cohere's custom models are designed to meet specific business needs, ensuring seamless integration into various applications and platforms. Moreover, Cohere's cloud-agnostic approach allows its models to operate on private clouds or with on-prem deployments, offering flexibility and accessibility for diverse use cases.

2. Ginger

Ginger Software is a leading provider of AI-powered grammar and spell check solutions, which can be integrated into various platforms and applications, including web browsers, mobile devices, and desktop applications. With its full document check feature, users can conveniently check multiple documents simultaneously. Ginger's API also offers comprehensive explanations and recommendations for mistakes, thanks to its advanced AI and NLP technology. Additionally, users can make use of synonyms and rephrase options for more versatile writing. The API is highly customizable, allowing developers to tailor the solution to their specific needs.

3. GrammarBot

GrammarBot leverages machine learning algorithms to analyze and correct grammar and spelling errors accurately and efficiently. This advanced technology allows GrammarBot to provide high-quality, real-time suggestions and corrections, making it an excellent tool for anyone who wants to improve their writing skills. Additionally, the API is user-friendly and easy to integrate into existing applications, providing a seamless experience for users.

4. Grammarly - Text Editor SDK

Grammarly’s AI engine - Text Editor SDK - uses machine learning algorithms to analyze and correct grammar and spelling errors in real time, providing users with comprehensive writing suggestions. One of the key benefits of Grammarly's API is its versatility, as it can be integrated into a wide range of applications, including web browsers, mobile devices, and desktop applications. Additionally, the SDK solution is constantly learning and improving, providing users with more accurate suggestions and corrections over time.

5. LanguageTool

The API provides basic support for 12 additional languages besides English and German, allowing users to check texts in multiple languages using a single API. Additionally, the spell-checking feature is based on the Hunspell dictionary, which is also used by LibreOffice/OpenOffice, but with more than 10,000 new entries, resulting in more accurate responses. As an added bonus, the API has over 2,000 error detection rules for English that go beyond normal spell-checking, allowing it to identify errors depending on the context. The text language can also be detected automatically with impressive performance (about 300 ms per 1000 characters).

6. Microsoft Bing - Available on Eden AI

The Bing Spell Check API is a powerful tool that leverages machine learning and statistical machine translation to provide accurate and contextually relevant corrections. With multiple spell check modes available, users can get corrections focused on grammar and/or spelling, and the API also has slang and informal language recognition capabilities. Bing can differentiate between similar words that sound alike but have different meanings, and can recognize new brands, titles, and other popular expressions as they emerge.

Furthermore, users can switch between spell correction for web searches and proofing documents using Search API v7. Bing also boasts new, improved error handling that includes capitalization, basic punctuation, and other features to diagnose and troubleshoot any problem queries easily.

7. NLP Cloud- Available on Eden AI

NLP Cloud provides state-of-the-art natural language processing (NLP) capabilities for AI grammar and spell check. Leveraging advanced machine learning algorithms, NLP Cloud offers real-time, accurate grammar and spelling corrections, as well as versatile writing suggestions and recommendations. The solution seamlessly integrates into various platforms and applications, including web browsers, mobile devices, and desktop applications. With a focus on delivering high-quality NLP capabilities, NLP Cloud ensures an enhanced writing experience for users, catering to a wide range of use cases across different industries.

8. Open AI - Available on Eden AI

Open AI’s solution uses the latest deep learning algorithms, including GPT-3, to provide accurate and contextually relevant suggestions for grammatical errors. It can identify and correct not only basic grammar and spelling errors but also more complex syntactical errors and inconsistencies in tone and style. OpenAI's Spell Checker is highly customizable, allowing users to fine-tune it to their specific needs and preferences. These features make OpenAI's Spell Check API a powerful tool for writers, students, and businesses looking to improve the quality of their written communication.

9. ProWritingAid - Available on Eden AI

ProWritingAid offers a comprehensive tool for AI Grammar Correction and Spell Check with a range of unique benefits compared to other solutions on the market. The API is designed to analyze written content for grammatical errors, spelling mistakes, style inconsistencies, and more. This Grammar Corrector has the ability to provide contextual suggestions and explanations, allowing users to understand why a particular error was flagged and how to correct it. Additionally, it checks for unwanted terms, including different forms and capitalizations, suggests corrections for entity spelling of millions of people, places and things. ProWritingAid's solution also provides suggestions for writing style, including poor readability, sentence variety issues, vague wording, and contextual thesaurus.

With its comprehensive features and contextual approach, ProWritingAid is a reliable choice for anyone who wants to improve their writing skills.

10. Sapling - Available on Eden AI

Sapling's API supports multiple languages and is customizable through the use of dictionaries and custom mappings, allowing users to tailor the service to their specific needs. The provider also offers prebuilt models for industries such as healthcare and medicine, making it an ideal solution for those working in specialized fields. In addition, the API provides thorough grammar, spelling, and stylistic edits for text, ensuring that content is not only free from errors but also reads smoothly and professionally.


Trinka delivers a powerful tool for real-time or passive grammar checks through a simple RESTful API that can be integrated into different applications. This makes it easy for users to incorporate Trinka's AI-powered grammar correction into their existing workflow. Additionally, the provider offers a file-edit API that supports unique workflow needs to avoid complex integrations and high volumes of API calls. Trinka's features include Style Guide Preference, Subject-specific Corrections, and Contextual Spelling.

Performance variations of Grammar and Spell Check APIs

For all companies who use Spell Check in their software: cost and performance are real concerns. The Spell Check market is quite dense and all those providers have their benefits and weaknesses.

Performances of Spell Check APIs vary according to the specificity of data used by each AI engine for their model training.

Performance variations across languages

AI Grammar and Spell Checkers perform differently depending on the language of the text and some providers are specialized in specific languages. Different specificities exist:

  • Region specialties: some Spell Check APIs improve their machine learning algorithm to make them accurate for text in specific languages spoken in particular countries or regions. For example, some APIs perform well in English (US, UK, Canada, South Africa, Singapore, Hong Kong, Ghana, Ireland, Australia, India, etc.), while others are specialized in Asian languages (Korean, Japanese, Chinese, etc.).
  • Rare language specialty: some Spell Check providers care about rare languages and dialects. You can find Spell Check APIs that allow you to process text in Gujarati, Marathi, Burmese, Pashto, Zulu, Swahili, etc.

Performance variations according to the quality of the text

Some Spell Check APIs trained their engine with specific data. For example, some AI Grammar Correctors have been trained on academic text, which can lead to difficulties when checking the grammar of social media posts. This is due to the informal language used on social media, such as slang, abbreviations, and emoticons.

Why choose Eden AI to manage your Spell Check APIs

‍Companies and developers from a wide range of industries (Social Media, Retail, Health, Finances, Law, etc.) use Eden AI’s unique API to easily integrate Spell Check tasks in their cloud-based applications, without having to build their own solutions.

Eden AI offers multiple AI APIs on its platform amongst several technologies: Text-to-Speech, Language Detection, Sentiment Analysis, Logo Detection, Question Answering, Data Anonymization, Speech Recognition, and so forth.

We want our users to have access to multiple Spell Check engines and manage them in one place so they can reach high performance, optimize cost and cover all their needs. There are many reasons for using multiple APIs:

  • Fallback provider is the ABCs: You need to set up a provider API that is requested if and only if the main Grammar & Spell Check API does not perform well (or is down). You can use confidence score returned or other methods to check provider accuracy.
  • Performance optimization: After the testing phase, you will be able to build a mapping of providers’ performance based on the criteria you have chosen (languages, fields, etc.). Each data that you need to process will then be sent to the best Spell Check API.
  • Cost - Performance ratio optimization: You can choose the cheapest Spell Check provider that performs well for your data.
  • Combine multiple AI APIs: This approach is required if you look for extremely high accuracy. The combination leads to higher costs but allows your AI service to be safe and accurate because Spell Check APIs will validate and invalidate each other for each piece of data.

How Eden AI can help you?

Eden AI is the future of AI usage in companies: our app allows you to call multiple AI APIs.

Multiple AI engines in one API

  • Centralized and fully monitored billing on Eden AI for all Spell Check APIs
  • Unified API for all providers: simple and standard to use, quick switch between providers, access to the specific features of each provider
  • Standardized response format: the JSON output format is the same for all suppliers thanks to Eden AI's standardization work. The response elements are also standardized thanks to Eden AI's powerful matching algorithms.
  • The best Artificial Intelligence APIs in the market are available: big cloud providers (Google, AWS, Microsoft, and more specialized engines)
  • Data protection: Eden AI will not store or use any data. Possibility to filter to use only GDPR engines.

You can see Eden AI documentation here.

Next step in your project

The Eden AI team can help you with your AI Grammar & Spell Check API integration project. This can be done by :

  • Organizing a product demo and a discussion to better understand your needs. You can book a time slot on this link: Contact
  • By testing the public version of Eden AI for free: however, not all providers are available on this version. Some are only available on the Enterprise version.
  • By benefiting from the support and advice of a team of experts to find the optimal combination of providers according to the specifics of your needs
  • Having the possibility to integrate on a third-party platform: we can quickly develop connectors.

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