Grammarly is a widely used AI-powered writing assistant that checks for grammar, spelling, punctuation, and style errors across various platforms. While it offers real-time suggestions, some users seek alternatives with deeper contextual understanding and customization.

Traditional grammar tools focus on fixing surface-level mistakes, but advanced AI assistants can now retain writing context, learn from past edits, and adapt to individual or team preferences.

In this article, we’ll explore free Grammarly alternatives that offer a wide range of features beyond grammar checks.

What makes the best Grammarly alternative?

If you're looking for a Grammarly alternative, grammar checking is a key feature, but what else can modern AI assistants offer beyond text correction? We’ve compiled a list of features that are particularly useful for daily work, especially for those handling high volumes of communication and data.

• Grammar and spell-checking: Any writing assistant should reliably catch grammar mistakes, spelling errors, and awkward phrasing. A good tool helps you write clearly and ensures your work is easy to read.
• Tone and style consistency: Advanced assistants can pick up on your preferred tone of voice—whether it's formal, friendly, or concise—and help maintain that tone across different messages and formats. This is especially helpful for teams that need to keep brand voice consistent or individuals using different communication styles.
• AI-powered suggestions: Beyond basic corrections, look for AI features that can rewrite sentences, suggest better word choices, or even summarize long emails and documents. These smart suggestions help you communicate your ideas more effectively.
• Memory and context retention: A standout feature in newer tools is the ability to remember your writing style, past edits, and even team preferences. Instead of starting from scratch each time, these assistants learn from your previous work and offer more relevant suggestions.
• Integrations with workplace tools: A good alternative should connect with the tools you use every day, such as Gmail, Slack, or Microsoft Teams so you could get writing help whether you’re sending an email, drafting a report, or chatting with your team.
• No-cost usability: The alternative should offer its core features without locking the most useful tools behind a paywall. Look for options that provide real value at no cost, so you can write confidently without worrying about hidden fees or limits.

Best free alternatives to Grammarly in 2025

If you’re exploring alternatives to traditional writing assistants and want something that goes far beyond grammar checking, some tools offer a powerful suite of AI features designed for professionals and teams who deal with constant communication, information flow, and collaborative work.

1. Tanka AI

Tanka is more than just a grammar checker, it's an AI-powered messenger designed to remember your team's past conversations and writing context. It’s a unique Grammarly alternative with features that remember context across conversations and past writing, ensuring that its suggestions are always relevant, including spelling and grammar corrections. Tanka’s long-term AI memory learns your tone, preferences, and writing patterns over time, making it a truly personalized writing assistant.

Key features

• Remembers your tone, context, and style: Tanka’s AI-powered long-term memory remembers your past conversations, project decisions, team preferences, and even the tone and writing style you use most. You don’t have to repeat context or rewrite the same types of messages from scratch—Tanka adapts and improves with you over time.
• AI-generated, ready-to-use business documents: Tanka now creates AI-powered documents like business plans, pitch decks, product PRDs, and websites. So you don’t have to start from scratch or write them yourself. By leveraging your team’s knowledge, past chats, and shared data, Tanka transforms scattered information into structured, professional-grade content automatically.
• Smarter writing and research assistance: Whether you're drafting an email or summarizing a meeting, Tanka’s suggestions are shaped by your past inputs, team vocabulary, and tone. It helps you stay consistent in voice and accurate in content.
• AI search that knows your work: Tanka’s AI search works across both public sources and your team’s internal content—including documents, emails, and past conversations—delivering quick, relevant results with clear sourcing.
• Centralized knowledge and team memory:
  Tanka’s Team Wiki and Co-Memory features turn your scattered files, notes, and documents into a structured, shared memory space. It’s a living knowledge base that AI assistants use to provide more relevant responses and help your whole team stay aligned.
• Smooth tool integration:
  Tanka works with your existing tools like Slack, Gmail, WhatsApp, Notion, and others so you can get AI support wherever you’re working. No need to switch between platforms—Tanka allows you to organize your communication in one place. 

Best for

Tanka is a good choice for SaaS teams, researchers, marketers, consultants, product managers, and business professionals who handle high volumes of written communication and need an AI assistant that goes beyond grammar correction.

Unlike traditional writing tools, Tanka doesn't just polish sentences—it understands what you’re working on, how you communicate, and what your team needs. 

Who can use Tanka?

Knowledge-heavy teams:
Tanka remembers technical terminology, past project decisions, and communication norms. Perfect for SaaS teams, product managers, and engineering leads who need consistent, context-aware responses across documents, emails, and chat.

Marketers and content creators:
Crafting brand-consistent messaging is easy when your assistant remembers your tone of voice. Tanka helps you maintain style across blog posts, social media copy, press releases, and emails—without constantly reminding it what your brand sounds like.

Researchers and analysts:
No need to dig through old files or rephrase complex ideas over and over. Tanka’s AI search surfaces relevant findings from past work, supports data-backed writing, and keeps your terminology and context intact.

Client-facing roles:
Sales, support, and customer success teams benefit from Tanka’s memory of past conversations. It helps draft responses, summarize threads, and adapt tone depending on the situation.

2. Hemingway Editor  

Hemingway Editor is a free, browser-based writing tool that helps users simplify their writing. It’s designed to make text clear and direct: it highlights passive voice, complex sentences, and overused adverbs, while also focusing on spelling errors and grammar.  

Key features

• The readability analysis: Highlights sentences that are hard to read, suggests simpler alternatives, and gives your writing a readability grade level so you can target the right audience.
• Style suggestions: Flags passive voice, overuse of adverbs, and complex phrases, helping write in a more active and engaging style.
• Color-coded highlights: Uses a color system to point out different writing issues, such as passive voice, adverbs, and complex sentences, making it easy to spot and fix problems.
• Distraction-free writing: Offers a clean interface with basic formatting options for focused drafting, and a quick switch to editing mode for instant feedback.

Best for

Tools like Hemingway Editor are great for writers who want to simplify their text, highlight passive voice, and trim unnecessary adverbs. With features like readability analysis, color-coded highlights, and a clean interface, it's useful for polishing shorter pieces or practicing more concise writing.

Read also: How to set Gmail auto reply with your own knowledge

3. QuillBot  

QuillBot is an AI-powered writing assistant with free grammar checks that's best known for its paraphrasing tool. It helps reword content while keeping the original meaning intact. You can also use it for grammar checking, summarizing, and citation generation. It offers various modes, like "Standard," "Fluency," and "Creative," to adjust the tone and style of your writing. QuillBot offers both a free plan and a premium version with more advanced features like multiple writing modes and a larger character limit.

Key features

• Paraphrasing tool: Rewrites sentences and paragraphs in multiple styles (Standard, Fluency, Creative, and more), allowing users to adjust tone and complexity while keeping the original meaning.
• Grammar checker: Identifies and corrects grammar, punctuation, and spelling errors in real time; supports several languages and integrates with platforms like Google Docs and Microsoft Word.
• Summarizer: Condenses long texts into key points or short paragraphs, making it easier to digest research, articles, or reports.
• Plagiarism checker and citation generator: Scans for unoriginal content and helps generate citations in various formats, useful for academic and professional writing.

Best for

QuillBot is well-regarded for its paraphrasing capabilities, offering multiple rewriting modes like Standard, Fluency, and Creative. It’s especially helpful for students, ESL learners, and writers who want to polish their phrasing or explore alternative ways to express an idea. With tools for grammar checking, summarization, and citation generation, it's a solid starting point for individual users looking to improve their writing.

4. Google Docs’ AI Writing Assistant 

Google Docs includes built-in AI writing features that help with grammar suggestions, tone adjustments, and style edits. It offers smart suggestions as you write, including rephrasing awkward sentences and highlighting typos. While not as advanced as standalone AI tools, it’s a convenient option for anyone already working in the Google ecosystem.

Key features

• AI text generation: Creates new content from prompts. Users can draft emails, letters, social media captions or other content. 
• Rewriting and refining: Easily rephrases, shortens, elaborates, or changes the tone (formal/casual) of existing text.
• Summarizing: Condenses long passages into key points or turn text into bulleted lists.
• Integrated feedback: Users can rate AI suggestions, helping Google improve the tool and personalize future outputs.

Best for

Google Docs’ AI Writing Assistant is a good choice for people who want to draft, rewrite, or refine text directly within their documents. This includes students, professionals, content creators, and anyone who needs quick help generating new content, rephrasing sentences, or adjusting tone and detail.

Read also: AI Sales Assistant: Intelligent Selling Strategies

5. LanguageTool  

LanguageTool is an open-source grammar and style checker available in multiple languages. It goes beyond grammar correction, and offers tone suggestions and writing improvements. It works as a browser extension, on Google Docs, or as a desktop app.

Key features

• Grammar and spelling checks: Detects and corrects grammar, punctuation, and spelling errors in real time.
• Multilingual support: Covers more than 30 languages and dialects, making it a good choice for international teams and non-native English speakers.
• Style and clarity suggestions: Offers advice on improving style, word choice, and readability, including features like “Picky Mode” for advanced style checks.
• Integrations: Works with Google Docs, Microsoft Word, major browsers, and other writing apps for in-context corrections.

Best for

LanguageTool is a strong grammar and style checker with broad multilingual support and a user-friendly experience. It’s especially helpful for non-native speakers, international teams, and anyone writing in multiple languages. With real-time corrections, tone suggestions, and integrations with tools like Google Docs and browsers, it covers the basics very well.

Why AI memory is the next step in writing assistance

Most writing tools focus on fixing mistakes in a single sentence or document. While this is helpful, it often means you have to repeat your preferences or re-explain your context every time you write. AI memory changes this approach by remembering your writing style, past edits, and even the context of previous conversations.

With a tool like Tanka AI, you don’t have to remind your assistant about your preferred tone or the details of an ongoing project. It keeps track of your team’s communication, making sure emails, reports, and social media posts stay consistent in both tone and style. This is especially useful for teams who want to maintain a unified voice across different channels.

Writing assistants with AI memory also help improve clarity and reduce repetition. By remembering what’s already been discussed or edited, these tools can offer more relevant suggestions and prevent users from repeating information. This leads to more efficient communication, saving time and helping everyone improve their writing skills and stay on the same page.

You might be interested in AI Email Responder: Automate Your Inbox Easily

How to choose the best AI writing assistant

Choosing the right AI writing assistant depends on what you need from the tool.

• If you need simple grammar checking: Tools like Grammarly, Hemingway Editor, and LanguageTool do a brilliant job catching errors and improving readability score without extra features.
• If you want AI-powered sentence rewrites: QuillBot is a good option. It helps rephrase and refine your sentences, fixes average sentence lengths with different tone and style choices.
• If you need an AI that remembers your writing style and context: Tanka stands out. Its long-term AI memory keeps track of your tone, preferences, and past conversations, making suggestions more relevant and consistent over time.

Picking a tool that fits your specific writing habits and workflow will help you get the most out of AI assistance.

AI writing assistants: comparison table

Conclusion: why Tanka AI is the best free Grammarly alternative

AI memory is shaping the future of writing assistance, moving beyond simple grammar fixes to smarter, context-aware support. Tanka AI stands out as the best free Grammarly alternative because it remembers your writing context, learns your tone and preferences over time, and integrates with workplace tools like Slack, Gmail, Notion, WhatsApp, and more. With Tanka, your emails, reports, and team messages stay consistent and clear—across any platform or tool you use. And with its ability to extract knowledge and generate structured content like business plans, pitch decks, and PRDs, Tanka goes far beyond writing assistance - becoming a true AI co-pilot for your work.

Experience smarter AI writing with Tanka - try it free today! 

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