Writing letters—whether for jobs, business, or personal reasons—often feels time-consuming. That’s where AI letter writing platforms come in, helping you create polished drafts in minutes. These tools are becoming more popular every year.
In fact, as of 2025, about 35% of people use AI tools daily, and the AI writing software market is already worth $1.7 billion, growing at more than 25% each year. With millions of people worldwide now relying on AI for communication, it’s clear that letter writing has entered a new, smarter era.
In this article, we’ll explore the top 15 best AI letter writing tools, their features, and how they can make your writing easier and faster.
Benefits of Using AI Letter Writing Tools
- Save hours of writing time – Instead of starting from scratch, these tools generate ready-to-use drafts within seconds, letting you focus on fine-tuning rather than struggling with wording.
- Enhance professionalism – AI ensures correct grammar, spelling, and formatting so your letters leave a strong impression on employers, clients, or colleagues.
- Adapt tone and style – Whether you need a polite business proposal, a formal resignation letter, or a warm personal note, AI can match the right tone for your audience.
- Overcome writer’s block – By providing multiple variations of the same letter, these tools help you find the right words even when you feel stuck.
- Support global communication – Many tools offer translations and multi-language output, making it easy to communicate with people around the world.
Things to Consider Before Choosing an AI Letter Writing Tool.
- User-friendly design – A simple dashboard and easy navigation make it faster to create letters without needing technical knowledge.
- Language and format flexibility – Ensure the tool supports the languages you use and provides templates for different letter types like cover letters, business correspondence, or personal notes.
- Level of personalization – Some AI tools let you add details like recipient names, company info, or tone preferences to make letters feel more authentic.
- Integration with daily tools – Check if the software connects with platforms like Gmail, Microsoft Word, or Google Docs for smooth workflow.
- Pricing and value for money – Compare free versions, trial periods, and premium subscriptions to choose a tool that balances cost with useful features.
List of Best AI Letter Writing Tools
1. Jasper AI
Website: https://www.jasper.ai
One of the most sophisticated AI-powered writing tools is Jasper AI, which is generally known to be able to produce high-quality content, including professional and personal letters. Jasper is based on the strong natural language processing (NLP) model and thus can comprehend the surrounding and the tone, and it is simpler to compose a personalized letter as part of the business proposal, job application, and even friendly notes. Jasper takes a few minutes to write a letter with its tailor-made templates, and you only have to type down a few details.
The other feature that is to be highlighted is the capacity of Jasper to adjust tones and styles. Jasper knows how you would want your letter to sound persuasive, formal or conversational and so it does. It also serves more than 25 languages hence it is very helpful in international communication. The inbuilt grammar check and plagiarism test also makes your letters higher quality and original as it is a tool that makes your letters free of errors and plagiarism.
Top Features & Working:
- Customizable letter templates
- Tone and style adjustment
- Multi-language support
- Grammar and plagiarism checks
- Easy collaboration with team members
Pricing:
| Pro | Business |
| $59/mo | Custom |
02. Copy.ai
Website: https://www.copy.ai/
Another brilliant tool in writing AI-generated letters is Copy.ai. It has a user-friendly interface, which enables a person to write powerful drafts in a short time. You can use a formal resignation letter or a recommendation request or even a personal thank-you note, all of them are customized by Copy.ai. All one needs to do is to type in some keywords or information and the tool will generate a complete draft that can be used.
Copy.ai is creative and versatile. It is particularly useful to those users that have writer-block problems. The tool allows you to select an option that best fits your purpose by providing a number of variations of a draft. It can also be used easily with other writing processes hence it fits well with individuals and businesses.
Top Features & Working:
- Wide range of letter templates
- Multiple draft variations for each request
- Friendly and user-focused interface
- Fast generation with minimal input required
- Useful for both formal and informal letters
Pricing:
| Chat | Agents |
| $29/mo | $249/mo |
03. Writesonic
Website: https://writesonic.com/
Writesonic is a very flexible AI writing assistant which produces a wide array of content including professional letters. Its user-friendly platform allows you to draft business communication, cover letters, appreciation notes and even apology letters. Writesonic comes up with perfectly formatted drafts of your needs by entering a small description of what you want.
Writesonic is also strong in terms of its SEO-friendly and persuasive style of writing which can be easily recreated on business letters and proposals. It provides you with a choice of toning, length of wording and even creativity levels, and thus you get a chance to customize the letter to your needs. This is what makes it a powerful competitor in the AI letter writing tools.
Top Features & Working:
- Wide content coverage, including letters
- Adjustable tone and creativity settings
- User-friendly editing tools
- Time-saving AI suggestions
- Affordable plans for individuals and businesses
Pricing:
| Lite | Standard | Professional | Advanced | Enterprise |
| $39/mo | $79/mo | $199/mo | $399/mo | Custom |
04. Rytr
Website: https://rytr.me/
Rytr is affordable, and a powerful AI writing tool, which is specialized in creating quality letters and documents with little intervention. You can create a business, academic or personal letter by just a few clicks because of its smooth interface. The choice of type of letter, tone, and words both give you a professional draft which can be further edited to fit your requirements.
The only thing that is appealing about Rytr is its low cost and powerful performance. It is available to generate unlimited words on premium plans and has more than 30 languages. Its AI is aimed at preserving the flow of coherence and context all through the letter making it readable by a professional. The formatting and grammar correction options are also welcome by the users.
Top Features & Working:
- Pre-built templates for various letters
- Support for 30+ languages
- Context-aware AI output
- Affordable and scalable pricing plans
- Built-in grammar correction
Pricing:
| Free | Unlimited | Premium |
| $0 | $7.50/mo | $24.16/mo |
Also Read: AI Development Skills
05. Simplified
Website: https://simplified.com/
Simplified is a content creation platform that is all-in-one and has an AI-based letter generator. It particularly fits well with business and professionals in need of fast solutions. Its dashboard is user-friendly to create customized letters in case you want to invite someone, communicate professionally, or do human resource needs. The time-saving aspect of the tool is that it will automatically format your letter into a professional format.
Simplified is a multi-purpose platform as it also has tools of graphic design, social media management and content creation besides letter writing. The artificial intelligence writing coach in Simplified makes certain that your mails are grammatically right, tone suitable, and appropriate to your particular purpose.
Top Features & Working:
- AI-powered personalized letter generator
- Professional formatting assistance
- Multi-purpose platform (design + writing)
- Time-saving, user-friendly interface
- Suitable for individuals and teams
Pricing:
| Pro | Business | Grow |
| $14.89/mo | $33.12/mo | $101.25/mo |
06. QuillBot
Website: https://quillbot.com/
QuillBot is best known for its AI-powered paraphrasing and writing assistance, but it also works wonderfully for drafting professional and personal letters. By inputting your key points, QuillBot generates structured drafts that you can refine. It provides multiple writing modes such as formal, simple, and creative, allowing you to match the tone of your letter perfectly.
Another major benefit of QuillBot is its built-in grammar and plagiarism checker. This ensures that your letters are not only polished but also original. For professionals and students who want accuracy and clarity in communication, QuillBot stands out as a reliable tool. Its Chrome extension and integrations with Google Docs make letter writing more accessible.
Top Features & Working:
- Paraphrasing and draft generation
- Tone customization modes
- Built-in grammar and plagiarism check
- Integrations with Google Docs & MS Word
- Chrome extension for quick writing support
Pricing:
| Free | Premium |
| $0 | $4.17/mo |
07. GrammarlyGO
Website: https://www.grammarly.com/
Grammarly has been the go-to tool for grammar and style corrections, and with GrammarlyGO, it takes a step further into AI-powered content generation, including letter writing. This tool can draft professional letters such as cover letters, resignation notes, or business proposals by simply asking it what you need. It also suggests tone adjustments and ensures grammatical perfection.
What makes GrammarlyGO unique is its context-awareness. It learns from your past writing style and adapts letters accordingly. Whether you want a concise draft or a detailed explanation, GrammarlyGO tailors the output. Its seamless integration across email, browsers, and word processors makes it ideal for everyday letter writing.
Top Features & Working:
- AI-powered letter draft generation
- Personalized tone suggestions
- Context-aware writing
- Advanced grammar and clarity corrections
- Integrations with email and browsers
Pricing:
| Free | Pro | Enterprise |
| $0 | $11.17/mo | Available on request |
08. Anyword
Website: https://www.anyword.com/
Anyword is mainly an AI tool that is marketing-oriented, although it is also outstanding when it comes to writing letters. It is also effective when it comes to business and sales-related letters because it is specialized in creating persuasive messages that are directed to the audience. Through purpose and intended impact, Anyword is able to produce drafts that are not only professional, but also engaging.
The other attribute that distinguishes Anyword is the predictive performance scoring. It measures the effectiveness of your letter in regard to legibility and attractiveness. This can particularly come in handy when reaching out to people through letters, communicating with the clients, and where partnership proposals are involved where impact will matter.
Top Features & Working:
- Persuasive letter generation
- Predictive performance scoring
- Customizable tone and style
- Data-driven AI suggestions
- Great for sales, business, and outreach letters
Pricing:
| Starter | Data Driven | Business | Enterprise |
| $49/mo | $99/mo | Custom | Available on request |
09. ChatGPT (by OpenAI)
Website: https://chat.openai.com/
ChatGPT has turned out to be one of the most famous AI tools in generating a natural and human-like text, thus making it a perfect selection when it comes to writing letters. It can immediately draft your email requirements (professional or not), formal application letter, or a personal friendly note, depending on what you input. All you need to do is to give the context, tone, and essential information and the AI will write a full letter.
ChatGPT is strong because it is flexible. It does not confine you to templates; it is actually customized to your requirements on the spot. You will be able to demand revisions and alter tonal variation or request even several different versions of the same letter. It has integrations with apps, websites, and productivity platforms, which makes it a versatile tool that can simplify the writing process of anyone willing to use it.
Top Features & Working:
- Flexible and conversational letter generation
- Customizable tone and context
- Real-time editing and variations
- Easy integration with apps and platforms
- Suitable for both formal and casual letters
Pricing:
| Free | Go | Plus | Pro |
| $0 | $0 | $20/mo | $200/mo |
10. Wordtune
Website: https://www.wordtune.com/
Wordtune is designed to enhance clarity, tone, and style, making it an excellent AI tool for letter writing. Unlike some tools that generate full drafts, Wordtune focuses on improving and rephrasing your writing to make it more effective. If you’ve drafted a rough letter, Wordtune can refine it into a professional, polished version.
The tool offers multiple rephrasing options so you can pick the style that best fits your intent—whether formal, casual, or persuasive. Its Chrome extension makes it accessible directly while writing emails or documents. This makes Wordtune especially useful for professionals who want to elevate their communication without losing their personal touch.
Top Features & Working:
- AI-powered rewriting and rephrasing
- Tone and clarity enhancement
- Multiple suggestions for each sentence
- Chrome extension for easy use
- Great for refining letters and emails
Pricing:
| Basic | Advanced | Unlimited |
| $0 | $6.99/mo | $9.99/mo |
11. INK for All
Website: https://inkforall.com/
INK for All is a powerful AI-based writing assistant that can be used to compose effective messages, even professional letters. It is a mixture of AIs writing and optimization of SEO and suits a person and a business alike when they need to have their letters sounding clear and persuasive, and be effective. INK will write you a refined draft within a few seconds by typing in a few specifics and writing to your audience and your own tone.
The key distinction of INK is the lack of distraction and great optimization capabilities. Although aimed at content creators, it has the capacity to be used in letter writing, as well as in writing a cover letter, proposal, or thank-you note. The AI allows keeping the message succinctly and making it professional and interesting.
Top Features & Working:
- AI-powered personalized letter drafts
- Tone and audience customization
- Built-in SEO optimization (extra benefit for professionals)
- Clean, distraction-free writing workspace
- Grammar and clarity improvement tools
Pricing:
| Professional | Enterprise |
| $39/mo | $99/mo |
Also Read: All SMO Tools
12. Writecream
Website: https://www.writecream.com/
Writecream is an artificial intelligence writing assistant that is able to save time by creating quality written communication, such as letters, cold emails, and LinkedIn messages. It is more popular in particular with the professionals who want to design personalized communication at a large scale. Writecream produces polished, professional and intentional letters with the help of their simple input process.
One of the strengths of Writecream is that it is customized. It is able to incorporate recipient specific information automatically so that your letter does not appear so robotic and more natural. This is very handy in outreach correspondence, job applications or communication with clients. It is also multi-purpose as it allows voiceovers and audio messaging as well as text.
Top Features & Working:
- AI-generated professional and personal letters
- Personalized recipient-focused content
- Multiple templates for different letter types
- Supports voiceovers and audio outputs
- Timesaving for business and outreach communication
Pricing:
| Free | Unlimited |
| $0 | $9.01/mo |
13. HyperWrite
Website: https://www.hyperwriteai.com/
HyperWrite is a high-ranking AI assistant that assists users in writing well-formatted and creative letters. Also, in contrast to simple AI generators, HyperWrite has real-time suggestions and autocompletes as you type, providing you with control whilst accelerating the writing. HyperWrite fits your requirements whether it is an official resignation letter, a casual note or an academic recommendation.
The difference with HyperWrite is that it can learn your individual style as time goes by. It makes your letters look more real and less artificial intelligence. It comes as a browser extension, and therefore, one can use it when writing emails or writing documents without moving to another platform.
Top Features & Working:
- Real-time AI writing suggestions
- Personal style learning for authentic letters
- Autocomplete and rewrite assistance
- Browser extension for easy use
- Suitable for formal, casual, and academic letters
Pricing:
| Premium | Ultra |
| $16/mo | $29/mo |
14. TextCortex
Website: https://textcortex.com
Another powerful AI tool is TextCortex which focuses on the generation of professional communication. It has an option to write letters personally where the user can type in a brief prompt and make a letter. It is able to generate cover letters and job applications all the way to customer service response and personal notes.
The tool is productivity oriented. It can be integrated with browsers, Gmail and Microsoft Word hence writing letters is easy since it can be done in your work area. TextCortex is also capable of rewriting, expanding and shortening text, and this is especially helpful when one is fine-tuning letters and making them readable and impactful.
Top Features & Working:
- AI-generated letters based on short prompts
- Browser, Gmail, and Word integrations
- Rewrite, expand, and shorten options
- Supports multiple languages
- Great for job seekers and professionals
Pricing:
| Free | Premium | Enterprise |
| $0 | $23.99/mo | Available on request |
15. SmartWriter.ai
Website: http://smartwriter.ai
SmartWriter.ai is tailored for outreach and professional communication, making it one of the best AI tools for business-related letter writing. It specializes in generating hyper-personalized letters and emails that resonate with recipients. With its AI-driven personalization, SmartWriter ensures your letters feel human, unique, and impactful.
Beyond letters, SmartWriter.ai is also useful for sales teams and marketers who need large-scale communication. Its data-driven approach pulls in contextual details about recipients, ensuring that every letter is relevant. This makes it particularly effective for cover letters, sales outreach, and client proposals.
Top Features & Working:
- Hyper-personalized letter generation
- Great for business and sales outreach
- Data-driven contextual writing
- Saves time for professionals and teams
- Ensures high engagement and response rates
Pricing:
| Basic | Popular | Pro |
| $49/mo | $124/mo | $299/mo |
Comparison Table: AI letter writing tool.
| Tool | Top Features | Website | Pricing |
| Jasper AI | Customizable templates, Tone adjustment, Multi-language, Grammar & plagiarism check, Team collaboration | Jasper AI | Pro $59/mo, Business Custom |
| Copy.ai | Wide range templates, Multiple draft variations, Easy interface, Fast generation, Formal/informal letters | Copy.ai | Chat $29/mo, Agents $249/mo |
| Writesonic | Letters, Adjustable tone, Editing tools, SEO style, Customizable creativity | Writesonic | Lite $39/mo, Standard $79/mo, Pro $199/mo, Advanced $399/mo, Enterprise Custom |
| Rytr | Templates, 30+ languages, Context-aware, Grammar correction, Affordable | Rytr | Free, Unlimited $7.50/mo, Premium $24.16/mo |
| Simplified | AI letter generator, Professional formatting, Multipurpose platform, Easy to use | Simplified | Pro $14.89/mo, Business $33.12/mo, Grow $101.25/mo |
| QuillBot | Paraphrasing, Tone modes, Grammar check, Google Docs integration, Chrome extension | QuillBot | Free, Premium $4.17/mo |
| GrammarlyGO | Letter drafts, Tone suggestions, Context-aware, Grammar correction, Integrations | GrammarlyGO | Free, Pro $11.17/mo, Enterprise Custom |
| Anyword | Persuasive letters, Performance scoring, Custom tone, Sales focus | Anyword | Starter $49/mo, Data Driven $99/mo, Business Custom, Enterprise Custom |
| ChatGPT (OpenAI) | Flexible letter generation, Customizable tone, Real-time editing, Integrations | ChatGPT | Free, Go $0, Plus $20/mo, Pro $200/mo |
| Wordtune | Rephrasing, Tone enhancement, Sentence suggestions, Chrome extension | Wordtune | Free, Advanced $6.99/mo, Unlimited $9.99/mo |
| INK for All | Personalized letters, Tone customization, SEO optimization, Grammar tools | INK for All | Professional $39/mo, Enterprise $99/mo |
| Writecream | AI letters, Personalization, Templates, Voiceovers, Outreach focus | Writecream | Free, Unlimited $9.01/mo |
| HyperWrite | Real-time suggestions, Learns personal style, Autocomplete, Browser extension | HyperWrite | Premium $16/mo, Ultra $29/mo |
| TextCortex | Prompt-based letters, Integrations (Gmail, Word), Rewrite/expand/shorten | TextCortex | Free, Premium $23.99/mo, Enterprise Custom |
| SmartWriter.ai | Hyper-personalized, Business & sales, Contextual writing, Outreach focus | SmartWriter.ai | Basic $49/mo, Popular $124/mo, Pro $299/mo |
Conclusion
In summary, AI letter writing helps to speed up, simplify, and improve writing style. You can now write creative, professional, and personalized text in a matter of minutes using AI. AI letter writing saves time, but an AI application can also improve the tone, grammar, and completeness of any letter. Whether it be a personal letter, business proposal and/or job application, AI writing has a message that is concise and clear. As technology continues to adapt and evolve, AI letter writing will probably become part of daily communication.
FAQs
Do I need advanced technical skills to use AI letter writing tools?
No, most of these tools are designed to be very user-friendly. You simply enter a few details or prompts, and the tool generates a draft for you.
Will the letters created by AI be unique?
Yes, the letters are usually original and tailored to your inputs. Some platforms even include plagiarism checkers to ensure your content is unique.
Can AI tools help if I need to write letters in another language?
Many AI tools support multiple languages, which makes it easy to draft letters for international communication without needing a translator.