ProWritingAid
Grammarly
Hemingway
LanguageTool
QuillBot
Ginger
Wordtune
Writefull
ForthWrite
Superhuman
Gemini
Lavender
Mailmeteor
Spark Mail
ForthWrite is an AI email writing assistant for Gmail and Outlook that learns your writing style from your real sent mail. The more you use it, the more it sounds like you. Get smart drafts in seconds, auto-draft replies before you open your inbox, and maintain your personal voice at scale. Free to start, no credit card required. Works inside Gmail and Outlook on the web.
How it works
ForthWrite captures your tone, sentence rhythm, and sign-offs from your actual sent emails, then uses that profile to generate drafts that match how you write, not a generic AI voice. Every draft you edit or send improves the model over time.
Key features
Who uses it
Professionals who send high volumes of relationship-critical email: lawyers, financial advisors, recruiters, account executives, founders, and anyone who wants their inbox handled without sounding like a chatbot wrote it.
Pricing
Free tier includes 10 drafts per week with no credit card required. Paid plans start at $12/month and include unlimited drafts, custom persona prompts, and auto-draft.
ProWritingAid ForthWriteProWritingAid is recommended for authors, bloggers, content writers, and students looking to improve their writing. It is particularly useful for writers who want to focus on both style and grammar, as well as for those looking to produce polished, professional-quality work. It's an excellent choice for any writer who appreciates detailed feedback and analytics.
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ForthWrite's answer:
Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API
ForthWrite's answer:
ForthWrite learns your writing style from your actual sent mail, not a generic prompt. Every draft sounds like you wrote it because it was trained on how you actually write. It also auto-drafts replies before you open your inbox, so your email is partially handled before your day starts.
ForthWrite's answer:
Most AI email tools give you a blank box and a "write for me" button. ForthWrite builds a voice profile from your sent history and gets more accurate with every draft you edit or send. Unlike ChatGPT or Gemini, it works natively inside Gmail and Outlook with no copy-paste. Unlike Lavender, it writes the draft, not just scores it.
ForthWrite's answer:
Professionals who send high volumes of relationship-critical email and cannot afford to sound generic: lawyers, financial advisors, recruiters, account executives, consultants, and founders managing their own inbox.
ForthWrite's answer:
Built out of frustration with AI writing tools that produce text that sounds nothing like the person sending it, and as a way to handle large amounts of daily email. The core insight was that your sent mail is the best training data you already have, and no tool was using it.
I've tried other proofreading programs and found them to be very limited. ProWritingAid is the only program I know of that has a built-in grammar checker. Also, the free version has a lot of features that paid versions don't have, so I highly recommend it. This program is great for students who want to improve their writing skills. It's especially helpful for those who write in other languages, because the grammar checker can help you spot errors in your translations.
This software is great for all of my writing projects and I love that I can use it for business and personal. I recommend it for all of my clients who need proofreading and editing help.ย I use this software for all of my writing projects, whether I am proofing my own work or that of my clients. I can use this software to easily check my grammar, spelling, and consistency, and provide feedback. This software helps me to become a better writer!
I built ForthWrite because I kept sending emails that sounded like they came from the same generic AI as everyone else. After launching it, I still use it for my own inbox every day, which is about the most honest endorsement I can give.
The Chrome extension lives inside Gmail and Outlook on the web. Open a thread, hit Alt+Shift+D, and a draft comes back in your voice, not a template. The free tier is real: 10 drafts per week, no API key, no credit card. Voice matching is included on free, because that is the point.
What keeps it useful compared to Gemini or a chat tab: it learns from what you actually send. Every edit you make before hitting send becomes a signal. Over time the drafts drift closer to how you really write, and the dashboard shows the improvement curve so you can see it happening.
The web compose surface lets you draft from forthwrite.ai without installing anything, useful for people who want to try before committing to the extension.
Standard adds recipient-aware and intent-aware drafting plus AI coaching. Pro adds auto-draft (replies waiting when you open Gmail), batch replies, and Prompt Lab for version-controlling your prompts. Teams adds a shared persona and seat-level analytics.
ForthWrite is not for everyone. If you just need quick replies and tone does not matter, Gemini is free and already in your inbox. ForthWrite is for people where tone does matter: client communication, relationship-driven threads, external correspondence where sounding off costs something real.
Disclosure: I am the founder and use it daily. Happy to answer questions in the comments.
Based on our record, ProWritingAid seems to be more popular. It has been mentiond 66 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
ProWritingAid (https://prowritingaid.com) | Remote | Full-time | Contract ProWritingAid helps you craft, polish, and elevate your writing. - Browser Extension & SPA TypeScript Developer (TypeScript, Angular, Jest, Lerna, Webpack, LESS) - https://pwa.notion.site/Browser-Extension-SPA-Developer-Contract-3034fb0a1e6648c98e897830800ab6d1. - Source: Hacker News / almost 2 years ago
ProWritingAid: ProWritingAid ProWritingAid is a comprehensive writing assistant that offers grammar and style checking, as well as tools for improving readability, consistency, and overall writing quality. It provides detailed feedback and suggestions to help users polish their writing. - Source: dev.to / over 2 years ago
Back in 2019, I made an advanced MS Word add-in spellchecker that integrates the ProWritingAid API to spot all the errors in an interactive way where you just hover over a misspelled word or an incorrect expression and a popup shows at the mouse pointer's position where you can quickly correct the word with suggestions, or open a task pane on the right side of the active document for more advanced features. The... - Source: Hacker News / over 2 years ago
Other resources I use -- ProWritingAid, my computer built-in Dictionary (it has its own thesaurus tab) and getting a second pair of eyes. Finding a trusted beta helps so much. Source: almost 3 years ago
ProWritingAid: Includes all the features of Hemingway, plus much much more. Grammar checking, word echo checking, style checking, passive voice monitoring, etc, etc. ProWritingAid is a really powerful piece of editing software. Honestly, a little too much for some folks, imho. If you do end up picking this one, I'd recommend choosing a few editing features to use- using too many would cut into your author voice,... Source: about 3 years ago
Grammarly - Clear, effective, mistake-free writing everywhere you type.
Superhuman - Superhuman is an email management tool.
Hemingway - Hemingway App makes your writing bold and clear.
Gemini - Gemini, formerly known as Bard, is a generative artificial intelligence chatbot developed by Google. Based on the large language model (LLM) of the same name, it was launched in 2023 in response to the rise of OpenAI's ChatGPT.
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
Lavender - Realtime coaching for sales emails.