AI email writer that sounds like you.

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June 22, 2026

2026 Rank: #2350

ForthWrite

United States Email writing

5.0(1)1

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5.0(1)1

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AI email writer that sounds like you.

API AI Writing Tool Automated Email Drafting Email Writing Tool Personalized Writing Style Automated Email RepliesFree + from $12/mo

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Overview

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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.

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

- Auto-draft: replies waiting in Gmail before you open your inbox
- Voice matching from your real sent mail, not templates
- Recipient-aware drafts that adapt to who you are emailing
- Prompt Lab for version-controlling and A/B testing your persona prompt
- BYOK support: bring your own API key for Claude, OpenAI, Grok, Mistral, and more
- Works in Gmail and Outlook on the web, plus a standalone browser widget
- Training data export and full data portability

Start a 30-Day Free Pro Trial (no code needed, just follow the link):
https://www.forthwrite.ai/redeem/TAAFT30

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Initial release

June 22, 2026

Initial release of ForthWrite.

Author

Curtis Boortz

@curtis-boortz

🇺🇸 United States

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1 tool

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Joined: June 2026

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Freemium

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$12/month

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Monthly

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60-day money-back guarantee. If it doesn't sound like you, we'll fix it or refund everything.

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Email writing ForthWrite

United States Email writing

5.0(1)1

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Curtis Boortz

🛠️ 1 tool 🙏 1 karma

Jun 19, 2026

@ initial release

Rated it

@ForthWrite

I've tried a lot of AI email tools and they all produce the same generic output. ForthWrite is different because it actually learns from the gap between what it drafts and what I end up sending. After a few weeks the drafts need almost no editing. Works right inside Gmail via the Chrome extension, so there's no new app to learn. The 60-day guarantee made it easy to commit. Highly recommend for anyone who sends a high volume of professional email.

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Pros and Cons

Pros

Learns your writing style

Saves significant email time

Supports multiple AI models

No training setup required

Voice accuracy improves over time as more sent emails are collected

Batch-draft entire inbox with one click

Auto-drafts incoming emails

Context-aware thread understanding

Can bring your own API for a discount

Detailed performance analytics

Free plan available

View 6 more pros

Cons

Limited to Gmail, Outlook

Model is pre-selected based on tier unless you provide your own API key

Data Wiping may lose personalization

Limited weekly drafts on free plan

Dependence on Chrome/Microsoft Marketplace for extension

Q&A

What is ForthWrite and how does it work?

ForthWrite is an AI-powered email writer designed to learn each user's unique writing style and form emails accordingly. The more emails a user sends, the more refined and accurate ForthWrite becomes. By integrating with email platforms like Gmail and Outlook, ForthWrite provides seamless functionality right inside the user's inbox. Featuring tools like Voice Match and Prompt Lab, ForthWrite can draft emails in the user's voice, while also offering the ability to manage prompts and make data-driven revisions ensuring the user's writing style is accurately mirrored.

What type of AI models does ForthWrite use?

ForthWrite utilizes a wide range of AI models such as OpenAI, Claude, Gemini, Grok, DeepSeek, Mistral, Perplexity, Cohere, and LibreChat. The choice of multiple AI models ensures that ForthWrite has a broad and comprehensive understanding of various prompts, enabling shorter learning curves and adaptability across different writing styles.

What is the 'Voice Match' feature in ForthWrite?

Voice Match is a proprietary feature of ForthWrite that analyzes a user's sent emails to capture their unique writing traits including tone, sentence rhythm, and signature sign-offs. As Voice Match progressively learns these traits, it helps ForthWrite compose emails that closely mimic a user's writing style, offering a more personalised and realistic experience.

Can ForthWrite be used with email platforms like Gmail and Outlook?

Yes, ForthWrite is designed to be seamlessly integrated with popular email platforms such as Gmail and Outlook. This integration offers users the convenience of drafting AI-assisted emails directly from their inbox, eliminating the need to switch between different applications.

What is the 'Prompt Lab' feature in ForthWrite?

The 'Prompt Lab' is a feature in ForthWrite that enables users to manage their prompts effectively. It allows users to test their prompts against their previously sent emails and receive suggestions based on their data for potential revisions. This iterative approach of testing and revising ensures the generated drafts improve in mirroring the user's distinct writing style.

How does ForthWrite handle data privacy?

ForthWrite prioritizes data privacy by following a 'Bring Your Own Key' principle. This means ForthWrite encrypts users' sent emails. The emails are isolated to each user's account and are never shared or used in shared models. Essentially, users maintain total control over their data by being the sole key holders.

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What is the 'Bring Your Own Key' principle that ForthWrite operates on?

The 'Bring Your Own Key' principle followed by ForthWrite is a data privacy measure. It means that sent emails from a user are stored for learning the user's voice, but they are encrypted and tied exclusively to the user's account. They are not shared with other users nor used in training shared models. It is a way to secure the user's data and keep it isolated.

How does one manage prompts in ForthWrite?

In ForthWrite, prompts can be managed using the 'Prompt Lab' feature. Users can version-control their prompts, test them against their previously sent emails, and receive data-driven suggestions that can be used for revising and refining prompts. The facility to manage prompts allows for efficient optimization and aids in producing more accurate and personalized drafts.

What does ForthWrite mean by 'a unique training set is created for each user'?

When ForthWrite mentions 'a unique training set is created for each user', it means that the AI develops a distinct learning database from a specific user's sent replies and accepted drafts. This unique set of data aids in sharpening the AI's understanding of the individual user's writing style and tone, thereby improving the personalization and authenticity of future drafts.

How can I export my data from ForthWrite?

ForthWrite provides users with the option to export their data whenever they wish. Though specific steps are not outlined on their website, the feature reaffirms ForthWrite's commitment to user data privacy and ownership.

Does ForthWrite require any setup or training?

ForthWrite requires no setup or training. It is designed to adapt and learn from the user's inputs progressively, eliminating the need for any specialized training or complex setup procedures. You can start using it right away with its seamless integration to Gmail and Outlook.

How does ForthWrite emulate my writing style?

ForthWrite emulates a user's writing style by learning from the user's previous sent emails and accepted drafts. The AI understands the tone, sentence rhythm, typical sign-offs, and more, thereby enabling it to form highly personalised drafts that sound very much like the user. The model improves with each additional email sent to provide a sharply accurate emulation.

How can ForthWrite save time when drafting emails?

ForthWrite can drastically save time when drafting emails by creating AI-assisted drafts implicitly in the user's voice. Rather than the user having to write each email from scratch, ForthWrite forms the drafts based on the user's unique writing style. Therefore, the user only needs to review and send the drafted emails, significantly cutting down on time expended on email composition.

What kind of data does ForthWrite Performance Analytics provide?

ForthWrite's Performance Analytics feature provides various useful data such as the acceptance rates of the drafts, similarity scores that show the likeness between user's writing style and the drafts created, and the time saved by using this AI tool. As such, it offers users insights into how successfully ForthWrite is emulating their personal writing style and the efficiency gained.

How does the 'ForthWrite for Outlook' function?

ForthWrite functionally integrates with Outlook, the same way it does with Gmail. By being conveniently available inside the Outlook interface, the user can easily avail of ForthWrite's AI drafting services while composing emails. The exact specifics of this integration aren't fully explained on their website, but it ensures a seamless, hassle-free usage within the existing email platform.

What does ForthWrite mean when it mentions version control and user optimization?

When ForthWrite refers to 'version control', it points to the ability to manage and keep various versions of prompts allowing for A/B tests and data-driven edits via the 'Prompt Lab'. 'User optimization', on the other hand, speaks to its evolving capability to increasingly mirror the user's unique writing style and preferences over time as the AI learns more about the user through their sent emails and accepted drafts.

Which AI models do ForthWrite use and why?

ForthWrite utilizes several major AI models, including OpenAI, Claude, Gemini, Grok, DeepSeek, Mistral, Perplexity, Cohere, and LibreChat. The benefit of employing a variety of AI models is that it broadens ForthWrite's understanding and interpretation of language and context, catering to various writing styles. This strategy ensures an adaptable and highly personalized writing assistance experience for each user.

How do context-aware replies work on ForthWrite?

Context-aware replies in ForthWrite are designed to provide comprehensive responses by carefully considering the entire email thread, including forwarded messages and nested introductions. It ensures that the drafted replies not only address the most recent queries but also other relevant topics raised in the entire thread, delivering a more thoughtful and thorough response.

What kind of integration does ForthWrite offer with web browsers?

ForthWrite offers browser-based functionality which means it integrates directly with the web browser and functions within it. This precludes the need for any additional software or plug-ins, and adds to the convenience and usability of ForthWrite. This feature, however, requires more specifics that are not entirely available in the given data.

Can I use ForthWrite with other email service providers apart from Gmail and Outlook?

ForthWrite's website specifically mentions seamless integration with Gmail and Outlook. While it's potentially possible for ForthWrite to be compatible with other email service providers, confirmation of this requires further specifics that are not available in the present dataset.

How does ForthWrite learn and emulate my writing style?

ForthWrite learns and emulates a user's writing style by examining their previous emails. The more the user drafts and sends out emails, the better ForthWrite understands their writing style. It captures the tone, sentence rhythm, and typical sign-offs of the user's sent emails, which helps it to write more precise and personalized replies. All this learning is encrypted and isolated to each user's account, forming a unique training set that increases accuracy with every sent email.

Can ForthWrite integrate with my current email platforms, such as Gmail or Outlook?

Yes, ForthWrite can integrate with your current email platforms. It's designed to seamlessly function within major email platforms like Gmail and Outlook. It operates straight from the email interface, offering a user-friendly and convenient experience.

What is the 'Voice Match' feature in ForthWrite?

The 'Voice Match' feature in ForthWrite is an advanced tool that captures the user's unique writing style, including their tone, sentence rhythm, and typical sign-offs from their sent emails. It studies and learns these attributes to mimic the user's writing style in the drafted emails, ensuring the responses sound authentic and personal.

How does the 'Prompt Lab' assist with version control and optimization in ForthWrite?

The 'Prompt Lab' in ForthWrite is a practical feature that allows users to manage their prompts. It lets them version control their prompts and test them against sent emails. What's more, the Prompt Lab also provides data-driven suggestions for edits, thereby helping to refine and optimize the generated email drafts.

What kind of insights can I get from ForthWrite's Performance Analytics?

ForthWrite's Performance Analytics provide valuable insights on the progress of the drafts in mirroring the user's voice. It monitors the acceptance rates, similarity scores, and the amount of time saved for the user. These insights help the user understand how closely the AI-generated drafts are matching their own writing style and voice, paving the way towards improved efficiency and personalization over time.

How does ForthWrite ensure data privacy?

ForthWrite ensures data privacy through the 'Bring Your Own Key' principle. This means users' sent emails are encrypted and stored in an individual account that is isolated and not shared. This way, ForthWrite ensures that users' data is neither shared nor trained on shared models, safeguarding user data privacy.

Can I export my data from ForthWrite?

Yes, users can export their data from ForthWrite at any time. This allows for maximum flexibility and control over the user's own data, further addressing privacy concerns.

Does ForthWrite support AI models aside from OpenAI? If yes, which ones?

Yes, ForthWrite is compatible with several major AI models beyond OpenAI. These include Claude, Gemini, Grok, DeepSeek, Mistral, Perplexity, Cohere, and LibreChat. This wide model compatibility amplifies the tool's flexibility and adaptability to various writing styles and tones.

Does ForthWrite provide A/B testing capability?

Yes, ForthWrite provides A/B testing capability. This functionality is included within the 'Prompt Lab' feature, which allows users to version control their prompts, test them against sent emails, and receive data-driven suggestions for edits. This helps in optimizing and improving the performance of their drafted emails.

What is ForthWrite's 'Bring Your Own Key' principle and how does it work?

ForthWrite's 'Bring Your Own Key' principle is a feature that gives users control over their data privacy. By owning their encryption key, users can ensure that their sent emails are stored and encrypted in their individual accounts and not shared or used with shared models. This protects the unique writing style and personal data of each user from either being mixed with others' data or being accessed by unauthorized parties.

What is the function of the 'Data Wiping Feature' in ForthWrite?

The 'Data Wiping Feature' in ForthWrite gives users the control to delete their data at any time with a single click. This feature is crucial for ensuring data privacy and control, empowering users to remove their training set whenever they feel the need.

Does ForthWrite work in my standard web browser?

Yes, ForthWrite works within standard web browsers. Its design allows it to function seamlessly on any browser interface, which makes it more accessible and convenient for users who prefer web-based emails over specific email platforms.

Does ForthWrite require setup or training to use?

ForthWrite does not require any setup or training to use. It's designed to be intuitive and user-friendly. Users can simply start to send out emails and the AI tool starts learning their writing style from the get-go, gradually improving its accuracy with every sent email.

How does ForthWrite help me save time?

ForthWrite helps users save time by automatically drafting replies. It creates drafts in the user's voice in the background as emails come in, significantly accelerating email interactions by minimizing the time a user would typically spend on composing an email.

How does ForthWrite capture my sentence rhythm and typical sign-offs?

ForthWrite captures a user's sentence rhythm and typical sign-offs by analyzing their sent emails. The AI models study these attributes and over time learn to mimic these aspects when auto-drafting replies, making the responses sound more custom and authentic.

Does ForthWrite create a unique training set for each user? How does this benefit me?

Yes, ForthWrite creates unique training sets for each user. It generates these sets based on the user's sent replies and accepted drafts. This benefits users as the more they use the tool, the more accurate and personalized their email drafts are, as the AI has a larger pool of user-specific data to learn from.

Can ForthWrite automatically craft email replies in my voice?

Yes, ForthWrite can automatically craft email replies in the user's voice. It studies and learns from the user's sent emails and acceptance rates of drafted emails to improve its writing style emulation. Over time, the tool can draft responses that sound authentically like the user, saving them writing time.

How does ForthWrite handle real sent mail analysis?

ForthWrite handles real sent mail analysis by storing the sent emails in an encrypted and isolated account. It analyses these emails to capture the user's unique tone, sentence rhythm, and sign-offs. This method enables the tool to learn from the user's real-life writing style and improve the authenticity of the auto-drafted emails.

How does the 'Automated Email Replies' feature of ForthWrite work?

ForthWrite's 'Automated Email Replies' feature streamlines email interactions by automatically drafting replies as emails arrive. It analyses the incoming email content and context and auto-drafts a reply in the user's voice, speeding up email handling significantly.

Will ForthWrite get more accurate with every email sent? How does it achieve this?

Yes, ForthWrite does grow more accurate with every email sent. It learns from the user's accepted drafts and actual sent emails, using these to train and enhance its understanding of the user's personal writing style. Over time, its ability to draft in the user's unique voice improves, leading to more accurate and personalized drafts.

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