Software Alternatives, Accelerators & Startups

Gutenberg Books VS ForthWrite

Compare Gutenberg Books VS ForthWrite and see what are their differences

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Gutenberg Books logo Gutenberg Books

Gutenberg Books is free to use Android, and iOS app with more than 50,000 titles from classic to top hits and features all the important books ever published in history.

ForthWrite logo ForthWrite

Email that sounds like you, and gets measurably more like you every week. Drafts in Gmail, Outlook, and the browser. Free to start.
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  • Gutenberg Books Landing page
    Landing page //
    2021-08-15
  • ForthWrite Landing Page
    Landing Page //
    2026-06-19
  • ForthWrite Dashboard
    Dashboard //
    2026-06-19
  • ForthWrite In Gmail
    In Gmail //
    2026-06-19
  • ForthWrite Pricing
    Pricing //
    2026-06-19

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

  • 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

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.

Gutenberg Books

Pricing URL
-
$ Details
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12.0 / Monthly (Standard plan)
Platforms
Web
Release Date
2026 June
Startup details
Country
United States
State
California
City
San Diego
Founder(s)
Curtis Boortz
Employees
1 - 9

Gutenberg Books features and specs

  • Free Access
    All the books on Gutenberg Books are available for free, making literature accessible to everyone regardless of financial status.
  • Public Domain Works
    The site offers a vast library of public domain works, which means no copyright restrictions and more freedom to use the content.
  • Extensive Collection
    The platform hosts over 60,000 books, including classics, historical documents, and other important literary works.
  • Multiple Formats
    Books are available in a variety of formats (ePub, Kindle, HTML, plain text), providing flexibility in how and where users read the content.
  • Easy Access
    Books can be instantly downloaded or read online without the need for any membership or account creation.
  • Search and Navigation
    The website provides robust search and navigation tools, making it easier for users to find specific books or authors.

Possible disadvantages of Gutenberg Books

  • Limited to Public Domain
    The collection is limited to books that are in the public domain, which means newer books and many modern works are not available.
  • Quality Variability
    Because many of the books are digitized by volunteers, the quality of some texts can be inconsistent, including potential formatting errors.
  • Outdated User Interface
    The website design and user experience are considered outdated by modern standards, which can make navigation less intuitive.
  • Text-Only Focus
    The site primarily offers text versions of books, which means it lacks the supplemental materials (illustrations, annotations) found in modern editions.
  • Limited Modern Accessibility Features
    The platform lacks some of the modern accessibility features like text-to-speech integration and easy font adjustments that come standard with other e-reading platforms.

ForthWrite features and specs

  • Voice Matching
    Learns from your real sent mail, not templates
  • Auto-draft replies
    Replies waiting in Gmail before you open your inbox
  • Batch-drafting
    Draft replies for your entire inbox with one click
  • Works in browser
    Gmail, Outlook, and web browsers
  • BYOK support
    Claude, OpenAI, Grok, Mistral, and more
  • Prompt Lab
    Version control and A/B test your persona prompt
  • Free tier
    10 drafts per week, no credit card required

Analysis of Gutenberg Books

Overall verdict

  • Yes, Gutenberg Books is a good and reputable source for free literary and educational content. It is particularly beneficial for those interested in exploring classic literature without cost barriers.

Why this product is good

  • Project Gutenberg is considered a valuable resource because it offers over 60,000 free eBooks, including classic literature, important historical texts, and works from a variety of genres, making literature accessible to everyone. It is a volunteer-driven initiative and promotes digital preservation of printed texts.

Recommended for

  • Students and educators seeking accessible resources for literary studies
  • Readers interested in classic literature and historical texts
  • Individuals who prefer digital reading on various devices
  • Researchers exploring public domain works
  • Anyone looking for free and legally obtained books

Analysis of ForthWrite

Overall verdict

  • I don't have verified information about a product called ForthWrite (forthwrite.ai). I cannot confirm its features, quality, or reputation, so I'm unable to provide an accurate assessment of whether it's good.

Why this product is good

  • No reliable data available on this specific product in my knowledge base
  • This may be a newer product, a niche tool, or possibly a fictional/hypothetical name
  • Providing details without verified information could result in inaccurate or fabricated claims

Recommended for

  • Unable to determine without verified product information
  • Consider checking the official website, user reviews on platforms like G2 or Trustpilot, and independent tech review sites for accurate details

Category Popularity

0-100% (relative to Gutenberg Books and ForthWrite)
Books & Reference
100 100%
0% 0
Email
0 0%
100% 100
Ebooks
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Gutenberg Books and ForthWrite.

Which are the primary technologies used for building your product?

ForthWrite's answer:

Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API

What makes your product unique?

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.

Why should a person choose your product over its competitors?

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.

How would you describe the primary audience of your product?

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.

What's the story behind your product?

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.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Gutenberg Books and ForthWrite

Gutenberg Books Reviews

We have no reviews of Gutenberg Books yet.
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ForthWrite Reviews

  1. curtisboortz
    ยท Founder at ForthWrite ยท
    I built ForthWrite to fix generic AI email, and I still use it every day

    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.

    ๐Ÿ Competitors: Jace.ai, Fyxer, Mailmeteor
    ๐Ÿ‘ Pros:    Drafts land inside gmail and outlook; no copy-pasting from a chat window|Voice matching is on the free tier, not paywalled behind paid plans|No api key, no credit card to start; free tier runs on a server-side proxy|Learns from every edit you make before sending; drafts improve over time|Full keyboard flow: alt+shift+d to draft in any thread, no mouse required|Byok on paid plans, 9 providers supported, keys encrypted at rest|Web compose at forthwrite.ai works without installing the extension at all
    ๐Ÿ‘Ž Cons:    10 free drafts/week is enough to evaluate, not enough for a heavy inbox|Auto-draft, batch replies, and prompt lab all require the pro tier|Early-stage product; fewer third-party integrations than mature inbox tools|No mobile app: the extension and add-in are desktop-only (chrome on web, or the outlook desktop add-in)

Social recommendations and mentions

Based on our record, Gutenberg Books seems to be more popular. It has been mentiond 133 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.

Gutenberg Books mentions (133)

  • Project Gutenberg โ€“ keeps getting better
    From Italy, https://www.gutenberg.org/ gives a 404 error and https://gutenberg.org/ opens a very official-looking page stating "police notice. This site is under judicial seizure" and references a sentence number: "criminal proceedings 52127/20 R.N.R.I. Tribunal of Rome" Any idea what's happening? - Source: Hacker News / 2 months ago
  • The Feynman Lectures on Physics
    I got a kindle Scribe which can load PDF, HTML and text files via iPhone Kindle App and read offline. Since most pre-1925 books are out of copyright and free on https://gutenberg.org, ACM is open access (https://dl.acm.org/) and we have open https://arxiv.org/, it is the golden age for readers seeking original content. We donโ€™t need bots to read for us. We can live in the mind of human writers. - Source: Hacker News / 5 months ago
  • Ask HN: Where to put a static page that would last forever
    If you are willing to relinquish copyright claims on your work, for example by including a copyleft statement in the bookโ€™s preface, an organization like Project Gutenberg may be willing to host it, ostensibly in perpetuity. Other considerations are whether the book can stand alone as text-only, or will it rely on additional media to convey its message to the reader? More about Project Gutenberg:... - Source: Hacker News / over 1 year ago
  • [Advice] How to quit social media and not be bored?
    You can also read free books at archive.org and gutenberg.org. Source: over 2 years ago
  • Device Agnostic Books?
    If you like classics you can get public domain books from gutenberg.org. Source: over 2 years ago
View more

ForthWrite mentions (0)

We have not tracked any mentions of ForthWrite yet. Tracking of ForthWrite recommendations started around Jun 2026.

What are some alternatives?

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Archive.org - Internet Archive is a non-profit digital library offering free universal access to books, movies...

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Z-Lib - ZLibraryPart of Z-Library project. The world's largest ebook library.

Superhuman - Superhuman is an email management tool.

Standard Ebooks - Online library of downloadable e-books that focuses on quality and modern standards in typography.

Shortwave - Email smarter & faster with a reinvented experience for your Gmail