Software Alternatives, Accelerators & Startups

yabai VS ForthWrite

Compare yabai VS ForthWrite and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

yabai logo yabai

A tiling window manager for macOS based on binary space partitioning

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.
Visit Website
  • yabai Landing page
    Landing page //
    2023-07-26
  • 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.

yabai

Website
github.com
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

yabai features and specs

  • Efficient Window Management
    Yabai provides advanced tiling window management for macOS, greatly increasing productivity by allowing users to manage windows through keyboard shortcuts and layouts, minimizing the need for mouse interactions.
  • Highly Customizable
    The software offers extensive configuration options, enabling users to personalize their window management experience according to their specific workflow and preferences.
  • Open Source
    Being open source, Yabai is free to use and modify, allowing the community to contribute to its development and enhancement. This fosters a collaborative environment for improving the software.
  • Supports Scripting
    Yabai supports scripting through AppleScript or shell commands, enabling users to automate complex workflows and integrate Yabai with other tools and applications seamlessly.
  • Lightweight
    Yabai is designed to be a lightweight window manager, which means it consumes minimal system resources, ensuring that your Mac continues to run smoothly even with numerous active windows.

Possible disadvantages of yabai

  • Steep Learning Curve
    For beginners, the configuration and use of Yabai can be daunting, requiring a significant amount of time and effort to fully understand and utilize its capabilities effectively.
  • Requires SIP Disablement
    To utilize some of Yabai's more advanced features, users need to partially disable System Integrity Protection (SIP), which can reduce the overall security of the macOS system.
  • Potential Compatibility Issues
    As macOS updates and changes, compatibility issues may arise, potentially breaking functionality. Users may need to wait for updates from the developer community to resolve these issues.
  • Limited Official Support
    As an open-source project, Yabai does not come with official support channels. Users must rely on community forums and documentation, which may not always provide immediate or comprehensive assistance.
  • Complex Configurations
    Setting up Yabai to fit specific needs can be complex and time-consuming, especially for users who are not familiar with scripting or advanced configuration files.

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 yabai

Overall verdict

  • Yabai is highly regarded among users who seek advanced customization and control over their macOS window management. However, it may have a steep learning curve for those unfamiliar with tiling window managers or command-line tools.

Why this product is good

  • Yabai is a popular tiling window manager for macOS, designed to streamline and enhance window management through robust keyboard shortcuts and automation features. It is particularly appreciated for its flexibility and efficiency in organizing a large number of open applications, contributing to a more productive workflow.

Recommended for

  • Developers who need efficient multitasking tools.
  • Users comfortable with the command line who enjoy customizing their environment.
  • Power users looking to optimize their macOS user experience.

yabai videos

Yabai Demonstration

More videos:

  • Demo - yabai macOS Tiling Window Manager Demonstration

ForthWrite videos

No ForthWrite videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to yabai and ForthWrite)
Window Manager
100 100%
0% 0
Writing Tools
0 0%
100% 100
Mac Tools
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing yabai 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

Share your experience with using yabai and ForthWrite. For example, how are they different and which one is better?
Log in or Post with

Reviews

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

yabai Reviews

We have no reviews of yabai yet.
Be the first one to post

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, yabai seems to be more popular. It has been mentiond 138 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.

yabai mentions (138)

  • Supercharge your macOS workspace management with Aerospace - A guide for busy people
    Aerospace does not rely on the native spaces feature. Instead, it has the concept of virtual workspaces, all of which live in a single native macOS space. Switching between these virtual workspaces essentially means hiding all other windows and only keeping the window(s) assigned to the active workspace. This is genius, as it makes Aerospace incredibly flexible in managing windows between workspaces, without the... - Source: dev.to / about 1 month ago
  • Jeff Geerling: The Framework 12 is dead. Apple killed it [video]
    Interesting. I used to daily drive for almost a year until a major macOS update broke it and I just didn't have it in me to diagnose the issue. I'll bookmark this for future adventures, thanks! - Source: Hacker News / about 1 month ago
  • Show HN: Liquid Radius โ€“ Unifies macOS Tahoe's inconsistent window corners
    > Liquid Radius doesn't touch /System or modify the SSV I'm not doubting you, but by requiring users to disable SIP you are effectively opening their entire system to SSV attacks. 99% of "regular" users won't understand that tradeoff. Rounded corners are not worth disabling the operating system's major security protections, especially in today's crazy cyber environment. Yabai [0] is a good example of how... - Source: Hacker News / about 2 months ago
  • From M1 MacBook to Arch Linux: A month-long experiment that became permanenent
    This. My 2013 MacBook Pro lasted just shy of 10 years no issues. My m3 max mbpro I only wish was the larger screen one and not the 13 inch one โ€ฆ oh well. But I suspect it will last me โ€” and be passed down as well โ€” 8-10 years as well. The trackpads are second to none. So are the speakers. The screen are pretty good. I wish mine got even brighter but the m4s do. The keyboard is finally awesome. The OS just works.... - Source: Hacker News / 11 months ago
  • I Used Arch, BTW: macOS, Day 1
    Aerospace is nice, but also consider checking out yabai [0] + sketchybar [1] for an i3/hyprland style tiling setup. More customizable (IMO) and perfectly suited for a terminal based workflow :~^) [0] https://github.com/koekeishiya/yabai. - Source: Hacker News / 12 months 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?

When comparing yabai and ForthWrite, you can also consider the following products

Rectangle - Window management app based on Spectacle, written in Swift.

Superhuman - Superhuman is an email management tool.

Moom - Move your mouse over the green zoom button in any window, and Moom's mouse control overlay will appear (as seen in the above animation).

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.

BTT Remote - A remote control for you Mac, using your iPhone or iPad

Lavender - Realtime coaching for sales emails.