Software Alternatives, Accelerators & Startups

Fluid VS ForthWrite

Compare Fluid 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.

Fluid logo Fluid

Turn Your Favorite Web Apps into Real Mac Apps.

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
  • Fluid Landing page
    Landing page //
    2021-07-29
  • 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.

Fluid

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

Fluid features and specs

  • Dedicated Browsers
    Fluid creates site-specific browsers that allow users to have dedicated apps for their favorite web pages. This can enhance focus and organization by keeping tasks separate from regular web browsing.
  • Custom User Experience
    Each Site Specific Browser (SSB) can have a custom icon and name, providing a more personalized and aesthetically pleasing user interface.
  • Resource Management
    Having dedicated apps for regularly used web services can minimize the use of browser tabs and extensions, potentially leading to better performance and resource management.
  • Independence from Web Browser
    Fluid apps are independent of the main web browser. This means that if your browser crashes or has issues, your Fluid apps remain unaffected.
  • Enhanced Productivity
    By converting web apps into standalone desktop applications, users can more easily compartmentalize their work, leading to enhanced productivity.

Possible disadvantages of Fluid

  • Limited to MacOS
    Fluid is available only for MacOS, which limits its usability to Mac users and excludes users on other operating systems like Windows or Linux.
  • Manual Updates
    Users need to manually update each Site Specific Browser (SSB) created through Fluid, as these do not automatically update like regular browser tabs.
  • Security Risks
    As Fluid apps are essentially wrappers for web pages, they are subject to the same security risks as any web browser. Users need to ensure they are visiting trusted sites.
  • Limited Functionality
    Unlike full-fledged desktop applications, Fluid apps might have limited native functionality. They rely heavily on the web app's own features and may lack advanced desktop integrations.
  • Cost for Full Features
    While Fluid is free to use, certain advanced features, such as pinning apps to the status bar, require a one-time purchase of Fluid's paid version.

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 Fluid

Overall verdict

  • Fluid is a good option for macOS users who find themselves frequently switching between web applications and want a more streamlined process. It's especially useful for those who prefer to keep web app sessions isolated or those who enjoy customizing their workflows. However, consider that it is only available for macOS and may not support all features of more complex web applications.

Why this product is good

  • Fluid (fluidapp.com) allows users to create site-specific browsers, which can be useful for treating web applications as standalone apps on macOS. This can help with productivity by preventing web distractions and organizing workflows. Fluid is particularly beneficial if you frequently use web apps and want them to function like native applications with their own dock icons and separate sessions.

Recommended for

  • MacOS users looking to create desktop-like experiences for web applications.
  • Individuals seeking to minimize distractions from other open tabs in a standard browser.
  • Users who need isolated sessions for different web applications.
  • People who appreciate customizing their desktop workflow.

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

Fluid videos

Primochill Vue Fluid Review

More videos:

  • Review - FluidReview - Accept Online Applications and Submissions and Review
  • Review - Golden Matte Fluid Acrylic Review โ€ข An Alternative to Gouache?

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Fluid and ForthWrite)
Development Tools
100 100%
0% 0
Email
0 0%
100% 100
Group Chat & Notifications
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Fluid 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 Fluid and ForthWrite. For example, how are they different and which one is better?
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Reviews

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

Fluid Reviews

10+ Best Prototyping Tools for UI/UX Designers in 2018
With a strong focus on simplicity and communication, Fluid UI great Prototyping tools. Having built-in high and low fidelity component libraries, live team collaboration, device previews and video presentations making it a top-notch solution for designers, product managers and founders alike.

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, Fluid seems to be more popular. It has been mentiond 19 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.

Fluid mentions (19)

  • ToDesktop โ€“ Web app to desktop app in minutes
    > Is ToDesktop For Me? > If you want to make a desktop app of a website for your personal use, ToDesktop is overkill. I just want to point out that a lot of us "pros" learn how to use tools like this by semi-personal use. Therefore, you might want to consider a free personal version that's crippled in a mildly annoying way: For example, no installer, don't sign the app, and have an easily-ignorable nag. (Therefore... - Source: Hacker News / almost 3 years ago
  • in safari Sonoma, do profiles act like containers ? (firefox container)
    If you haven't used Fluid - https://fluidapp.com , I would recommend trying the free download. Source: about 3 years ago
  • Why is it so hard to change Chromium's UI?
    You can use Min, Fluid or any browser with full screen mode to have the same effect. Source: over 3 years ago
  • Safari Window Management
    Https://fluidapp.com/ might do it for you. Other applications like this also exist. Source: over 3 years ago
  • Web Push for Web Apps on iOS and iPadOS
    Does Fluid[1] work as a solution for you? Iโ€™m on an older OS with an older version but I love it for creating single-site apps. [1] https://fluidapp.com/. - Source: Hacker News / over 3 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?

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

WebCatalog - Run your favorite web apps natively

ReclaimAI - Helps users prioritize their work and personal calendars

Nativeifier - Turn any webpage into a native app

Superhuman - Superhuman is an email management tool.

Coherence X - Coherence X4 is a powerful tool that allows you to turn any website into a chromium-based, isolated, native application on your Mac.

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