Software Alternatives, Accelerators & Startups

Unibox VS ForthWrite

Compare Unibox VS ForthWrite and see what are their differences

Unibox logo Unibox

Unibox is an application that aims to completely overhaul your email experience. Unibox resorts your email so that you can group the messages you receive by their sender. Read more about Unibox.

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.
  • Unibox Landing page
    Landing page //
    2021-09-26
  • 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.

Unibox

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12 / 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

Unibox features and specs

  • Unified Inbox
    Unibox consolidates all your emails into a single, organized inbox, making it easier to manage your messages without switching between multiple accounts.
  • Contact-Centric Interface
    The app organizes emails by contact rather than threads, allowing users to easily follow and manage conversations with specific people.
  • Clean and Intuitive Design
    Unibox provides a minimalistic and user-friendly interface, which enhances the user experience by reducing clutter and focusing on what's important.
  • Attachment Management
    The application makes it easy to handle attachments, displaying them as a gallery in the contact view, which simplifies the process of locating and handling files.

Possible disadvantages of Unibox

  • Limited Features
    Compared to other email clients, Unibox might lack some advanced features and customization options that power users expect.
  • Mac and iOS Only
    Unibox is only available for macOS and iOS, which excludes users on other operating systems such as Windows or Android.
  • Potential Learning Curve
    Users accustomed to traditional email clients may experience a learning curve due to Unibox's unique contact-centric approach.
  • Cost
    Unibox requires a purchase, which may not be ideal for users who are looking for a free solution.

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 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

Unibox videos

The Unibox - Monthly Subscription Box Unboxing & Review

More videos:

  • Review - Unibox Review - Unboxing Of A Gift Box For University Students

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Unibox and ForthWrite)
Email
84 84%
16% 16
Email Clients
100 100%
0% 0
Email Productivity
0 0%
100% 100
Calendar
100 100%
0% 0

Questions & Answers

As answered by people managing Unibox 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 Unibox 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 Unibox and ForthWrite

Unibox Reviews

10 Alternatives to Thunderbird Reddit โ€“ Ease Your Email Life!
We have included Unibox as one of the Top 10 alternatives among all the apps on our list. It lends pleasure to using mail because the focus is on the one who is using it instead of the email.
Source: droidpile.com
11 Best Thunderbird Alternatives That Make Email Easier
Unibox is one of the distinctive apps among all others we have in our list of Top 10 alternatives. Gives pleasure in mailing as it focuses more on the one who is using it rather than the emails.
10 Alternatives to Mozilla Thunderbird
Unibox doesnโ€™t present you with a long list of emails. Instead, you see the people who sent them. Clicking on someoneโ€™s avatar brings up your current conversation with them. The whole experience is formatted like a chat app rather than separate messages. Clicking on the bottom of the screen will show all emails you received from a particular person.

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, Unibox seems to be more popular. It has been mentiond 1 time 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.

Unibox mentions (1)

  • Need Suggestion for MacOSX Email Client That Show Emails in The Conversation Thread Mode
    UniBox This is good app, unfortunately, after looking their twitter account, looks like they have stopped the development in 2017. Source: almost 5 years ago

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 Unibox and ForthWrite, you can also consider the following products

Postbox - The Power Email App for busy professionals, like you.

ReclaimAI - Helps users prioritize their work and personal calendars

Kiwi for Gmail - Kiwi for Gmail is a desktop application for Mac and Windows devices that takes the Google Workspace tools you use every day , like Gmail, Drive, Calendar, Docs, Sheets and Slides and transforms them into a desktop office suite.

Superhuman - Superhuman is an email management tool.

Airmail - Airmail is a lightweight and lightning fast mail client for Mac.

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