Software Alternatives, Accelerators & Startups

PySimpleGUI VS ForthWrite

Compare PySimpleGUI VS ForthWrite and see what are their differences

This page does not exist

PySimpleGUI logo PySimpleGUI

A simple to use GUI that can create custom GUIs

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
  • PySimpleGUI Landing page
    Landing page //
    2023-08-18
  • 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.

PySimpleGUI

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

PySimpleGUI features and specs

  • Ease of Use
    PySimpleGUI is designed to be easy to use for beginners, with a simpler API compared to other GUI frameworks like Tkinter or PyQt. This reduces the learning curve for new users.
  • Cross-Platform Compatibility
    The library runs on multiple platforms including Windows, macOS, and Linux, allowing developers to write code that works across different environments.
  • Simplified Codebase
    PySimpleGUI abstracts the complexity of GUI programming, allowing developers to create graphical interfaces with less code, which can improve readability and reduce development time.
  • Integration with Other Frameworks
    PySimpleGUI can work on top of tkinter, Qt, WxPython, and Remi, thus giving users the flexibility to switch between underlying frameworks with minimal code changes.
  • Community Support
    The project is open source with active community support and frequent updates, which helps in getting assistance and improvements consistently.

Possible disadvantages of PySimpleGUI

  • Limited Advanced Features
    While PySimpleGUI is excellent for simple applications, it may lack advanced features required for complex GUI applications compared to more comprehensive frameworks like PyQt.
  • Performance
    PySimpleGUI might not be as optimized for performance as lower-level GUI frameworks, which can be a drawback for applications with intensive graphical requirements.
  • Dependency on Underlying Libraries
    PySimpleGUI's functionality is dependent on the underlying GUI frameworks it wraps, such as Tkinter or Qt, which may limit its capability to innovate beyond what those frameworks offer.
  • Lack of Native Look and Feel
    The GUI created with PySimpleGUI might not always match the native look and feel of the underlying operating system, which can affect user experience.
  • Smaller Ecosystem
    Compared to more established GUI frameworks like PyQt or Tkinter, PySimpleGUI has a smaller ecosystem, which might limit the availability of third-party extensions or plugins.

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

PySimpleGUI videos

Real Python Podcast โ€“ Episode 17 โ€“ Linear Programming, PySimpleGUI, and More

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to PySimpleGUI and ForthWrite)
Development
100 100%
0% 0
Email
0 0%
100% 100
Developer Tools
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing PySimpleGUI 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 PySimpleGUI 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 PySimpleGUI and ForthWrite

PySimpleGUI Reviews

25 Python Frameworks to Master
Itโ€™s a great option for creating simple and easy-to-use graphical user interfaces in Python and allows you to add a GUI to your already working scripts pretty easily. PySimpleGUI wraps the power of 4 different GUI libraries, PySide, Tkinter, wxPython, and Remi.
Source: kinsta.com
Which Python GUI library should you use? Comparing the Python GUI libraries available in 2023
PySimpleGUI aims to simplify GUI application development for Python. It doesn't reinvent the wheel but provides a wrapper around other existing frameworks such as Tkinter, Qt (PySide 2), WxPython and Remi. By doing so, it not only lowers the barrier to creating a GUI but also allows you to easily migrate from one GUI framework to another by simply changing the import...
10 Best Python Libraries for GUI
PySimpleGUI was developed back in 2018 to make it easier for Python beginners to get started with GUI development. A lot of the other frameworks require more complicated work, but PySimpleGUI enables you to begin right away without worrying about the advanced intricacies of other libraries.
Source: www.unite.ai
Top 10 Python GUI Frameworks for Developers
Isnโ€™t the name of this framework a dead giveaway of what it is meant to do? Getting back to the topic, those starting fresh with Python application development may find a lot of Python GUI frameworks daunting at first. Mike B. created PySimpleGUI in 2018 to make it easier for Python newbies to get into GUI development without spending too much time getting into the...

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)

What are some alternatives?

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

PyQt - Riverbank | Software | PyQt | What is PyQt?

ReclaimAI - Helps users prioritize their work and personal calendars

Tkinter - Tkinter is a Python wrapper for Tcl/Tk that offers classes to create various graphical user interfaces.

Superhuman - Superhuman is an email management tool.

MD Python Designer - A drag and drop GUI Designer that uses a combination of Tkinter and its own code.

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