Software Alternatives, Accelerators & Startups

ct.js VS ForthWrite

Compare ct.js VS ForthWrite and see what are their differences

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ct.js logo ct.js

ct.js is a 2D game editor (desktop app) based on web technologies.

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
  • ct.js Landing page
    Landing page //
    2022-10-11
  • 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.

ct.js

Website
ctjs.rocks
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

ct.js features and specs

  • User-Friendly Interface
    Ct.js offers an intuitive and easy-to-use interface that is accessible for beginners. It enables users to create their games without extensive coding knowledge, thanks to a visual editor and an organized layout.
  • Cross-Platform Support
    Games made with ct.js can be exported to multiple platforms, including HTML5, Windows, MacOS, and Linux. This makes it versatile for developers aiming to reach a broad audience.
  • Modular System
    Ct.js uses a modular system that allows users to add various predefined modules to their projects. This fosters a customizable development environment, supporting a range of functionalities without the need for external plugins.
  • Active Community and Support
    Ct.js has an active community and provides ample support through forums, documentation, and tutorials. This helps new users quickly get up to speed and resolve issues efficiently.
  • Open Source
    Being an open-source tool, developers can inspect, modify, and contribute to the ct.js source code. This transparency fosters innovation and continuous improvement in the toolโ€™s capabilities.

Possible disadvantages of ct.js

  • Limited Advanced Features
    While ct.js is great for beginners and small to medium-sized games, it may lack some advanced features and tools found in more established engines like Unity or Unreal. This can be limiting for more complex projects.
  • Performance Constraints
    As a JavaScript-based engine, ct.js can experience performance issues, particularly with larger and more resource-intensive projects. It may not be as optimized for performance as some other engines.
  • Steeper Learning Curve For Complex Features
    Although the basics are easy to grasp, some more complex features may still have a steeper learning curve and require a deeper understanding of JavaScript and game development principles.
  • Smaller Ecosystem
    The ecosystem around ct.js is smaller compared to major game engines. There are fewer third-party plugins, assets, and community contributions available, which can limit resources for developers.
  • Limited Professional Use
    Ct.js might not be widely recognized or adopted in professional game development environments. For developers aiming for a career in larger studios or high-budget projects, proficiency in more mainstream engines might be preferred.

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 ct.js

Overall verdict

  • Overall, ct.js is a highly regarded game development platform due to its balance of ease-of-use and powerful features. It is continually updated and improved, reflecting the developers' commitment to maintaining a robust tool for game creation. As a result, it is considered a good choice for those interested in game development.

Why this product is good

  • ct.js (ctjs.rocks) is a game development tool designed to be user-friendly and accessible for beginners while still offering extensive features for more advanced users. Its visual editor allows users to create games with little to no programming knowledge, and it supports JavaScript for those who want to dive deeper into coding. The platform offers a range of modules and plugins to extend functionality, making it a versatile tool for creating 2D games. The community is supportive, and the documentation is comprehensive, aiding both new and experienced developers.

Recommended for

    ct.js is recommended for beginners who are looking to make their first games and are interested in learning the basics of game design and development. It is also suitable for hobbyists and indie developers who want to rapidly prototype and create 2D games without investing in more complex and costly software. Additionally, educators and students can benefit from using ct.js as a learning tool in educational settings.

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

ct.js videos

Ct.js -- An Awesome 2D Game Engine/Editor (That's Open Source & Cross Platform!)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to ct.js and ForthWrite)
Game Development
100 100%
0% 0
Email
0 0%
100% 100
Game Engine
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing ct.js 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 ct.js 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 ct.js and ForthWrite

ct.js Reviews

16 Scratch Alternatives
Anyone who wants to learn the programming languages to make some 2D-based games in a much more entertaining environment can check out one of the leading platforms known as Ct.js. This platform lets its users get the enhanced visual editor and the massive library enclosed with the coding documents for ease. It can even permit its clients to have the modern development...
20 Best Scratch Alternatives 2023
A significant difference between Ct.js and Scratch is that with Ct.js, you work with codes. Nevertheless, the code editor is intuitive with editable examples and demo codes.

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, ct.js seems to be more popular. It has been mentiond 3 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.

ct.js mentions (3)

  • Web Game โ€“ Squirrel shoots nuts
    Mainly ct.js an awesome 2D game editor (https://ctjs.rocks/). Source: over 4 years ago
  • My Windows 11 NordTheme Setup
    The taskbar icons are from niivu's Nord dock icons (they come in .png and .ico formats so you can set your taskbar icon's to those .ico files!), Some taskbar icons, like the ct.js and dragonbones icons are my own edits of the original icon files extracted from the executables! Source: over 4 years ago
  • Blog about gamedev and ct.js, a javascript modern 2D game engine.
    Since 2019, I have a lot of fun with ct.js, so I want to share. : ). Source: about 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 ct.js and ForthWrite, you can also consider the following products

Godot Engine - Feature-packed 2D and 3D open source game engine.

Superhuman - Superhuman is an email management tool.

BYOND - BYOND is the premier community for making and playing online multiplayer games.

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.

RPG Maker - Make your own PC game with RPG Maker. Our easy to use tools are simple enough for a child, and powerful enough for a developer. Try it free today!

Lavender - Realtime coaching for sales emails.