Software Alternatives, Accelerators & Startups

Nucleo VS ForthWrite

Compare Nucleo VS ForthWrite and see what are their differences

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Nucleo logo Nucleo

Commercial vector icons and accompanying apps to manage and customize them.

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
  • Nucleo Landing page
    Landing page //
    2023-05-06
  • 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.

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

Nucleo features and specs

  • Extensive Icon Library
    Nucleo offers a vast collection of customizable icons, providing users with numerous options for various design needs.
  • Customization
    Users can easily customize the icons by changing colors, sizes, and other properties to match their design requirements.
  • User-friendly Interface
    The app provides an intuitive and easy-to-navigate interface, making it simple for users to find and use icons quickly.
  • Organizational Tools
    Nucleo includes organizational features like tagging and categorization, which help users manage their icon collections efficiently.
  • Offline Access
    Nucleo allows users to access and manage their icon library without requiring an internet connection.
  • Compatibility
    Nucleo supports multiple design tools and platforms, making it versatile and adaptable for various workflows.
  • One-time Purchase
    Nucleo is available for a one-time purchase, avoiding recurring subscription costs for users.

Possible disadvantages of Nucleo

  • Cost
    The one-time purchase cost can be a barrier for some users, especially those who might not need an extensive icon library.
  • Learning Curve
    While the interface is intuitive, new users may need some time to understand all the features and customization options available.
  • Limited Free Version
    The free version offers limited access to icons and features, which may not be sufficient for all users' needs.
  • No Cloud Sync
    Nucleo currently does not offer cloud synchronization, limiting the ability to easily share and sync libraries across multiple devices.
  • Restricted to Icons
    Nucleo focuses solely on icons, so users needing other design assets may need additional tools or resources.
  • Platform Availability
    Nucleo is primarily available for macOS and Windows, which might not be ideal for users on other operating systems.

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 Nucleo

Overall verdict

  • Yes, Nucleo is considered a good tool for designers who need a comprehensive and organized icon library. Its user-friendly interface and robust features can significantly enhance design workflows.

Why this product is good

  • Nucleo is a popular icon design and management tool widely appreciated for its vast library of high-quality icons, ease of use, and seamless integration with design software like Sketch, Adobe XD, and Figma. Users often highlight the customization options and the ability to organize and export icons in various formats, making it a versatile resource for designers.

Recommended for

    Nucleo is recommended for UI/UX designers, web and app developers, and graphic designers who require a dependable and flexible icon management solution to streamline their design processes.

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

Nucleo videos

STM32 Nucleo-64 Development Board Review and Getting Started

More videos:

  • Review - STM32 Nucleo Boards
  • Review - Product overview of Nucleo-32 board for STM32

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Nucleo and ForthWrite)
Web Icons
100 100%
0% 0
Email
0 0%
100% 100
Vector Icons
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Nucleo 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 Nucleo 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 Nucleo and ForthWrite

Nucleo Reviews

12 Best Free FontAwesome Alternatives in 2023ย 
And how can we miss out on Nucleo when talking about the best font awesome alternatives? Nucleo is an absolutely beautiful library that consists of 32995 icons. It has six grid styles including 12, 16, 24, 32, 48, and 64 pixels and the three styles of icons include outline, fill, and color. Here, you can find 3304 unique symbols organized in 40 categories.
Source: lineicons.com
10 Best Fontello Alternatives 2021
Nucleo icons can be dragged and dropped into your design or developer tools of choice, thereby speeding up your workflow and boosting productivity. You can import your favorite icons into the Nucleo app and organize them into collections.

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, Nucleo 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.

Nucleo mentions (3)

  • What icon library do you use for front-end UIs?
    I use Nucleo to manage my own icon sets. From Google to fontawesome to my own custom made vectors. Then you create "projects" and put whatever icons you want in it, then export the iconfont set. Source: over 4 years ago
  • I made a free dashboard template using Tailwind CSS and React
    They come from Nucleo App (https://nucleoapp.com/). Source: about 5 years ago
  • Custom icons in the WordPress block editor
    I'm a big fan of Nucleo icons, some of which I already use in my WordPress theme Garrick, but I've thought for a while now that it would be nice to have access to more icons as inline elements -- not just outside the editor or as block-level elements. This plugin fills that gap nicely, but it comes with Font Awesome 4 out of the box. Fortunately, it also provides some filters that allow for overriding this default... - Source: dev.to / over 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 Nucleo and ForthWrite, you can also consider the following products

Font Awesome - Font Awesome makes it easy to add vector icons and social logos to your website. And version 5 is redesigned and built from the ground up!

ReclaimAI - Helps users prioritize their work and personal calendars

Iconbuddy - 200K+ open source SVG icons, fully customizable!

Superhuman - Superhuman is an email management tool.

Streamline - Streamline is a web-based vacation rental software that manages vacation rental properties with flipkey integration, online booking, lead management, credit card processing, etc.

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