Software Alternatives, Accelerators & Startups

Lumosity VS ForthWrite

Compare Lumosity VS ForthWrite and see what are their differences

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Lumosity logo Lumosity

Discover what your mind can do. Improve memory, increase focus, and find calm - with the #1 brain training app. Get started now.

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
  • Lumosity Landing page
    Landing page //
    2021-12-29
  • 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.

Lumosity

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

Lumosity features and specs

  • Variety of Games
    Lumosity offers a wide range of brain games that target different cognitive skills such as memory, attention, and problem-solving.
  • Personalized Training Programs
    Based on initial assessments, Lumosity designs a personalized training program to cater to individual cognitive goals and track progress over time.
  • User-Friendly Interface
    The website and app have a clean, intuitive design that makes navigation and usage straightforward and enjoyable.
  • Scientific Background
    Lumosity collaborates with over 100 researchers worldwide and covers a broad range of cognitive research through their games and exercises.
  • Progress Tracking
    Users receive detailed feedback and can track their improvement in various cognitive domains over time, which can be motivating and insightful.

Possible disadvantages of Lumosity

  • Limited Free Features
    The free version of Lumosity offers limited access to games and features, pushing users towards purchasing a premium subscription for full access.
  • Subscription Cost
    The premium subscription can be relatively expensive, which may be a barrier for some users.
  • Debated Efficacy
    Some experts argue that the scientific evidence supporting the effectiveness of brain training programs for long-term cognitive improvement is not conclusive.
  • Repetitiveness
    Some users may find the games become repetitive over time, which can reduce engagement and perceived effectiveness.
  • Privacy Concerns
    As with any digital platform, there are concerns about data privacy and how personal information and usage data might be used or shared.

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 Lumosity

Overall verdict

  • Lumosity can be a useful tool for those looking to engage in brain exercises and enjoy gamified cognitive challenges. However, while studies show some benefits to cognitive training, it is essential to have realistic expectations and understand that it may not lead to significant or general improvements in cognitive functions in everyday life. It's a good supplemental activity but not a substitute for professional cognitive training or medical treatment.

Why this product is good

  • Lumosity is a popular online platform that offers a variety of cognitive games and exercises designed to improve memory, attention, flexibility, speed of processing, and problem-solving skills. It is developed by neuroscientists and its exercises are based on the principles of cognitive training. The platform is user-friendly and provides personalized training regimens, tracking, and performance feedback, which can motivate users to engage regularly.

Recommended for

    Lumosity is recommended for individuals who are interested in casual brain training exercises and want to engage in activities that challenge their cognitive skills. It is suitable for users of different age groups but is particularly popular among adults looking to maintain or slightly enhance their cognitive capabilities. It should not be used as a sole method for addressing cognitive impairments or serious cognitive challenges.

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

Lumosity videos

Lumosity Sucks (And Is Not Worth Your Money)

More videos:

  • Review - Can THIS Make You Smarter?! (Lumosity Review)
  • Review - Do Brain Training Games Like Lumosity Really Work?

ForthWrite videos

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

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Category Popularity

0-100% (relative to Lumosity and ForthWrite)
CMS
100 100%
0% 0
Email
0 0%
100% 100
Social Media Tools
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Lumosity 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

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Reviews

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

Lumosity Reviews

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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 Lumosity and ForthWrite, you can also consider the following products

Elevate - Elevate is an award-winning brain training tool designed to build communication and analytical skills.

ReclaimAI - Helps users prioritize their work and personal calendars

Peak - Peak is the automated way to keep track of what everyone is working on.

Superhuman - Superhuman is an email management tool.

Brain Workshop - Brain Workshop is a open-source version of the dual n-back brain training exercise.

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