Software Alternatives, Accelerators & Startups

Usage4Claude VS ForthWrite

Compare Usage4Claude VS ForthWrite and see what are their differences

Usage4Claude logo Usage4Claude

Monitor Your Claude AI Usage Right from Your Mac Menu Bar

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.
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  • 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.

Usage4Claude

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

Usage4Claude features and specs

  • Real-time token tracking
    Usage4Claude provides real-time monitoring of token usage directly within the Claude interface, allowing users to keep track of their consumption without needing to check external dashboards or billing pages.
  • Lightweight browser extension
    It operates as a simple browser extension (userscript) that is easy to install and doesn't require complex setup or additional software, making it accessible to a wide range of users.
  • Cost awareness
    By displaying token usage information, it helps users become more aware of their API or subscription consumption, enabling better budget management and preventing unexpected overages.
  • Open source
    The project is open source and hosted on GitHub, meaning users can inspect the code for security, contribute improvements, and customize it to their specific needs.
  • Non-intrusive integration
    The tool integrates directly into the Claude web interface without significantly altering the user experience, providing useful data in a convenient overlay or display without disrupting normal workflow.

Possible disadvantages of Usage4Claude

  • Dependency on UI structure
    As a userscript that relies on the Claude web interface's DOM structure, it can break whenever Anthropic updates or redesigns the Claude UI, requiring frequent maintenance and updates.
  • Limited official support
    Being a third-party community project, it has no official backing from Anthropic, meaning there are no guarantees of long-term maintenance, compatibility, or accuracy of the usage data displayed.
  • Potential accuracy concerns
    Token counting done client-side or through estimation may not perfectly match Anthropic's actual billing calculations, potentially giving users a false sense of their true usage levels.
  • Small community and documentation
    As a relatively niche project, it may have limited documentation, fewer contributors, and a smaller user base, which can make troubleshooting issues more difficult.
  • Security considerations
    Installing third-party userscripts that interact with web applications like Claude requires trusting the developer, as the script has access to page content and potentially sensitive conversation data.

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 Usage4Claude

Overall verdict

  • Usage4Claude is a helpful open-source utility for tracking Claude API usage and costs, offering good value for developers who want visibility into their consumption without paying for a commercial monitoring tool.

Why this product is good

  • It's open-source and free to use, allowing you to inspect and modify the code
  • Provides visibility into Claude API usage and associated costs, helping avoid unexpected bills
  • Lightweight and focused on a specific need rather than being bloated with unnecessary features
  • Community-driven projects on GitHub often benefit from transparency and user contributions

Recommended for

  • Developers actively building applications with the Claude API
  • Individuals or teams wanting to monitor and control their API spending
  • Users comfortable with open-source tools and self-hosting or local setup
  • Cost-conscious developers who prefer free alternatives to commercial usage-tracking services

Category Popularity

0-100% (relative to Usage4Claude and ForthWrite)
AI
68 68%
32% 32
Email Productivity
0 0%
100% 100
Developer Tools
100 100%
0% 0
SEO
100 100%
0% 0

Questions & Answers

As answered by people managing Usage4Claude 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 Usage4Claude and ForthWrite

Usage4Claude 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)

Social recommendations and mentions

Based on our record, Usage4Claude 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.

Usage4Claude mentions (1)

  • Show HN: macOS menu bar gauges for your Claude Code quota
    Lol how many of these things are there. I've been using https://github.com/f-is-h/usage4claude which includes Codex usage (I use Claude and Codex). - Source: Hacker News / 27 days 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 Usage4Claude and ForthWrite, you can also consider the following products

AIQuotaBar - See your Claude.ai and ChatGPT usage limits live in your macOS menu bar - yagcioglutoprak/AIQuotaBar

Superhuman - Superhuman is an email management tool.

CodeQuota - Free macOS menu bar app to monitor your Claude Pro/Max and GitHub Copilot premium request usage in real time. OAuth setup โ€” no cookies required. Open source.

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.

Usage for Mac - The most advanced and modern monitoring for your Mac!

Lavender - Realtime coaching for sales emails.