Software Alternatives, Accelerators & Startups

Butter.us VS ForthWrite

Compare Butter.us VS ForthWrite and see what are their differences

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Butter.us logo Butter.us

Virtual workshops smooth as butter

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
  • Butter.us Landing page
    Landing page //
    2023-09-01

With Butter, you can energise your virtual workshops with ease.

Put your focus back into running interactive and collaborative workshops, and less on managing multiple tools with Butter. Itโ€™s built with all the tools you need to run interactive and collaborative sessions.

๐Ÿš€ Less app- or tab-switching! Collaborate using different tools thatโ€™s integrated into directly Butter. Access Miro, Google Drive, YouTube and Whiteboard from Butter. ๐Ÿ‘จ๐Ÿผโ€๐ŸŽ“ Plan your entire sessions in advance. Easily set up the agenda, polls, timers and breakouts ahead of the session. ๐Ÿ’ฅ Bring a lot more energy to your sessions! Make your sessions delightful and interactive with fun reactions, GIF chats and polls! ๐Ÿค Manage breakouts with ease. Move instantly between breakout rooms - and peek in to see how things are going!

  • 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.

Butter.us

Website
butter.us
$ Details
-
Platforms
Google Chrome Firefox
Release Date
2020 June

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

Butter.us features and specs

  • Flexible Budget Management
    Butter.us offers an intuitive platform for users to manage their budgets flexibly, allowing them to easily track expenses and adjust financial plans as needed.
  • User-Friendly Interface
    The website provides a user-friendly interface that makes it easy for individuals to navigate through their financial information efficiently.
  • Customizable Categories
    Users can customize spending categories to suit their specific financial needs, enabling better organization and tracking of expenses.
  • Automated Expense Tracking
    Butter.us automates the process of tracking expenses by linking to users' bank accounts, saving time and reducing manual entry errors.

Possible disadvantages of Butter.us

  • Subscription Cost
    Users might find the subscription cost a barrier, especially those who are looking for comprehensive free financial management tools.
  • Privacy Concerns
    Some users may be concerned about privacy and security when linking their bank accounts and personal financial information to the platform.
  • Limited Features in Free Plan
    The free plan offers limited features, which might not be sufficient for users needing advanced budgeting capabilities.
  • Dependence on Internet Connectivity
    Butter.us requires an internet connection to access financial data, which can be a limitation in areas with unreliable connectivity.

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

Butter.us videos

ButterMixer Vol. 03

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Butter.us and ForthWrite)
Productivity
100 100%
0% 0
Writing Tools
0 0%
100% 100
Communication
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Butter.us 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 Butter.us 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 Butter.us and ForthWrite

Butter.us Reviews

We have no reviews of Butter.us yet.
Be the first one to post

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, Butter.us seems to be more popular. It has been mentiond 4 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.

Butter.us mentions (4)

  • Zoom is a state of the art service!
    We've been playing with butter.us for internal and external video calls. The extra integration layer for content sharing and working together is pretty neat. Check it out too. Source: about 4 years ago
  • Ask HN: Who is hiring? (May 2021)
    Butter | Full Time | REMOTE (Work From Anywhere) | https://careers.butter.us At Butter (https://butter.us), we're building the most powerful and delightful platform to facilitate online workshops and trainings. Our main tech stack: GraphQL, NodeJS, React, React Native, NextJS, Redux, Python, Postgres, SocketIO. Benefits: Work from whenever, forever. Flexible work hours. Equipment budget. Unlimited paid vacation.... - Source: Hacker News / about 5 years ago
  • Remote Hiring Is Broken (And How We're Trying To Solve It)
    Weโ€™re a tech company, and weโ€™re building software. Our website is https://butter.us The talents we hire are very specialized and technical, so that adds to the complexity. Source: about 5 years ago
  • Bruin Roommate Mixer!
    Hey there! Weโ€™re hosting a bruin roommate mixer at 8:00pm this Friday. The mixer will be held on butter.us (which requires a computer) and uses video chatting. Students will be put into 1-1 breakout rooms that will shuffle around every 5 minutes. You can RSVP using the link below (verified students only!). 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 Butter.us and ForthWrite, you can also consider the following products

Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where youโ€™re located, all in one platform.

Superhuman - Superhuman is an email management tool.

SoWork - Where remote teams collaborate. From anywhere. SoWork is the only virtual workplace.

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.

Gather Town - Spatial video-chat worlds for work and play

Lavender - Realtime coaching for sales emails.