Software Alternatives, Accelerators & Startups

Spirit VS ForthWrite

Compare Spirit VS ForthWrite and see what are their differences

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Spirit logo Spirit

The animation tool for the web.

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
  • Spirit Landing page
    Landing page //
    2023-09-18
  • 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.

Spirit

$ 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

Spirit features and specs

  • User-Friendly Interface
    Spirit offers an intuitive and easy-to-navigate interface, making it accessible for users with varying levels of technical expertise.
  • Collaboration Features
    The app provides robust collaboration tools, such as real-time editing and commenting, which enhance team productivity and communication.
  • Integration Capabilities
    Spirit integrates seamlessly with popular third-party tools and services, such as Google Drive, Slack, and Trello, streamlining workflow processes.
  • Customizability
    Users can customize their workspaces and project templates, which allows for a more personalized and efficient work environment.
  • Affordability
    Spirit offers competitive pricing plans that provide good value for the features and services offered, making it accessible for both small and large teams.

Possible disadvantages of Spirit

  • Limited Offline Functionality
    The app requires an active internet connection for most of its features, which can be a drawback for users who need offline access.
  • Learning Curve
    While the interface is user-friendly, some advanced features may require a learning period, especially for users who are new to project management tools.
  • Performance Issues
    Some users have reported occasional performance lags and slow loading times, especially when handling large projects or datasets.
  • Mobile App Limitations
    The mobile version of Spirit lacks some functionalities that are available on the desktop version, which may limit productivity for users who are frequently on the go.
  • Customer Support
    While customer support is available, some users have experienced delays in response times, which can be frustrating when encountering issues.

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 Spirit

Overall verdict

  • Spirit (spiritapp.io) is generally considered a good tool for those who want to build high-quality animations and interactive user interfaces.

Why this product is good

  • Intuitive Interface: Spirit offers an easy-to-use interface that simplifies the process of creating animations.
  • Real-time Collaboration: It allows teams to work together in real-time, making it ideal for creative collaborations.
  • Powerful Features: Spirit comes with a range of features such as timeline-based editing and keyframes, enabling detailed control over animations.
  • Web Integration: It provides seamless integration for web developers, supporting a variety of web technologies.
  • Community and Support: There is an active community and ample resources available for users seeking help or inspiration.

Recommended for

  • UX/UI Designers: Those looking to enhance user interfaces with smooth and interactive animations.
  • Web Developers: Developers who want to incorporate animations into their projects efficiently.
  • Animation Enthusiasts: People interested in exploring and creating web-based animations.
  • Teams: Collaborative groups that need to work on animation projects together in real-time.

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

Spirit videos

Spirit Airlines - Review of my first flights | Good, average, and terrible parts of Spirit

More videos:

  • Review - Spirit Airlines Review & Horror Story!! Why You Shouldn't Fly on Spirit Airlines
  • Review - My Spirit Stallion of The Cimarron Review

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Spirit and ForthWrite)
Design Tools
100 100%
0% 0
Writing Tools
0 0%
100% 100
Animation
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Spirit 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 Spirit and ForthWrite

Spirit Reviews

We have no reviews of Spirit yet.
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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, Spirit 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.

Spirit mentions (3)

  • Workflow for creating animated assets
    For animating illustrations, highly recommend Jitter: https://jitter.video/ (you export a Figma design to their tool, set a few keyframes, and export a video/Lottiefile--super easy). LottieFiles, LottieLabs, and Spirit are other options. Source: over 2 years ago
  • I used React to build an After Effects clone
    A few of them: Https://rive.app/ Https://spiritapp.io/ Https://www.svgator.com/. Source: over 4 years ago
  • Web designers and developers out here, what do you think of this idea?
    I'm glad you asked. The image is in svg format and I have used Greensock to animate the layers. But you can chuck all of that and use a tool like https://spiritapp.io or After Effects for svg animations. 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 Spirit and ForthWrite, you can also consider the following products

Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.

Superhuman - Superhuman is an email management tool.

Haiku Animator - Create powerful animations for any app or website

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.

Pinreel - Pinreel is lightweight application software that is used to create fun and interesting animation videos by using pro-level templates.

Lavender - Realtime coaching for sales emails.