Software Alternatives, Accelerators & Startups

RunwayML VS ForthWrite

Compare RunwayML VS ForthWrite and see what are their differences

RunwayML logo RunwayML

Create impossible video

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
  • RunwayML Landing page
    Landing page //
    2023-09-20
  • 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.

RunwayML

$ 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

RunwayML features and specs

  • User-Friendly Interface
    RunwayML offers an intuitive interface that allows users with varying technical expertise to easily navigate through the platform and use machine learning models without needing extensive coding knowledge.
  • Pre-Trained Models
    The platform provides a wide array of pre-trained models that can be easily implemented for different tasks such as image generation, object detection, and more, saving time on model training and preparation.
  • Real-Time Collaboration
    RunwayML supports real-time collaboration features, making it easier for teams to work together on machine learning projects, share insights, and make collective decisions.
  • Integration with Popular Tools
    RunwayML integrates seamlessly with popular creative software like Adobe Photoshop, Unity, and other digital tools, enhancing its utility for creative professionals.
  • Accessibility
    The platform is hosted in the cloud, which means users can access its features from anywhere with an internet connection, facilitating remote work and collaboration.

Possible disadvantages of RunwayML

  • Subscription Costs
    While RunwayML offers powerful tools and a free tier, advanced features and higher usage quotas come at a subscription cost, which may be a barrier for individual users or small teams with limited budgets.
  • Dependence on Internet Connection
    Because it's cloud-based, RunwayML requires a stable internet connection to function effectively. Poor connectivity can hinder performance and accessibility.
  • Limited Customization Options
    Although RunwayML provides a range of pre-trained models, the level of customization for these models might not meet the needs of users requiring highly specific or intricate adjustments.
  • Learning Curve for Advanced Features
    While the basic functionalities are user-friendly, mastering the more advanced features and getting the most out of the platform requires a certain level of expertise in machine learning.
  • Scalability Issues
    For very large-scale or highly specialized projects, the platform's resources and tools might not be sufficient, necessitating alternative or supplementary solutions.

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 RunwayML

Overall verdict

  • Yes, RunwayML is generally considered a good tool for creative professionals and artists who want to integrate machine learning into their workflows.

Why this product is good

  • RunwayML provides an accessible platform for creatives to leverage machine learning models without requiring deep technical expertise in AI. It offers a user-friendly interface, seamless integration with other tools, and a growing library of pre-trained models that can be easily applied to various creative projects ranging from video editing to generative art.

Recommended for

  • Video editors looking to enhance their projects with AI-driven effects and editing tools.
  • Artists who want to experiment with generative art using machine learning models.
  • Designers aiming to incorporate unique AI elements into their work.
  • Educators and students interested in exploring AI and ML in creativity-focused fields.
  • Developers seeking to prototype with machine learning models quickly without extensive coding.

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

RunwayML videos

RunwayML Live Demo: AI/ML Easy Object Removal With New Inpainting Tool

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to RunwayML and ForthWrite)
AI
98 98%
2% 2
Writing Tools
0 0%
100% 100
AI Video Generator
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing RunwayML 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 RunwayML and ForthWrite

RunwayML Reviews

Top 11 AI Image Generators to Try in 2024
In summary, RunwayML is perfect for creatives who need a versatile and comprehensive tool for their multimedia projects. Whether youโ€™re working on images, videos, or audio, this platform offers the functionality and ease of use to bring your ideas to life.

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, RunwayML seems to be more popular. It has been mentiond 54 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.

RunwayML mentions (54)

  • The Text Field is the New Dashboard
    The guy: Matthew Gallagher, 41. He spent $20,000 and two months building Medvi, a GLP-1 weight-loss telehealth company, from his living room in Los Angeles. The stack: ChatGPT, Claude, and Grok writing code. Midjourney for images. Runway for video ads. ElevenLabs handling customer calls. Custom AI agents stitching it all together. His only full-time hire was his brother. - Source: dev.to / 2 months ago
  • [2025 Guide] Transform Photos: Best Image to Video AI Tools
    Tools range from cinematic generators like Runway to specialized D2C platforms like Koro that automate product showcases. - Source: dev.to / 7 months ago
  • Adaptive Branding: How Logos and Colors Will Evolve with AI
    Curious how AI tools generate adaptive design assets? Check out Runway ML and Adobe Firefly for real examples. - Source: dev.to / 9 months ago
  • AI Threat to Tech, Marketing and Creative Jobs
    RunwayML handles background removal, stylizing, and even AI video editing. - Source: dev.to / about 1 year ago
  • Runway Gen-4: What it is , How to Access & Use
    Runway has unveiled its new AI video model, Gen-4. The company explains that the model can create consistent scenes and characters across multiple shots. It is difficult for users to tell a coherent story in AI-generated videos, especially when it comes to character generation. According to a press release shared by Runway on X, the new Gen-4 will give users more continuity and control while telling a story. - Source: dev.to / over 1 year ago
View more

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 RunwayML and ForthWrite, you can also consider the following products

Midjourney - Midjourney lets you create images (paintings, digital art, logos and much more) simply by writing a prompt.

Superhuman - Superhuman is an email management tool.

KLING AI - Next-Generation Al Creative Studio

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.

Pika - 100% ESM. A new kind of package registry that does more for you. Write once, run on any platform.

Lavender - Realtime coaching for sales emails.