Software Alternatives, Accelerators & Startups

HeyGen VS ForthWrite

Compare HeyGen VS ForthWrite and see what are their differences

HeyGen logo HeyGen

Create videos from text in minutes with AI-generated avatars and voices.

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
  • HeyGen Landing page
    Landing page //
    2026-01-23
  • 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.

HeyGen

Website
heygen.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

HeyGen features and specs

  • User-Friendly Interface
    HeyGen offers a clean and intuitive interface that makes it easy for users to navigate and create videos, even with little to no experience.
  • Wide Range of Templates
    The platform provides a vast array of templates to help users start their projects quickly and effectively by simply customizing pre-designed elements.
  • High-Quality Output
    HeyGen ensures that the video outputs are of high quality, making it suitable for professional use without compromising on the clarity and resolution.
  • Cloud-Based Platform
    Being cloud-based, HeyGen allows users to access their projects from anywhere with an internet connection, ensuring flexibility and ease of collaboration.
  • Real-Time Collaboration
    The platform supports real-time collaboration features, allowing multiple users to work on a project simultaneously, which enhances teamwork and productivity.

Possible disadvantages of HeyGen

  • Limited Offline Functionality
    Because HeyGen is primarily a cloud-based solution, it offers limited functionality when offline, which can be a drawback for users without consistent internet access.
  • Subscription Cost
    While offering powerful tools, HeyGen might be costly for users or small businesses on a tight budget, as it operates on a subscription-based model.
  • Learning Curve for Advanced Features
    Although the basic interface is user-friendly, mastering advanced features may require a learning curve, particularly for users not familiar with video editing concepts.
  • Dependency on Internet Speed
    HeyGenโ€™s performance is highly dependent on the user's internet speed, as uploading and processing large video files can be time-consuming with slower connections.
  • Limited Customization in Some Templates
    Some users may find that certain templates offer limited customization options, which can restrict creativity if specific design elements are essential for their project.

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

HeyGen videos

HeyGen vs Synthesia

More videos:

  • Review - Heygen AI Avatar 2.0 is INSANE - Create a AI Clone!
  • Review - Heygen Ai Review 2023 (Pricing, CRAZY Features, Pros & Cons)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to HeyGen and ForthWrite)
AI
99 99%
1% 1
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 HeyGen 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 HeyGen and ForthWrite. For example, how are they different and which one is better?
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Reviews

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

HeyGen Reviews

  1. Tony Lein
    ยท Working at FAQ Ally ยท
    Outstanding product for fast, professional video creation

    HeyGen is a great tool for creating professional-looking videos quickly and easily. The platform is intuitive, the results look polished, and it saves a huge amount of time compared to traditional video creation.

    Itโ€™s reliable, well-designed, and genuinely useful for anyone who needs quality video content without complexity. Highly recommend it.

    ๐Ÿ‘ Pros:    Great video quality

Top Free Tools to Make AI Spokesperson Videos Instantly
If you're focused on fast, voiceover-driven content without being on camera, Videobytes AI is the perfect beginner-friendly option. For those looking for full AI avatars, Synthesia, HeyGen, and Elai.io offer amazing results with slightly steeper learning curves.
Source: videobytes.ai
Top 10 Best AI Avatar Generators in 2024
At HeyGen, marketing developers can uncover various tools and features to create AI avatars in different poses, styles, and languages. Furthermore, there are two ways to create an AI avatar; one is through text, and the other is through video instructions. This tool also offers unique avatars of different ethnicities, ages, and poses. In addition, you can create a video with...
Top 10 AI Video Generators to Use in 2023
HeyGen is an AI video platform that helps you create engaging business videos, as easily as creating PowerPoints for various use cases. It allows you to record & upload your real voice to create a custom Avatar or simply type in the text that you want.

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, HeyGen 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.

HeyGen mentions (1)

  • [D] AI Video Avatar Open Source
    Does anyone know or have a guess at what are the machine learning models being used behind services like heygen.com or https://www.synthesia.io ? Source: over 2 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 HeyGen and ForthWrite, you can also consider the following products

KLING AI - Next-Generation Al Creative Studio

Superhuman - Superhuman is an email management tool.

InVideo.io - Create thumb-stopping videos in mins for just $10/month even if you've never edited a video before!

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.

Synthesia.io - Create AI videos by simply typing in text. Make engaging videos for e-learning, customer onboarding, etc. No need for actors, cameras or audio equipment.

Lavender - Realtime coaching for sales emails.