Software Alternatives, Accelerators & Startups

Hesuvi VS ForthWrite

Compare Hesuvi 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.

Hesuvi logo Hesuvi

Hesuvi imitates the binaural sound effect of many surround virtualizations by making use of...

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.
  • Hesuvi Landing page
    Landing page //
    2023-10-21
  • 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.

Hesuvi

Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12 / 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

Hesuvi features and specs

  • Cost
    Hesuvi is free and open-source, making it accessible without any financial investment. This is ideal for users looking to experience virtual surround sound without spending money.
  • Customization
    It provides extensive customization options, allowing users to tailor the sound experience to their preferences. This includes adjustment of virtual surround sound parameters and applying specific Head-Related Transfer Function (HRTF) profiles.
  • Compatibility
    The software is compatible with a wide range of audio formats and devices. It works on various Windows versions and supports multiple types of audio hardware.
  • Sound Quality
    Hesuvi can significantly enhance sound quality, providing a more immersive audio experience, particularly for gaming and watching movies.

Possible disadvantages of Hesuvi

  • Complexity
    The software can be complex to set up, particularly for users who are not tech-savvy. Extensive customization options might be overwhelming and not user-friendly for beginners.
  • Documentation
    Limited and sometimes outdated documentation can pose challenges for users trying to troubleshoot issues or fully utilize Hesuviโ€™s features.
  • Performance Impact
    Running Hesuvi requires CPU resources, which might lead to a noticeable performance impact especially on lower-end systems or when running resource-intensive applications simultaneously.
  • Compatibility Issues
    Although generally compatible, there can be specific hardware or software setups where Hesuvi may not work optimally, leading to potential glitches or inconsistent audio quality.

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 Hesuvi

Overall verdict

  • Hesuvi is considered a good tool for users interested in improving their audio experience through virtual surround sound. Its ability to enhance spatial sound perception makes it a worthwhile tool for audiophiles and gamers who want to get more immersive audio experiences.

Why this product is good

  • Hesuvi is beneficial for users looking to simulate different headphone surround sound environments. It is based on EqualizerAPO and provides Head Related Transfer Function (HRTF) processing, which can enhance the audio experience for applications like music and gaming. The tool supports a variety of HRTF profiles, allowing users to customize their surround sound setup to best suit their preferences.

Recommended for

    Hesuvi is recommended for audiophiles, gamers, and users who enjoy customizing their audio settings. It is particularly useful for those who wish to experience enhanced surround sound without investing in more expensive audio hardware. Users with knowledge of audio processing and setting up sound software on Windows will benefit the most from it.

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

Hesuvi videos

HeSuVi 7.1 Virtual Surround Comparison - All Common HRTF ๐ŸŽง (Windows Sonic vs Dolby Atmos, CMSS-3D)

More videos:

  • Tutorial - How to install and configure HeSuVi - 7.1 Surround Virtualizer
  • Review - HeSuVi: Windows Sonic vs Dolby Atmos vs Razer Surround vs Dolby Headphone vs SBX Surround vs CMSS-3D

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Hesuvi and ForthWrite)
Audio
100 100%
0% 0
Email
0 0%
100% 100
Audio & Music
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Hesuvi 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 Hesuvi 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 Hesuvi and ForthWrite

Hesuvi Reviews

We have no reviews of Hesuvi 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, Hesuvi seems to be more popular. It has been mentiond 50 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.

Hesuvi mentions (50)

  • How can people hear things I can't?
    Best method I've found so far is to use a few free programs in tandem: Equalizer APO as audio controller with LoudMax vst (to compress gunshots) Peace EQ (for headphone optimization and EQ fine tuningโ€”crickets, rain hiss, etc), and HeSuVi with the included wavesnx preset, which will convert your stereo audio into virtualized 7.1 surround (remember to configure speakers in control panel for 7.1), which is the true... Source: over 3 years ago
  • Switched to Topping DX3 Pro+ with Sundara headphones need advice
    The easiest way to replicate that is Equalizer APO with HeSuVi. You can use whatever surround implementation works best for you and it can be worth to switch them out depending on the application. Source: over 3 years ago
  • Sound Blaster G1 + DT 990 pro (250ohm)
    Or you could buy a more powerful dongle like Tempotec Sonara II (2V RMS and an ESS chip) or even the Apple dongle in a local electronics store (I use a Samsung one with Sennheiser HD 700 and AKG K702 and get enough volume, even after EQ) and apply virtual surround completely in software (for free), using HeSuVi. Source: over 3 years ago
  • SteelSeries Sonar Virtual Audio Devices not working.
    Also 'virtual surround sound' headphones are snake oil. Don't pay extra for something you can get for free. https://sourceforge.net/projects/hesuvi/ No special hardware required. Source: over 3 years ago
  • Has anyone tried both sxfi headphone(s) and VZR model one or Audeze penrose or Steelseries pro
    If you really want, you can use a lot of them for free with stuff like HeSuVi. Which makes a lot of sense because again, they all suck in their own way and you kinda have to find the one that sucks the least for every application. Source: over 3 years 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 Hesuvi and ForthWrite, you can also consider the following products

Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities

ReclaimAI - Helps users prioritize their work and personal calendars

Razer Surround - Razer Surround audio software features 7.

Superhuman - Superhuman is an email management tool.

Letasoft Sound Booster - Boosts sound volume above maximum level

Shortwave - Email smarter & faster with a reinvented experience for your Gmail