Software Alternatives, Accelerators & Startups

Serum VS ForthWrite

Compare Serum VS ForthWrite and see what are their differences

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Serum logo Serum

VST for FL Studio, Ableton Live, and many other VST supported DAWs. Heavily utilized in EDM.

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.
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  • Serum Landing page
    Landing page //
    2020-03-04

The dream synthesizer did not seem to exist: a wavetable synthesizer with a truly high-quality sound, visual and creative workflow-oriented interface to make creating and altering sounds fun instead of tedious, and the ability to โ€œgo deepโ€ when desired - to create / import / edit / morph wavetables, and manipulate these on playback in real-time.

  • 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.

Serum

Pricing URL
-
$ Details
-
Platforms
-
Release Date
2014 January

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

Serum features and specs

  • High-Quality Sound Engine
    Serum is renowned for its pristine sound quality, thanks to a high-precision resampling algorithm. This ensures that even complex waveforms and modulations maintain clarity and fidelity.
  • User-Friendly Interface
    The interface is well-designed and intuitive, allowing both beginners and experienced users to navigate and create sound patches with ease. Visual feedback makes the synthesis process more understandable.
  • Advanced Modulation Options
    Serum offers extensive modulation capabilities, including drag-and-drop routing, multiple LFOs, and envelopes. This provides users with countless possibilities for shaping their sounds dynamically.
  • Built-In Wavetable Editor
    The wavetable editor allows users to visually manipulate and create their own unique wavetables, offering more customization and flexibility in sound design.
  • Extensive Preset Library
    Comes with a rich library of presets covering various genres, making it easy to find starting points for sound design or to use directly in compositions.
  • Regular Updates and Support
    Xfer Records frequently updates Serum to include new features, optimizations, and bug fixes, ensuring that users have access to the latest advancements in wavetable synthesis.

Possible disadvantages of Serum

  • Resource Intensive
    Serum can be quite demanding on CPU resources, particularly when multiple instances are used simultaneously or when complex modulations are applied.
  • Price
    Compared to some other soft synths, Serum is relatively expensive, which might be a barrier for entry-level producers or those on a tight budget.
  • Learning Curve
    While the interface is user-friendly, the depth of features and possibilities in Serum may be overwhelming for beginners. It requires time and effort to fully understand and utilize all of its capabilities.
  • Limited Sample-Based Synthesis
    Serum is primarily a wavetable synthesizer and might not be the best tool for producers looking to work extensively with sample-based synthesis or sampling-focused workflows.

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 Serum

Overall verdict

  • Yes, Serum is considered to be a good software synthesizer.

Why this product is good

  • Serum is known for its high-quality sound and versatile range of waveforms.
  • It features a user-friendly interface which makes it accessible for both beginners and experienced producers.
  • The software includes a powerful wavetable editor and a range of modulation options for creative sound design.
  • It has a large and active community, providing a wealth of presets and tutorials to enhance user experience.
  • Regular updates and support from Xfer Records ensure it remains a competitive choice in its field.

Recommended for

  • Electronic music producers looking for a versatile synthesizer.
  • Sound designers interested in experimenting with complex waveforms and modulation techniques.
  • Beginners in music production who want to explore a professional-grade synthesizer with a user-friendly interface.
  • Professional music producers seeking a reliable and popular synthesis tool for their projects.

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

Serum videos

THIS PLUGIN IS JUST REALLY REALLY GOOD!!! (Serum Plugin Review)

More videos:

  • Review - SERUM | 5 Reasons we Love Serum in 5 Minutes
  • Review - TOP 5 Serums | suhaysalim

ForthWrite videos

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

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Category Popularity

0-100% (relative to Serum and ForthWrite)
Email Marketing
100 100%
0% 0
Writing Tools
0 0%
100% 100
Audio & Music
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Serum 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 Serum 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 Serum and ForthWrite

Serum Reviews

We have no reviews of Serum 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, Serum seems to be more popular. It has been mentiond 30 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.

Serum mentions (30)

  • Complete rookie looking for advice on a MIDI controller for Darksynth
    What matters though is choosing a good synthesizer. I personally use Serum (~190$) for most things, since it's easy to use and has a big community with a lot of free and paid presets. Source: almost 3 years ago
  • DIY Wavetable Synthesis Sequencer
    One of the problems I am currently facing is having a large lookup table. I want to have a large set of predefined sound waves that can be manipulated like programs such as Serum. Is this still possible with an MC instead of an MCU? (Calculating the waves in real-time instead of using a lookup table might be too computationally intensive for most budget options). Source: about 3 years ago
  • SPEECH plugin crashing? No audio!
    You'll have to find some other alternative for your Text-to-speech needs. Serum has a basic speech synth, Vital uses Amazon's TTS solution, and you'll find plenty more with a quick google search. Source: about 3 years ago
  • I'm looking into some cheap synthesizers to make vaporwave/synthwave music
    You can also download Vital for wavetable emulation. https://www.discodsp.com/obxd/ You can also buy Serum https://xferrecords.com/products/serum for I think $190 or get it off Splilce for $10 a month until you pay it off. Source: about 3 years ago
  • Chiptune style remix of Frog on the floor
    Then all the synths are serum, in previous projects I have used magical 8 bit and tb_peach. Source: about 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 Serum and ForthWrite, you can also consider the following products

Vital - Vital is a spectral warping wavetable synthesizer with drag'n'drop modulation workflow and animated preview of the synth's inner workings where needed. Comes with many modulation sources (including audio-rate), MPE support and FX chain.

Superhuman - Superhuman is an email management tool.

Omnisphere - Piano, pad and synth VST for DAW's.

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.

iZotope Vinyl - iZotope Vinyl is a plugin that gives you the tools to cut, shuffle and alter your audio content to give it that lo-fi vinyl sound.

Lavender - Realtime coaching for sales emails.