Software Alternatives, Accelerators & Startups

ForthWrite VS ByViewer

Compare ForthWrite VS ByViewer and see what are their differences

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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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ByViewer logo ByViewer

ByViewer is an anonymous Instagram Story viewer that lets you view and download public stories, reels, and highlights without logging in. You remain invisible โ€” no trace, no registration needed.
  • 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.

Not present

ByViewer is a fast, secure, and completely anonymous Instagram Story viewer designed for anyone who wants to watch or download public Instagram content without logging in. With ByViewer, you can instantly access stories, reels, photos, highlights, and profiles โ€” all without leaving any trace. No account is required, and your identity stays fully hidden.

Simply enter a username and start viewing anonymously. You can also download high-quality media in one click, making it ideal for users, marketers, researchers, and creators who need quick access to public Instagram content.

ByViewer is 100% free, mobile-friendly, and optimized for speed. There's no app installation, no registration, and no limitations. Whether you're browsing casually or using it for work, ByViewer offers a clean, simple, and privacy-focused experience.

Perfect for:

Viewing Instagram Stories privately

Downloading stories, reels, and highlights

Saving public posts without logging in

Accessing Instagram content anonymously on any device

Stay invisible. Stay private. Use Instagram without being seen โ€” with ByViewer.

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

ByViewer

Pricing URL
-
$ Details
free
Platforms
-
Release Date
2025 November
Startup details
Country
United States
State
CA
Employees
1 - 9

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

ByViewer features and specs

  • Specialized BIM Viewing
    ByViewer provides a dedicated platform for viewing BIM (Building Information Modeling) files, allowing users to open and explore complex 3D building models without needing expensive full-featured BIM software like Revit or ArchiCAD.
  • Web-Based Accessibility
    As a web-based viewer, ByViewer allows users to access and view BIM models directly from a browser without the need to install heavy desktop software, making it convenient for on-the-go access and collaboration.
  • Easy Collaboration
    ByViewer facilitates sharing and collaboration among project stakeholders such as architects, engineers, and contractors by providing a common platform to review models without requiring everyone to have specialized software licenses.
  • Lightweight and Fast
    The tool is designed to be lightweight, enabling users to quickly load and navigate 3D models without the high hardware requirements typically associated with full BIM authoring tools.
  • Cost-Effective Solution
    ByViewer offers a more affordable alternative for teams and individuals who only need to view and review BIM files rather than create or edit them, reducing overall project software costs.

Possible disadvantages of ByViewer

  • Limited Editing Capabilities
    As a viewer-only tool, ByViewer does not allow users to create or make significant edits to BIM models, meaning users still need separate authoring software for design and modification work.
  • Limited File Format Support
    ByViewer may not support all BIM file formats comprehensively, potentially limiting its usefulness for teams that work with a wide variety of modeling tools and proprietary formats.
  • Internet Dependency
    Being a web-based tool, ByViewer requires a stable internet connection to function properly, which can be a limitation on construction sites or in areas with poor connectivity.
  • Lesser Known Platform
    Compared to more established viewers like Autodesk Viewer or BIMcollab, ByViewer has a smaller user community, which means fewer online resources, tutorials, and community support for troubleshooting.
  • Performance with Large Models
    Browser-based viewers can struggle with very large or complex BIM models, potentially leading to slower performance, lag, or rendering issues compared to desktop-based alternatives.

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

Analysis of ByViewer

Overall verdict

  • ByViewer appears to be a niche online tool/service, but there is limited independent, verifiable information available about its reliability, security practices, and overall reputation, so it should be approached with caution and researched further before use.

Why this product is good

  • Limited third-party reviews or independent verification of the service's claims and performance
  • Lack of transparency regarding company background, ownership, and data handling practices makes it hard to assess trustworthiness
  • No strong, widely recognized user base or established track record compared to more well-known alternatives in its category
  • Potential privacy or security concerns typical of lesser-known online viewer/utility tools that request access to accounts or content

Recommended for

  • Users who need a quick, casual solution and are willing to accept some uncertainty about the service's credibility
  • Those who first verify the site's legitimacy, read recent user feedback, and avoid entering sensitive personal or account information
  • Not recommended for users requiring guaranteed data privacy, security compliance, or dealing with sensitive/professional content

Category Popularity

0-100% (relative to ForthWrite and ByViewer)
Email
100 100%
0% 0
Social Media Tools
0 0%
100% 100
Email Productivity
100 100%
0% 0
Instagram
0 0%
100% 100

Questions & Answers

As answered by people managing ForthWrite and ByViewer.

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 ForthWrite and ByViewer. 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 ForthWrite and ByViewer

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)

ByViewer Reviews

We have no reviews of ByViewer yet.
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What are some alternatives?

When comparing ForthWrite and ByViewer, you can also consider the following products

ReclaimAI - Helps users prioritize their work and personal calendars

Hashtagify.me - Free hashtags search engine, with paid advanced analytics

Superhuman - Superhuman is an email management tool.

IG Story Viewer - Anonymous Instagram story viewer, stalk someone's story without an account. Watch Instagram stories privately without them knowing. Download Insta story videos and photos online in high quality.

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

Inflact - Sell on Instagram, build your audience, curate content with the right set of tools.