Software Alternatives, Accelerators & Startups

imapsync VS ForthWrite

Compare imapsync VS ForthWrite and see what are their differences

imapsync logo imapsync

Console-based utility for migrating IMAP mailboxes.

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
  • imapsync Landing page
    Landing page //
    2023-09-12
  • 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.

imapsync

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

imapsync features and specs

  • Compatibility
    Supports many IMAP servers, both free and commercial, ensuring broad applicability for different email systems.
  • Incremental Syncing
    Only copies new or changed emails, which reduces redundant data transfer and speeds up the syncing process.
  • Comprehensive Documentation
    Provides detailed and clear documentation, which helps users to set up and troubleshoot issues effectively.
  • Command Line Interface
    Allows for scriptable and automated email migrations, suitable for batch operations and large-scale deployments.
  • Open Source
    Freely available source code, which can be customized according to the specific needs of the user.

Possible disadvantages of imapsync

  • Complex Configuration
    Command-line interface and numerous options might be overwhelming for users who are not technically savvy.
  • Performance on Large Mailboxes
    Can be slow when dealing with very large mailboxes, potentially extending migration time.
  • Cost for Latest Version
    Although the software is open source, the latest version requires a purchase, which might not be ideal for all users.
  • No GUI
    Lacks a graphical user interface, which could have made it more accessible for non-technical users.
  • Dependency Management
    Requires dependencies that need to be manually installed, which can add complexity to the initial setup process.

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 imapsync

Overall verdict

  • Imapsync is generally considered a good and effective solution for migrating or syncing emails between IMAP servers. It is highly recommended for those who need a reliable and customizable tool for handling email migrations.

Why this product is good

  • Imapsync is a well-regarded tool for syncing emails between IMAP servers. It is particularly valued for its ability to effectively handle large volumes of emails and maintain the integrity of email metadata during transfers. The tool is robust, reliable, and has a strong track record in both individual and enterprise environments. It also supports a command-line interface, making it flexible for automation and scripting.

Recommended for

    Imapsync is recommended for system administrators, IT professionals, and anyone who needs to perform email migrations or backups. It is particularly beneficial for those working in environments that require the transfer of large quantities of emails, maintaining folder structure, and ensuring data integrity between different email services.

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

imapsync videos

Migration Google Apps Mail or Gmail to Zimbra Mail with imapsync

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 imapsync and ForthWrite)
Email
79 79%
21% 21
Monitoring Tools
100 100%
0% 0
Email Productivity
0 0%
100% 100
Email Service Provider
100 100%
0% 0

Questions & Answers

As answered by people managing imapsync 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 imapsync 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 imapsync and ForthWrite

imapsync Reviews

We have no reviews of imapsync 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, imapsync seems to be more popular. It has been mentiond 57 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.

imapsync mentions (57)

  • Users fume over Outlook.com email 'carnage'
    > I can't imagine how I would migrate to another email address Imapsync is your best friend for this. https://github.com/imapsync/imapsync https://imapsync.lamiral.info/. - Source: Hacker News / 5 months ago
  • Migrate Wizard โ€“ IMAP Based Email Migration Tool
    I love imapsync: https://imapsync.lamiral.info This is the way projects used to be, and surprisingly excellent ones still are. The amount of knowledge built into this is incredible: https://imapsync.lamiral.info/S/news.shtml. - Source: Hacker News / 6 months ago
  • Imapsync
    The author disagrees with you https://github.com/imapsync/imapsync/issues/257#issuecomment-741225371 is because: - I earn my leaving from imapsync buyers but less likely on donators, as a measured fact. - Donations work 1/100 less than payments, ie, for $1 from donators I get $100 of buyers. - I don't make the github release, Nicolas does, and Nicolas doesn't include the .exe binary in the repository, it is a... - Source: Hacker News / over 1 year ago
  • Ask HN: Are there any CLI only tools that are monetised
    Https://imapsync.lamiral.info Bought it to transfer mail from SMTP to Office365. Worth every penny. - Source: Hacker News / over 1 year ago
  • Purelymail: Cheap Email for Everyone
    Another happy Purelymail customer here (5 years). If anyone needs to move mail storage from one IMAP server to another (eg; Purelymail) I can highly recommend https://imapsync.lamiral.info/ Not for it's website graphic design, but as a CLI tool that works perfectly. "source server -->> target server" and let it run. - Source: Hacker News / 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 imapsync and ForthWrite, you can also consider the following products

OfflineIMAP - OfflineImap synchronizes email between an IMAP server and a MailDir or between two IMAP servers.

ReclaimAI - Helps users prioritize their work and personal calendars

isync (mbsync) - mbsync is a command line application which synchronizes mailboxes.

Superhuman - Superhuman is an email management tool.

MailStore - MailStore Home - A 100% free single-private-user desktop solution

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