Software Alternatives, Accelerators & Startups

Greenshot VS ForthWrite

Compare Greenshot VS ForthWrite and see what are their differences

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Greenshot logo Greenshot

Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

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
  • Greenshot Landing page
    Landing page //
    2018-09-30
  • 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.

Greenshot

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

Greenshot features and specs

  • Open Source
    Greenshot is an open-source tool, meaning it is free to use and has a transparent development process. Users can view, modify, and distribute the source code.
  • Lightweight
    Greenshot has a small footprint and runs efficiently, making it suitable for use on older or less powerful systems without significantly impacting performance.
  • Customizable
    The tool offers various configuration options, allowing users to tailor the screenshot capture process and output to their specific needs.
  • Annotation Tool
    Greenshot includes built-in annotation tools, enabling users to edit, highlight, and add notes to their screenshots directly within the application.
  • Multiple Export Options
    Users can save screenshots in various formats or directly upload them to cloud services or share them via email, making it versatile for different use cases.

Possible disadvantages of Greenshot

  • Windows-Centric
    Greenshot primarily supports Windows. Users on macOS and Linux might find it less optimized or need to seek alternative solutions.
  • Learning Curve
    Although versatile, the extensive features and customization options might present a learning curve for new users, particularly those unfamiliar with screenshot tools.
  • Limited Advanced Editing
    While Greenshot offers annotation tools, it lacks advanced image editing capabilities found in more comprehensive graphic design software.
  • Occasional Bugs
    As with many open-source projects, users may encounter occasional bugs or stability issues, requiring community support or patience for fixes.
  • No Video Capture
    Greenshot is designed exclusively for capturing static screenshots and does not support video or GIF recording, unlike some of its competitors.

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 Greenshot

Overall verdict

  • Overall, Greenshot is a recommended screenshot tool due to its comprehensive features that cater to both basic and advanced screenshot needs while being resource-efficient.

Why this product is good

  • Greenshot is considered a good tool by many users due to its simplicity, ease of use, and powerful features that are highly beneficial for creating and editing screenshots. It offers various annotation tools, multiple output options, and integration with other services which enhance productivity and documentation processes.

Recommended for

  • Students who need to include annotated screenshots in their reports or presentations.
  • Office workers who frequently share screen captures in emails or documents.
  • Software developers and testers who require detailed screenshots for bug reporting and documentation.
  • Anyone looking for an easy-to-use, free, and reliable screenshot tool.

Greenshot videos

My Greenshot Review 2017

More videos:

  • Tutorial - Complete Greenshot Tutorial for Beginners | Best Screen Capture Tool for Windows 10
  • Review - Greenshot Screenshot App Review

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Greenshot and ForthWrite)
Screenshot Annotation
100 100%
0% 0
Writing Tools
0 0%
100% 100
Screenshots
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Greenshot 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 Greenshot 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 Greenshot and ForthWrite

Greenshot Reviews

Top 13 Free Snagit Alternatives For 2021
Greenshot is a free and open source screen-capture tool that can serve as a Snagit free alternative for Windows 7. It is quite unfortunate that Greenshot is only compatible with Windows, but hey, itโ€™s free, so we canโ€™t judge.
Source: screenrec.com
15 Best Snagit Alternatives in 2020
Greenshot is an open source screen capture tool. This tool allows you to quickly capture screenshots of a selected region, window, or entire screen. It also helps you to capture scrolling web pages from the Internet Explorer and other browsers.
Source: www.guru99.com
30 Best Free Screen Capture Tools and Plugins
Greenshot can capture any region on the screen or a web page and present the options to annotate or highlight parts of the shot. Interestingly, it provides an option to save the file or upload it to Flickr or Picasa. But it runs only on Windows PC.

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, Greenshot seems to be more popular. It has been mentiond 117 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.

Greenshot mentions (117)

  • Flameshot โ€“ Powerful, yet simple to use open-source screenshot software
    For the last 10(ish) years I've been using Greenshot [1]. I haven't found any issues with it but it is only available on Windows and Mac. [1] https://getgreenshot.org/. - Source: Hacker News / about 2 years ago
  • Help removing ads on https://getgreenshot.org/
    Just looking for filters to remove ad space on https://getgreenshot.org/. There is a space at the top on one on the right side. Thanks! Source: over 2 years ago
  • How to get rid of the dialog box after print screen ?
    This is a program installed called Greenshot. It's a utility used for taking screenshots. If you want it to go away, you can uninstall greenshot. Source: over 2 years ago
  • This guy just dropped the BEST MOD of the month and yall dont talk abt it ????
    Here's a useful free software for that https://getgreenshot.org/. Source: almost 3 years ago
  • I opened Start and I searched for Snipping Tool to capture this!
    I had to install Greenshot once for a class and now I use it for all of my screenshots. 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 Greenshot and ForthWrite, you can also consider the following products

ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...

Superhuman - Superhuman is an email management tool.

LightShot - The fastest way to take a customizable screenshot.

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.

Snagit - Screen Capture Software for Windows and Mac

Lavender - Realtime coaching for sales emails.