Software Alternatives, Accelerators & Startups

Grasshopper VS ForthWrite

Compare Grasshopper VS ForthWrite and see what are their differences

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Grasshopper logo Grasshopper

Grasshopper enables entrepreneurs to build a virtual office that connects callers to employees, wherever they are.

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
  • Grasshopper Landing page
    Landing page //
    2022-11-06
  • 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.

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

Grasshopper features and specs

  • Professional Image
    Grasshopper helps small businesses project a more professional image with features like a dedicated business number, custom greetings, and voicemail transcription.
  • Portability
    The virtual phone system allows you to make and receive calls on your existing devices, so you can manage your business calls from anywhere.
  • Ease of Use
    Grasshopper is designed to be user-friendly with a straightforward setup process, making it accessible for businesses without technical expertise.
  • Scalability
    Grasshopper offers a variety of plans, allowing businesses to scale their communication needs as they grow.
  • Features
    Grasshopper includes a range of useful features such as call forwarding, business texting, voicemail transcription, and extensions, catering to various business needs.

Possible disadvantages of Grasshopper

  • Cost
    Grasshopper's pricing may be considered high for very small businesses or startups, especially when compared to other VoIP services.
  • Limited International Features
    The service's international call capabilities are limited, which might be a drawback for businesses with a global client base.
  • No Unified Communication Platform
    Grasshopper focuses solely on phone services and does not offer a unified communication platform that includes video conferencing or team messaging.
  • Call Quality
    Some users have reported occasional call quality issues, such as dropped calls or static, which can hamper business communications.
  • Lack of Integration
    Grasshopper does not offer many integrations with other business software, which could be a limitation for companies looking to streamline their operations.

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 Grasshopper

Overall verdict

  • Grasshopper is generally considered a good option for small businesses and entrepreneurs who need a cost-effective, easy-to-implement phone system. It offers a solid set of features that can streamline communications and help maintain a professional image. However, it may lack some advanced functionalities that larger enterprises require.

Why this product is good

  • Grasshopper is a virtual phone system designed for entrepreneurs and small businesses. It provides users with a professional phone number that can be used to manage calls through dedicated apps, without the need for a separate phone line or device. Features such as call forwarding, voicemail transcription, and business SMS make it a flexible and efficient tool for managing business communications.

Recommended for

  • Entrepreneurs and small business owners looking for a virtual phone system.
  • Freelancers who need a professional phone presence without using personal lines.
  • Businesses looking for a solution that is easy to set up and use without technical expertise.

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

Grasshopper videos

Grasshopper Phone System Review | ENTREPRENEURS NEED THIS

More videos:

  • Review - Grasshopper Phone System Review: Pricing, Complaints, Number Comparisons - RingCentral Phone.com
  • Review - 5 Reasons Grasshopper VOIP is NOT GOOD for Small Business

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Grasshopper and ForthWrite)
Communication
100 100%
0% 0
Email
0 0%
100% 100
VoIP
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Grasshopper 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 Grasshopper 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 Grasshopper and ForthWrite

Grasshopper Reviews

10 Best Business VoIP Phone Services for Small Businesses (2020)
GrassHopper is the best virtual phone system for small business owners. It comes with all the standard VOIP service features like call forwarding, voicemail, caller ID, etc. It enables you to make calls using a regular phone number. Their extensions can be used to make conference calls, which is great for inbound team meetings.
Source: www.isitwp.com
Difference between Grasshopper and MyOperator
*Grasshopper and its logo are registered trademarks of Grasshopper. MyOperator is not associated with Grasshopper in any way and its trademarks are only used here for comparative purposes.
Source: myoperator.co
Compare 5 Best Virtual Phone Number Providers for Your Businesses in 2018
Grasshopper is another virtual phone number service provider offers great pricing options and various facilities to their users. To start-up, youโ€™ve to pick a number of your choice for your business, record your custom greeting, add various departments and employees and Ta-dahโ€ฆ. Youโ€™ve done making your very own virtual phone number. Now you can get calls, voicemails, and...

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, Grasshopper seems to be more popular. It has been mentiond 5 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.

Grasshopper mentions (5)

  • Best alternative to personal cell phone for business use?
    Grasshopper works great. https://grasshopper.com/. Source: over 3 years ago
  • In their efforts to put every round from the clip into their foot, Blizzard will be recording voice chat in Overwatch 1.5(Also your account requires a phone number now)
    Get a burner number, there's services for that. Something like Grasshopper. Source: almost 4 years ago
  • Toll-Free Number
    I used grasshopper.com successfully. Not sure what the free tier is now. Source: about 4 years ago
  • Ringcentral cheaper alternative; sales team?
    Https://grasshopper.com/ has a lot of useful features that you may like. It's reasonably priced. Source: almost 5 years ago
  • Is there a way to make outgoing calls show up on caller id as business number?
    Yes, get service like Grasshopper, and she can install the app and call from her own extension of your business line. Https://grasshopper.com/. Source: about 5 years ago

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 Grasshopper and ForthWrite, you can also consider the following products

Dialpad - Switch is a cloud-based phone system built for Google Apps users.

ReclaimAI - Helps users prioritize their work and personal calendars

RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies

Superhuman - Superhuman is an email management tool.

Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

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