Software Alternatives, Accelerators & Startups

Mailshake VS ForthWrite

Compare Mailshake VS ForthWrite and see what are their differences

Mailshake logo Mailshake

Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.

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
  • Mailshake Landing page
    Landing page //
    2023-02-09
  • 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.

Mailshake

$ Details
-
Platforms
-
Release Date
-
Startup details
Country
United States

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

Mailshake features and specs

  • User-Friendly Interface
    Mailshake has a clean and intuitive interface that makes it easy for users to navigate and set up email campaigns quickly.
  • Automated Follow-ups
    The platform allows for automated follow-up emails, which helps increase engagement and response rates without manual intervention.
  • Personalization
    Mailshake provides options for personalization tags in emails, enabling users to create more customized and relevant messages.
  • Integrations
    Mailshake integrates with a variety of other tools such as CRMs and email providers, allowing for seamless workflow automation.
  • Real-time Analytics
    Offers comprehensive analytics on email campaign performance, including open rates, click rates, and response rates.

Possible disadvantages of Mailshake

  • Limited Customization
    Some users may find that the platformโ€™s customization options for email templates and sequences are limited.
  • Pricing
    Mailshake's pricing may be on the higher side for small businesses or individual users with limited budgets.
  • Learning Curve
    Although the interface is user-friendly, there can be a learning curve for users who are entirely new to email marketing platforms.
  • Limited Advanced Features
    Compared to some other email marketing platforms, Mailshake may lack certain advanced features like advanced segmentation or A/B testing options.
  • Email Deliverability
    Some users have reported issues with email deliverability, which can affect the overall success of email campaigns.

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 Mailshake

Overall verdict

  • Mailshake is a strong choice for those seeking an efficient and effective tool for email outreach campaigns. Its combination of automation, personalization, and ease of use makes it a valuable asset for marketing and sales professionals.

Why this product is good

  • Mailshake is considered a good email outreach tool because it offers user-friendly features for cold emailing, automated follow-ups, and email personalization. It integrates well with various CRM systems and ensures high email deliverability rates. The platform also provides detailed analytics to help users optimize their campaigns.

Recommended for

  • Sales teams looking to automate their outreach process.
  • Marketers aiming to improve their email campaign effectiveness.
  • Businesses wanting to maintain and improve email deliverability and engagement rates.
  • Small to mid-sized companies looking for an affordable, scalable solution for email marketing.

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

Mailshake videos

Mailshake Review and Tutorial: l: How To Massively Speed Up Your Outreach Process

More videos:

  • Review - Mailshake Review - Is This Outreach Tool Any Good? (~1 year use)
  • Tutorial - Mailshake Review - How to set up cold email campaign (step-by-step)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Mailshake and ForthWrite)
Email Marketing
100 100%
0% 0
Writing Tools
0 0%
100% 100
Sales
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Mailshake 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 Mailshake and ForthWrite. For example, how are they different and which one is better?
Log in or Post with

Reviews

These are some of the external sources and on-site user reviews we've used to compare Mailshake and ForthWrite

Mailshake Reviews

Top 10 Lead Generation and Engagement Tools
Mailshake focuses on cold email outreach and lead nurturing, offering easy-to-use templates and automation to streamline the entire process.
Source: rainex.io
The 24 Best Email Marketing Tools
A sales-focused online tool that integrates email with phone calls and social media. Mailshake enables sales reps to send personalized, high-volume cold email; engage with prospects via phone and social media; and set up automated outreach sequences (just make sure you have clean data and the ability to quickly take recipients out of the sequence if needed). Unlike standard...
Source: webbiquity.com
The Best Email Marketing, Sales Prospecting, and Email Automation Software
Mailshake integrates with Gmail and other Google apps to help reach more people. The software creates customized emails that appear like a normal email from a Gmail address. It allows for mail automation thanks to its various templates that give one the capability of creating email campaigns that are effective.

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, Mailshake 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.

Mailshake mentions (5)

  • Complete Cold Emailing Guide - eCommerce Version
    When it comes to selecting a client for sending your emails, there are countless options to choose from. We're not affiliated with any specific one, but we've found QuickMail to be effective for maximizing deliverability. While the user interface could be improved, it gets the job done and we haven't found a compelling reason to switch. Other popular alternatives include Instantly, Lemlist, MailShake, and many... Source: over 3 years ago
  • Where to find cool react native jobs
    Create an account on mailshake.com > create a simple automated email funnel of 2 emails, one that sends 7 days after the first one. Source: almost 4 years ago
  • cold b2b emails
    Lemlist to send emails or Mailshake as another good option. I prefer Lemlist as IMO has a better UI and includes warming-up service. Source: over 4 years ago
  • 30 interviews at companies like Microsoft and Stripe in 1 month. Here's how.
    Do outreach and follow ups at scale. If you do this right and follow up well, your reply rates sky rocket. For my own job search, I used an email automation tool from Hunter but Mailshake and other tools work too. Source: over 4 years ago
  • My 'under 700ms' SaaS - How I plan to automate the entire process, from finding leads to the sale itself - broken down for you to replicate ๐Ÿ˜„
    For this, I'm currently using MailShake: https://mailshake.com/. Source: over 4 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 Mailshake and ForthWrite, you can also consider the following products

lemlist - The prospecting tool to automate multichannel outreach & actually get replies.

Superhuman - Superhuman is an email management tool.

Reply.io - Reply.io is an AI-driven sales engagement platform that automates cold outreach through unlimited mailboxes, converts website traffic into booked meetings with AI Chat, and empowers your team to streamline the entire sales process with AI SDRs.

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.

Instantly.ai - Build your own infinitely scalable cold email outreach system with Instantly.

Lavender - Realtime coaching for sales emails.