ForthWrite
Superhuman
Gemini
Lavender
Mailmeteor
Spark Mail
TryHerd.app
Fairing.co
Zigpoll
Grapevine Surveys
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
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.
Most store owners miss the feedback that matters because there is too much noise and not enough time. Herd places a simple star rating widget on your Shopify thank-you page after every purchase. Customers rate in 15 seconds. Every Monday you get a plain-English AI summary of what customers loved, what frustrated them, and one thing to fix. Get instant alerts for low ratings before they become public reviews. Install once. Herd runs quietly from there.
Post-purchase feedback widget on your thank-you page, no code needed Monday AI digest inside your Shopify dashboard every week Instant email alert when a customer leaves a 1 or 2 star rating AI picks your best testimonial each week, ready to embed on your store Free plan with up to 50 responses per month, no credit card needed
ForthWrite TryHerd.appForthWrite's answer
Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API
TryHerd.app's answer:
Remix, Shopify App Remix, Supabase, Anthropic Claude API, Render, and Resend.
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.
TryHerd.app's answer:
Every other post-purchase app hands you a dashboard. Herd reads every response and emails you a plain-English summary each Monday, what customers loved, what frustrated them, one thing to fix. No charts, no exporting.
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.
TryHerd.app's answer:
Most competitors focus on marketing attribution and charge $39-299/month. Herd focuses on the checkout experience, starts free, and never requires you to log in, the Monday digest comes to you.
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.
TryHerd.app's answer:
Small to mid-sized Shopify merchants, often solo founders, in apparel, skincare, home goods, and handmade products who care about customer experience but don't have time for a survey dashboard.
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.
TryHerd.app's answer:
Most merchants only learn something went wrong after a bad review. Herd puts a 15-second widget on the thank-you page and has AI read every response, so merchants hear about problems before customers go public.
TryHerd.app's answer:
Herd is newly launched and onboarding its first merchants.
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.
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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.
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Grapevine Surveys - Grapevine is an online survey tool for employee surveys.