Software Alternatives, Accelerators & Startups

Doorbell.io VS ForthWrite

Compare Doorbell.io VS ForthWrite and see what are their differences

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Doorbell.io logo Doorbell.io

Collect in-app user feedback. Available on websites, iOS, and Android.

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
  • Doorbell.io Landing page
    Landing page //
    2023-09-02
  • 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.

Doorbell.io

$ Details
freemium $29.0 / Monthly
Platforms
Browser iOS Android
Release Date
2013 August

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

Doorbell.io features and specs

  • User Feedback Collection
    Doorbell.io allows for easy collection of feedback from users directly on your website or app. This can help in identifying problems and improving user experience.
  • Customization
    It offers various customization options for feedback forms, allowing businesses to tailor the feedback process to their specific needs and branding.
  • Integrations
    Doorbell.io integrates with numerous third-party services like Slack, Trello, and Jira, making it convenient to manage and act upon user feedback within existing workflows.
  • Ease of Implementation
    The platform is easy to implement, with just a few lines of code required to start collecting feedback.
  • Real-time Notifications
    Users can receive real-time notifications of new feedback, ensuring timely responses and immediate action where necessary.
  • Multi-Platform Support
    Supports feedback collection from multiple platforms including web, iOS, and Android.

Possible disadvantages of Doorbell.io

  • Cost
    While Doorbell.io offers a free tier, advanced features require a subscription, which might be costly for small businesses or startups.
  • Learning Curve
    For users not familiar with feedback management tools, there can be a slight learning curve in understanding and fully utilizing all features.
  • Customization Limits
    Though customizable, some users might find certain limitations in template designs and the ability to modify feedback forms completely to their liking.
  • Dependence on Third-Party Integrations
    Some functionalities rely heavily on third-party service integrations, which means additional setup and potential dependency issues.
  • Data Privacy Concerns
    Collecting user feedback involves handling potentially sensitive information, and businesses must ensure they comply with data privacy laws and maintain user trust.

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 Doorbell.io

Overall verdict

  • Overall, Doorbell.io is considered a good choice for businesses seeking a straightforward and effective customer feedback solution. It stands out due to its user-friendly interface and robust feature set.

Why this product is good

  • Doorbell.io is a feedback management tool that helps businesses collect and analyze customer feedback efficiently. It is praised for its ease of use, customizable options, and integration capabilities with various platforms, making it valuable for improving customer satisfaction and service quality.

Recommended for

    Doorbell.io is recommended for small to medium-sized businesses that aim to improve their customer engagement and feedback loops. It's especially beneficial for teams that require seamless integration with existing tools like Slack, Trello, and Jira for a streamlined workflow.

Category Popularity

0-100% (relative to Doorbell.io and ForthWrite)
Customer Feedback
100 100%
0% 0
Writing Tools
0 0%
100% 100
Business & Commerce
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Doorbell.io 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

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Reviews

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

Doorbell.io Reviews

We have no reviews of Doorbell.io 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)

What are some alternatives?

When comparing Doorbell.io and ForthWrite, you can also consider the following products

Upvoty - User feedback in 1 simple overview ๐Ÿ”ฅ

Superhuman - Superhuman is an email management tool.

Nolt.io - A fast & beautiful way to collect user feedback

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.

Canny.io - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.

Lavender - Realtime coaching for sales emails.