Software Alternatives, Accelerators & Startups

Voiceflow VS ForthWrite

Compare Voiceflow VS ForthWrite and see what are their differences

Voiceflow logo Voiceflow

Build voice apps in your browser without coding

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
  • Voiceflow Landing page
    Landing page //
    2023-07-27
  • 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.

Voiceflow

$ 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

Voiceflow features and specs

  • User-Friendly Interface
    Voiceflow offers a visually intuitive drag-and-drop editor, making it easy for users to design and prototype voice applications without needing extensive coding knowledge.
  • Cross-Platform Support
    Voiceflow supports multiple voice platforms including Amazon Alexa and Google Assistant, allowing creators to build applications that work across different devices and ecosystems.
  • Collaborative Environment
    The platform includes collaboration tools that enable multiple team members to work on a project simultaneously, improving workflow efficiency and teamwork.
  • Extensive Documentation and Tutorials
    Voiceflow provides a wealth of resources, including tutorials, guides, and documentation, to help users get up to speed quickly and troubleshoot issues.
  • Integration Capabilities
    Voiceflow offers integrations with various third-party services and APIs, allowing for more complex and feature-rich voice applications.

Possible disadvantages of Voiceflow

  • Cost
    Voiceflow's advanced features and capabilities may come at a higher cost, which could be a barrier for smaller businesses or hobbyist developers.
  • Steep Learning Curve for Complex Projects
    While the basic interface is user-friendly, creating more complex voice applications can require a significant amount of time and effort to learn.
  • Platform Dependency
    Relying on a third-party platform like Voiceflow means users are dependent on the platform's continued support and updates, which can be a risk if the service changes or discontinues.
  • Limited Customization
    For highly customized or unique voice applications, users may find Voiceflow's pre-built components and templates restrictive, requiring custom development work outside the platform.
  • Data Privacy Concerns
    As with any third-party service, there are potential data privacy and security concerns, especially when dealing with sensitive user data through voice interactions.

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 Voiceflow

Overall verdict

  • Voiceflow is a robust choice for those looking to create interactive voice and chat applications efficiently. Its comprehensive features, ease of use, and multi-platform support make it a valuable tool for both beginners and seasoned developers.

Why this product is good

  • Voiceflow is considered good because it offers a user-friendly platform for designing and prototyping voice and chat applications without requiring extensive coding knowledge. Its drag-and-drop interface makes it accessible for both experienced developers and non-developers. The platform supports multiple voice assistants, including Amazon Alexa and Google Assistant, making it versatile for different projects. Additionally, Voiceflow provides collaborative features that facilitate teamwork, real-time editing, and sharing of projects with stakeholders.

Recommended for

    Voiceflow is particularly recommended for product managers, UX designers, developers, educators, and enterprises that aim to innovate within the voice and chat app space. It's suitable for those who want to create engaging conversational experiences without the overhead of complex programming.

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

Voiceflow videos

Intro to Voiceflow - Ep. #3 | Uploading and testing on our Alexa device

More videos:

  • Review - Voiceflow Features | Real-time collaboration

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Voiceflow and ForthWrite)
AI
100 100%
0% 0
Email
0 0%
100% 100
Chatbots
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Voiceflow 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 Voiceflow and ForthWrite

Voiceflow Reviews

Top 10 AI Voice Agent Development Companies [2026]
Voiceflow is delivered as cloud SaaS connecting to telephony carriers for call deployment. This voice app development company is also well-known for its visual drag-and-drop editor, version control, templates, and integrations with Google Dialogflow or custom LLMs.
10 Best Custom AI Voice Agents for 2026: My Hands-On Review
Voiceflow is the best choice for teams that need full control over their voice experience, while offering unified visual and code-based design.
21 Best No Code Tools You Need To Try
If you wish to have voice applications for your application, you need to try out Voiceflow. Voiceflow allows you to develop voice apps for Amazon Alexa and Google Assistant, which then makes them available to everyone.
Source: www.cenario.co
33+ Best No Code Tools you will love ๐Ÿ˜
Here's why you should consider Voiceflow if you're wanting to build a voice app; - Good UX with the interface. If you've built chatbots before, you should pick this up quickly- Great YouTube channel of video tutorials to accelerate users' learning- Affordable pricing
25 No-Code Apps and Tools to help build your next Startup
Voice-activated tech is powering the IoT revolution. Siri and Alexa are some of the most popular tech to come out of the last decade. Voice apps for Google Assistant and Amazonโ€™s Alexa are a huge and growing market. Voiceflow allows designers to build incredible applications for the Google Assistant and Amazon Alexa without ever needing to write a line of code. Their...
Source: www.ishir.com

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, Voiceflow seems to be more popular. It has been mentiond 1 time 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.

Voiceflow mentions (1)

  • DAN prompts don't work on Voiceflow.com
    Voiceflow.com is a site where you can tweak and build your own AI assistant with a visual interface that uses ChatGPT as the muscle. I've been trying to use it to experiment with the boundaries of ChatGPT's programming such as using DAN prompts like what /u/thechatgptkingha224 has created. I'd like to do it there because there's a lot of customizability in how it responds. However although there is often limited... Source: over 3 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 Voiceflow and ForthWrite, you can also consider the following products

Vapi - Voice AI Infrastructure for the Internet

ReclaimAI - Helps users prioritize their work and personal calendars

Retell AI - API that enables developers to build human-like voice agents

Superhuman - Superhuman is an email management tool.

Bland AI - An AI Phone Calling API

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