Software Alternatives, Accelerators & Startups

Swiftkey VS ForthWrite

Compare Swiftkey VS ForthWrite and see what are their differences

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Swiftkey logo Swiftkey

SwiftKey keyboard allows for seamless typing and adapts to the way you type, so you can spend less time correcting typos and more time saying what you mean.

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
  • Swiftkey Landing page
    Landing page //
    2021-10-15
  • 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.

Swiftkey

Pricing URL
-
$ 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

Swiftkey features and specs

  • Predictive Text
    SwiftKey's predictive text uses AI to learn from your typing habits and offers accurate next-word suggestions, making typing faster and more efficient.
  • Customization
    The keyboard offers various customization options such as themes, layout changes, and personalized predictions, allowing users to tailor their typing experience to their preferences.
  • Multilingual Support
    SwiftKey supports a wide range of languages, making it easy to switch between different languages and adapt to multilingual users' needs.
  • Gesture Typing
    Users can use swipe gestures to type words, which can significantly speed up typing and reduce the effort involved.
  • Cloud Sync
    With cloud sync, your keyboard settings and learned words can be backed up and synchronized across multiple devices, ensuring a consistent experience.

Possible disadvantages of Swiftkey

  • Privacy Concerns
    Since SwiftKey collects data to improve predictions, some users might have concerns about their personal data being stored and used.
  • Resource Intensive
    The keyboard can be heavy on device resources, potentially slowing down performance on older or lower-spec devices.
  • Occasional Lag
    Users have reported occasional lag or delays, especially when using some of the more resource-intensive features like cloud sync and advanced predictions.
  • Over-reliance on AI
    While the AI is generally accurate, it can sometimes make incorrect predictions or autocorrections, which can be frustrating and require manual correction.
  • Limited Offline Features
    Certain features, such as cloud backup and updates to predictions, require an internet connection, limiting functionality when offline.

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 Swiftkey

Overall verdict

  • Overall, SwiftKey is a reliable and efficient keyboard app, especially beneficial for those who frequently type on mobile devices. While some alternatives exist, SwiftKey's unique features and Microsoft backing make it a strong contender in the keyboard app market.

Why this product is good

  • SwiftKey, developed by Microsoft, is considered a good keyboard app due to its advanced predictive text capabilities, customizable keyboard themes, and seamless integration with various languages. It uses AI to learn your writing style, offering personalized suggestions to speed up typing. Additionally, its cloud-based features allow users to sync their style and preferences across multiple devices.

Recommended for

    SwiftKey is ideal for users who are looking for an intelligent keyboard that can adapt to their typing patterns, offer multi-language support, and provide extensive customization options. It's also recommended for individuals who type extensively on their mobile devices and appreciate efficiency and predictive text functionalities.

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

Swiftkey videos

SwiftKey vs Gboard | Which is Best Keyboard App for You | Guiding Tech

More videos:

  • Review - Windows 10 Mobile Review
  • Tutorial - BBC micro:bit Review and makecode Programming Tutorial
  • Review - Swiftkey Keyboard | Worth The Switch?
  • Review - Beginners Review: Microsoft MakeCode Arcade || Lilithium
  • Review - Swiftkey: Best keyboard App? 10 reasons why

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Swiftkey and ForthWrite)
iPhone
100 100%
0% 0
Email
0 0%
100% 100
Tool
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Swiftkey 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 Swiftkey and ForthWrite

Swiftkey Reviews

We have no reviews of Swiftkey 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)

Social recommendations and mentions

Based on our record, Swiftkey seems to be more popular. It has been mentiond 2 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.

Swiftkey mentions (2)

  • Show HN: Email.md โ€“ Markdown to responsive, email-safe HTML
    Every MUA I've used allows the reader to set a font size, so changing font sizes is 100% a feature of plain-text emails. Then they get the link the size they need to read it correctly and it's absolutely easy to read. This here comment is pain text. Is it hard to read this link: http://microsoft.com/ I don't think so. I certainly didn't have to resort to HTML to make that link readable and clickable. - Source: Hacker News / 4 months ago
  • Skills Required for Building AI Agents in 2026
    Microsoft Azure SRE Case Study โ€” Production experience scaling from 50+ sub-Agents to 5 core tools. microsoft.com. - Source: dev.to / 5 months 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 Swiftkey and ForthWrite, you can also consider the following products

Fleksy - Fleksy is the #1 private, white-label virtual keyboard SDK, enabling companies to create unimaginable products.

ReclaimAI - Helps users prioritize their work and personal calendars

Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?

Superhuman - Superhuman is an email management tool.

Keyboard for Phone X - Keyboard for Phone X is a free to use application that allows you to enjoy Phone X like chatting experience and bring your phone a new look.

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