Software Alternatives, Accelerators & Startups

KAYAK VS ForthWrite

Compare KAYAK VS ForthWrite and see what are their differences

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KAYAK logo KAYAK

KAYAK is a travel search engine that searches hundreds of other travel sites at once. Our helpful tools & features find you the information you need to make the right decisions on flights, hotels, rental cars and vacation packages.

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
  • KAYAK Landing page
    Landing page //
    2023-09-15
  • 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.

KAYAK

Website
kayak.com
$ 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

KAYAK features and specs

  • User-Friendly Interface
    KAYAK provides a simple, intuitive, and visually appealing interface that makes it easy for users to search and compare travel options.
  • Comprehensive Search Engine
    KAYAK aggregates information from a wide range of travel websites, offering users a broad selection of flights, hotels, car rentals, and vacation packages.
  • Price Alerts
    Users can set up price alerts for flights and hotels, allowing them to get notified when prices drop, which helps in securing the best deals.
  • Travel Tools
    KAYAK offers additional tools like a trip organizer, currency converter, and travel guides, which can enhance the travel planning experience.
  • Mobile App
    KAYAK has a robust mobile app that mirrors the functionality of the website, providing users with the convenience to plan and manage their travel on-the-go.

Possible disadvantages of KAYAK

  • Additional Fees
    Sometimes the prices shown on KAYAK do not include additional fees that may be charged by the airline or hotel during the booking process, potentially leading to unexpected costs.
  • Sponsored Results
    Sponsored listings may appear in search results, which can sometimes prioritize advertisers over displaying the absolute best deals for users.
  • Lack of Post-Booking Support
    Since KAYAK acts as an aggregator and not a direct booking platform, post-booking customer support is handled by the service provider, which can result in fragmented support experiences.
  • Inconsistent Information
    There can be inconsistencies between the information shown on KAYAK and the actual information on the booking provider's website, such as room availability or additional amenities.
  • Account Integration
    While KAYAK offers integration with some loyalty programs, it may not support all frequent flyer or hotel loyalty accounts, limiting benefits for some frequent travelers.

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 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

KAYAK videos

5 Kayaks Under $300 Reviewed: Are They Worth It?

More videos:

  • Review - What is the best hotel booking site!? | Expedia vs. Hotels.com vs. Booking.com
  • Review - Watch Out for This Hotel Booking Scam
  • Review - Buying FIRST KAYAK on a WALMART budget!!!! on the WATER REVIEW
  • Review - BEST Bass Fishing Kayak - (Kayak REVIEW) NuCanoe Pursuit
  • Review - Best Fishing Kayaks 2024 - (Which One Is The Best?)
  • Review - $399 VS $649 What's The Difference? Budget Kayak Comparison
  • Review - BEST KAYAKS: 10 Kayaks (2023 Buying Guide)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to KAYAK and ForthWrite)
Travel
100 100%
0% 0
Writing Tools
0 0%
100% 100
Vacation Rental
100 100%
0% 0
Email
0 0%
100% 100

Questions & Answers

As answered by people managing KAYAK 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 KAYAK and ForthWrite. For example, how are they different and which one is better?
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Reviews

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

KAYAK Reviews

8 Best Alternatives to Google Travel Trip Summaries
Again, Kayak Tripsโ€™ main function is as a travel itinerary and organization system. Users can create itineraries for any location and time period, from weekend getaways to extended vacations. Kayak Trips doesnโ€™t provide activity suggestions, so itโ€™s purely a functional travel itinerary creator instead of also providing travel and activity inspiration. However, you can search...
Source: wanderlog.com
The 17 Best Websites for Booking Hotels at the Cheapest Prices [2024]
Kayakโ€™s map feature can offer lots of information about your destination city, including where the cheapest hotels are located. Image Credit: Kayak
The Best Travel Apps for 2025
Kayak is another all-in-one travel search site, though it doesn't let you book anything directly. Instead, Kayak sends you off to other places where you finalize your travel deals, whether that's another aggregator, an airline, or a rental car agency. Kayak covers hotel stays, rental cars, train and bus tickets, and travel experiences. It has some handy tools for exploring...
Source: www.pcmag.com
Top 30 Booking.com Competitors (Updated in 2023)
Kayak is a travel search engine that enables users to search for and compare prices from different travel websites for flights, hotels, rental cars, and more. With its comprehensive search results and user-friendly interface, Kayak assists travelers in finding the best deals and making informed booking decisions.
Best and Worst Hotel Booking Sites for 2024
HotelsCombined was also one of only three sites, along with Kayak and Momondo, that never once returned a price or hotel count that ranked below average. Even our top two sites stumbled a few times on those metrics. Whatโ€™s more, HotelsCombined has, hands-down, our favorite set of filters, which all come in the form of checkboxes, sliders, or fill-in text boxes, not radio...

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, KAYAK seems to be more popular. It has been mentiond 79 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.

KAYAK mentions (79)

  • Ticket situation for the XFL Championship, a week out.
    Check momondo.com, kayak.com or trivago. They usually have a large amount of discount flight information. Source: about 3 years ago
  • Sleeping in my truck on base for 5 days, anyone got tips?
    Try some of the apps like kayak.com and expedia. I've seen hotels for about $29 on there. Some motels even do a weekly rate of something like $100 for the entire 7 days. Source: about 3 years ago
  • Car rental austria nearby salzburgh south bus station
    Have you tried sixt.com or kayak.com? Source: over 3 years ago
  • Going to both citi shows, where to stay?
    Check kayak.com for rooms and rentals. Uber or Lyft if you're too far to walk. Source: over 3 years ago
  • Tips for a 24F solo trip to LA for the first time (specifically flight/itinerary) in a little over a month??
    Depending on where you end up staying, consider flying to Burbank (BUR). airport. Its vastly smaller than LAX, so quicker to get in and out of, shorter lines at security, etc. And its closer than LAX to places like Hollywood. If CT means New York metro area, you can get nonstop to Burbank on JetBlue from JFK. Otherwise likely looking at at least one stop, but I imagine there's no non-stops to LAX either unless... Source: over 3 years ago
View more

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 KAYAK and ForthWrite, you can also consider the following products

Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.

Superhuman - Superhuman is an email management tool.

Expedia - Save up to 60% with Expedia Mobile Exclusive hotel deals!

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.

Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.

Lavender - Realtime coaching for sales emails.