Software Alternatives, Accelerators & Startups

Google Antigravity VS ForthWrite

Compare Google Antigravity VS ForthWrite and see what are their differences

Google Antigravity logo Google Antigravity

Google Antigravity - Build the new way

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.
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  • Google Antigravity Landing page
    Landing page //
    2025-11-18
  • 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.

Google Antigravity

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

Google Antigravity features and specs

  • Innovative Technology
    Google Antigravity introduces groundbreaking technology that potentially revolutionizes the way we understand physics and gravity.
  • Increased Mobility
    If successful, antigravity technology could allow for unprecedented levels of mobility, enabling new forms of transportation and logistics.
  • Environmental Benefits
    By potentially reducing the need for traditional fossil fuel-based transportation, antigravity technology could have significant positive impacts on the environment.
  • Economic Opportunities
    This technology could create new industries and job opportunities, fostering economic growth and development.

Possible disadvantages of Google Antigravity

  • High Cost
    The development and implementation of antigravity technology are likely to require significant investment, making it expensive and potentially inaccessible to many.
  • Technological Challenges
    Antigravity involves complex scientific principles that may present formidable technological challenges and limit its feasibility.
  • Ethical Concerns
    The introduction of antigravity technology may raise ethical questions, such as its impact on society and potential misuse in military applications.
  • Regulatory Hurdles
    Bringing antigravity technology to market would require navigating numerous regulatory environments, which could delay its deployment.

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 Google Antigravity

Overall verdict

  • Google Antigravity is a promising agent-first development platform that reimagines the coding workflow around autonomous AI agents, making it a strong choice for developers who want to leverage Google's Gemini models in an IDE built for the agentic era.

Why this product is good

  • Built around an agent-centric approach, allowing AI agents to autonomously plan, execute, and validate coding tasks across the editor, terminal, and browser
  • Powered by Google's advanced Gemini models, offering strong reasoning and code generation capabilities
  • Provides a mission-control style interface where developers can orchestrate and monitor multiple agents working in parallel
  • Agents can produce verifiable artifacts like task lists, screenshots, and browser recordings to build trust in their output
  • Free to use during its public preview period, lowering the barrier to entry for experimentation

Recommended for

  • Developers who want to embrace agentic, AI-driven coding workflows
  • Teams already invested in Google's Gemini and AI ecosystem
  • Engineers looking to automate repetitive coding, testing, and browser-based tasks
  • Early adopters interested in exploring the future of AI-assisted software development
  • Individuals wanting to experiment with autonomous agents at no cost during the preview

Google Antigravity videos

I Tried Google Antigravity So You Don't Have To!

More videos:

  • Review - Is Google Antigravity Better Than Cursor 2.0?

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Google Antigravity and ForthWrite)
Developer Tools
100 100%
0% 0
Writing Tools
0 0%
100% 100
AI
96 96%
4% 4
Email
0 0%
100% 100

Questions & Answers

As answered by people managing Google Antigravity 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 Google Antigravity 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 Google Antigravity and ForthWrite

Google Antigravity Reviews

We have no reviews of Google Antigravity 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, Google Antigravity seems to be more popular. It has been mentiond 34 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.

Google Antigravity mentions (34)

  • How to Get Your First Tool Online
    The step up from there is an editor with a built-in agent like Cursor, Google Antigravity, Windsurf, or VS Code with a coding extension. These are code editors with an AI agent living inside them, and the difference is the responsible party for getting things from place to place. Instead of the software creator shuttling code between windows, the AI agent edits the project files directly and runs the GitHub and... - Source: dev.to / 13 days ago
  • Surviving the Antigravity 2.0 Update: How Google Broke My Workflow (And How to Fix It)
    If you were similarly flashbanged by the Antigravity 2.0 update, here is a complete breakdown of what Google changed, the data behind the new features, why it broke our setups, and the exact steps I used to repair my workspace. - Source: dev.to / 19 days ago
  • Agent Factory Recap: Building with Gemini 3, AI Studio, Antigravity, and Nano Banana
    Welcome back to The Agent Factory! This week, we went beyond the hype to dissect the technical details of Google's massive wave of AI releases. We were joined by Paige Bailey, the UTL for Developer Relations at DeepMind, to break down everything from the new Gemini 3 model to the Antigravity IDE. - Source: dev.to / 4 months ago
  • The Dead Economy Theory
    I thought most people used Antigravity to code with Gemini? https://antigravity.google/. - Source: Hacker News / about 1 month ago
  • Tools I'm Using in 2026 (and what I've stopped using from 2025)
    Two interesting ones I've been playing with, JetBrains Air and Google Antigravity. Google recently used Antigravity 2.0 to build a custom OS and run Doom during their I/O 2026 keynote, so I'm really interested to see where this goes. Will report back after a few months. - Source: dev.to / about 1 month 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 Google Antigravity and ForthWrite, you can also consider the following products

Cursor - The AI-first Code Editor. Build software faster in an editor designed for pair-programming with AI.

Superhuman - Superhuman is an email management tool.

Claude Code - Transform hours of debugging into seconds with a single command. Experience coding at thought-speed with Claude's AI that understands your entire codebaseโ€”no more context switching, just breakthrough results.

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.

warp by spolu - Secure and simple terminal sharing

Lavender - Realtime coaching for sales emails.