Software Alternatives, Accelerators & Startups

Diep.io VS ForthWrite

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

Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Diep.io logo Diep.io

Diep.io is a multiplayer action game available for web browsers, Android, and iOS, created by Brazilian developer Matheus Valadares. Players control tanks and earn points by destroying shapes and killing other players in a 2D arena.

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.
  • Diep.io Landing page
    Landing page //
    2022-06-25
  • 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.

Diep.io

Website
diep.io
Pricing URL
-
$ Details
-
Platforms
-
Release Date
-

ForthWrite

$ Details
freemium $12 / 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

Diep.io features and specs

  • Engaging Gameplay
    Diep.io offers simple yet addictive gameplay that keeps players coming back for more, with various tanks and upgrades increasing replayability.
  • Multiplayer Interaction
    Players can compete against others in real-time, providing a dynamic and competitive environment that enhances the gaming experience.
  • Free to Play
    The game is free to play, making it accessible to a wide audience without any upfront cost.
  • Browser-Based
    As a browser-based game, it requires no downloads or installations, making it easy to play on almost any computer with an internet connection.
  • Variety of Classes
    Diep.io features a variety of tank classes and upgrade paths, which allows players to customize their gameplay styles and strategies.

Possible disadvantages of Diep.io

  • Repetitive Gameplay
    While the game is engaging, the core mechanics can become repetitive over time, which may reduce long-term player retention.
  • Steep Learning Curve
    New players may find the game challenging to master due to the complexity of upgrade paths and the competitive nature of gameplay.
  • Server Lag
    Players may experience lag or connectivity issues, especially during peak times, which can impact gameplay quality.
  • Minimal Graphics
    The game's graphics are quite basic, which might not appeal to players looking for a visually rich gaming experience.
  • Monetization
    Though the game is free to play, it includes in-app purchases that can give paying players an advantage, potentially leading to a pay-to-win scenario.

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 Diep.io

Overall verdict

  • Yes, Diep.io is generally considered a good game for those who enjoy fast-paced, skill-based online multiplayer experiences. Its engaging gameplay and competitive aspects attract a dedicated player base.

Why this product is good

  • Diep.io is a popular online multiplayer game that offers a mix of strategy, skill, and quick decision-making. Players control tanks and must navigate through a 2D arena, destroying shapes and other players to gain experience and upgrades. It combines elements of classic tank games with modern online multiplayer features. The game's simple graphics and mechanics make it easy to pick up, while its competitive nature and depth offer a challenge for those looking to master it.

Recommended for

    Diep.io is recommended for players who enjoy online competitive games, particularly those who like games with strategic elements and quick reflex requirements. It's also suitable for people who appreciate simple yet engaging browser-based games and enjoy the challenge of evolving their in-game character.

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

Diep.io videos

Diep.io - What Your Main Tank Says About YOU! (Analysis)

More videos:

  • Review - Diep.io vs Arras.io: Necromancer Comparison
  • Review - Diep.io tanks review (EP 2)

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Diep.io and ForthWrite)
Games
100 100%
0% 0
Email
0 0%
100% 100
Online Games
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Diep.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 Diep.io and ForthWrite

Diep.io Reviews

We have no reviews of Diep.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)

Social recommendations and mentions

Based on our record, Diep.io seems to be more popular. It has been mentiond 885 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.

Diep.io mentions (885)

  • Show HN: An online 2D MMO game, written in Rust and JavaScript
    partially inspired by https://diep.io come on now, partially?! - Source: Hacker News / about 2 years ago
  • Show HN: An online 2D MMO game, written in Rust and JavaScript [video]
    I made a game (https://polyfight.io/) which revolves around a player (a tank) leveling up and upgrading by killing shapes and other tanks (partially inspired by https://diep.io). It has a bunch of features, a vast number of tanks, an inbuilt chatting system, clans to make teams with your friends, a colour scheme maker, controllable sandboxes which can be public or private, a last man standing gamemode, and an... - Source: Hacker News / about 2 years ago
  • Why.
    The way you named your tank in diep.io kinda looks like erect!on. Source: over 2 years ago
  • Your OC is trapped in some kind of interdimensional liminal space when they sense a presence watching themโ€ฆ
    (Has anyone else said your OC reminds them of diep.io?). Source: over 2 years ago
  • WoTB Jumpscare
    Ok wtf the AFK destroyer troll in diep.io has evolved. Source: over 2 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 Diep.io and ForthWrite, you can also consider the following products

Agar.io - The smash hit game! Control your cell and eat other players to grow larger! Play with millions of players around the world and try to become the biggest cell of all!

ReclaimAI - Helps users prioritize their work and personal calendars

Mope.io - Start as a mouse, eat other players and climb the food chain in this Agar.io alternative.

Superhuman - Superhuman is an email management tool.

Slither.io - Slither.io is a multiplayer online video game. Players control an avatar resembling a worm, which consumes multicolored pellets, both from other players and ones that naturally spawn on the map in the game, to grow in size.

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