Software Alternatives, Accelerators & Startups

Sunsama VS ForthWrite

Compare Sunsama VS ForthWrite and see what are their differences

Sunsama logo Sunsama

Calendar and scheduling for teams

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
  • Sunsama Landing page
    Landing page //
    2023-07-01
  • 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.

Sunsama

$ Details
-
Platforms
-
Release Date
-
Startup details
Country
United States

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

Sunsama features and specs

  • User-Friendly Interface
    Sunsama offers an intuitive and clean interface, making it easy for users to navigate and integrate into their daily routine without a steep learning curve.
  • Task and Calendar Integration
    Sunsama integrates tasks with your calendar, allowing for a unified view of your schedule and to-do list, ensuring better time management.
  • Focus on Deep Work
    The platform encourages users to allocate time blocks for deep work, enhancing productivity and focus by minimizing context switching.
  • Collaboration Features
    Sunsama includes collaboration tools, making it easy to coordinate with team members and manage shared projects efficiently.
  • Cross-Platform Support
    With support for multiple platforms, including web and mobile, users can access and update their plans from anywhere.

Possible disadvantages of Sunsama

  • Cost
    Sunsama is a premium service that requires a subscription fee, which might be a barrier for some users, especially when there are free alternatives available.
  • Limited Integration
    While Sunsama does offer several integrations, it may not support all the external tools and services that a user might want to connect with.
  • Learning Curve for Advanced Features
    Despite its general user-friendliness, some of the more advanced features may have a learning curve, requiring users to spend time understanding how to best utilize them.
  • Maturity of the Product
    As a relatively new entrant in the productivity tool market, Sunsama may lack some of the refinements and features found in more established competitors.
  • Dependency on Internet Connection
    Sunsama relies on internet connectivity for most functionalities, which can be a drawback for users who need offline access.

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 Sunsama

Overall verdict

  • Yes, Sunsama is considered a good tool for individuals looking for a structured approach to task and time management. Its user-friendly interface, seamless integrations, and emphasis on daily planning make it a valuable option for enhancing productivity.

Why this product is good

  • Sunsama is designed to help users organize their daily tasks and calendar in one place, making it easier to plan and prioritize work. The platform integrates with popular tools like Google Calendar, Trello, and Slack, which streamlines workflow for users who frequently switch between these applications. Sunsama's daily planning and review process encourages users to focus on meaningful tasks and maintain productivity, making it appealing for professionals seeking structured planning.

Recommended for

    Sunsama is recommended for busy professionals, remote workers, freelancers, and anyone who needs a comprehensive tool to manage their daily schedule and tasks effectively. It's especially beneficial for those who rely on multiple productivity tools and seek a single platform to centralize their task management.

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

Sunsama videos

Sunsama Calendar Review | Sunrise Alternative?! ๐Ÿ“†

More videos:

  • Review - Sunsama: Product Tour

ForthWrite videos

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

Add video

Category Popularity

0-100% (relative to Sunsama and ForthWrite)
Productivity
100 100%
0% 0
Email
0 0%
100% 100
Task Management
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Sunsama 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 Sunsama 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 Sunsama and ForthWrite

Sunsama Reviews

The Best ADHD Apps for Adults: Top 8 Picks for Better Productivity
Sunsama pulls tasks from various tools into unified, manageable calendar blocks, greatly enhancing your time estimation and management.
Source: dev.to
Alternative products to New Google Calendar
SunsamaIf Trello & Google Calendar had a baby.ProductivityTask ManagementCalendar and Sche...3,371get itRecommendationsPedro LopesCompletely changed how I Kanban-organise my work!Stowe BoydI use daily! Especially as a front-end to Asana.Ashutosh PriyadarshySunsama puts your calendar side by side with your tasks and it integrates with all your other tools (Jira, Asana,...

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, Sunsama seems to be more popular. It has been mentiond 17 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.

Sunsama mentions (17)

  • Ask HN: What productivity tools do you use?
    Https://sunsama.com - inbox for Slack I spend a TON of time in Slack. I used to feel distracted by unimportant messages and constantly worried about losing track of important messages. Dispatch helps with both issues: i/ Stopping distraction: it's much easier to separate out the important messages from everything else. I can set rules and filters to route messages into different "Inboxes". e.g. Important, Clients,... - Source: Hacker News / about 3 years ago
  • Which productivity apps do you use?
    Sunsama - My clients use Monday, ClickUp, and Asana. Sunsama lets me pull in tasks from all these apps, my email, calendar, and more to plan out my weekly objectives and daily tasks. Source: over 3 years ago
  • App that plans your day
    I've been using Sunsama for a few weeks now. It's not perfect, but it's the best I've found so far. Source: over 3 years ago
  • What's Your Biggest Challenge When It Comes to Time Management
    I've been using sunsama.com for time blocking and it helps manage the best part of my day. Source: over 3 years ago
  • My Productivity System in 2022
    My productivity "hack" for 2022 was discovering Sunsama[0] a few weeks ago. I was usually using a single text file from which I was removing done items. The problem was that I then didn't remember all those small things I did that added up to big amounts of time. The feeling of time running away without remembering how is really demotivating. With this, I can see on a calendar view when I did what, it's... - Source: Hacker News / almost 4 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 Sunsama and ForthWrite, you can also consider the following products

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

ReclaimAI - Helps users prioritize their work and personal calendars

TickTick - TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.

Superhuman - Superhuman is an email management tool.

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

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