Software Alternatives, Accelerators & Startups

Butter CMS VS ForthWrite

Compare Butter CMS VS ForthWrite and see what are their differences

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Butter CMS logo Butter CMS

API-first CMS + blog platform built for developers & marketers.

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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  • Butter CMS Landing page
    Landing page //
    2023-10-21

ButterCMS is an API-based or 'headless' CMS that hosts and maintains the entire CMS platform which includes the CMS dashboard (where you manage your content) and the Content API. ButterCMS is built for SEO, matches your brand, instantly and forever.

  • 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.

Butter CMS

$ Details
freemium $50.0 / Monthly
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

Butter CMS features and specs

  • Ease of Use
    Butter CMS offers a user-friendly interface and easy setup process, making it accessible for users without extensive technical knowledge.
  • Content Scheduling
    The CMS provides content scheduling capabilities, allowing users to plan and automate the release of content at specific times.
  • API-First Approach
    Butter CMS is designed with an API-first approach, offering robust RESTful APIs that can integrate seamlessly with any tech stack.
  • SEO Optimization
    The platform includes built-in SEO tools that help optimize content for search engines, improving visibility and search rankings.
  • Multi-site Management
    It allows for managing multiple websites from a single dashboard, making it ideal for organizations with various web properties.
  • Customization
    Butter CMS is highly customizable, providing flexibility to tailor-made solutions that fit the clientโ€™s specific requirements.
  • Content Preview
    Offers a real-time content preview feature which helps content creators see how their changes will appear before publishing.
  • Scalability
    Designed to handle growing amounts of content and traffic, making it a suitable choice for both small blogs and large enterprises.

Possible disadvantages of Butter CMS

  • Cost
    Butter CMS can be relatively expensive, especially for small businesses or startups with limited budgets.
  • Limited Plugins
    Compared to more established CMS platforms like WordPress, Butter CMS has fewer plugins and extensions available.
  • Learning Curve
    While the interface is generally user-friendly, some users may still face a learning curve when adapting to the API-first approach.
  • Dependency on Developers
    Non-technical users may find it challenging to leverage the full capabilities of the platform without developer assistance.
  • Limited Community Support
    Being a relatively niche product, Butter CMS has a smaller user community, which can limit the availability of third-party support and resources.
  • API Rate Limits
    API rate limits could be a constraint for applications requiring high-frequency data fetching.
  • Vendor Lock-In
    As a proprietary platform, there is a risk of being locked into Butter CMS and finding it difficult to migrate to another CMS later.

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 Butter CMS

Overall verdict

  • Overall, Butter CMS is a good choice for those seeking a powerful, flexible, and user-friendly CMS solution that supports modern web development techniques. It is particularly well-suited for those looking for a headless CMS with strong developer support and seamless integration capabilities.

Why this product is good

  • Butter CMS is considered a strong option for many users due to its user-friendly interface, headless CMS capabilities, and built-in SEO features. It allows for easy integration with various frameworks and supports content management with minimal hassle. The platform's flexibility and robust API make it a viable choice for developers seeking a seamless integration experience. Additionally, it offers features such as content scheduling, multi-language support, and fast content delivery, which are essential for businesses aiming to streamline their content workflows.

Recommended for

  • Developers looking for a headless CMS
  • Businesses needing a scalable and flexible content management solution
  • Teams that require multi-language support
  • Organizations focusing on SEO and content performance
  • Users who prioritize ease of integration with modern frameworks

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

Butter CMS videos

Tutorial: Create dynamic landing pages using ButterCMS Components

ForthWrite videos

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

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Category Popularity

0-100% (relative to Butter CMS and ForthWrite)
CMS
100 100%
0% 0
Email
0 0%
100% 100
Blogging
100 100%
0% 0
Email Productivity
0 0%
100% 100

Questions & Answers

As answered by people managing Butter CMS 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 Butter CMS 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 Butter CMS and ForthWrite

Butter CMS Reviews

Best Headless CMS in 2022
Butter CMS is a headless CMS that enables smooth transferring the data from old traditional CMS. ButterCMS can integrate with any framework and also has SDKs + Framework plugins for Ruby, Rails, NodeJS, PHP, Laravel, .NET, Python, Django, Javascript, React, and more. ButterCMS also boasts features such as custom content types, media library, a CDN for assets, testing...
Source: flatlogic.com
34 Headless CMS That Should Be On Your Radar
Chicago-based Butter CMS is an API-first CMS that was launched in 2014. Features of Butter CMS include custom page types, relational content modeling, webhooks, CDN support, multi-site support, testing environment, and an admin interface that can be easily customized. Butter CMS provides an independent blogging platform that you can integrate into any framework.
Source: www.cmswire.com
ButterCMS vs WordPress: Headless CMS vs Traditional CMS
This entrenched familiarity with WordPress can be a challenge for a modern CMS like ButterCMS. Butter is quite different from what youโ€™re used to, at least from an architectural standpoint. It leads to many questions when you first discover us, questions that weโ€™re going to cover in this series. The goal of this series is to examine how ButterCMS compares to a traditional...
Source: buttercms.com

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, Butter CMS seems to be more popular. It has been mentiond 10 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.

Butter CMS mentions (10)

  • How to Use Postman to Test an API During Development in 5 Simple Steps
    Let's try out Postman with ButterCMS, a headless CMS platform that stands out for its comprehensive REST API. This tutorial will guide you through testing ButterCMS's REST API endpoints with Postman. You will learn how to test API using Postman. - Source: dev.to / over 1 year ago
  • Different flavors of content management
    Webflow, Storyblok, and ButterCMS are great examples of SaaS CMSs. - Source: dev.to / almost 3 years ago
  • How to Add a Plug & Play Blog to Your Java App Using a headless CMS
    Learn more about why you should use the Java programming language and ButterCMS to build your blog here. Source: about 3 years ago
  • Good blog, marketing and product headless CMS for rails?
    We use Butter CMS (https://buttercms.com), and itโ€™s an absolute delight. Blog authors and editors interact with Butter, and we integrate the content straight into our controller and views with a very tiny caching layer applied to their client library. Have done a few other approaches in the past, including roll-our-own and running Wordpress inside the same Apache container as the rails app. The Butter approach is... Source: over 3 years ago
  • Top 10 Headless CMS in 2023
    Butter CMS This is a headless CMS that is easy to use and it provides SEO support. Provides libraries that work with any framework. Butter CMS also offers access to CDNs, and webhooks and they have a fast content update. Butter CMS provides security support for its users and its admin page is customizable. Pricing: Butter CMS has a free plan for community use. It has a paid plan for professional use, starting... - Source: dev.to / 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 Butter CMS and ForthWrite, you can also consider the following products

Contentful - You don't need another CMS. You need a better way to manage content โ€” unified, structured, and ready to deploy to any digital channel.

ReclaimAI - Helps users prioritize their work and personal calendars

Strapi - Manage any content. Anywhere. The leading open-source headless CMS. 100% JavaScript / TypeScript and fully customizable.

Superhuman - Superhuman is an email management tool.

Prismic - prismic.io is a web software you can use to manage content in any kind of website or app. API-driven.

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