# ForthWrite vs Merlin AI

ForthWrite records 5,722 monthly visits with +4.6% month-over-month growth and Freemium, Free Trial, Contact for Pricing pricing. Merlin AI records 1,382,634 monthly visits with +13.1% growth and Freemium pricing.

| Metric | [ForthWrite](https://openaitools.app/tool/forthwrite) | [Merlin AI](https://openaitools.app/tool/merlin-ai) |
| :--- | :--- | :--- |
| Website URL | https://forthwrite.ai | https://www.getmerlin.in |
| Categories | AI Email Writer, AI Email Assistant, AI Email Generator, AI Reply | AI Assistant, AI Writing Assistants, AI Summarizer, AI Research Tool |
| Pricing Model | Freemium, Free Trial, Contact for Pricing | Freemium |
| Monthly Visits | 5,722 | 1,382,634 |
| MoM Growth Rate | +4.6% | +13.1% |
| Primary Market | United States | United States |
| Direct Visits | 2,249 | 695,322 |
| Review Score | 4.2 | 4.3 |
| Saved Count | 0 | 12 |
| Supported Platforms | Website | Website |

## ForthWrite

ForthWrite is an AI writing assistant aimed at people who live in their inbox. Instead of asking you to learn a new tool, it installs as a Gmail and Outlook web extension and adds a drafting widget directly to the compose box. On first use it analyses emails you have already sent to build a voice profile, so the very first suggested reply starts close to something you would actually send. The model is tuned for nuance and can also take a manual persona prompt when you want a specific register.

The product family spans three levels. Inbox is the individual product, with a free tier that provides 10 AI drafts a week plus voice matching, and a Pro tier that unlocks auto-drafting, batch drafting of long threads, a Prompt Lab for versioning and A/B testing prompts, recipient- and intent-aware drafting, voice dictation, smart retrieval over your past mail, and performance analytics. Teams extends Pro drafting to every seat in an organisation with a shared voice baseline, a shared prompt library, a team analytics dashboard, and a review record showing what was drafted, what changed, and which model produced it.

ForthWrite also sells consulting to professional-services firms such as accounting, tax, advisory, lending, and brokerage practices. Those engagements begin with a free 30-minute diagnostic and can extend into a paid audit, a 30-60 day roadmap, and implementation with written SOPs. The company is clear about its operating principle: ForthWrite drafts, and a person sends, so accountability and signature stay with the user.

**Pricing & Plans:** Freemium with a free forever tier (10 drafts per week, voice matching, no card required), Pro at $24/month billed annually ($29 monthly), and Teams from $59/seat/month billed annually ($79 monthly, 2-seat minimum). All paid plans start with a 14-day free trial; Teams gets a 30-day trial. An optional Bring Your Own API Key mode takes roughly 17% off. Consulting is scoped separately per firm.

- **Voice matching from your sent mail:** ForthWrite reads emails you have already sent to build a voice profile, then refreshes it roughly every 50 captured emails so drafts keep tracking how your writing evolves.
- **Auto-draft and batch drafting:** Pro users can have replies waiting when they open Gmail, and clear dozens of threads in parallel instead of writing each one by hand.
- **Recipient- and intent-aware drafting:** Drafts adapt tone to the person you are replying to and treat follow-ups, intros, and status updates as genuinely different jobs rather than one generic template.
- **Prompt Lab and performance analytics:** Version control and A/B test your prompts, then track acceptance rate, voice match, and intent mix on a measurable improvement curve.
- **Team standards and compliance guardrails:** On Teams, a shared voice baseline and shared prompt library keep every seat consistent, and a draft that breaks a firm rule stops the preparer with a written reason.

**Strengths:** Drafts pick up your real tone because the voice profile is built from mail you have already sent; Works inside Gmail and Outlook web with no migration or new inbox to learn; Strong free tier with 10 drafts a week and voice matching included, no card required; Teams adds shared prompts, team analytics, and a review record that firms usually need

**Limitations:** Web-based Gmail and Outlook only; there is no full desktop client experience; Full value depends on having a decent history of previously sent emails for the voice profile; Consulting engagements are custom-scoped, so pricing is not published

[Profile (Markdown)](https://openaitools.app/tool/forthwrite.md)

## Merlin AI

Merlin AI lowers the friction of using large language models by putting them where you already are: in the browser sidebar, over the page you are reading. A one-click shortcut summarizes articles, answers questions about a long PDF or YouTube video, drafts a reply in Gmail or LinkedIn, or explains a selection of code, so you avoid copying text into a separate chat window.

Underneath the interface, Merlin routes your prompts across a catalogue of leading models from different vendors instead of locking you into a single provider. Alongside chat, it offers Projects for reusable knowledge bases, Crafts for turning prompts into diagrams and infographics, custom bots with your own instructions, and image generation across many model choices. History, prompts and bots sync across the extension, web app and mobile apps.

The company markets one subscription as a cheaper alternative to buying several model subscriptions separately, with a free tier and a paid Pro plan, and states GDPR, ISO 27001 and SOC 2 compliance. It is a strong fit for people who work mostly inside the browser and want model choice without managing many accounts.

**Pricing & Plans:** Freemium. A free tier covers everyday chats and core extension features; Merlin Pro is advertised at $19 per month billed annually (with periodic promotional pricing such as $2/month offers). Exact limits and current promotions change, so check the pricing page.

- **In-page browser assistant:** A Chrome extension that summarizes, searches and writes directly over the page you are on, without switching tabs.
- **Multiple frontier models:** Access to leading models from several vendors in one place, so you can pick the best fit for each task.
- **Projects and custom bots:** Build reusable knowledge bases from your own documents and code, then query them repeatedly for tailored answers.
- **Crafts visual output:** Turn a prompt into flowcharts, mindmaps, charts and other diagram types for reports and presentations.
- **Sync across devices:** Chat history, saved prompts and custom bots carry over between the Chrome extension, web app, iOS and Android.

**Strengths:** Works inside the browser, so everyday tasks need no tab switching; Several vendor models available under one subscription; Projects, bots and prompt libraries make repeat work efficient; Available in regions where some AI services are restricted

**Limitations:** Free tier is limited, and useful features sit behind Pro; Model availability and tool set change frequently, so behavior can shift; Browser-first design is less convenient for people who prefer a desktop chat client

[Profile (Markdown)](https://openaitools.app/tool/merlin-ai.md)

## Frequently Asked Questions

### How do ForthWrite and Merlin AI compare in monthly traffic?

ForthWrite has 5,722 monthly visits, while Merlin AI has 1,382,634. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

ForthWrite has a month-over-month growth rate of +4.6%; Merlin AI has +13.1%.

### How does pricing compare?

ForthWrite: Freemium, Free Trial, Contact for Pricing. Freemium with a free forever tier (10 drafts per week, voice matching, no card required), Pro at $24/month billed annually ($29 monthly), and Teams from $59/seat/month billed annually ($79 monthly, 2-seat minimum). All paid plans start with a 14-day free trial; Teams gets a 30-day trial. An optional Bring Your Own API Key mode takes roughly 17% off. Consulting is scoped separately per firm. Merlin AI: Freemium. Freemium. A free tier covers everyday chats and core extension features; Merlin Pro is advertised at $19 per month billed annually (with periodic promotional pricing such as $2/month offers). Exact limits and current promotions change, so check the pricing page.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research. | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 2 | [Perplexity](https://openaitools.app/tool/perplexity-ai) | 88,310,223 | -3.7% | Freemium | Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models. | [.md](https://openaitools.app/tool/perplexity-ai.md) |
| 3 | [Grammarly](https://openaitools.app/tool/grammarly) | 58,867,412 | -1.5% | Freemium | Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides. | [.md](https://openaitools.app/tool/grammarly.md) |
| 4 | [Poe](https://openaitools.app/tool/poe) | 5,894,702 | +9.1% | Freemium | One app to chat with GPT, Claude, Gemini and hundreds of other AI models | [.md](https://openaitools.app/tool/poe.md) |
| 5 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 6 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 7 | [1min.AI](https://openaitools.app/tool/1min-ai) | 676,691 | +7.8% | Freemium, Paid | One AI subscription for chat, images, audio, video and agents | [.md](https://openaitools.app/tool/1min-ai.md) |
| 8 | [Chatbox](https://openaitools.app/tool/chatbox) | 567,170 | -16.1% | Freemium | One privacy-first AI client for GPT, Claude, Gemini and more | [.md](https://openaitools.app/tool/chatbox.md) |
| 9 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 10 | [Typing Mind](https://openaitools.app/tool/typing-mind) | 533,103 | +12.9% | Paid | The best frontend for AI. | [.md](https://openaitools.app/tool/typing-mind.md) |

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Source: https://openaitools.app/compare/forthwrite-vs-merlin-ai

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