# Smart Assistant by Mailbutler vs WorkGPT

Smart Assistant by Mailbutler records 47,200 monthly visits with -8.7% month-over-month growth and Freemium, Free Trial, Paid pricing. WorkGPT records 0 monthly visits with — growth and Freemium pricing.

| Metric | [Smart Assistant by Mailbutler](https://openaitools.app/tool/smart-assistant) | [WorkGPT](https://openaitools.app/tool/workgpt) |
| :--- | :--- | :--- |
| Website URL | https://mailbutler.io | https://workspace.google.com/marketplace/app/workgpt_gpt_chatgpt_for_workspace/368806015202 |
| Categories | AI Email Assistant, AI Email Generator, AI Response Generator, AI Summarizer | AI Assistant, AI Writing Assistants, AI Productivity Tools, AI Email Assistant |
| Pricing Model | Freemium, Free Trial, Paid | Freemium |
| Monthly Visits | 47,200 | 0 |
| MoM Growth Rate | -8.7% | — |
| Primary Market | United States | Global |
| Direct Visits | 18,322 | 0 |
| Review Score | 4.5 | 4.2 |
| Saved Count | 6 | 2 |
| Supported Platforms | Website | Workspace |

## Smart Assistant by Mailbutler

Mailbutler is an email productivity extension for Apple Mail, Gmail, and Outlook, and its AI component is the Smart Assistant. Rather than being a standalone chatbot, the assistant is embedded in the compose and read views of the inbox you already use. It can compose an email from a few short keywords, draft a reply framed as positive, negative, or neutral, summarize an entire thread, or correct grammar and phrasing in a draft — all without switching apps or copying text elsewhere.

The AI layer is deliberately connected to the rest of Mailbutler's toolkit. Follow-up suggestions analyze tracked emails — opens, link clicks, and engagement patterns — then classify threads as high, medium, or low priority, and the Smart Assistant can draft the follow-up itself. That combination of tracking data plus generation is what makes the assistant useful in sales and client-facing work, where knowing who to chase matters as much as what to write.

The rest of the extension supplies email tracking, message templates, mail merge, smart timing, tasks and notes, shared inbox assignments, and signature marketing. On privacy, Mailbutler is ISO/IEC 27001 certified and GDPR compliant with servers in Frankfurt, Germany. Emails are still sent from your own server, message content is not analyzed or stored in the backend for general operation, and when you use the Smart Assistant the email body is sent to OpenAI only for that request, with email addresses replaced by dummy variables. Plans range from a free-forever Starter tier to paid Smart and Business plans, all starting with a free 14-day trial that includes every feature and no credit card requirement.

**Pricing & Plans:** There is a free-forever Starter plan plus a free 14-day trial with all features and no credit card. Paid tiers are billed per user per month (about $4 Starter, $7 Professional, $11 Smart, and higher Business pricing when billed yearly, with monthly pricing slightly higher) and available in USD or EUR. The AI Smart Assistant is included from the Smart plan upward; email tracking, templates, mail merge, tasks, and signatures are spread across the tiers.

- **AI drafting and reply generation:** Turn a handful of keywords or bullet points into a full, sendable email, and generate replies framed as positive, negative, or neutral depending on the situation.
- **Thread summarization:** Condense long email chains into the key points so you can catch up fast and respond without re-reading every message.
- **Grammar and tone correction:** The assistant rewrites and corrects your message for grammar, spelling, and phrasing before you hit send.
- **Smart Follow-ups:** Follow-up suggestions combined with open and click tracking tell you which threads are urgent, and the assistant can draft the follow-up for you.
- **Built into a full email toolkit:** The AI features sit alongside tracking, message templates, mail merge, tasks and notes, shared inbox assignments, and email signatures so your whole workflow stays in one inbox.

**Strengths:** Works inside Apple Mail, Gmail, and Outlook instead of forcing another app into your stack; AI drafting, summarization, and grammar checks are combined with tracking and follow-up prioritization in one place; Strong privacy posture: ISO/IEC 27001 certified, GDPR compliant, and servers located in Germany; Free 14-day trial unlocks all features with no credit card required

**Limitations:** Most genuinely useful AI features require a paid plan, and full automation sits on higher tiers; Free tier is limited, so the free-forever Starter plan is best treated as a lite entry point; Used for email drafting, email body text is transmitted to OpenAI (addresses are tokenized), which some compliance teams will want to review; Feature depth varies slightly by client since it is an extension layered over three different email apps

[Profile (Markdown)](https://openaitools.app/tool/smart-assistant.md)

## WorkGPT

WorkGPT is a sidebar-based AI assistant that lives inside the Google Workspace apps you already use. Once installed, it appears in Docs, Sheets, Slides, Gmail and Calendar, so you can improve writing, proofread, paraphrase, shorten or expand text, draft email replies, generate slide decks, translate content and extract structured data without breaking your flow or switching tabs. The add-on routes requests across a range of frontier models from several providers, letting users pick the engine that fits the task at hand.

Beyond chat-style assistance, WorkGPT ships a substantial set of custom spreadsheet functions for Sheets. Formulas such as WORKGPT, WORKGPT_TRANSLATE, WORKGPT_REWRITE, WORKGPT_SUMMARIZE, WORKGPT_EXTRACT and WORKGPT_TABLE let you run AI operations across entire columns of cells, which makes it practical for bulk content generation, batch translation, data cleaning, classification and enrichment at scale.

The product is distributed through the Google Workspace Marketplace and is also offered as a Chrome extension, an iOS app and a web app under the same brand family. It is designed to be low-friction: free credits on install, no sign-up requirement and no API key needed to get started.

**Pricing & Plans:** Freemium. New users receive free credits on install, and paid tiers unlock higher usage limits and premium models. No API key or account signup is required to start using the free credits.

- **In-app assistant for Docs, Sheets, Slides, Gmail and Calendar:** Open the WorkGPT sidebar inside any supported Google app and edit, rewrite, summarize or generate content without leaving the document.
- **Multi-model routing:** Draw on models from several leading providers, including OpenAI, Google Gemini, Anthropic Claude, DeepSeek, xAI Grok, Meta Llama and Mistral, choosing the engine that suits the job.
- **70+ Sheets custom functions:** Spreadsheet formulas such as WORKGPT_TRANSLATE, WORKGPT_SUMMARIZE, WORKGPT_EXTRACT and WORKGPT_TABLE apply AI to whole ranges of cells for bulk operations.
- **Writing, email and content creation:** Draft emails and replies, write articles, blog posts, social captions, video scripts, product descriptions and resumes, all with tone and style controls.
- **Image generation and content cleanup:** Generate images and logos from a prompt, and use OCR, grammar fixing, formatting and proofreading tools to clean up existing material.

**Strengths:** Works inside the Google apps you already use, so there is no context switching; Access to models from multiple providers rather than being locked to one; Powerful Sheets formula library makes bulk AI processing practical; Free credits on install and no API key setup required

**Limitations:** Free credits are limited, so heavier use requires a paid plan; Feature coverage varies slightly between the different Google apps; The large number of models and functions can be overwhelming for new users

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

## Frequently Asked Questions

### How do Smart Assistant by Mailbutler and WorkGPT compare in monthly traffic?

Smart Assistant by Mailbutler has 47,200 monthly visits, while WorkGPT has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Smart Assistant by Mailbutler has a month-over-month growth rate of -8.7%; WorkGPT has —.

### How does pricing compare?

Smart Assistant by Mailbutler: Freemium, Free Trial, Paid. There is a free-forever Starter plan plus a free 14-day trial with all features and no credit card. Paid tiers are billed per user per month (about $4 Starter, $7 Professional, $11 Smart, and higher Business pricing when billed yearly, with monthly pricing slightly higher) and available in USD or EUR. The AI Smart Assistant is included from the Smart plan upward; email tracking, templates, mail merge, tasks, and signatures are spread across the tiers. WorkGPT: Freemium. Freemium. New users receive free credits on install, and paid tiers unlock higher usage limits and premium models. No API key or account signup is required to start using the free credits.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [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) |
| 2 | [Superhuman](https://openaitools.app/tool/superhuman) | 6,514,241 | +7.9% | Paid | The AI productivity suite with agents, email, and docs that work wherever you do | [.md](https://openaitools.app/tool/superhuman.md) |
| 3 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 4 | [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) |
| 5 | [Spark Mail](https://openaitools.app/tool/spark-mail) | 435,229 | -13.5% | Freemium, Free Trial | Smart, focused email with AI help — for individuals and teams | [.md](https://openaitools.app/tool/spark-mail.md) |
| 6 | [GPT Workspace](https://openaitools.app/tool/gpt-workspace-1) | 431,507 | +43.8% | Freemium, Free Trial, Paid | Bring ChatGPT, Claude and Gemini into Google Docs, Sheets, Slides and Gmail | [.md](https://openaitools.app/tool/gpt-workspace-1.md) |
| 7 | [BlueMail](https://openaitools.app/tool/bluemail) | 319,805 | -5.8% | Free | A privacy-first email client with built-in AI writing help | [.md](https://openaitools.app/tool/bluemail.md) |
| 8 | [Plus AI](https://openaitools.app/tool/plus-ai-presentation-maker) | 267,888 | -11.4% | Freemium, Free Trial, Paid, Contact for Pricing | AI presentation maker that builds native PowerPoint and Google Slides decks | [.md](https://openaitools.app/tool/plus-ai-presentation-maker.md) |
| 9 | [Numerous.ai](https://openaitools.app/tool/numerous) | 128,828 | -17% | Freemium, Free Trial, Paid | ChatGPT inside Google Sheets and Excel, with no API keys required | [.md](https://openaitools.app/tool/numerous.md) |
| 10 | [WriteMail.ai](https://openaitools.app/tool/writemail-ai) | 79,919 | -29.9% | Freemium | Turn a few key points into polished, on-tone emails | [.md](https://openaitools.app/tool/writemail-ai.md) |

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Source: https://openaitools.app/compare/smart-assistant-vs-workgpt

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