# SimpleGPT vs Smart Assistant by Mailbutler

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

| Metric | [SimpleGPT](https://openaitools.app/tool/simplegpt) | [Smart Assistant by Mailbutler](https://openaitools.app/tool/smart-assistant) |
| :--- | :--- | :--- |
| Website URL | https://chromewebstore.google.com/detail/simplegpt/ahbcgecbbojefmeonbhhebjkfaflgdhe | https://mailbutler.io |
| Categories | AI Writing Assistants, AI Email Generator, AI Rewriter, AI Translate | AI Email Assistant, AI Email Generator, AI Response Generator, AI Summarizer |
| Pricing Model | Free | Freemium, Free Trial, Paid |
| Monthly Visits | 0 | 47,200 |
| MoM Growth Rate | — | -8.7% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 18,322 |
| Review Score | 3.2 | 4.5 |
| Saved Count | 1 | 6 |
| Supported Platforms | Browser Extension | Website |

## SimpleGPT

SimpleGPT is a Chrome extension built for one purpose: cutting the friction out of everyday writing tasks. Instead of juggling separate tabs for a paraphrasing site, a translator, and an email generator, you install the extension once and reach all three helpers from the browser you already have open. It is a single-purpose utility rather than a full writing platform, and its footprint is tiny — the whole extension ships in under 30 KB.

The workflow is deliberately simple. For email composition you supply a handful of keywords or a rough intent, and the tool expands that into a complete message. For rewriting, it takes text you already have and returns a clearer, more concise version so your point lands without extra padding. Translation covers dozens of languages, which makes it useful for short cross-border messages and for reading foreign-language text you encounter while browsing.

The listing shows a small but stable install base (17 users) and a single 5-star rating, and the last published update was version 1.1 in April 2023. That means SimpleGPT should be treated as a mature, no-longer-actively-developed utility: it does what it advertises, but you should not expect new features, integrations, or a large support operation. Anyone comparing it with modern AI writing suites should weigh that trade-off, since newer tools offer broader context handling and richer editing controls.

**Pricing & Plans:** SimpleGPT is free to install and use. The Chrome Web Store listing shows no paid tier, subscription, or in-app purchase, and no usage limits are advertised.

- **AI email composition:** Enter a few keywords or a rough outline and SimpleGPT generates a complete email draft, so you start from a finished structure instead of a blank page.
- **One-click text rewriting:** Feed it text you have already written and get a clearer, tighter version back — handy for polishing blog posts, assignments, or outreach messages.
- **Multi-language translation:** Translate text into and out of dozens of languages directly from your browser, without opening a separate translation site.
- **Runs inside Chrome:** Everything happens from the extension's toolbar button on the pages you already use, so there is no new app to learn or separate account to manage.
- **Very small footprint:** The extension ships at roughly 27 KB, so it adds essentially no load time or memory overhead to your browser.

**Strengths:** Completely free with no account, subscription, or credit card required; Combines email drafting, rewriting, and translation in one lightweight extension; Tiny install size (about 27 KB), so it barely affects browser performance; Works directly in Chrome on the pages you already use, with no separate app to open

**Limitations:** No updates published since version 1.1 in April 2023, so it is not actively developed; Small user base and very limited review history, which makes reliability hard to judge; Basic feature set compared with modern AI writing assistants that handle long documents and richer editing

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

## 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)

## Frequently Asked Questions

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

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

### How do their growth rates compare?

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

### How does pricing compare?

SimpleGPT: Free. SimpleGPT is free to install and use. The Chrome Web Store listing shows no paid tier, subscription, or in-app purchase, and no usage limits are advertised. 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.

## 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 | [Sider](https://openaitools.app/tool/sider-ai-extension) | 2,644,740 | -10.6% | Freemium | Your AI agent for the browser: chat, automate and create from one sidebar | [.md](https://openaitools.app/tool/sider-ai-extension.md) |
| 4 | [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) |
| 5 | [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) |
| 6 | [HyperWrite](https://openaitools.app/tool/hyperwrite-ai) | 255,429 | +34.4% | Freemium | AI writing assistant with autocomplete, research, and a Chrome extension | [.md](https://openaitools.app/tool/hyperwrite-ai.md) |
| 7 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Summarize, bookmark and write with AI right in your browser | [.md](https://openaitools.app/tool/kome-ai.md) |
| 8 | [editGPT](https://openaitools.app/tool/editgpt) | 165,872 | -16.3% | Freemium | AI proofreading that shows every change as a track-change you can accept or reject | [.md](https://openaitools.app/tool/editgpt.md) |
| 9 | [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) |
| 10 | [Compose AI](https://openaitools.app/tool/compose) | 34,896 | -48.1% | Freemium, Free Trial, Contact for Pricing | AI autocomplete that finishes your sentences wherever you type | [.md](https://openaitools.app/tool/compose.md) |

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

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