# Letty vs Smart Assistant by Mailbutler

Letty records 198 monthly visits with -85.4% month-over-month growth and Freemium pricing. Smart Assistant by Mailbutler records 47,200 monthly visits with -8.7% growth and Freemium, Free Trial, Paid pricing.

| Metric | [Letty](https://openaitools.app/tool/letty) | [Smart Assistant by Mailbutler](https://openaitools.app/tool/smart-assistant) |
| :--- | :--- | :--- |
| Website URL | https://www.useletty.com | https://mailbutler.io |
| Categories | AI Email Writer, AI Email Assistant, AI Email Generator, AI Reply | AI Email Assistant, AI Email Generator, AI Response Generator, AI Summarizer |
| Pricing Model | Freemium | Freemium, Free Trial, Paid |
| Monthly Visits | 198 | 47,200 |
| MoM Growth Rate | -85.4% | -8.7% |
| Primary Market | India | United States |
| Direct Visits | 77 | 18,322 |
| Review Score | 3.8 | 4.5 |
| Saved Count | 1 | 6 |
| Supported Platforms | Website | Website |

## Letty

Letty positions itself as an inbox productivity layer rather than a full email client. After installing the Chrome extension, it appears alongside your Gmail composition window and analyses the thread in front of you. From there it can propose a contextually relevant reply, draft a longer message from a short prompt, or help you match the tone of earlier messages in the chain. The goal is straightforward: cut the minutes you spend staring at a blank reply box.

What separates Letty from a generic writing assistant is the training step. You can feed it your own documents, an FAQ list, or the text of a website, and it will pull answers and phrasing from that material when it writes. The dashboard reports how many characters you have attached, which makes it practical for support teams or founders who answer the same questions repeatedly.

Pricing follows a freemium shape with a genuinely usable entry point. The Free plan gives 10 AI credits each month and room for up to 400,000 training characters. Paid tiers step up quickly: Premium adds 150 credits and up to 4 million characters, and Platinum lifts credits to unlimited with a 10 million character training allowance. Credits reset on the first of each calendar month. The platform is Gmail-only today, with Outlook and Zoho described as future additions.

**Pricing & Plans:** Freemium. A Free plan offers 10 AI credits per month and up to 400,000 training characters. Premium is $9/month for 150 credits and 4M characters, and Platinum is $19/month for unlimited credits and 10M characters. Annual billing discounts are available, and credits reset each calendar month.

- **Context-aware smart replies:** Letty reads the incoming thread and proposes replies that fit the conversation, helping you clear your inbox without writing every response from scratch.
- **One-click email drafting:** Turn a rough idea into a finished message. Letty drafts professional emails for pitches, follow-ups, introductions, and everyday correspondence.
- **Train on your own knowledge:** Attach documents, FAQs, or a website URL and Letty draws on that material to answer questions accurately in your replies.
- **Style matching:** Letty can mirror your tone and phrasing so outgoing mail sounds like you rather than a generic template.
- **Gmail-native extension:** Letty lives inside Gmail as a Chrome extension, so drafting and replying happen where you already work with no separate app to manage.

**Strengths:** Works inside Gmail, so there is no new inbox to learn; Training on your own documents or website produces more accurate, on-brand replies; Free tier lets you test the core workflow at no cost; Clear, tiered pricing with an unlimited-credit top plan

**Limitations:** Officially supports Gmail only; Outlook and other providers are listed as “coming soon”; Free tier is capped at 10 AI credits per month and modest training-character limits; Credit allowances reset on the calendar month rather than the billing anniversary; Advanced controls for style fine-tuning require effort before replies fully match your voice

[Profile (Markdown)](https://openaitools.app/tool/letty.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 Letty and Smart Assistant by Mailbutler compare in monthly traffic?

Letty has 198 monthly visits, while Smart Assistant by Mailbutler has 47,200. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Letty has a month-over-month growth rate of -85.4%; Smart Assistant by Mailbutler has -8.7%.

### How does pricing compare?

Letty: Freemium. Freemium. A Free plan offers 10 AI credits per month and up to 400,000 training characters. Premium is $9/month for 150 credits and 4M characters, and Platinum is $19/month for unlimited credits and 10M characters. Annual billing discounts are available, and credits reset each calendar month. 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 | [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) |
| 4 | [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) |
| 5 | [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) |
| 6 | [ParagraphAI](https://openaitools.app/tool/paragraphai) | 23,267 | -34.6% | Freemium | An AI writing assistant and keyboard for error-free writing anywhere | [.md](https://openaitools.app/tool/paragraphai.md) |
| 7 | [AImReply – Free AI Email Writer](https://openaitools.app/tool/ai-email-assistant-aimreply) | 17,618 | +6.9% | Free | Write polished, on-tone emails in seconds — free, right in your browser | [.md](https://openaitools.app/tool/ai-email-assistant-aimreply.md) |
| 8 | [Ellie](https://openaitools.app/tool/tryellie-com) | 9,297 | -0.3% | Free Trial, Paid | Your inbox on autopilot — replies drafted overnight in your own voice. | [.md](https://openaitools.app/tool/tryellie-com.md) |
| 9 | [ForthWrite](https://openaitools.app/tool/forthwrite) | 5,722 | +4.6% | Freemium, Free Trial, Contact for Pricing | AI email drafting that writes in your own voice, inside Gmail and Outlook | [.md](https://openaitools.app/tool/forthwrite.md) |
| 10 | [Auto Gmail: ChatGPT for email](https://openaitools.app/tool/auto-gmail-chatgpt-for-email) | 4,887 | +14.9% | Paid | An AI drafting layer that writes most of your Gmail replies before you open them. | [.md](https://openaitools.app/tool/auto-gmail-chatgpt-for-email.md) |

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

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