Mailbutler Smart Assistant vs Shortwave
Mailbutler Smart Assistant
mailbutler.io
Shortwave
shortwave.comSide by side
| Figure | Mailbutler Smart Assistant | Shortwave |
|---|---|---|
| Price from | $7/mo | $30/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | — |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 10 | 3 |
| Spec score · Email clients | 9.4 (#2) | 8.8 (#17) |
| Spec score · AI Email Assistants | 9.2 (#3) | 8.2 (#16) |
| Free plan | Yes | Yes |
| Integrations | Business plans sync tracking events with HubSpot and Salesforce and support Google Analytics 4 UTM data. | The AI can connect with apps including Slack, Calendar, Notion, Asana, and HubSpot; the pricing page also describes built-in integrations or MCP. |
| Product | Mailbutler presents Smart Assistant as an AI email assistant for Apple Mail, Gmail, and Outlook. | Shortwave is an AI email app that helps users organize, schedule, write, and search email using prompts. |
| Security | Mailbutler says it is ISO/IEC 27001 certified and GDPR compliant, and that backend data is encrypted. | Shortwave says it has CASA Tier 2 compliance and undergoes an annual third-party security audit. |
| Paid from | 4 | 30 |
| Support | Mailbutler says its customer support team answers queries 24/7 and provides a Support Center. | The pricing page describes plan support as direct help from a real person on the Shortwave team. |
Plans
Mailbutler Smart Assistant
- StarterFree
- Professional$9 a month
- Smart$14 a month
- Business$32 a month
- Professional (yearly billing)$7 a month
- Professional (monthly billing)$9 a month
- Smart (yearly billing)$11 a month
- Smart (monthly billing)$14 a month
- Business (yearly billing)$24 a month
- Business (monthly billing)$32 a month
In their own words
Mailbutler Smart Assistant
Mailbutler Smart Assistant adds AI writing and email-management tools to Apple Mail, Microsoft Outlook, and Gmail. It drafts messages from keywords or prepares replies using details a user supplies, with controls for format, length, style, tone, and language. It can summarize selected emails, identify to-dos for Mailbutler Tasks, and suggest spelling and grammar improvements to drafts. Mailbutler says the assistant uses OpenAI GPT-4o. Smart Assistant is included in a 14-day trial, then requires a Smart or Business subscription. The separate free Starter plan includes a visible Mailbutler watermark on sent emails. Mailbutler says email subjects and bodies are processed by Microsoft Azure OpenAI Service in the EU, with personal data redacted before submission to the underlying model. It also says backend data is encrypted and that it is ISO/IEC 27001 certified and GDPR compliant. Apple Mail support is listed for macOS Tahoe, Sequoia, Sonoma, and Ventura; mobile apps require iOS 15 or later or Android 7 or later.
Shortwave
Shortwave is an AI email app for organizing, writing, scheduling, and searching messages with prompts. Email tools include inbox splits, bundles, delivery schedules, todos, summaries, AI filters, and AI-assisted search. Teams can share live threads, comment privately, assign next steps, and use shared labels. Connections include Slack, Calendar, Notion, Asana, and HubSpot; the pricing page also describes built-in integrations or MCP. Shortwave runs on Android, iOS, macOS, web, and Windows, and includes calendar tools and scheduled sending. It offers a free plan and a 14-day trial; paid plans start at $30/user/mo. Business is $30 a month per seat and includes five years of AI search history, up to 50 threads per search, and three AI-powered filters. Premier and Max cost $45.00 USD and $120 a month per seat, respectively, with unlimited history and higher search-thread and filter limits. Shortwave says data is encrypted at rest and in transit, and customer data is not used to train third-party LLMs. It lists CASA Tier 2 compliance and annual third-party security audits.