Boomerang vs Mailbutler
We give Boomerang and Mailbutler the same GPA: 3.4 out of 4.0. They get the same grade on all five counts.
Price, platforms and features side by side. The table says where each price was read and when.
Boomerang
Send later, follow-up reminders and meeting scheduling for Gmail
Mailbutler
Email tracking and team tools for Apple Mail, Gmail and Outlook
How we grade them
| 3.4GPABoomerangVery good | 3.4GPAMailbutlerVery good | |
|---|---|---|
| Value for money | BPersonal is $4.98 a month billed annually, about half the $9 that's typical here, with unlimited credits and the phone apps. But it's for @gmail.com addresses only. A Google Workspace account needs Pro at $14.98, or $19.98 paid monthly. Cheap for one crowd, dear for the other. | BPaid Starter is $4 a user a month billed yearly, but its feature list is the same as the free plan's. The useful stuff is Professional at $7, with templates, mail merge and assignments, and Smart at $11 with the AI. That's around the $9 that's typical here. Business jumps to $24. |
| Free plan and trial | BBasic is free for good, with Send Later, reminders, response tracking, read receipts and Inbox Pause. But 10 message credits a month is tight, and the phone apps aren't included. New accounts do get 30 days of Boomerang Professional with no card. | BStarter is free for good, with first-open and first-click tracking, real-time notifications and signatures. But sent emails carry a visible Mailbutler watermark, and that's all you get. The 14-day trial of every feature needs no credit card. |
| Features | AIt's a focused tool and it does its one job fully: Send Later, messages that come back when you choose, follow-up nudges, read receipts and click tracking, Inbox Pause, and booking a meeting from inside an email. Recurring messages need Pro. | AOpen and link tracking, templates with placeholders, mail merge from your contacts or a CSV file, scheduled sending, notes and tasks on emails, and assigning mail in a shared inbox you already have. Automations tag things for you. For an add-on that's the full set. The AI Smart Assistant needs Smart. |
| Ease of use | BNo rating on record, so a B is our ceiling. It's a browser extension that sits inside Gmail, and you can type a time like "next Monday" instead of poking at a date picker. | BNo rating on record, so a B is our ceiling. It adds itself to the mail app you already use, so there's no new inbox to learn. The iOS and Android apps are companions that need a desktop install. |
| Platforms and integrations | AA browser extension plus iPhone and Android apps on paid plans, and it connects to Zoom, Google Meet, Salesforce and GQueues. It's Gmail and Google Workspace only, mind. Boomerang for Outlook is a separate product with its own subscription. | AIt runs inside Apple Mail, Gmail in Chrome, Safari or Edge, and Outlook, with companion apps for iPhone and Android. It connects to HubSpot, Salesforce, Asana, Todoist, Trello and Evernote. Custom SMTP is listed as coming soon. |
| Best for | sending later and chasing replies in Gmail | tracking and templates inside the mail app you have |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Boomerang and Mailbutler. How we grade
Where they differ
- Boomerang starts at $4.98 per month, billed annually (Personal, Gmail addresses only). Mailbutler starts at $4 per user / month, billed yearly (paid Starter).
- Only Mailbutler lists macOS and Windows apps.
- Boomerang also covers booking links.
- Mailbutler also covers templates, tasks, shared inbox and workflow automation.
At a glance
| Boomerang | Mailbutler | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $4.98 per month, billed annually (Personal, Gmail addresses only) | $4 per user / month, billed yearly (paid Starter) |
| Free plan | Basic plan: 10 message credits a month for Gmail and Google Workspace, with Send Later, reminders, response tracking, read receipts, Inbox Pause and meeting scheduling. No mobile apps. | Free-forever Starter plan: first-open and first-click tracking, real-time notifications and email signatures. Sent emails carry a visible Mailbutler watermark. |
| Free trial | 30-day free trial of Boomerang Professional on every new account, no credit card required | 14-day free trial of all features, no credit card required; the account then moves to the free Starter plan |
| macOS | ||
| Windows | ||
| iOS | ||
| Android | ||
| Browser extension | ||
| Made by | Baydin, Inc. (Boomerang) | Mailbutler GmbH |
| Price read from | boomeranggmail.com | mailbutler.io |
| Checked | Oct 5, 2026 | Oct 6, 2026 |
Who each one suits
Boomerang
- Gmail users who want scheduled sending and follow-up reminders
- People who arrange meetings by email rather than a separate tool
- Holding back incoming email to protect blocks of focus time
Mailbutler
- People who want tracking and templates inside Apple Mail, Gmail or Outlook
- Teams sharing an info@ or sales@ inbox without moving to a new mail app
- Mixed teams whose members use different email clients
Worth knowing
Boomerang
- The free Basic plan allows 10 message credits a month, counted across Send Later, reminders, response tracking and read receipts.
- Personal is limited to @gmail.com addresses; Google Workspace accounts need Pro or Premium.
- The iPhone and Android apps are not part of the free Basic plan.
- This entry covers Boomerang for Gmail, a browser extension. Boomerang for Outlook is a separate product with its own subscription.
Mailbutler
- It is an add-on, not a mail client: it runs inside Apple Mail, Gmail in Chrome, Safari or Edge, and Outlook. The iOS and Android apps are companions that need a desktop install.
- The free Starter plan puts a visible Mailbutler watermark on sent emails and covers only basic tracking and signatures.
- The AI Smart Assistant, per-recipient tracking and full open history need the Smart plan at $11 per user / month, billed yearly.
- HubSpot and Salesforce tracking sync, a custom tracking subdomain and IP exclusion are limited to Business. Custom SMTP is listed as coming soon.
Key features
Boomerang
- Send Later
- Write an email now and schedule it to send automatically, choosing the time from a calendar picker or by typing a phrase such as "next Monday".
- Boomerang reminders
- Archives a message and returns it to the inbox at the time you choose, marked unread, starred or placed at the top of the message list.
- Response tracking
- Reminds you to follow up if nobody replies to a sent message within a set time, or regardless. Read receipts and click tracking are also on every plan.
- Meeting scheduling
- Suggest Times, Bookable Schedule, Share Free/Busy and Meeting Poll let guests choose a slot from inside the email. Unlimited meetings need Pro or Premium.
- Inbox Pause
- Stops new email from reaching the inbox until you are ready for it, and can run on a schedule to deliver mail in batches or switch off after work hours.
- Respondable
- An assistant that uses artificial intelligence to help you write clearer, more actionable emails as you type. Its advanced machine learning features need Pro.
Mailbutler
- Email tracking
- Shows when a message was first opened and its links first clicked, with real-time notifications. Full open history, device and location details and per-recipient tracking start at the Smart plan.
- Templates and mail merge
- Message templates with placeholders, and mail merge that fills them from Apple, Google or Outlook contacts, HubSpot, Salesforce or a CSV file. Both start at the Professional plan.
- Inbox collaboration
- On a shared inbox you already have, teammates can assign emails, see who is viewing or replying to a message, and share notes, tasks and color-coded tags.
- Automations
- Rules made of a trigger, optional conditions and actions can tag emails, add notes or tasks and apply signatures when a draft is created, an email is sent or opened, or a link is clicked.
- Smart Assistant
- The AI assistant drafts emails and replies from a few keywords, corrects and rephrases drafts, summarizes messages and finds to-dos in them. It is part of the Smart and Business plans.
- Email signatures
- Signature templates, custom HTML signatures, call-to-action buttons and team sharing are on every plan. UTM link personalization and dynamic content need Business.
Plans
Boomerang
Basic$0
10 message credits a month, with Send Later, reminders, response tracking, read receipts, Respondable, Inbox Pause and meeting scheduling.
Personal$4.98
per month, billed annually (monthly price not shown)
Unlimited message credits, plus the iPhone and Android apps and Notes. For @gmail.com addresses only, not Google Workspace.
Pro$14.98
per month, billed annually ($19.98 billed monthly)
Adds unlimited meetings, recurring messages, and the advanced Respondable, Inbox Pause and Insights features. Works with Google Workspace accounts.
Premium$49.98
per month, billed annually ($59.98 billed monthly)
Adds track by default, premium support, the Boomerang Toolbox, Salesforce/CRM integration and GQueues.
Mailbutler
Starter (free)$0
Basic open and link tracking, real-time notifications and email signatures with team sharing. Sent emails include a visible Mailbutler watermark.
Starter$4
per user / month, billed yearly ($5 billed monthly)
The paid version of Starter with the same feature list. The pricing page attaches the watermark to the free-forever version.
Professional$7
per user / month, billed yearly ($9 billed monthly)
Adds message templates, mail merge, email assignments, collaborator status, shared notes and tasks, tags and automations.
Smart$11
per user / month, billed yearly ($14 billed monthly)
Adds the AI Smart Assistant, full open and click history, device and location details, per-recipient tracking, Smart Follow-ups and Smart Timing.
Business$24
per user / month, billed yearly ($32 billed monthly)
Adds HubSpot and Salesforce tracking sync, a custom tracking subdomain, IP exclusion, UTM link personalization and dynamic signature content.
Ways to pay less
Boomerang
- Annual discount
Up to 25% less with annual billing
Boomerang's team pricing calculator shows Pro at $14.98 a month billed annually against $19.98 billed monthly (25% less) and Premium at $49.98 against $59.98 (17% less).
- Other savings
Group discount for teams of 2 or more
For 2 or more users the team calculator lowers the per-user price to $13.48 a month for Pro and $44.98 for Premium on annual billing, with centralized billing.
- Nonprofit
Nonprofit discount on request
The help center says a discount for nonprofit users is available by emailing support. It cannot be applied through self-service sign-up, and the amount is not published.
- Education
Educational discount on request
The same help article extends the discount to educational users, again arranged through the support team.
Mailbutler
- Annual discount
Up to 25% off with yearly billing
The pricing page advertises up to 25% off for yearly billing: Professional is $7 a user a month against $9 monthly, Smart $11 against $14, and Business $24 against $32.
