1. Mailtrack
Read receipts and link tracking for Gmail.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Read receipts and link tracking for Gmail.
Best Inbox Zero Cats for Gmail Alternatives in 2026
Inbox Zero Cats for Gmail is a strong option, but it is not the right fit for everyone. Below are 10 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
About Inbox Zero Cats for Gmail
Email elad@mizrahi.cc Non-trader This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer. Privacy Manage extensions and learn how they're being used in your organization Try Chrome Enterprise Core The developer has disclosed that it will not collect or use your data. This developer declares that your data isNot being sold to third parties, outside of the approved use cases Not being used or transferred for purposes that are unrelated to the item's core functionality Not being used or transferred to determine creditworthiness or for lending purposes SupportVisit support hub You might also like… Gmail Move-To-Top Attachment
Comparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Inbox Zero Cats for Gmail (original) | 5.0 | 63 | Free | Adds a random cat to the empty state of Gmail inbox |
| Mailtrack | 4.4 | 3M+ | Freemium | Salespeople and recruiters who need to know when an email was actually opened. |
| HubSpot Sales | — | — | Free | Email tracking, CRM for Gmail, and sales productivity tools in your inbox |
| GMass: Powerful mail merge for Gmail | 4.8 | 400K+ | Freemium | A powerful mass email and mail merge system for Gmail. |
| DocHub - Sign PDF from Gmail | 4.4 | 300K+ | Free | Sign and edit PDF documents |
| Briskine: Email templates for Gmail™ | 4.5 | 100K+ | Free | Write emails faster! Increase your productivity with templates and shortcuts on Gmail™, Outlook, or LinkedIn. |
| Gmail™ Email Templates by cloudHQ | 4.2 | 100K+ | Free | Beautiful email templates for Gmail. Design your templates or import templates from Mailchimp. With team sharing! |
| MailTracker: Email tracker for Gmail | 4.7 | 100K+ | Freemium | Track if your emails are opened & how many times. Be notified when your emails are read with our advanced Email Tracking extension. |
| Streak Email Tracking for Gmail | 4.8 | 70K+ | Free | Know when your email is viewed. |
| FlowCrypt: Encrypt Gmail with PGP | 4.7 | 70K+ | Free | Simple end-to-end encryption to secure email and attachments on Google. |
| Mail Merge for Gmail - Mailmeteor | 4.8 | 60K+ | Freemium | Free mail merge & mass email tool for Gmail, with email tracking and auto follow-ups |
Inbox Zero Cats for Gmail alternatives in detail
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2. HubSpot Sales
Email tracking, CRM for Gmail, and sales productivity tools in your inbox
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Email tracking, CRM for Gmail, and sales productivity tools in your inbox
3. GMass: Powerful mail merge for Gmail
A powerful mass email and mail merge system for Gmail.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: A powerful mass email and mail merge system for Gmail.
4. DocHub - Sign PDF from Gmail
Sign and edit PDF documents
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Sign and edit PDF documents
5. Briskine: Email templates for Gmail™
Write emails faster! Increase your productivity with templates and shortcuts on Gmail™, Outlook, or LinkedIn.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Write emails faster! Increase your productivity with templates and shortcuts on Gmail™, Outlook, or LinkedIn.
6. Gmail™ Email Templates by cloudHQ
Beautiful email templates for Gmail. Design your templates or import templates from Mailchimp. With team sharing!
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Beautiful email templates for Gmail. Design your templates or import templates from Mailchimp. With team sharing!
7. MailTracker: Email tracker for Gmail
Track if your emails are opened & how many times. Be notified when your emails are read with our advanced Email Tracking extension.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Track if your emails are opened & how many times. Be notified when your emails are read with our advanced Email Tracking extension.
8. Streak Email Tracking for Gmail
Know when your email is viewed.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Know when your email is viewed.
9. FlowCrypt: Encrypt Gmail with PGP
Simple end-to-end encryption to secure email and attachments on Google.
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Simple end-to-end encryption to secure email and attachments on Google.
10. Mail Merge for Gmail - Mailmeteor
Free mail merge & mass email tool for Gmail, with email tracking and auto follow-ups
Why it replaces Inbox Zero Cats for Gmail: Covers similar ground in the Email category: Free mail merge & mass email tool for Gmail, with email tracking and auto follow-ups
Compare Inbox Zero Cats for Gmail head-to-head
Direct comparisons with the extensions people weigh against it.
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Frequently asked questions
What is the best alternative to Inbox Zero Cats for Gmail?
Mailtrack is the closest match. Covers similar ground in the Email category: Read receipts and link tracking for Gmail.
Is there a free alternative to Inbox Zero Cats for Gmail?
Yes — HubSpot Sales, DocHub - Sign PDF from Gmail, Briskine: Email templates for Gmail™ are free.