1. HubSpot Sales
Email tracking, CRM for Gmail, and sales productivity tools in your inbox
Why it replaces Spectra by BrandCurb: Covers similar ground in the Email category: Email tracking, CRM for Gmail, and sales productivity tools in your inbox
Best Spectra by BrandCurb Alternatives in 2026
Spectra by BrandCurb 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 Spectra by BrandCurb
Bring Your Outbox to Light with Spectra. Privacy-first real-time email tracking for Gmail.
Free
Full reviewComparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Spectra by BrandCurb (original) | — | — | Free | Bring Your Outbox to Light with Spectra. Privacy-first real-time email tracking for Gmail. |
| HubSpot Sales | — | — | Free | Email tracking, CRM for Gmail, and sales productivity tools in your inbox |
| ClickUp: Tasks, Screenshots, Email, Time | — | — | Free | ClickUp is a productivity platform that makes your personal and work lives more productive, saving you time. |
| Export Emails to Sheets by cloudHQ | — | — | Free | Back up, export or parse your Gmail email messages and labels to Google Sheets |
| Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector | 4.7 | 5M+ | Free | Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more! |
| DeepL: translate and write with AI | 4.7 | 4M+ | Free | Translate while you read and write with DeepL Translate, the world’s most accurate translator. |
| Mailtrack | 4.4 | 3M+ | Freemium | Salespeople and recruiters who need to know when an email was actually opened. |
| Google Mail Checker | 4.1 | 2M+ | Free | Displays the number of unread messages in your Google Mail inbox. You can also click the button to open your inbox. |
| Apollo.io: Free B2B Phone Number & Email Finder | — | — | Free | Apollo enables users to find contact info, connect with buyers, track emails, and more for free. |
| Email Finder by ContactOut – Email Lookup Tool | 4.4 | 600K+ | Free | Find emails for 75% of Linkedin or ANY website. Save profiles to CRM. Chatgpt comments & email writer. Trusted by 76% of Fortune500. |
| Fathom AI Note Taker for Google Meet | 4.9 | 500K+ | Free | Records, transcribes & summarizes meetings FREE |
Spectra by BrandCurb alternatives in detail
View Extension
2. ClickUp: Tasks, Screenshots, Email, Time
ClickUp is a productivity platform that makes your personal and work lives more productive, saving you time.
Why it replaces Spectra by BrandCurb: Covers similar ground in the Email category: ClickUp is a productivity platform that makes your personal and work lives more productive, saving you time.
3. Export Emails to Sheets by cloudHQ
Back up, export or parse your Gmail email messages and labels to Google Sheets
Why it replaces Spectra by BrandCurb: Covers similar ground in the Email category: Back up, export or parse your Gmail email messages and labels to Google Sheets
4. Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector
Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more!
Why it replaces Spectra by BrandCurb: Another popular Email extension: Write better emails, essays and messages with Quillbot's Grammar Checker, Paraphrasing Tool, Generative AI, Summarizer and more!
5. DeepL: translate and write with AI
Translate while you read and write with DeepL Translate, the world’s most accurate translator.
Why it replaces Spectra by BrandCurb: Another popular Email extension: Translate while you read and write with DeepL Translate, the world’s most accurate translator.
6. Mailtrack
Read receipts and link tracking for Gmail.
Why it replaces Spectra by BrandCurb: Another popular Email extension: Read receipts and link tracking for Gmail.
7. Google Mail Checker
Displays the number of unread messages in your Google Mail inbox. You can also click the button to open your inbox.
Why it replaces Spectra by BrandCurb: Another popular Email extension: Displays the number of unread messages in your Google Mail inbox. You can also click the button to open your inbox.
8. Apollo.io: Free B2B Phone Number & Email Finder
Apollo enables users to find contact info, connect with buyers, track emails, and more for free.
Why it replaces Spectra by BrandCurb: Another popular Email extension: Apollo enables users to find contact info, connect with buyers, track emails, and more for free.
9. Email Finder by ContactOut – Email Lookup Tool
Find emails for 75% of Linkedin or ANY website. Save profiles to CRM. Chatgpt comments & email writer. Trusted by 76% of Fortune500.
Why it replaces Spectra by BrandCurb: Another popular Email extension: Find emails for 75% of Linkedin or ANY website. Save profiles to CRM. Chatgpt comments & email writer. Trusted by 76% of Fortune500.
10. Fathom AI Note Taker for Google Meet
Records, transcribes & summarizes meetings FREE
Why it replaces Spectra by BrandCurb: Another popular Email extension: Records, transcribes & summarizes meetings FREE
Compare Spectra by BrandCurb head-to-head
Direct comparisons with the extensions people weigh against it.
Explore further
Frequently asked questions
What is the best alternative to Spectra by BrandCurb?
HubSpot Sales is the closest match. Covers similar ground in the Email category: Email tracking, CRM for Gmail, and sales productivity tools in your inbox
Is there a free alternative to Spectra by BrandCurb?
Yes — HubSpot Sales, ClickUp: Tasks, Screenshots, Email, Time, Export Emails to Sheets by cloudHQ are free.