Track cold emails in Gmail. Privacy-first: all data stored locally, never sent to external servers. No sign-up required.
Users
2
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#368K
#277K among extensions
Version
1.0.5
updated 16 Jun 2026
Users
monthly, 4 months
Latest, 15 Oct 2026:2 usersMove the mouse over the chart for any month
Ratings count
monthly, 4 months
Latest, 15 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Coldbase
COLDBASE: NEVER FORGET A COLD EMAIL AGAIN
Coldbase helps you remember every cold email pitch you receive in Gmail — who contacted you, when, and how you responded. Built for founders, CEOs, and investors who get dozens of cold emails daily.
✓ 100% LOCAL — Your data never leaves your device
✓ NO SIGN-UP — Works immediately after install
✓ PRIVACY-FIRST — No external APIs, no tracking, no data collection
✓ FREE FOREVER — Core features always free
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WHAT COLDBASE DOES:
• Automatically detects cold emails in your inbox
• Creates a searchable database of all cold outreach
• Tracks your responses (replied, ignored, interested)
• Smart categorization by sender, date, and action
• Quick access via keyboard shortcut (Ctrl+Shift+B)
• Clean, minimal dashboard interface
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WHY COLDBASE?
If you're a founder or executive, you get cold emails constantly:
- Partnership offers
- Investment pitches
- Sales outreach
- Collaboration requests
Most get lost in your inbox. Coldbase ensures you never miss an opportunity because you forgot who reached out.
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PRIVACY GUARANTEE:
Unlike other email tools, Coldbase:
• Never sends data to external servers
• Never tracks your behavior
• Never sells or shares your information
• Processes everything locally in your browser
• Works offline
Your email content stays on YOUR device. Period.
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HOW IT WORKS:
1. Install Coldbase
2. Open Gmail
3. Coldbase automatically detects cold emails
4. View your cold email dashboard anytime with Ctrl+Shift+B
5. Search, filter, and track your responses
No account creation. No configuration. Just install and go.
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FEATURES:
FREE (Forever):
• Unlimited cold email tracking
• Search and filter
• Response tracking
• Email hashing for privacy
• Dashboard view
• Keyboard shortcuts
PREMIUM (Coming July 2026):
• Advanced analytics
• Bulk actions
• Custom categories
• Export data
• Priority support
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PART OF PROMAIL SUITE:
Coldbase works great alone, but it's even better with:
• Commit — Track email commitments and thread costs
• Surely — Reduce email hesitation
All ProMail tools are privacy-first and work 100% locally.
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TECHNICAL DETAILS:
• Manifest V3 compliant
• No external network requests
• Content Security Policy enforced
• Open to security audits
• Minimal permissions required
• Service worker architecture
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PERMISSIONS EXPLAINED:
• storage: Save tracked emails locally
• tabs: Open dashboard
• notifications: Optional reminders
• alarms: Scheduled tasks
• mail.google.com: Read Gmail content (locally only)
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WHO'S IT FOR?
✓ Founders receiving partnership pitches
✓ CEOs managing investor outreach
✓ VCs tracking startup deal flow
✓ Executives with high cold email volume
✓ Anyone who wants email control
═══════════════════════════════
SUPPORT:
Email: support@promailco.com
Instagram: @promailhq
X/Twitter: @promailco
Built with ❄️ for professionals who value privacy.
Growth
Window
Users
Change
Ratings
Rating
7 days
−1
−33.3%
0
0.00
30 days
−1
−33.3%
0
0.00
Chrome Web Store search rankings
Where Coldbase appears when people search the store, with the 30 day change