SONAR invisibly tracks every email you send from Gmail. Real-time alerts the instant someone opens your message. No more guessing.
Every day, millions of important emails vanish into the void. And you're left wondering.
You sent the pitch deck three days ago. Should you follow up — or wait? Without knowing if they even opened it, every move is a guess.
Critical emails go out. Nothing comes back. Was it received? Ignored? Lost in spam? The silence tells you nothing.
Timing is everything in email. But without data, you're sending blind — morning, afternoon, evening — it's all a coin flip.
Your team sends hundreds of emails a week. How many were opened? Which clients engaged? You have absolutely no idea.
What if you could know?
Three powerful capabilities that transform how you communicate.
The moment someone opens your email, you know. Not hours later. Not the next day. Instantly.
Desktop alerts arrive the second your email is read. Strike while the iron is hot. The second.
Wake up to a complete picture of yesterday's email activity. Who opened. When. How many times. Complete picture.
Add the extension. Open Gmail. You're tracking. No configuration, no onboarding calls, no IT department needed.
We don't read, store, or sell your email content. ISO 27001 certified. Built by a company that takes data seriously.
Pro starts at $5/mo. That's less than most competitors charge for their free-tier upgrade. Same tracking power, real price.
The tools you already use. One-click install, zero disruption to your workflow. Desktop notifications keep you informed.
The same email intelligence tools charge $10–$130/mo. We don't think that's necessary.
| Feature | SONAR Pro | Mailtrack | Streak | Mixmax | Yesware |
|---|---|---|---|---|---|
| Price | $5/mo | $5.99/mo | $49/mo | $29/mo | $15/mo |
| Email open tracking | ✅ | ✅ | ✅ | ✅ | ✅ |
| Link click tracking | ✅ | ✅ | ✅ | ✅ | ✅ |
| Remove branding | ✅ | Paid only | ✅ | ✅ | ✅ |
| No data selling | ✅ | ❌ | ❌ | ❌ | ❌ |
| Setup time | <30 sec | 2 min | 5 min | 10 min | 10 min |
| Annual plan | $49/yr | $120/yr | $588/yr | $348/yr | $180/yr |
Same features. Fraction of the price. Your data stays private.
ISO 27001 certified. We never read your emails or share your data with third parties. Ever.
One-click install. Zero learning curve.
No extra steps. Send email as usual.
Accurate, precise, and reliable tracking.
Free tier available forever.
No complex setup. No learning curve. You'll be tracking in under 60 seconds.
Add SONAR to Chrome in one click. No complex setup. No IT department needed.
Write emails exactly as you always do. SONAR works invisibly in the background.
Get instant alerts when emails are opened. Make informed decisions, every time.
Start free. Upgrade when you need more.
$ billed annually
Everything you need to start tracking.
$49 billed annually
Everything you need. Less than a coffee.
$89 billed annually
Full visibility into every interaction.
2,000,000+ emails tracked and counting.
"I used to guess when to follow up on proposals. Now I know the exact moment a client opens my email. Closed 3 deals last month just from better timing."
"We were paying $50/mo for Streak just to see if investors opened our deck. SONAR does the same thing for $5. No brainer."
"My follow-up game completely changed. I get a ping the second a prospect opens my email — I call within minutes. My close rate is up 40%."
"Recruiting is all about timing. Knowing when a candidate reads my offer letter means I can reach out at exactly the right moment."
"We manage 30+ client accounts. SONAR's team plan lets us track every email across the agency without breaking the budget."
Join thousands of professionals who never wonder if their emails were read.
Add to Chrome — Free