Trusted every day by thousands of beginner & professional cold emailers.
Infinite Firepower
Send unlimited emails from one command center
Send too many cold emails from one mailbox and spam filters punish you. To grow, teams had to hire armies of reps—each managing just their own mailbox.
Za-zu ends that. Connect as many mailboxes as you want. Send thousands of emails daily from one command center. No ceilings. No messy handoffs. No extra hires.
Unmatched Deliverability
Every best practice
handled for you
A brilliant cold email is worthless if it lands in spam. And most do—unless you're using Za-zu.
Za-zu warms your mailboxes, shuffles your message variations, and rotates senders the moment deliverability drops—so your emails land where they should, every time.
1:1 Messages At Scale
Write an effective email to every lead
It is not easy to send emails that strangers answer. It is, however, possible.
Za-zu fills in the blanks with AI—so every email feels personal, relevant, and worth replying to.
Add conditional logic like "if they just raised, mention the round" to say the right thing to the right person, every time.
I made my first sale with Za-zu (4 figures!) in only 10 days of sending. Before, I thought I had to know every little thing about cold email deliverability: DNS records, spam filters, warmup sequences, sending limits. Now Za-zu handles all of that for me. I just focus on writing better emails.
Noah Levy, Partnerships Consultant
Za-zu is the best cold outbound platform I've used. Everything is fast, easy to use, and just works. The team's advice and support have been invaluable — we've booked an incredible number of podcasts and brought on a ton of new clients.
Jonathan Garces, Get On A Pod
I run Aurora, a cold email agency managing thousands of mailboxes across dozens of clients. Before Za-zu, I was building automations just to stay on top of deliverability and firefighting mailbox health issues daily. Za-zu does all that natively. We just hit our highest avg positive reply rate ever.
Matt Farah, Aurora
I've studied every major cold email sequencer. SmartLead, Instantly, all of them. Most platforms break at scale or become unusable when managing multiple senders. Za-zu was built right from the ground up: scalable, intuitive, designed for teams doing high-volume outbound. Clay customers ask for it constantly.
Eric Engoron, Clay
Powerful Analytics
Learn from every send with always-on, actionable analytics.
Performance
| Step | Sent | Opens | Replies | Positive Replies | Clicks | Bounce Rate |
|---|---|---|---|---|---|---|
Initial Email | 4,349 | 3,563 | 647 | +11.2% | +7.8% | +1.9% |
First Follow-Up | 2,943 | 2,148 | 234 | +3.1% | +5.6% | +2.9% |
Second Follow-Up | 1,443 | 789 | 118 | -5.1% | -6.3% | -9.9% |