Friday, November 6, 2026 · Customer reviews of US businesses
The Fair Hearing score
Excellent
11 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Koldmail provides scalable email infrastructure for businesses and outbound teams. We specialize in Google Workspace and Microsoft Outlook inboxes, offering reliable infrastructure, competitive pricing, and hands-on support built for teams operating at scale. Managing over 2,000,000 email accounts.
Koldmail.io (koldmail.io) has 11 customer reviews on The Fair Hearing, with an average rating of 5.0 out of 5.
11 approved reviews, newest moderated first
I had a great experience working with this company. From start to finish, the team was professional, reliable, and very easy to communicate with. They were responsive to any questions or concerns and made sure everything was handled properly and on time.
By Almer C.
The care for the customer is the best with them, I'll always get my questions answered and things done without any issues. Highly recommend!
By Rokas from B.
Brandon has been phenomenal servicing us and helping us get setup correctly and pick the best product for our business!! I've been with three different mailbox providers and Koldmail.io is by far the best, hands down and would recommend them to anyone serious about cold emailing!!
By Ed S.
Amazing team, super responsive and I was able to send massive amounts of emails just like I wanted. Great and humble guys that’ll support you all along the way. Would highly recommend, don’t go with anyone else.
By Ethan I.
Koldmail made our cold email infrastructure painless. Setup was fast, inboxes were warmed and ready without us babysitting anything, and deliverability has been consistently strong across our campaigns. When we had questions, support got back to us quickly with real answers. If you're running outbound at any scale, this is the backend you want. Highly recommend.
By David T.
What truly sets Koldmail apart is their sophisticated approach to high-volume cold outreach frameworks. They effectively leveraged data enrichment tools like Apollo and Clay to build our pipeline, allowing for hyper-targeted, signal-based prospecting. The outbound messaging scripts they drafted were far from standard, run-of-the-mill templates; they were carefully crafted to trigger real buying intent and drive conversations
By Razi J.
Great guys, love the support.
By Jiten K.
Been using Koldmail.io for a few months and no complaints. Deliverability has stayed solid, they clearly keep up with the latest deliverability updates instead of leaving you to figure it out yourself. Support's been quick too, actual answers, not canned responses. Would recommend if you're doing cold email and want a provider that's on top of things.
By Pranav B.
