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โI cannot recommend Slicey enough; These folks are amazing. Whenever we need them they deliver even the most complex and custom projects for us with unmatched inbox stability and very good deliverability. Our own clients are happy about us working with Slicey. The inboxes are always up to standard and communication is top notch. We enjoy working with them on a daily basis.โ


โWe have been using Slicey for two years now. We have not seen performance as well as Slicey's infra, and we've tested at least 4 vendors. Reply rate is now 6%, positive reply rate is 40%. We never had to switch infra which says something on its own...if you're looking to double down on your infrastructure and ramp up which we just did by buying 5000 more inboxes, or if you're looking to diversify vendors, definitely jump onboard with Slicey. Karim will make sure you're well taken care of.โ


โWe have over 14k inboxes with Slicey and have booked hundreds of meetings with them. They have been putting a lot of care and attention into their product and services. Constantly innovating. Overall has been a great experience working with them and I'd highly recommend working with them.โ


โSlicey has always been there for us when deliverability has hit the fan. Reply rates jump once we use their pre-warmed, aged inboxes. They have been a Godsend for us, they always save the day. Slicey's Azure for sure, you won't be disappointed.โ

โWorking with Slicey has been great for our start-up. Karim is a very forward thinking individual and goes above and beyond the cost of the service. We are sending a large number of emails per day and getting interest in our service is improving every day. They are thorough and focused on your success even if that means them repeatedly messaging you to get something to help your business, we are making sales and are making profit in just weeks. Thank you Slicey! Highly recommend!โ

โThe campaign I'm running in bison with Slicey infra is the best performance from a campaign that I've ever seen and I've run thousands of campaigns and sent tens of millions of emails. I don't want to recommend this because i don't want others to know about it.โ

โYou guys are actually insaneโ

How it works
We donโt just sell inboxes. We monitor your deliverability daily and consult you before spam costs you opportunities.
Pick your volume. We build the rest.
- Choose how many prospects a day, and when you want to start
- We handle the domains, SPF, DKIM, DMARC and your sequencer
- Pre-warmed domains send today, new ones after a two-week warmup
Weโre here to help
Anything unclear? Message us on WhatsApp or book a call.
How are we different?
Can I skip warmup?
Why 100 inboxes per domain instead of 3?
What sequencer can I use?
Is this a custom SMTP server?
Do you do custom plans?
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Cold Email Personalization That Actually Gets Replies in 2026
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