NudoInfra ALTERNATIVE

Azure inboxes worked in 2024. Here's what works now.

Inboxes built for cold email, watched every day so you can book meetings consistently.

Get your inboxes Free 15-min consult
Who's responsible for your deliverability?
NudoInfra You
You are.

They hand you the tenants, then it's on you to manage the decline as they fade.

On their own
Aerosend Us
We are.

The only provider on the hook for whether you actually land.

On the hook
Trusted by 1000+ B2B Companies
The deliverability ledger

Aerosend vs NudoInfra

The same question, decided row by row. One column owns whether you land.

Feature
Them NudoInfra
Us Aerosend
Who owns your deliverability whether you actually land
You do
We do
Deliverability
On most Azure setups, reply rates tend to drop within a month or two
Consistent, watched every day
Deliverability monitoring
Included
6-metric burn alerts
Warmup
Done-for-you warmup
Premium Warmup
Support
Priority support (Volume plan); standard otherwise
A C-suite exec replies in under 1 hour
Bring your own domains
Yes
Yes, free
Real isolation
Yes, genuine tenant isolation
Yes, isolated every 10 domains

Azure was the best-kept secret in cold email: genuinely isolated tenants, cheap by the month. Then everyone piled in, the space saturated, and on most Azure setups reply rates drop within a month or two. On NudoInfra, managing that decline is your job. With Aerosend, you get dedicated infrastructure built for cold email and a team that owns your deliverability.

Put deliverability on us Free 15-min consult
The custody question

Why teams leave NudoInfra

01
A moment, not a moat

Azure was a moment, not a moat.

Azure tenants were the smartest setup in cold email two years ago: isolated, clean, cheap. Then everyone moved in. The space saturated, and the clean reputation that made Azure work started to fade, often inside the first month or two. NudoInfra can't fix that, because Azure's reputation was never theirs to own. You get handed the tenants and left to ride the decline. Most serious cold emailers have moved off raw Azure inboxes.

02
A tool, not a team

A dashboard that shows you a problem is not the same as a team that catches it before it becomes one.

Most Azure resellers hand you a monitoring dashboard and call that the job done. You still have to open it, read it right, and act in time. By the time a client asks why their reply rate cratered, the answer was already sitting in a tab you never had time to open.

We watch every domain across 6 metrics, around the clock, and reach out before a burn spreads. And we isolate every 10 domains on their own dedicated IP, so one bad domain can't drag the rest down.

03
Ours to own

We own the outcome, not just the setup.

Most providers set you up and vanish. We run your warmup, watch your numbers, rotate your IPs, and get on a call the moment something looks off. You're not buying inboxes. You're buying a team whose only job is making sure you land.

Get a team that owns it Free 15-min consult
The two receipts

Lower all-in cost. Once you count the inboxes you actually need.

Azure inboxes look cheap by the unit. But Microsoft caps each one at 1 to 2 emails a day, so to send real volume you need hundreds of them, plus a setup fee that doesn't come back. Priced by the emails you actually send, Aerosend costs a fraction, then takes 40% off your first 3 months.

NudoInfra To send 600 emails / day
Monthly cost
$75/mo
as of June 2026
Inboxes you need ~300 to 600 (Azure caps at 1 to 2/day)
Setup No setup fee. FAQ: "No. We don't charge setup fees like the $1500 fees seen elsewhere. You only pay for the mailboxes and domains."
Contract No contracts; cancel anytime. "Pay only for what you use. No contracts, no hidden fees." / "Cancel anytime."

Hundreds of capped inboxes, plus a setup fee that doesn't come back.

Lower, all in
Aerosend To send 600 emails / day
Monthly cost
List $120/mo $72/mo AEROSTART 40% off, first 3 months
Inboxes you need ~30 (about 20/day each)
Setup $0
Contract NoneEven
You send the same volume for a fraction of the all-in cost, no setup fee, no contract
Get your inboxes One price. Month to month. Cancel anytime.
The proof

They've tested everyone.
They run Aerosend.

1000+ B2B companies sending
10 providers tested, one picked
2 to 4x more replies after switching

Built by operators who lived your problem. Namit Jindal ran a lead-gen agency sending up to 1.5M cold emails a month and hated every provider he used: shared IPs, zero monitoring, no burn detection. So he built the infrastructure he wished existed, with co-founder Prabhu Rengaswamy, a 20-year infrastructure architect. One's a Smartlead Hall of Famer in the top 1% of cold emailers. The other engineered the isolation and monitoring stack. Operators, not outsiders.

Real operators, real results
0.62% 2.87% reply rate

“Aerosend just works.”

Pranam Lipinski Founder
Under 1% over 4% replies

Now books 2-3 meetings a day.

Conrad James Co-founder, CallPad
Tested 10 providers, picked Aerosend.

One choice after the full field.

Alexan Zartarian Founder, Sparklead
1.31% 2.75% same copy and list

Nothing changed but the inboxes.

Nicolás Kwiatkowski Founder, ZalesMachine
4x the replies

“A vendor that's on your side.”

Arthur Grishkevich Founder, Alchemail
95-99% inbox placement on 250+ inboxes

Placement that holds at scale.

Dan Timelines AI
Hundreds of positive replies a week

Volume of intent, every week.

Grayson Faircloth Founder, Kai & Sonamation
17.4% reply rate (LATAM)

Region-specific, still landing.

Santiago Lopez Founder, Saravá Sales

Individual results reported by named customers; methodology and dates on file (as of June 2026).

Get results like these Free 15-min consult
The honest call

Who should use NudoInfra, and who should use Aerosend.

We will be straight about who each one is for. If one of these reads like you, you already know which way the scale points.

Use NudoInfra if Could be you
  • You're technical and you want to run your own Azure tenants.
  • You send low volume, so the 1-to-2-emails-a-day cap never bites.
  • You already run plenty of inboxes on Aerosend and just want to diversify.

All three are real reasons to use NudoInfra. We would rather you keep what works than change for the sake of it.

Use Aerosend if This is you
  • You want experts running your deliverability while you focus on copy and sending.
  • You're scaling, and managing hundreds of capped Azure inboxes is not how you want to spend your time.
  • You don't want a non-refundable setup fee, or to babysit tenants as they fade.
Tick even one and the scale tips here.
Sounds like you? Start here Not sure? Free 15-min consult
Risk reversal

Here's how much we believe in Aerosend

We built Aerosend to be a more reliable way to land cold email. Test us against anyone you're considering.

The wager

Run both side by side, same copy, same list. If your reply rate isn't higher with us, you get your money back.

Take the wager Free 15-min consult
The last questions

Before you decide?

The five things people ask right before they switch. The short answer to each is on the right. Open any row for the rest.

It was, two years ago. Isolated Azure tenants were the best setup going. Then the space saturated, and on most Azure setups, reply rates tend to drop within a month or two. We run dedicated infrastructure built for cold email and watch it every day, so you're not riding a trend on its way down.

Yes. Smartlead, Instantly, lemlist, Woodpecker, Reply.io, Saleshandy, and anything that connects over IMAP or SMTP. We sit under your sequencer, we don't replace it.

Yes, from any registrar (about $10 to $12 a year). We handle all the DNS for you: SPF, DKIM, DMARC, configured automatically.

Run us next to your current provider on the same copy and list. If your reply rate isn't higher with us, you get your money back.

Domains provision in 24 to 48 hours, warmup runs about three weeks, then you're at full capacity.

Nothing left to stop you. Every answer above is yours, included, with money back if we don't beat your reply rate.
Your deliverability, our job
Start sending cold emails Free 15-min consult
40% off your first 3 months with code AEROSTART
Month-to-month, cancel anytime
Money back if we don't beat your reply rate