Top 10 Cold Email Infrastructure Providers That Skip IP Warmup (2025)

Updated: November, 2025

If you've ever paid $1500 for setup fees or waited three weeks for "warmup," you already know the problem: most cold email infrastructure is stuck in 2018.

We researched 20+ platforms claiming "no warmup" to see which ones actually let you skip IP reputation building — and which are selling warmed Gmail accounts with a fancy dashboard.

Here are the 10 providers that genuinely belong on a no-warmup list, ranked by technical legitimacy, not marketing claims.

Quick Guide: What "No Warmup" Actually Means

True No-IP-Warmup: Uses enterprise IP pools (Azure, AWS) that are pre-warmed and trusted by Gmail/Outlook. You skip IP reputation building but still need domain ramp-up.

Fake No-Warmup: Uses consumer Gmail/Outlook accounts with fast setup. Still on shared consumer IPs that get flagged.

Warmup Tool: Software that helps warmup, doesn't provide infrastructure.

Want to dive deeper into the technical evaluation framework? Read our complete buyer's guide on no-warmup infrastructure to learn how to debug provider claims.

Rankings: Who Actually Delivers

1. ColdSend.pro - Automated Enterprise IPs + Sequencer

• Actual setup: Same day (automated provisioning)
• Infrastructure: Azure enterprise IP pools
• Pricing: $250/month for 1000 inboxes, 100K emails, built-in sequencer
• Verdict: The only platform that bundles enterprise IPs with a usable sequencer at flat pricing

Why #1: We automated what Hypertide does manually and cut the sequencer subscription. Same infrastructure, $6000+ first-year savings.

Technical deep dive: See our detailed infrastructure analysis

2. Hypertide - Manual Enterprise IPs

• Actual setup: 4-6 hours (manual provisioning)
• Infrastructure: Azure enterprise IP pools
• Pricing: $50/month per 100 inboxes + $1500 setup + external sequencer ($150/month)
• Verdict: Legitimate infrastructure, but manual setup and external sequencer add cost

Why #2: Same technical foundation as ColdSend, but 2x the cost at scale. Fine if you need hand-held onboarding.

Technical comparison: See how Hypertide compares to automated alternatives

3. ColdSMTP (GMass) - Single-Address Private SMTP

• Actual setup: Immediate (Chrome extension)
• Infrastructure: Private SMTP server, bypasses Gmail limits
• Pricing: $99/month for unlimited emails from one address
• Verdict: Interesting workaround but catastrophic single-point-of-failure risk

Why #3: Technically a no-warmup solution, but putting all eggs in one basket is reckless for serious volume.

4. PremiumInboxes - Fast Gmail Resale

• Actual setup: <12 hours
• Infrastructure: Resold Google Workspace accounts
• Pricing: $3.50/inbox/month = $3500/month for 1000 inboxes
• Verdict: Ultra-expensive Gmail resale with fast DNS setup

Why #4: You're paying 14x ColdSend's price for warmed Gmail. Unsustainable at scale.

5. Maildoso - Shared SMTP Infrastructure

• Actual setup: 1-2 days
• Infrastructure: Shared IP rotation on their SMTP servers
• Pricing: ~$125/month for 50 inboxes (quarterly billing) + sequencer
• Verdict: Works for <100 inboxes, deliverability tanks at scale

Why #5: Blue-collar option for small volume. Shared IPs become liability at 1000 inboxes.

6. Infraforge - Bare-Metal Dedicated Servers

• Actual setup: 1 week (requires engineering)
• Infrastructure: Dedicated servers with root access
• Pricing: ~$3000/month for 1000 dedicated IPs
• Verdict: Maximum control, requires DevOps team to manage

Why #6: Overkill for 95% of teams. Control is unparalleled but requires expertise.

7. ScaledMail - Bundled Infrastructure Packages

• Actual setup: 4 days
• Infrastructure: Google/Microsoft with "low volume day one" claims
• Pricing: ~$1000/month for high volume
• Verdict: Hedged marketing ("low volume day one" = you still need ramp-up)

Why #7: More expensive than Hypertide with less transparency. "Low volume day one" is code for "you need warmup."

8. Mailscale - Pre-Warmed Inboxes

• Actual setup: Same day (CSV delivery)
• Infrastructure: Pre-warmed Gmail/Outlook accounts on generic domains
• Pricing: Starts at $47/month for 3 inboxes
• Verdict: Rents pre-warmed mailboxes, not true enterprise infrastructure

How it works: They warm up generic domains (like "clientpilot.com") for 2-4 weeks, then rent you ready-to-use inboxes. You skip the warmup period because they already did it.

Limitation: You're on shared consumer IPs (Gmail/Outlook), not enterprise pools. Domain reputation is borrowed, not owned. If their warmup was bad, you're stuck.

Why #8: Technically delivers on "no warmup" promise but with significant reputation risks and borrowed infrastructure.

9. Halon - Enterprise SMTP (Not Built for Cold Email)

• Actual setup: 1-2 weeks (enterprise onboarding)
• Infrastructure: Enterprise-grade SMTP for ISPs and ESPs
• Pricing: Custom enterprise ($5000+/month)
• Verdict: Technically provides no-warmup infrastructure but not designed for cold outreach

What it is: Halon provides the backend SMTP infrastructure that mailbox providers use. They power billions of emails for telcos and hosting companies. You get enterprise IPs with established reputation.

Why it's here: If you can get approved (and afford it), Halon gives you true no-warmup infrastructure. But they explicitly state they are not for cold email—they have no warmup tools, no inbox rotation, no cold email features.

Limitation: Overkill and not designed for your use case. This is like renting a commercial kitchen to make toast.

Why #9: Legitimate enterprise infrastructure with true no-warmup capability, but completely wrong application for cold email outreach.

10. WarmupSMTP / SMTPWire - Bulletproof SMTP

• Actual setup: Immediate to 24 hours
• Infrastructure: Bulletproof SMTP servers in offshore/jurisdictions
• Pricing: ~$50-200/month per server
• Verdict: "No warmup" because they ignore spam complaints and IP reputation

What it is: These providers operate in jurisdictions that ignore spam complaints. They maintain SMTP servers with technically clean IPs by cycling them faster than blacklist authorities can respond.

Why it's sketchy: Mentioned in BlackHatWorld threads as "bulletproof" but deliverability is terrible (spam folder city). They work for volume spam, not legitimate cold email.

Why #10: Technically a "no warmup" infrastructure provider, but not suitable for legitimate business use. Included for completeness, not recommendation.

The 1000 Inbox Cost Reality Check

ColdSMTP's $99 is per single address — 1000 addresses would require enterprise pricing
Mailscale pricing estimated for ~100 inboxes based on $47/month for 3 inboxes
Halon requires enterprise contract — $5000+/month starting point
WarmupSMTP pricing varies by server type and location — estimated for mid-range bulletproof server

Need help choosing the right scale? Use our debugging framework to evaluate any provider.

Our Recommendation

For 1000 inboxes: ColdSend wins on cost and simplicity. You get enterprise IPs, a sequencer, and flat pricing without manual setup fees.

For compliance-heavy agencies: Hypertide if you need manual provisioning docs for clients who ask.

For everyone else: Avoid the bottom 7. They're either warmup tools mislabeled as infrastructure, or overpriced Gmail reselling.

The honest truth: Only ColdSend and Hypertide provide true enterprise IP pools. The difference is automation and bundled sequencer vs manual setup.

Still evaluating options? Learn how to debug any provider's claims before making a decision.

Why We Built ColdSend

We were going to use Hypertide. Then we saw the $1500 setup fee and realized: the infrastructure (Azure IPs) is a commodity. The manual provisioning and sequencer subscriptions are the problem.

So we automated the provisioning and built a sequencer that doesn't require a wiki. Same foundation, $6000+ first-year savings, and you can actually launch campaigns same day.

That's it. No magic. Just removing the Enterprise™ tax and sequencer bloat.

Ready to skip the warmup entirely? ColdSend gets you sending campaigns on day one with 1000 inboxes and 100,000 monthly emails for $250/month.

Need help with your cold email strategy?

• Find your Ideal Customer Profile
• Generate email variations with Spintax
• Build campaigns with our Ops Builder

Still evaluating providers? Use our debugging framework to test any provider's claims.*