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 (BYOA)

• Actual setup: Same day for Starter/Scale (use existing inboxes); ~5 minutes for Alpha (BYOA Azure setup)
• Infrastructure: Azure enterprise IP pools (Alpha) or import your own (Starter/Scale)
• Pricing:
  • Starter: $39/month (100 imported inboxes, 10K sends)
  • Scale: $79/month (unlimited imported inboxes, 100K sends, API access)
  • Alpha: $249/month (400 Azure ACS inboxes, up to 10M sends, BYOA)
• Verdict: 3-tier approach lets you start with existing inboxes or go zero-warmup with Azure. BYOA model gives you infrastructure ownership.

Why #1: We automated what Hypertide does manually and offer flexible pricing tiers. Start with Starter/Scale using your existing inboxes, or go Alpha with BYOA for zero warmup. Same infrastructure, more options, $6000+ first-year savings vs Hypertide.

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 Cost Reality Check

*ColdSend Alpha total includes ~$2/month Azure cost. BYOA = Bring Your Own Azure account.
*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 zero-warmup with Azure: ColdSend Alpha ($249/month + ~$2 Azure). BYOA model gives you infrastructure ownership with automated setup. Start here, build domain reputation, then migrate to Scale.

For existing warmed-up inboxes: ColdSend Scale ($79/month). Import unlimited Google, Outlook, or SMTP inboxes. Full API access and AI tools included.

For testing the waters: ColdSend Starter ($39/month). Up to 100 imported inboxes. Upgrade to Scale when ready.

For compliance-heavy agencies: Hypertide if you need manual provisioning docs for clients who ask. Be prepared for $1500 setup + $650/month.

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

The honest truth: ColdSend is the only platform with true enterprise IP pools AND a flexible 3-tier pricing model. Hypertide has the infrastructure but lacks pricing flexibility. The difference is automation, bundled sequencer, and choice of entry point.

Migration Strategy We Recommend: Start with Alpha ($249) for zero-warmup Azure ACS. Run campaigns for 1-2 months to build domain reputation. Then migrate to Scale ($79) using your own Google/Outlook inboxes. Total first year: ~$3,900 vs Hypertide's ~$9,300.

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, inflexible pricing, and separate sequencer subscriptions are the problem.

So we automated the provisioning with a BYOA (Bring Your Own Azure) model and built a sequencer that doesn't require a wiki. We also created three pricing tiers so you can start where you are:

• Starter ($39): Already have some Gmail inboxes? Start here.
• Scale ($79): Running an agency with warmed-up inboxes? This is your tier.
• Alpha ($249): Want zero warmup with Azure ACS? BYOA puts you in control.

Same foundation as Hypertide, $6000+ first-year savings, flexible entry points, and you can actually launch campaigns same day. That's it. No magic. Just removing the Enterprise™ tax, sequencer bloat, and pricing inflexibility.

Ready to skip the warmup entirely? ColdSend gets you sending campaigns on day one with 400 Azure ACS inboxes for $249/month (BYOA), or import your existing inboxes starting at $39/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.*