Updated: March 2026
We tested providers claiming "zero warmup." Most were reselling Gmail or lying about enterprise infrastructure. Here are the 6 that actually deliver pre-warmed IPs.
The "No Warmup" Lie
Every cold email vendor promises you can "start sending immediately." What they don't explain: there's a difference between pre-warmed IPs and skipping reputation building entirely.
IP warmup (solved with the right infrastructure): Gradually increasing volume on a new IP address to prove legitimacy to Gmail. Enterprise pools from Azure and AWS already have 90+ reputation scores. This part is handled for you.
The safety net: With Azure ACS, if an IP ever lands on a blocklist, Microsoft replaces it automatically. If you bought your own dedicated IP and it burned, it is gone forever.
Domain reputation (unavoidable): Gmail still evaluates your specific domain. New domain = unknown = suspicious. You need 1-2 weeks of conservative sending (20-30 emails/inbox/day) while reputation builds. Anyone claiming you can blast 1000 emails on Day 1 is setting you up for blacklisting.
Here's who actually delivers on the first part—and what they cost.
The 6 Worth Considering
For Pre-Warmed IP Enterprise Infrastructure: ColdSend Agency
What you get: Azure Communication Services with BYOA (Bring Your Own Azure). Pre-warmed enterprise IP pools, 200K emails/month, 800 inboxes across 8 domains (2 slots).
Setup: 5 minutes to create Azure account, 5 minutes for automated ACS provisioning.
Cost: $199/month (BYOA) + ~$2/month Azure. Or $299/month DFY (we manage the Azure account).
The catch: 200K base limit. Scale by adding slots at $49/mo each (BYOA) — each slot adds 4 domains, 400 inboxes, and ~100K emails.
Best for: Agencies starting fresh who want pre-warmed IPs and own their infrastructure.
For Pre-Warmed IP Entry Point: ColdSend Growth
What you get: 1 Infra Bundle slot (400 inboxes, 4 domains, pre-warmed IPs) + unlimited imported Google, Outlook, or SMTP inboxes. Full sequencer.
Setup: 5 minutes for Azure ACS (BYOA), immediate for imported accounts.
Cost: $79/month (BYOA) or $99/month (DFY).
Best for: Solo senders and small teams who want pre-warmed IP infrastructure with 100K monthly send capacity.
For API + Team Features: ColdSend Scale
What you get: Same 1 Infra Bundle slot as Growth (400 inboxes, pre-warmed IPs) plus full API + AI tools (MCP, Claude Code), warmup tool, and 4 team seats.
Setup: 5 minutes for Azure ACS, immediate for imported accounts.
Cost: $129/month (BYOA) or $179/month (DFY).
Best for: Teams that need API access, automation, and collaboration on top of pre-warmed IP infrastructure.
For Hand-Held Enterprise Setup: Hypertide
What you get: Same Azure infrastructure as ColdSend Agency, manually provisioned.
Setup: 4-6 hours, $1500 setup fee.
Cost: ~$650/month at 1000 inboxes (including external sequencer).
The catch: You're paying 2.6x for manual work and buying a separate sequencer.
Best for: Compliance documentation requirements or clients who demand white-glove onboarding.
For Single-Address Simplicity: ColdSMTP (GMass)
What you get: Private SMTP server that bypasses Gmail's sending limits from one address.
Setup: Immediate via Chrome extension.
Cost: $99/month.
The catch: One address. If it gets flagged, you're dead. No rotation, no redundancy.
Best for: Small scale, hate managing multiple inboxes, can tolerate catastrophic failure risk.
For Fast Gmail Resale: PremiumInboxes
What you get: Pre-configured Google Workspace accounts delivered in 12 hours.
Setup: Immediate.
Cost: $3.50/inbox/month = $3500/month for 1000 inboxes.
The catch: You're on consumer Gmail IPs, not enterprise pools. Paying 14x ColdSend's price for DNS setup.
Best for: Need 500 inboxes tomorrow, money isn't real, don't care about long-term reputation management.
What Everyone Else Is Selling
Warmup tools (MailReach, Warmup Inbox): Not infrastructure. Software that sends fake emails between accounts. Helpful but doesn't replace enterprise IPs.
Fast resale (Mailscale): Rents you pre-warmed mailboxes on generic domains. You're borrowing reputation, not building it. Risky if their warmup was sloppy.
Bulletproof SMTP (WarmupSMTP, various offshore providers): "No warmup" because they ignore spam complaints entirely. Deliverability is terrible—spam folder city. Not for legitimate business.
Overkill enterprise (Halon): Provides SMTP infrastructure for ISPs and telcos. True pre-warmed IP capability, $5000+/month, not designed for cold email. Like renting a commercial kitchen to make toast.
Cost Breakdown (1000 Inboxes)
*ColdSMTP is per single address. 1000 addresses would require enterprise negotiation.
Why We Built This
We were going to pay Hypertide's $1500 setup fee. Then we realized: Azure IPs are a commodity. The manual provisioning, inflexible pricing, and separate sequencer subscriptions are the problem.
So we automated the provisioning (5 minutes, not 5 days) and built a sequencer that doesn't require a wiki. Three pricing tiers: Growth for pre-warmed IP infrastructure + imported inboxes at $79/mo, Scale adds API and team features at $129/mo, Agency for 2 slots and add-on capacity at $199/mo (all BYOA).
Same foundation as Hypertide. $6000+ first-year savings. Flexible entry points. Campaigns launched same day.
That's it. No magic. Just removing the Enterprise™ tax.
Ready to start? Growth gives you pre-warmed Azure IPs for $79/mo (BYOA), or Agency for 2 slots, 200K sends, and add-on capacity.
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