Overview — What Each Platform Does
ColdRelay
ColdRelay is cold email infrastructure — it provisions the mailboxes, domains, dedicated IPs, and DNS configuration you need to send outbound email at scale. Pricing starts at $1/mailbox/month with Microsoft 365 on isolated Azure tenants, auto DNS, no warmup wait, and a 99% inbox guarantee. It's the foundation your cold email campaigns run on.
EmailGuard
EmailGuard is a deliverability monitoring and optimization platform — not email infrastructure. It helps you monitor domain health, test inbox placement, check content for spam triggers, verify contacts, and protect against blacklists. Plans range from free (1 domain, 3 accounts) to Agency at $199/month (200 domains, 1,000 accounts). Features include inbox placement testing, spam filter testing, DMARC monitoring, contact verification, domain masking proxies, and blacklist monitoring.
Feature Comparison
| Feature | ColdRelay | EmailGuard |
|---|---|---|
| Primary Function | Email infrastructure — provides the mailboxes, IPs, and DNS to send email | Deliverability monitoring — monitors and optimizes the health of your email infrastructure |
| Mailbox Provisioning | ✓ Creates 100-150 mailboxes per domain with full infrastructure | Does not create mailboxes — monitors existing ones |
| DNS Configuration | ✓ Fully automated SPF, DKIM, DMARC setup | Monitors SPF, DKIM, DMARC compliance — doesn't configure them |
| Inbox Placement Testing | 99% guarantee backed by money-back promise — tested at infrastructure level | ✓ Inbox placement testing included (300-2,000 tests/month depending on plan) |
| Content Spam Checking | Not included — infrastructure focused | ✓ Email content spam checks (500-2,000/month) to catch issues before sending |
| Blacklist Monitoring | IP reputation maintained through dedicated infrastructure | ✓ Automated weekly blacklist monitoring with ad-hoc checks |
| Contact Verification | Not included | ✓ 3,000-50,000 verification credits/month depending on plan |
| Domain Masking Proxies | Not included | ✓ 10-120 domain masking proxies with clean IPs included |
| DMARC Monitoring | DMARC configured automatically at setup | Unlimited DMARC monitoring and insights |
| Dedicated IPs | ✓ Dedicated IPs included with isolated Azure tenants | Dedicated redirect IP available as $100/month add-on |
| Pricing at Base Tier | $1/mailbox — infrastructure cost | $49/month (Pro) for monitoring 100 accounts |
| Warmup | ✓ No warmup required — send from day 1 | Not applicable — monitoring tool, not infrastructure |
Where ColdRelay Wins
ColdRelay solves the foundational problem: you need mailboxes, dedicated IPs, and properly configured DNS to send cold email. Without infrastructure, there's nothing to monitor. ColdRelay's isolated Azure tenants, automated DNS, and dedicated IPs give you a sending foundation that's optimized for deliverability from the start. The 99% inbox guarantee means the infrastructure is designed to work — you shouldn't need extensive monitoring if the foundation is solid.
Where EmailGuard Wins
EmailGuard is excellent at what it does — deliverability monitoring and optimization. Inbox placement testing, spam content checks, blacklist monitoring, contact verification, and DMARC insights are all valuable for maintaining long-term email health. Domain masking proxies and dedicated redirect IPs add extra protection layers. For teams already running cold email campaigns, EmailGuard's monitoring helps catch issues before they become problems. The free plan makes it easy to start monitoring without commitment.
✓ Choose ColdRelay If…
Choose ColdRelay when you need cold email infrastructure — mailboxes, domains, IPs, and DNS. If you're starting from scratch or replacing your current email infrastructure, ColdRelay is what you need first. You can't monitor mailboxes you don't have.
Choose EmailGuard If…
Choose EmailGuard to monitor and optimize your existing email infrastructure. If you already have mailboxes (from ColdRelay or elsewhere) and want to proactively monitor deliverability, test inbox placement, and catch issues early, EmailGuard is the right tool.
The Verdict
ColdRelay and EmailGuard are complementary, not competing products. ColdRelay provides the email infrastructure (mailboxes, IPs, DNS). EmailGuard monitors that infrastructure's health and deliverability. The best cold email operations use both: ColdRelay as the foundation and a monitoring tool like EmailGuard to maintain long-term performance. Think of ColdRelay as building the engine and EmailGuard as the dashboard gauges.
Frequently Asked Questions
Do I need both ColdRelay and EmailGuard?
ColdRelay gives you the sending infrastructure. EmailGuard monitors its health. You definitely need infrastructure (ColdRelay or similar). Monitoring (EmailGuard) is recommended but optional — especially since ColdRelay includes a 99% inbox guarantee.
Does ColdRelay include deliverability monitoring?
ColdRelay focuses on infrastructure quality — dedicated IPs, isolated tenants, and auto DNS — with a 99% inbox guarantee. For detailed monitoring (inbox placement tests, spam checks, blacklist alerts), you'd add a tool like EmailGuard.
Can I use EmailGuard to monitor ColdRelay mailboxes?
Yes. EmailGuard monitors any email account regardless of the infrastructure provider. You can connect your ColdRelay-provisioned mailboxes to EmailGuard for ongoing deliverability monitoring.
Is EmailGuard a replacement for email infrastructure?
No. EmailGuard monitors and optimizes existing email infrastructure — it doesn't create mailboxes or configure DNS. You need an infrastructure provider (like ColdRelay) to have something to monitor.
What's more important — infrastructure or monitoring?
Infrastructure comes first. Quality infrastructure (dedicated IPs, proper DNS, isolated tenants) prevents most deliverability issues. Monitoring helps catch and address issues that slip through. Start with ColdRelay, then add monitoring as you scale.