CloudMails vs Instantly
Cold email platform comparison. Warmup features, deliverability, scaling, and which platform wins for cold outreach campaigns.
Platform Overview
CloudMails
CloudMails is SMTP infrastructure built for cold email and outreach campaigns. Founded by former AWS engineers, it provides ISP-aware IP rotation, automated warmup, and enterprise-grade deliverability with dedicated IPs included on all plans.
Instantly
Instantly is a cold email platform focused on outbound sales campaigns. It offers warmup services, multiple sending accounts, and campaign management features specifically for sales teams and agencies running outreach at scale.
Feature Comparison
| Feature | CloudMails | Instantly |
|---|---|---|
| Dedicated IPs | Included on all plans | Shared infrastructure (upgrade for dedicated) |
| IP Warmup | Automated ISP-specific schedules | AI warmup included |
| Inbox Rotation | ISP-aware intelligent rotation | Basic rotation between accounts |
| Email Accounts | Bring your own SMTP | Built-in email account management |
| SMTP Access | Full SMTP relay access | Limited to their platform |
| Domain Warmup | Guided DNS + automated verification | Basic warmup |
| Bounce Handling | Auto-classification + retry logic | Basic bounce tracking |
| Scaling | Auto-scaling infrastructure | Plan-based limits |
| API Access | Full REST API | Limited API |
Warmup Features
CloudMails Warmup
ISP-Specific Warmup Schedules
CloudMails uses different warmup schedules for Gmail, Outlook, Yahoo, and other ISPs. Each ISP has different requirements for building sender reputation, and CloudMails adjusts sending patterns accordingly.
Gradual Volume Ramping
IPs follow scientifically-proven ramping schedules that match ISP expectations. Day 1 starts at 25-50 emails, building to 50,000+ emails daily over 4 weeks without triggering spam filters.
Instantly Warmup
AI Warmup Technology
Instantly offers AI-powered warmup that simulates human email interactions. This includes reading emails, opening attachments, and generating engagement signals to build reputation faster.
Account-Based Warmup
Warmup is tied to email accounts rather than IP addresses. This limits control when problems occur and makes migration difficult if needed.
Deliverability Comparison
| Aspect | CloudMails | Instantly |
|---|---|---|
| ISP Monitoring | Real-time ISP response tracking | Account-level tracking |
| Rotation Logic | Bounce threshold + reputation based | Round-robin between accounts |
| Volume Limits | ISP-aware throttling | Per-account limits |
| Blacklist Monitoring | Automatic monitoring + alerts | Manual check required |
| Feedback Loops | Integrated FBL monitoring | Not available |
Pricing
Note: Verify current pricing on official websites.
| Plan | CloudMails | Instantly |
|---|---|---|
| Entry | Custom (starts at volume-based) | $37/month (500 emails/day) |
| Growth | Custom | $74/month (2,000 emails/day) |
| Scale | Custom | $147/month (8,000 emails/day) |
| Unlimited | Custom | $227/month (unlimited) |
| Dedicated IP | Included | Requires plan upgrade |
| Warmup | Included | Included |
Hidden Cost Differences
Instantly: Adding more sending accounts incurs additional monthly costs per account. Dedicated IPs require upgrading to higher plans.
CloudMails: Dedicated IPs included. Warmup included. API access included. No per-account charges.
Use Cases
Choose CloudMails When:
- You need full SMTP control and API access
- Dedicated IPs are required for your use case
- You want to bring your own email infrastructure
- You're running high-volume campaigns (50K+ daily)
- Agency managing multiple clients with separate infrastructure
- You need real-time deliverability monitoring
Choose Instantly When:
- You want all-in-one platform (accounts + warmup + sending)
- You're running smaller outbound campaigns
- You prefer not managing SMTP infrastructure
- AI warmup features are a priority
- Simple campaign management is sufficient
- You're a small sales team with basic needs
Summary
| Category | Winner |
|---|---|
| Infrastructure Control | CloudMails |
| Dedicated IPs | CloudMails |
| API Access | CloudMails |
| AI Warmup | Instantly |
| Ease of Use | Instantly |
| Scaling Capacity | CloudMails |
| Value for Money | CloudMails |