Platform Comparison
Mailzop vs. Instantly
Why outbound agencies are leaving Instantly's add-on maze for Mailzop's unified engine.
Head to Head
Feature for feature — no spin
Capability
Mailzop
Instantly
Warm-Up Network Type
Compulsory P2P — 100% enforced
Optional add-on (separate subscription)
Email Verification
Native engine — zero API fees
External credits required (Millionverifier etc)
White-Label Client Portals
Included on all tiers with OTP access
High-tier add-on only, no custom CNAME
AI Reply Classification
DeepSeek V4 Pro — 6-stage Kanban
Basic binary classification
India GST Billing
Razorpay + GST Commercial Bill of Supply
International cards only — no GST invoices
Custom Tracking Domains
Up to 20 CTDs on Scale tier
Limited, shared tracking subdomain
Dedicated VPS Relay
Rust relay — Mumbai · SG · DE · US
Shared sending infrastructure
Pricing Model
Flat agency tiers — unlimited warm-up
Per-mailbox fees + warm-up add-ons escalate fast
The bottom line
Instantly charges you separately for warm-up (Warmly), verification (Millionverifier credits), and doesn't offer white-label portals. Mailzop bundles everything — compulsory warm-up, native verification, and OTP client portals — in a flat agency tier. Most agencies save $200–500/mo switching.
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