Both Instantly and Smartlead allow unlimited sending accounts and automated warmup. However, key differences in agency features, warmup network topology, and CRM integrations dictate which one fits your outreach stack.
Choose Instantly if you want an intuitive all-in-one UI with a built-in B2B lead finder database. Choose Smartlead if you are an agency managing multiple client sub-accounts or require advanced API/webhook infrastructure.
Best for growth teams, founders, and sales teams seeking built-in lead search + outreach.
Best for outbound agencies, enterprise teams, and technical power users needing sub-accounts.
| Feature | Instantly | Smartlead |
|---|---|---|
| Warmup Accounts | Unlimited | Unlimited |
| Lead Database Included | Yes (Instantly Leads add-on) | No (External list import required) |
| Agency Sub-Accounts | Available on higher tiers | Native client isolation on all plans |
| API & Webhook Access | Available on Pro plans | Full API support across all tiers |
| Starting Price | $37 / month | $39 / month |