Both are popular cold email tools with unlimited inboxes and warm-up. Here's how they differ on price and features, and when a third option makes more sense.
| Asendify Outbound | Instantly | Smartlead | |
|---|---|---|---|
| Entry price | £29 + 45% fee (£42.05/month) | $47/month (Growth) | $39/month (Base) |
| Mid plan | £79 + 45% fee (£114.55/month) · 100,000 emails | See their plans | $94/month · 90,000 emails |
| Unlimited inboxes | Yes | Yes | Yes |
| Warm-up | Included | Included | Included |
| AI that answers replies | Included on every plan | AI Reply Agent, paid with credits | See their plans |
| Built-in lead database | No (upload or done-for-you) | Yes, via credits | Separate product |
| Done-for-you setup | Yes | No | No |
You want a large built-in lead database next to your sending tool and don't mind buying credits for leads and AI replies. Instantly's warm-up network and integrations are mature.
You're a high-volume sender who wants add-ons like inbox placement testing, dedicated sending servers and mailbox provisioning.
You want the core of both (unlimited inboxes, warm-up, multi-step sequences) with an AI agent that answers interested replies and books the call included on every plan. And if you'd rather not set it up yourself, we can do it for you.
Unlimited inboxes, warm-up and the AI reply agent on every plan, from £29 a month + 45% service fee (£42.05 total). No card needed for the trial. Or let us set up inboxes, domains, copy and lists for you.
Smartlead's entry plan is $39/month and Instantly's Growth plan is $47/month (2026 list prices). Asendify Outbound starts at £29/month + 45% service fee (£42.05 total) with the AI reply agent included.
Instantly sells an AI Reply Agent that uses credits per reply. Asendify Outbound includes an AI reply agent on every plan that answers interested leads and questions from your own offer facts and shares your booking link.
All three support unlimited inboxes. Smartlead is built around agency features; Asendify Outbound is the option with replies handled for you and a done-for-you service.
Asendify Outbound prices are in GBP; competitor prices are their USD list prices from each company's own pricing page, checked in October 2026. Prices change; check their site before you buy. Asendify Outbound is made by Asendify.