Instantly

Instantly is built for one thing: sending cold emails at scale without landing in spam. If your outbound strategy is email-first and you need to send thousands of emails per day across multiple domains, Instantly is purpose-built for that exact use case.

The core value proposition is unlimited sending accounts. You connect as many email accounts as you need, and Instantly rotates between them automatically. This distributes your sending volume across multiple domains and IPs, which is the most effective way to maintain deliverability when operating at high volume. Most competitors charge per account or per inbox, which makes scaling expensive.

The warm-up system is Instantly’s other standout feature. New email accounts are automatically warmed up through a network of real inboxes that send, open, and reply to your warm-up emails. This builds sender reputation before you start sending cold emails, and it continues running alongside your live campaigns to maintain domain health.

Campaign setup is straightforward. You upload a lead list (or connect one through integrations), write your email sequence with A/B test variants, set sending limits, and launch. The unified inbox aggregates replies from all your sending accounts into one view so you can manage responses without checking each inbox individually.

What Instantly does not do is equally important. There is no contact database. You need to source your leads from Apollo, ZoomInfo, or another provider and bring them in as CSV uploads or through integrations. There is no phone dialer, no LinkedIn automation, and no multi-channel sequencing. It is email only.

The Growth plan starts at $30/mo and includes unlimited email accounts, warm-up, and 5,000 active contacts. The Hypergrowth plan at $77.6/mo increases the active contact limit to 25,000. For agencies and teams managing multiple client campaigns, there is a separate pricing tier.

If cold email is your primary outbound channel, Instantly gives you the infrastructure to do it properly.