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InstantlyFind & Win Customers

STOA rating

6.2 / 10

Openness

OPENNESS 4/10API 2/3 · Export 0/3 · Contract 0/2 · Integrations 2/2

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Instantly documents a public API v2 that needs a workspace and an API key, and the docs do not state which paid plans include API access. developer.instantly.ai, checked 7 Oct 2026 (opens in a new tab)

Connections

Zapier lists an Instantly integration that triggers on workspace activity like sent emails, replies, bounces and unsubscribes. zapier.com, checked 7 Oct 2026 (opens in a new tab)

Instantly runs its own integrations marketplace where technology partners list integrations built on its API. instantly.ai, checked 7 Oct 2026 (opens in a new tab)

What it does

Instantly lets sales teams and agencies send cold email campaigns at scale by connecting multiple email accounts, automating warmup, and tracking performance in one place.

Strengths

Unlimited email account connections on paid plans
Automated email warmup to protect sender reputation
Built-in lead database for finding prospects
Easy-to-use campaign builder for cold outreach sequences
Strong deliverability tools compared to general email platforms

Weaknesses

Only useful if cold email is a core part of your sales process
No free plan — you must pay to use it
CRM features are basic compared to dedicated CRM tools
Can get expensive as you scale up contacts and sending volume

Key features

Send cold email campaigns to prospects at scale
Connect and rotate multiple email accounts to improve deliverability
Automatically warm up new email accounts to avoid spam filters
Search and build lead lists using the built-in prospect database
Track opens, replies, and campaign performance in one dashboard
Use AI to write and personalize email sequences faster

AI features

Instantly uses AI to help you write and personalize cold email sequences, and its inbox rotation and warmup system uses machine learning to improve email deliverability over time. It also offers AI-assisted reply categorization so you can quickly spot interested leads.

STOA verdict

Instantly is a great fit for small businesses that rely on cold email outreach to find new customers — think agencies, consultants, and B2B service providers. The ability to connect unlimited email accounts and warm them up automatically is a huge advantage that helps you reach more inboxes without getting flagged as spam. The main downside is that it's built specifically for cold outreach, so if that's not your main sales channel, you won't get much use out of it.