Instantly + Underfive
Scale your Instantly campaigns to new heights. AI-powered responses that convert leads into meetings.
How It Works
Watch your cold email replies get handled automatically
Get Started in 4 Steps
Connect Instantly to Underfive in minutes
Add API Key
Connect your Instantly account with your API key
Set Up Webhook
Configure the webhook to receive reply notifications
Configure Agent
Customize your AI response settings
Launch
Start automating your email responses
Important: Unique Credentials Per Workspace
Every workspace in Instantly has a unique API key, and every workspace in Underfive has a unique webhook URL. Add your Instantly API key in Underfive, and add your Underfive webhook URL in Instantly. Without both configured correctly, the AI agent won't be able to process replies.
Configure Your Webhook
The webhook is crucial for Underfive to receive instant notifications when leads reply to your Instantly campaigns. This enables sub-5-minute response times.
- ✓Copy your Underfive webhook URL
- ✓Navigate to Instantly's webhook settings
- ✓Enable "Email Reply" webhook events
Watch the Setup Guide
Follow along with our step-by-step video tutorial to get started with Instantly + Underfive
Powerful Features
Everything you need to scale your cold email campaigns
Unified Inbox
Manage all your Instantly campaigns and replies in one centralized inbox
Instant Replies
AI-generated responses sent within 5 minutes of receiving a reply
Multi-Domain Support
Handle responses across unlimited sending domains seamlessly
Campaign Analytics
Deep insights into reply rates, response times, and conversion metrics
Deliverability Protection
Maintain high deliverability with smart sending patterns
Webhook Integration
Real-time data sync via webhooks for instant response handling
Ready to Scale?
Join thousands of sales teams using Instantly with Underfive