Connect Your Existing Tools
4 email providers, Cal.com & Calendly calendar booking, HubSpot CRM sync, and webhook security built in. Connect via OAuth and keep full control.
1 free agent included. No credit card required.
BYOK
Bring your own API keys
Verified
Cryptographic webhook signing
< 60 Seconds
Gmail setup with one-click OAuth
4 Providers
Gmail, Resend, MailerSend, SendGrid
CRM Sync
Bi-directional HubSpot integration
HubSpot CRM Integration
Bi-directional sync between your Babuger leads and HubSpot contacts. Every AI interaction, status change, and deal update flows automatically to your CRM - zero manual data entry.
HubSpot
Connect your HubSpot account with one-click OAuth. Babuger automatically syncs leads as HubSpot contacts, logs AI email activity to the contact timeline, and creates deals when leads reach the qualified stage. Changes flow both ways - updates in HubSpot sync back to Babuger.
Setup (2 min)
- Go to Settings → Integrations → HubSpot
- Click "Connect HubSpot" and authorize access
- Configure field mapping and sync direction
- Optionally customize status-to-deal-stage mapping
Sync directions
What Syncs
Contact Sync
New leads auto-create HubSpot contacts. Existing contacts matched by email. Field mapping is fully customizable.
Deal Pipeline
Deals created automatically when leads qualify. Stage updates mirror lead status changes in real-time.
Activity Logging
Every AI-sent email logged as an engagement on the HubSpot contact timeline. Full visibility for your sales team.
Inbound Webhooks
Changes in HubSpot sync back to Babuger. Contact updates, new contacts, and deal changes all flow bi-directionally.
Email Providers
Send personalized outreach and receive inbound replies through the email infrastructure you trust. Each provider connects with your agent in minutes.
Gmail
Fastest setup - one-click OAuth
Connect your Gmail or Google Workspace account with a single click. No domain verification, no DNS records, no webhook configuration needed.
Limits: 500 emails/day (consumer), 2,000/day (Google Workspace)
Capabilities
- One-click OAuth 2.0 authentication
- No domain verification or DNS setup required
- Automatic inbound reply detection via Google Pub/Sub
- No webhook configuration - replies arrive automatically
- Built-in deliverability from Google infrastructure
Resend
Modern API, developer-friendly
A modern email API with clean documentation and excellent deliverability. Ideal for teams that want full control over their sending domain.
Limits: Based on your Resend plan
Capabilities
- Developer-friendly REST API with clean SDK
- Domain verification with DNS records (SPF, DKIM, DMARC)
- HMAC SHA-256 webhook signature verification
- Real-time inbound webhooks for reply detection
- React email template support
MailerSend
Great deliverability, generous free tier
High deliverability with a generous free tier - perfect for teams starting with AI outbound who want to test before committing.
Limits: Based on your MailerSend plan
Capabilities
- Generous free tier for getting started
- Domain verification with DNS records
- HMAC SHA-256 signed webhook requests
- Inbound Routes for per-agent email forwarding
- High deliverability out of the box
SendGrid
Enterprise-grade infrastructure
Enterprise-grade email infrastructure trusted by the world's largest companies. Supports dedicated IPs and advanced analytics.
Limits: Based on your SendGrid plan
Capabilities
- Enterprise reliability at scale
- ECDSA P-256 signature verification for webhooks
- Inbound Parse for automatic reply processing
- MX record-based inbound routing
- Dedicated IP support for maximum deliverability
Common Webhook Pattern
All providers follow the same inbound webhook pattern for reply detection:
Calendar & Meeting Booking
AI agents detect buying intent and automatically book meetings - no back-and-forth scheduling emails. Supports both soft-book and hard-book flows.
Cal.com
When a prospect shows interest, the agent fetches your available slots and offers them automatically. When they confirm, the meeting is booked instantly on your calendar with a meeting link and invite.
Setup (1 min)
- Select Cal.com as your calendar provider
- Click "Connect Cal.com" to sign in via OAuth
- Select your event type
- Webhooks are registered automatically
Syncs with your calendar
Booking Flows
Soft Book
Prospect shows interest → Agent offers 1-2 available slots + calendar link → Prospect picks a time
Hard Book
Prospect suggests "Tuesday at 2pm" → Agent books directly if slot is available → Instant confirmation + meeting link
Fallback
Requested slot taken → Agent pivots to closest alternatives → No-guilt "that slot got grabbed" messaging
Reschedule
Prospect asks to move → Agent offers 2-3 new options → Graceful, positive tone
Calendly
Connect your Calendly account via OAuth in one click — no API keys or manual webhook setup needed. The agent fetches your available times and shares your Calendly booking link with prospects. On paid plans (Standard+), the agent also receives booking notifications via webhooks and can book meetings directly.
Setup (1 min)
- Select Calendly as your calendar provider
- Click "Connect Calendly" to sign in via OAuth
- Select your event type
- Webhooks are registered automatically
Paid plan recommended: Free Calendly plans can fetch available times and share your booking link. Webhooks and the Scheduling API require a paid plan (Standard+) for full functionality.
Enterprise-Grade Webhook Security
Every inbound webhook is cryptographically verified before your agent processes it. No exceptions.
Per-Agent Webhook Secrets
Every agent gets unique cryptographic secrets - never shared between agents.
Industry-Standard Signatures
HMAC-SHA256 for MailerSend and Resend, ECDSA P-256 for SendGrid. Every webhook verified before processing.
HTTPS Only
All webhook endpoints require HTTPS. No exceptions, no fallbacks.
Automatic Validation
Signatures are verified automatically on every inbound webhook - invalid requests are rejected immediately.
Security Best Practices
Don't See Your Tool?
We're constantly adding new integrations. Let us know what tools you need and we'll prioritize them.
Set Up in Minutes, Not Months.
Gmail connects in under 60 seconds. API-based providers take 5-10 minutes. Your first campaign can launch the same day.
Get Started Free1 free agent included. No credit card required.