LeadJabber is the interface; your gateway is the engine. This separation gives you complete control over your sending infrastructure.
Native API integration with SendGrid and Mailgun
Switch gateways without losing campaign data
Lower costs by paying gateways directly
We handle the list hygiene while your gateway handles the heavy lifting. By combining LeadJabber's processing with the infrastructure of SendGrid or Mailgun, you get the best of both worlds.
Real-time Bounce Processing
We instantly detect failed deliveries and update your status.
Automatic List Cleaning
Bad emails are flagged immediately so you never send to them twice.
Tier-1 Gateway Infrastructure
Leverage the world-class reputation of SendGrid or Mailgun to reach the inbox.
Reputation Safety
Keep your sender score high by automatically filtering invalid leads.
LeadJabber has integrated with Calendly, so you can easily book meetings using your meeting booking sequence.
As soon as a lead wants to meet with you, you can let LeadJabber and Calendly ensure the booking is followed up and scheduled. This feature is a game changer for sellers.


LeadJabber does not use SMTP to send email, but uses a gateway.
We prefer using a gateway for sending emails because it allows us to send large volumes without worrying about the limitations and security risks associated with domain reputation, spam, and delivery issues.