Announcing our $20m Series A.  
Sequence

Invoicing

October 2, 2026

Invoice Failure Alert

Invoice Failure Alert

Whenever an invoice email fails to send, Watchtower fires a tasks and does not mark the rejected email as sent.

Shipped by

Kee Leong Koh

From Inception to IPO

Pay-as-you-go pricing that scales as you grow.

Invoice Failure Alert | Sequence