Syncing Invoice Ninja and Knack is currently on our roadmap
Invoice Ninja is a free, open-source solution for invoicing & billing customers. With Invoice Ninja, users can easily create and send professional invoices from any internet-enabled device. Clients can print invoices or download them as pdf files as well as pay online from within the system.
Knack makes it easy to build your own online database without coding. Anyone can build apps to access data from anywhere, run reports and analytics, and share with your users, employees, or customers. Publish your apps to any website or blog.
PieSync is easy to use and helps you build your business by increasing productivity. Our two-way contact integration will decrease data errors and ensure that you and your team will have access to the most up to date customer information.