Syncing Invoice Ninja and eSputnik 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.
eSputnik is the Optical Marketing Marketing System for B2C:
improves conversion of your marketing campaigns
generates repeat sales
increases profitability of attracted customers
maximizes customer lifetime value
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.