Part and Sum is a full-stack growth consultancy that transforms how brands leverage Customer.io to drive meaningful customer engagement and measurable revenue impact.

Ways we support Customer.io clients:

Migration & Implementation Excellence: We seamlessly migrate and implement Customer.io within your existing martech ecosystem, to maximizing platform capabilities from day one.

Customer Activation Strategy: We develop sophisticated lifecycle strategies that see through your customers' eyes, turning insights into action at every touchpoint. Our comprehensive approach combines customer insights, market validation, and behavioral data to create activation programs that deliver results.

Full Lifecycle Marketing Management: As your dedicated lifecycle partner, we manage the complete customer journey, from acquisition through retention and advocacy. Our team acts as a fiduciary for your marketing investments, continuously optimizing campaigns, workflows, and automations to maximize ROI across all channels.

What sets us apart:

We're not just implementers, we're strategic growth partners who combine deep technical expertise with customer-centric thinking. Our integrated approach spans innovation, customer experience, and technology, ensuring your Customer.io investment delivers compounding value over time.