Understand Customers + Markets
Do you have product–market fit? Do you know how your customers will actually behave? Is now the right moment to expand? We help you get to clearer answers through fast, deep research that supports smarter decisions now and better ideas going forward.
Proof Of Impact

Annie Selke
Rebuilt the ecommerce experience based on customer behavior.
+0%Increased conversion rate
+0%Incremental revenue
+0%Increased conversion rate
+0%Incremental revenue

PayPal
Helped narrow audience focus and sharpen the story at launch, giving the team a steadier path to growth.
“The insights Part and Sum share are succinct and actionable. We’re grateful we’ve been able to augment our team with Part and Sum’s analysis to include feedback from our guests that drives improvements for our digital experiences.”
Krysti Rede
Director Global Digital Strategy & Product Management
Example Deliverables
We blend qual, quant, and AI-augmented analysis to pressure-test hypotheses faster–delivered through collaborative sessions that turn raw findings into shared conviction.

