The request asks what to use for "segmentation", which is ambiguous: it could mean customer or contact segmentation for marketing, or user segmentation in analytics. The products below are those whose sources show audience or segment-building functions; Braze and SendGrid list segment endpoints directly, while HubSpot and Mixpanel describe targeting and analytics features. Please clarify the platform or constraint if you need a more specific pick.

A question back: Do you mean customer or contact segmentation for marketing, or user segmentation for product analytics, and which platform are you on?

1. 1

   Braze Customer Engagement Platformbraze.comverified and signed

   Builds customer segments from real-time data and acts on them across channels, with segment analytics and segment list endpoints 2.

   WebsiteDocsPricingGet started

   official:API · Braze Endpoints

   for agents: segmentAnalytics · segmentList · segmentDetails

2. 2

   SendGrid Email APIsendgrid.comverified and signed

   Creates and retrieves contact and marketing segments through its segment endpoints for targeted email sending 1.

   WebsiteGet started

   official:API · Email Activity (beta)+12 community tools built for it

   for agents: POST_contactdb-segments · GET_marketing-segments · GET_contactdb-segments-segment_id

3. 3

   HubSpothubspot.comverified and signed

   Builds targeted contact segments by filtering on lifecycle, engagement, job title, geography, or firmographics 5.

   WebsiteDocsPricingGet started

   +58 community tools built for it

   for agents: custom_api_call · audience-targeting · customer-retention

4. 4

   Mixpanelmixpanel.comverified and signed

   Analyzes user behavior with fast queries to segment and spot behavioral patterns in product analytics 7.

   WebsiteDocsPricingGet started

   +7 community tools built for it

   for agents: custom_api_call · analytics · track_event