CRM APIs

Popular first highlights editorial picks, then ranks providers by monthly downloads of their official SDKs on npm and PyPI (measured 2026-10-18). Others follow A–Z.

Sellsy

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Sensorpro

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SeoToaster

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SimpleChurch CRM

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Simplicate

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SmallBizCRM

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Smarketing Cloud

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Snapforce

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Soffront

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Solve CRM

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SoulCRM

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Spark Membership

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Spiro

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Spotio

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SprinxCRM

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Streak

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Striktly

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SugarCRM 6.2-5

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SugarCRM 7+

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Sugester

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SuiteCRM

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SuperOffice

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SuperOffice CRM

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Surefire CRM

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SwiftCRM

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Talisma

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Tall Emu CRM

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TargetX

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Teamgate

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TeamGram

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Teamleader

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TeamWave

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Teamwork CRM

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Telenotes CRM

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The Fish Tank

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Thryv

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Totango

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TriangleCRM

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TRIBUS CRM

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Trillium

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Tubular

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TurnoverCRM

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UGRU

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Unanet

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UPilot

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UR Important CRM

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vCita

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Veeva

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Counts reflect unique named profiles assigned to this category. Documentation and integration details vary by provider.