~/CLIRank

Best CRM & Marketing APIs in 2026

CRM platforms, email marketing, advertising, and customer support APIs. Manage the full customer lifecycle.

12 APIs across 7 subcategories

CRM Platform(2)

FreemiumCRM Platform
985k/wk

HubSpot API

CRM, marketing, sales, and service automation APIs.

CLI
9
Quality
8
npm i @hubspot/api-client
PaidCRM Platform
947k/wk

Salesforce API

Access and manage Salesforce CRM data, workflows, and automation.

CLI
7
Quality
8
npm i jsforce

Customer Engagement(1)

PaidCustomer Engagement
304k/wk

Intercom API

Messaging, live chat, help desk, and customer data platform.

CLI
8
Quality
6
npm i intercom-client

Marketing Automation(1)

PaidMarketing Automation
292k/wk

Customer.io API

Automated messaging based on user behaviour and events.

CLI
8
Quality
7
npm i customerio-node

Email Marketing(3)

FreemiumEmail Marketing
170k/wk

Mailchimp API

Email campaigns, audiences, automations, and analytics.

CLI
8
Quality
6
npm i @mailchimp/mailchimp_marketing
FreemiumEmail Marketing
146k/wk

Brevo (Sendinblue) API

Email, SMS, chat, and marketing automation platform.

CLI
8
Quality
7
npm i @getbrevo/brevo
FreemiumEmail Marketing

Twilio SendGrid Marketing

Marketing email campaigns, templates, and contact management.

CLI
8
Quality
4

Customer Support(2)

PaidCustomer Support
154k/wk

Zendesk API

Help desk, ticketing, and customer service automation.

CLI
8
Quality
7
npm i node-zendesk
FreemiumCustomer Support

Freshdesk API

Ticketing, knowledge base, and customer support automation.

CLI
6
Quality
3

Advertising(2)

FreeAdvertising
153k/wk

Google Ads API

Manage Google Ads campaigns, bidding, and reporting.

CLI
6
Quality
7
npm i google-ads-api
FreeAdvertising

Meta Ads API

Create and manage Facebook and Instagram ad campaigns.

CLI
6
Quality
3

Contact Centre(1)

Pay-per-useContact Centre

Twilio Flex

Programmable cloud contact centre platform.

CLI
8
Quality
3

Browse other API categories

AI & Machine Learning

25 APIs · 9 subcategories

Developer Tools

23 APIs · 11 subcategories

Communication

16 APIs · 6 subcategories

Finance & Payments

16 APIs · 8 subcategories

Maps & Geolocation

15 APIs · 7 subcategories

Data & Information

15 APIs · 11 subcategories

Fintech & Banking

14 APIs · 6 subcategories

Payments & Commerce

13 APIs · 6 subcategories

Authentication & Identity

12 APIs · 5 subcategories

Social Media

12 APIs · 7 subcategories

Shipping & Logistics

12 APIs · 6 subcategories

Automation & Integration

12 APIs · 6 subcategories

Cloud & Infrastructure

11 APIs · 6 subcategories

Databases & Backend

10 APIs · 6 subcategories

CRM & Sales

10 APIs · 3 subcategories

Analytics & Monitoring

9 APIs · 5 subcategories

Media & Streaming

9 APIs · 6 subcategories

PDF & Document

8 APIs · 5 subcategories

Translation & NLP

8 APIs · 3 subcategories

Calendar & Scheduling

7 APIs · 2 subcategories

Project Management

7 APIs · 3 subcategories

Video & Media

7 APIs · 5 subcategories

Search & Data

6 APIs · 3 subcategories

Content Management

6 APIs · 3 subcategories

Realtime & WebSockets

6 APIs · 5 subcategories

Forms & Surveys

6 APIs · 2 subcategories

KYC & Identity

6 APIs · 1 subcategories

Feature Flags

6 APIs · 2 subcategories

Queue & Messaging

6 APIs · 6 subcategories

Image Processing

6 APIs · 5 subcategories

Vector Databases

6 APIs · 6 subcategories

Customer Support

6 APIs · 3 subcategories

Logging & Observability

6 APIs · 4 subcategories

Subscription & Billing

6 APIs · 3 subcategories

Travel & Hospitality

5 APIs · 4 subcategories

Push Notifications

5 APIs · 3 subcategories

E-Signatures

5 APIs · 2 subcategories

CDN & Edge

5 APIs · 2 subcategories

DNS

5 APIs · 3 subcategories

Secrets Management

5 APIs · 4 subcategories

Tax & Compliance

5 APIs · 4 subcategories

SEO & Web Analytics

5 APIs · 3 subcategories

Blockchain & Crypto

5 APIs · 4 subcategories

HR & Payroll

5 APIs · 4 subcategories

Weather

4 APIs · 2 subcategories

News & Content

4 APIs · 3 subcategories

Security

3 APIs · 3 subcategories