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Best Sales Intelligence APIs.

Find prospects and enrich lead lists with real-time B2B contact data and technographic signals. These 37 modules have been vetted for their ability to integrate with AI-native sales stacks.

A

A-Leads

Up-to-date B2B lead generation with a developer-first API.

Beginner-FriendlyFree
A

Adapt

Lead intelligence platform with a massive B2B contact database and API.

TechnicalPaid
A

Apollo.io

The ultimate sales intelligence and engagement platform for AI-native teams.

Paid
A

Argyle

The leading employment data platform for income and employment verification.

TechnicalPaid
B

Bland.ai

AI phone calling API for sales and support automation.

Paid
C

Clay

Creative data enrichment and outbound automation platform.

TechnicalPaid
C

Cognism

Global B2B sales intelligence with premium mobile data.

TechnicalPaid
C

Crawl4AI

Open-source LLM-friendly web crawler and scraper.

Paid
E

Exa.ai

AI-native search engine for finding anything on the web.

Paid
F

Find Me Sales

Lead generation and outreach with built-in AI summaries and webhook support.

Beginner-FriendlyFree
F

Firecrawl

Turn any website into LLM-ready Markdown or structured JSON.

Paid
H

Hunter.io

The standard for finding and verifying professional email addresses.

Paid
I

Inbox

The unified API and MCP server for managing X (Twitter) DMs.

Paid
I

Instantly.ai

Cold email infrastructure and outreach automation at scale.

Beginner-FriendlyPaid
I

Intellizence

AI-powered company intelligence and business signal API.

IntermediatePaid
J

Jebbit

Interactive quiz platform for capturing zero-party consumer data.

IntermediateFree
J

Journey.io

Interactive sales rooms and buyer engagement platform.

IntermediateFree
J

Journy.io

Customer intelligence and product-led growth (PLG) platform.

IntermediateFree
J

JustCall

Cloud phone system for sales and support teams with deep CRM integrations.

IntermediatePaid
K

Kaspr

LinkedIn-first B2B contact data retrieval and prospecting tool.

Beginner-FriendlyFree
K

Kaspr

LinkedIn-first B2B contact data retrieval and prospecting tool.

Beginner-FriendlyFree
K

Katalyz

Collaborative digital sales rooms for B2B engagement.

IntermediateFree
K

Kixie

AI-powered sales dialer and SMS platform for high-velocity teams.

IntermediatePaid
K

Kuration

Enriched prospect databases and data-as-a-service.

Beginner-FriendlyPaid
L

Lusha

Real-time B2B contact and company intelligence API.

Beginner-FriendlyFree
M

Mattermark

Data-driven company insights and lead intelligence platform.

TechnicalPaid
O

Orbitly

Enrich your contact lists with email and social data.

Beginner-FriendlyPaid
O

Outscraper

Extract high-quality business data from Google Maps and beyond.

Beginner-FriendlyFree
P

Perplexity AI

AI-powered research engine with a robust search and agent API.

Beginner-FriendlyPaid
P

PhantomBuster

Automate lead generation and data extraction across any web platform.

TechnicalPaid
P

Prospeo

Email finder and verification API for sales prospecting.

Beginner-FriendlyFree
R

Resend

Modern email API built for developers.

Paid
R

Retell AI

The platform for building high-performance conversational AI voice agents.

Paid
S

Snov.io

Email finder, verifier, and cold outreach automation platform.

Beginner-FriendlyFree
T

Tavily AI

Search engine optimized for AI agents and RAG applications.

Paid
V

Vapi

Developer platform for building voice AI agents.

Free
V

Voyage AI

State-of-the-art embedding and reranking models for RAG.

TechnicalFree