Best Email Finder Tools with API Access for Developers

Email Finder APIs for Developers

If you are building an application that needs to find business email addresses programmatically, you need a reliable API. Not all email finder tools offer APIs, and among those that do, the quality of documentation, pricing models, and rate limits vary widely. Here are the best options for developers in 2026.

Top Email Finder APIs

1. Easy Email Finder API

Easy Email Finder offers a REST API that lets you search for local businesses by type and location, then retrieve their emails and Google Places data programmatically. The API uses the same pay-per-email pricing at $0.25 per email with no separate API subscription. Authentication uses API keys, and the response includes business name, address, phone, rating, categories, website, and email. Documentation is available at the developer portal with code examples. Rate limits are 60 requests per minute for search and 10 per minute for enrichment.

2. Hunter.io API

Hunter.io has one of the most well-documented APIs in the email finder space. It supports domain search, email finder, email verifier, and email count endpoints. The API is included in all paid plans and the free tier. Rate limits are 10 requests per second. The documentation includes SDKs for Python, Ruby, PHP, Node.js, and Go, making integration straightforward for most tech stacks.

3. Apollo.io API

Apollo.io provides a comprehensive API that covers people search, company search, enrichment, and engagement tracking. The API is available on paid plans starting at $49 per month. Documentation is thorough, and the REST endpoints follow standard conventions. The API is powerful but complex, reflecting the breadth of Apollo's platform.

4. Snov.io API

Snov.io offers an API for email finding, email verification, prospect management, and drip campaign management. The API is available on all paid plans. Rate limits are 60 requests per minute. Documentation covers all endpoints with request and response examples. OAuth 2.0 authentication is used.

5. RocketReach API

RocketReach provides a lookup API for finding emails and phone numbers by person name and company. The API is available on Pro plans and above starting at $107 per month. Bulk lookups are supported, and the documentation includes code examples for Python, Ruby, and JavaScript.

What to Look for in an Email Finder API

• Pricing model: Per-request, per-result, or bundled with subscription?
• Rate limits: Can it handle your expected volume?
• Documentation quality: Are there code examples and SDKs?
• Response format: JSON with consistent schema?
• Error handling: Clear error codes and messages?
• Authentication: API key, OAuth, or both?

API Pricing Comparison

For 1,000 API lookups per month:

• Easy Email Finder: $250 (pay per email, no base fee)
• Hunter.io: $49 per month (includes 500 searches, $99 for 2,500)
• Apollo.io: $49 per month (includes plan credits)
• Snov.io: $39 per month (includes 1,000 credits)
• RocketReach: $107 per month (Pro plan required for API)

Our Recommendation for Developers

For the best documentation and widest range of endpoints, Hunter.io leads the pack. For local business data with Google Places enrichment, Easy Email Finder's API is the only option that provides business ratings, categories, and addresses alongside emails. For the most comprehensive B2B data, Apollo.io's API covers the broadest range of use cases. Choose based on the type of data your application needs.