Best Nonprofit Check Plus Alternatives (2026)

11 Data Validation APIs you can use instead of Nonprofit Check Plus. Compared by auth type, HTTPS support, and CORS compatibility.

Looking for alternatives to

Verify charities via EIN using IRS, PUB78, BMF & OFAC data for compliance and legitimacy

All Alternatives to Nonprofit Check Plus

11 APIs

Official French address validation service

Connection for brevo CRM suite

US Address Verification

Test api server to receive and return value from HTTP method

Content validator against profanity & obscenity

Enter address data quickly with real-time address suggestions

Extract postal addresses from any text including emails

Validate and append data for any US postal address

This API validates postal codes within UK

VAT Number Validation & Lookup REST API

VAT number validation

Featured APIs appear first in alternatives pages, category rankings, and the homepage. Launch partner rate: $29/mo.