1Lookup UserCheck

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1Lookup:

About

1Lookup is an enterprise-grade data verification and intelligence platform that gives businesses real-time, high-accuracy validation for phone numbers, email addresses, and IP addresses through a unified API, helping ensure data quality, reduce fraud, and protect user experiences. It aggregates data from authoritative sources, including carrier networks, FCC databases, and global threat feeds, with daily updates to deliver sub-second verification results that detect invalid, risky, or fraudulent identities, improve deliverability, and flag disposable or suspicious contact data. The core services include phone validation with HLR and carrier lookup, phone spam and risk detection, email address validation with SMTP checks and disposable domain screening, and IP intelligence for precise geolocation, proxy/VPN detection, and risk scoring, all accessible via modern REST API calls that scale to millions of daily lookups without rate limits.
UserCheck:

About

UserCheck is a real-time email validation API that detects and blocks disposable, temporary, and suspicious email addresses and domains so tools can focus on genuine users and reduce fake sign-ups and abuse. It verifies whether an email or domain is valid, active, and trustworthy, checks domain reputation, identifies public email providers, relays, role accounts, and offers smart suggestions for common typos, syntax validation, and bulk processing of large lists. UserCheck continuously updates its disposable email database and enhanced validation rules, and it integrates seamlessly via a simple REST API with predictable JSON responses for efficient, low-latency verification workflows. It scales to handle high volumes of requests without performance degradation and offers organizational features like environment separation for development, staging, and production workflows. Additional capabilities include custom blocklists, webhooks, and integrations with tools.
1Lookup:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
UserCheck:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
1Lookup:

Audience

Developers, product teams, and risk/compliance professionals who need an API to validate and verify user phone numbers, email addresses, and IPs in real time to improve data quality, prevent fraud, and reduce risk
UserCheck:

Audience

Developers and businesses that need to ensure only valid, non-disposable email addresses are used for user sign-ups, reducing spam and improving data quality
1Lookup:

Support

Phone Support Not Supported
24/7 Live Support Supported
Online Supported
UserCheck:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
1Lookup:

API

Offers API Supported
UserCheck:

API

Offers API Supported
1Lookup:

Screenshots and Videos

UserCheck:

Screenshots and Videos

1Lookup:

Pricing

$49 per month
Free Version Not Supported
Free Trial Supported
UserCheck:

Pricing

Free
Free Version Supported
Free Trial Supported
1Lookup:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
UserCheck:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
1Lookup:

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Not Supported
UserCheck:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
1Lookup:

Company Information

1Lookup
United States
www.1lookup.io
UserCheck:

Company Information

UserCheck
Founded: 2016
www.usercheck.com
1Lookup:

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1Lookup:

Categories

UserCheck:

Categories

Email Verification Supported
1Lookup:

Integrations

JSON Not Supported
Laravel Not Supported
Laravel Jetstream Not Supported
Make Not Supported
WordPress Not Supported
WordPress VIP Not Supported
Zapier Not Supported
UserCheck:

Integrations

JSON Supported
Laravel Supported
Laravel Jetstream Supported
Make Supported
WordPress Supported
WordPress VIP Supported
Zapier Supported
1Lookup:
Claim 1Lookup and update features and information
Claim 1Lookup and update features and information
UserCheck:
Claim UserCheck and update features and information
Claim UserCheck and update features and information