What is 1Lookup used for?

1Lookup is an API for validating phone numbers, emails and IPs and enriching contact data, billed per lookup. It is a good fit for cleaning contact lists before outreach, fraud checks at signup and giving AI agents lookup tools.

How much does 1Lookup cost?

Paid plans for 1Lookup start at $99 per month, and there is no free plan. A free trial is available.

Is 1Lookup open source?

No. 1Lookup is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Nango, CodeChat and ROAPI.

What are some alternatives to 1Lookup?

1Lookup competes with ZeroBounce, NeverBounce and BillionVerify.

1Lookup: features, pricing and alternatives

About 1Lookup

1Lookup is a commercial API platform for verifying and enriching contact and web data. Developers and AI agents can call it to validate phone numbers, email addresses and IP addresses, and to look up related information such as carrier details, fraud signals and business profiles.

Its catalog is organized into validation, enrichment, social, intelligence and monitoring products. Examples include HLR and carrier lookups, phone spam checks, email append, company firmographics, LinkedIn lookups, SERP and keyword data, website scraping and job-change monitoring.

Usage draws on a shared credit balance, with prices set per lookup, and the homepage advertises a seven-day free trial. The site also offers free browser tools such as an email verifier, DMARC and SPF checkers, an IP lookup and a VIN decoder.

Key features

Phone number validation and carrier lookup
Email verification and enrichment
IP intelligence and proxy detection
Company and LinkedIn profile lookups
Social profile and post lookups
Job change monitoring
Single credit balance across products

Good fit for

→Cleaning contact lists before outreach
→Fraud checks at signup
→Giving AI agents lookup tools

Tags: api; phone-validation; email-verification; data-enrichment; ip-lookup; fraud-detection; lead-data

1Lookup: questions and answers

What is 1Lookup used for?: 1Lookup is an API for validating phone numbers, emails and IPs and enriching contact data, billed per lookup. It is a good fit for cleaning contact lists before outreach, fraud checks at signup and giving AI agents lookup tools.
How much does 1Lookup cost?: Paid plans for 1Lookup start at $99 per month, and there is no free plan. A free trial is available.
Is 1Lookup open source?: No. 1Lookup is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Nango, CodeChat and ROAPI.
What are some alternatives to 1Lookup?: 1Lookup competes with ZeroBounce, NeverBounce and BillionVerify.