SEON starts at $699 a month for 2,500 fraud checks, and 1Lookup charges $0.025 for a signup checked, with the verdict and the reasons in one call.

Two plans. Starter is $699 a month for 2,500 fraud checks a month (the page also lists 2,500 API calls a month), with 10 users, 50 custom rules, platform and API access, and support by tickets and email. Premium is custom: unlimited API calls, users and rules, case management and AML compliance, a dedicated team and 24/7 support. The page lists no free plan, and overage fees and per-check rates are not published. Checked October 2026.

5 credits per signup checked, billed for every completed check, whatever the verdict. On the Starter plan ($99 a month for 20,000 credits) a check is about $0.025, which covers 4,000 signups a month and is $24.75 per 1,000. At the Enterprise end of the rate card it is about $0.010.

On the printed prices, yes. SEON Starter works out to about $0.28 a check, or $279.60 per 1,000 (arithmetic on $699 for 2,500 checks), against $24.75 per 1,000 on 1Lookup Starter and $9.99 on Enterprise. SEON's pricing page does not say which email, phone or IP checks each plan includes, and its homepage names 1,100+ signals and device data that 1Lookup does not read, so the two prices buy different amounts of analysis.

SEON's homepage describes 1,100+ real-time signals with AI scoring, and shows which signals drove the AI insights score, ranked by impact. 1Lookup returns a verdict (allow, review or block), a 0 to 100 risk score with review from 35 and block from 70, the reasons in plain words, the real inbox behind the address, and a count of the other signups in the last hour that share the IP address, the inbox or the email domain.

The email address, which is required: Gmail dots and +tags collapse to the real inbox, and disposable domains, brand-new domains, domains with no mail server and mailboxes that do not exist are flagged. The IP address, which is optional: data center, VPN, proxy and Tor addresses and public blocklists. The phone number, which is optional: invalid numbers, VoIP numbers and a phone from another country than the IP address. And the signups in the last hour on the same API key that share the IP address, the inbox or the email domain.

On depth. SEON names 1,100+ real-time signals and AI scoring, reads the digital footprint and device signals, and lists 50 custom rules on Starter and unlimited rules on Premium, plus case management and AML compliance, a dedicated team and 24/7 support on Premium. 1Lookup reads the email address, the IP address and the phone number, returns review from a score of 35 and block from 70, and leaves what happens next, and any case handling, to your own app.

The pricing page lists no free plan. A free trial is available by request, and its length and limits are not stated. 1Lookup starts with a 7-day free trial.

Yes. 1Lookup bills 5 credits for every completed check, whatever the verdict, and the price is the same whether you send an email alone or an email, an IP address and a phone number. SEON counts fraud checks against its 2,500 a month plan, and the pricing page prints no rate for checks beyond it.

If you have a fraud team and want device and digital footprint signals, custom rules, case management and a score that shows which signals drove it, SEON is the better fit. If you want one printed price per signup and a verdict with its reasons from a single call that needs only the email, the IP address and the phone number, 1Lookup's Signup Check bills 5 credits for every completed check.

Yes if a fraud team will use its 1,100+ signals, custom rules and case management; its entry plan is $699 a month. If you mainly need to keep throwaway emails, data center IP addresses and repeat signups from using your free credits or trial, compare the per-check price of 1Lookup.