CallerAPI sells complaints and a spam score from $25 a month, and 1Lookup charges $0.010 for a number reported to the FTC, already counted.

A total_complaints figure, a spam_score from 0 to 100, a reputation label, an is_spam flag and an entity type, plus business details when it has them. The complaints come as a list, each item with the date created, the date of the violation, the consumer's state, the subject, whether it was a recorded message or robocall and the reporter's comment. An optional hlr parameter adds the carrier, the number type, whether the number is ported and the local routing number. Checked October 2026.

Monthly plans sized in lookups: Basic is $25 a month for 5,000 lookups, Premium $99 for 20,000, and Enterprise is $997 pay-per-use for 250,000 or more. Enterprise volume tiers run from $1,000 for about 300,000 lookups (about $3.33 per 1,000) to $25,000 for about 35,000,000 (about $0.71 per 1,000), and the page says exact terms are set in your agreement. The page lists no free plan. Checked October 2026.

2 credits per number with reports, free when the number has no reports. On the Starter plan ($99 a month for 20,000 credits) a number is about $0.010, which covers 10,000 numbers a month and is $9.90 per 1,000. At the Enterprise end of the rate card it is about $0.004.

No. CallerAPI Basic works out to $5.00 per 1,000 lookups and Premium to $4.95, against $9.90 per 1,000 on 1Lookup Starter and $4.00 on Enterprise. Those figures are arithmetic on the printed plans. 1Lookup bills only the numbers that have reports, and CallerAPI's plans are sized in lookups.

CallerAPI returns the complaints one by one with the reporter's comment, a spam score, a reputation label and optional carrier data, and leaves any count by month or share of recorded messages to you. 1Lookup returns the FTC's counts finished: the number of reports, how many said a recorded message or robocall and their share, the subjects with counts, a count for each month, the latest report date, the day the count starts from and the day the data runs to. It returns no individual report and no comment.

1Lookup names its source in every answer: the U.S. Federal Trade Commission's Do Not Call reported calls data, with the day the count starts from. CallerAPI's API reference describes total_complaints as the total number of complaints recorded and names no source and no time window, so this page makes no claim about either. Both inherit the same caveat for reports of this kind: the FTC says none of the information about the reported calls is verified, and caller numbers can be spoofed.

On price per lookup ($5.00 per 1,000 on Basic and about $0.71 at 35,000,000 a month), on detail (the reporter's comment on each complaint, a spam score and a reputation label) and on adjacent data: business details and, with the HLR option, carrier and number type in the same answer. It also sells call blocking and a spam database feed under direct agreements. 1Lookup returns counts for the FTC's reports only.

1Lookup bills nothing for a number the FTC data holds no report for. CallerAPI's plans count lookups, so a request is a lookup against the monthly quota.

If you want the lowest price per lookup, a spam score, the reporters' own comments or carrier data in the same call, CallerAPI is the better fit. If you want the FTC's counts finished, with the months, the recorded-message share and the latest report date added up, and nothing billed for a number with no reports, 1Lookup's Reported Number Check bills 2 credits for every number with reports.

Yes if you want a score and the complaint details with carrier data in one call at a low price per lookup; its entry plan is $25 a month. If you check a few thousand numbers a month and want the FTC's counts by month without adding them up, compare the per-number price of 1Lookup.