Comparison
LayerCall vs Abstract API
Both answer questions about whether a signup is real. Abstract API is a single-purpose API catalogue; LayerCall returns IP, email, phone, domain and device from one request. Which is the better buy depends on how many of those you need to ask about.
What each one is
A catalogue of small, single-purpose APIs — IP geolocation, email validation, phone validation and others — each clean and documented on its own terms.
Their current pricing →One request returns IP, email, phone, domain and device together, on one key and one quota — because the signal that catches a fake signup is usually the relationship between them, and that relationship does not exist inside any single check.
Our pricing →We never quote Abstract API’s prices. Where the table below states a fact about them, it is read from their own public page, linked beside the claim with the date we read it, and dropped if it goes sixty days unchecked. Their pricing is linked above and is always current.
About Abstract API’s side of this page: we describe what kind of product it is, and where we state a fact about it we quote their own public page, link to it, and show the date we read it — and we never quote their prices, which change without notice. Where their pages do not say, we say that rather than guess. Anything current comes from them: Abstract API’s own pricing page. Product names and trademarks belong to their owners; LayerCall is not affiliated with, endorsed by, or partnered with Abstract API.
Point by point
Every row is a point we set out to meet. Ours is checkable on this site; theirs is read from Abstract API’s own public pages, each claim linked to the page it came from and dated. A dash means their pages do not say — which is not a no.
| Point | LayerCall | Abstract API | ||
|---|---|---|---|---|
| Identifiers scored in one request | Yes | IP, email, phone, domain and device — one call, one key, one quota. | No | IP, email and phone, by category (single-purpose API catalogue). Not domain and device. |
| A free tier that needs no card | Yes | 1,000 lookups a month, every endpoint, no card, no daily cap. At the limit it stops rather than billing. | Yes | Free plan: 1,000 IP Geolocation requests a month at 1 request per second, with no credit card required. their page → Checked 3 Sept 2026. |
| Device fingerprinting on every plan | Yes | Included on every plan, the free one too. | Not stated | Not stated on their public pages. Checked 3 Sept 2026. |
| The signals come back with the score | Yes | The signals behind it, and an allow / review / block verdict you tune with strictness. A number alone is unappealable. | Yes | IP Intelligence returns boolean security fields (is_vpn, is_proxy, is_tor, is_hosting, is_relay) rather than a risk score. their page → Checked 3 Sept 2026. |
| A test mode that never bills | Yes | Synthetic data, labelled as such in every response, never billed, never written to the shared network. How it works | Not stated | Not stated on their public pages. Checked 3 Sept 2026. |
| Repeat lookups are not charged | Yes | Cached repeat lookups are free, every response carries billable_lookups, and you set your own spend cap. | Not stated | Calls over the plan's monthly limit are charged a fee per call. No statement found on repeat-lookup pricing, spend caps, or cost in a response. their page → Checked 3 Sept 2026. |
| Accuracy published with sample size and method | Yes | Published with the sample size, the method and the corpus. The figures | No | Email Validation page says accuracy benchmarks are available on request; no figure, sample size or method is published. their page → Checked 3 Sept 2026. |
| Verifies an AI agent's signature | Yes | Verifies an agent’s Web Bot Auth signature and decides what a verified agent may do. Agent endpoints | Not stated | Not stated on their public pages. Checked 3 Sept 2026. |
When Abstract API is the better buy
You need exactly one check and expect to keep needing exactly one. A single-purpose API you can read end to end in an afternoon is a real advantage over a combined score you have to learn.
Weighing more than one option? Every Abstract API alternative we know of, ranked — including the ones that are a closer swap than we are.