Comparison
LayerCall vs ZeroBounce
Both answer questions about whether a signup is real. ZeroBounce is an email deliverability platform; 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
Email deliverability first: list validation, inbox placement testing and blacklist monitoring, aimed at people responsible for whether a campaign lands.
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 ZeroBounce’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 ZeroBounce’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: ZeroBounce’s own pricing page. Product names and trademarks belong to their owners; LayerCall is not affiliated with, endorsed by, or partnered with ZeroBounce.
Point by point
Every row is a point we set out to meet. Ours is checkable on this site; theirs is read from ZeroBounce’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 | ZeroBounce | ||
|---|---|---|---|---|
| Identifiers scored in one request | Yes | IP, email, phone, domain and device — one call, one key, one quota. | No | email, by category (email deliverability platform). Not IP, phone, domain and device. |
| Cross-signal linkage | Yes | A device that reappears on a new email and IP is linked, and the link is in the score. | No | Not possible from a single-identifier check: there is no second signal to link email to. |
| 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. | Not stated | 100 free validations/month with a business/premium email domain; credits don't expire; no card requirement stated. 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 | Validate returns status plus sub_status reasons, not a score; an optional verify_plus parameter runs a stricter check. 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 | Yes | Sandbox Mode supplies test email addresses so the validate API can be exercised without consuming real credits. their page → 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 | The API never consumes a credit for an unknown result; no repeat-lookup discount, spend cap, or cost-in-response field is stated. 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 | Yes | Publishes a July 2026 benchmark: 98.0% accuracy against 8 tools on the same 9,901 addresses, with the method described. 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 | No | Flags an ai_agent_mailbox sub_status for AI-managed inboxes; this is not Web Bot Auth or agent authentication. their page → Checked 3 Sept 2026. |
When ZeroBounce is the better buy
The job is protecting a sending reputation rather than judging a signup. Inbox placement and blacklist monitoring are real deliverability work that we do not do at all.
Weighing more than one option? Every ZeroBounce alternative we know of, ranked — including the ones that are a closer swap than we are.