antideo.com

What is Antideo?

Antideo is a data-validation service aimed at keeping fake or low-quality signups out of your funnel. It offers APIs and plugins for IP address intelligence (location and reputation), email validation, and phone number validation, plus a WordPress email-validation plugin. The core idea is simple: check who is contacting you before you spend time, money, or sender reputation on them.

What it actually does

• IP health check: detects proxies and checks an IP against known spammer lists, so you can block or flag suspicious visitors to a website or mobile app.
• IP location: returns an approximate location for an IP address.
• Email validation: flags disposable or throwaway addresses before they land on a prospect form.
• Phone validation: checks national and international numbers.

Who it suits

It fits small teams and growing businesses that accept inbound inquiries, signups, or leads and want a cheap, API-first way to filter them. The page cites 240,000+ daily API calls and clients ranging from very small businesses to large enterprises, so the intended range is broad. If you need a fully managed fraud platform with case management and human review, this is a narrower tool.

Practical trade-offs

• You get a free, lifelong account tier (the page states 10 API calls/hour, no credit card), which is enough to test the endpoints but not to run production traffic.
• Paid tiers are priced by request volume: the page lists a Starter plan at USD 5/month with 50 requests/hour and strict limits, and an Enterprise plan at USD 80/month with 2,000 requests/hour and soft limits. Check the current pricing page for the full plan list before committing.
• Validation reduces fake inquiries, but it can also reject legitimate users with privacy tools, VPNs, or shared IPs. Tune thresholds rather than blocking outright.

Next step

If you run a signup or contact form, sign up for the free account and test one endpoint against a week of your real traffic. Compare the flagged addresses and IPs against what you know about those users; that tells you quickly whether the accuracy and rate limits match your volume. For a broader comparison, services such as IPQualityScore and Abstract API cover similar ground, and WordPress.org lists the plugin if you use WordPress.

How can I use Antideo to block fake signups on my website?

Antideo is designed for exactly this job: it gives you API-based checks on the IP address, email address and phone number submitted through your signup form, so you can reject or flag suspicious registrations before they create an account. The site describes four relevant checks — IP location detection, IP reputation against known spammer lists, disposable/throwaway email detection, and phone number validation for national and international numbers.

A practical signup-blocking flow

1. User submits your form. Before creating the account, send the email address to the email validation check. If it's a disposable or throwaway domain, block or require a second verification step.
2. Send the visitor's IP to the IP reputation and IP location checks. Known spammer-listed or proxy/VPN-originating IPs are the ones Antideo says it helps you stop; location data lets you apply your own rules (for example, mismatches between the stated country and the IP's country).
3. If you collect phone numbers, validate the number's format and country before storing it. Antideo advertises coverage of both national and international numbers.
4. Decide per signal: hard-block the clear cases (disposable email, blacklisted IP), and queue the borderline ones for manual review or a CAPTCHA. Blocking purely on a single signal tends to reject legitimate users who happen to be on a shared or VPN IP.

Where it fits and what to weigh

Antideo's own framing is that cleaner prospect lists also protect your domain's email reputation, since you aren't later mailing addresses that bounce or complain. That matters if you run onboarding or marketing email after signup.

Cost and scale

Antideo publishes a free account at 10 API calls/hour with no credit card, a Starter plan at USD 5/month with 50 requests/hour and strict limits, and an Enterprise plan at USD 80/month with 2,000 requests/hour and soft limits. The site states it serves 240,000+ API calls daily and is used by 100+ companies. Check the current pricing page for the full plan list before committing.

Next step: sign up for the free tier and run your own form's last 100 signups through the checks to see your real fake-signup rate. That tells you which plan's hourly limit you actually need — a low-traffic site may never leave the free tier, while a form that draws bot traffic can burn through 50 requests/hour quickly.

If you want to compare the email-validation piece specifically, services such as ZeroBounce and NeverBounce focus on that single job, whereas Antideo bundles IP, email and phone checks behind one API.

What's the difference between Antideo's free and paid plans?

Antideo's free tier is a permanent, low-volume account for testing, while paid plans raise the hourly request ceiling and add capacity for production traffic.

What the page states

• Free account: described as a "life long free account" at 10 API calls/hour, no credit card required.
• Starter: USD 5/month, 50 requests/hour, HTTP and HTTPS, "strict limits."
• Enterprise: USD 80/month, 2,000 requests/hour, HTTP and HTTPS, "soft limits."
• The page also notes a free tier gives "a taste" of IP reputation tracking, email validation and location detection, and that all plans share access to the core feature set (IP location, IP reputation, email validation, phone validation).

Practical differences

What this means in practice

The main trade-off is throughput, not features — the free plan is fine for verifying that the API fits your stack, but 10 calls/hour will be exhausted by even modest form traffic. If you validate every signup, a site receiving more than roughly 10 submissions per hour will start hitting the cap; Starter covers about 50/hour, and Enterprise about 2,000/hour. "Strict" versus "soft" limits matters too: strict limits usually mean hard rejections once you exceed the threshold, while soft limits often allow bursts or overage, which suits spiky traffic such as campaign launches.

Next step

Estimate your peak hourly validation volume (submissions plus any IP reputation checks per visitor), then pick the tier that clears that peak with headroom. If your traffic is spiky rather than constant, the Enterprise "soft limits" wording is the detail worth confirming with Antideo before committing.

For comparison, other providers publish their own free-tier and rate-limit terms, for example IPinfo and Abstract API.

How does Antideo validate email addresses to detect disposable emails?

Antideo detects disposable email addresses by validating the address against curated lists of throwaway and temporary email domains, then returning a result your application can act on. It does not try to prove a mailbox exists by sending mail; it focuses on spotting the domains and patterns associated with disposable inboxes.

The practical flow is:

1. Your form or backend sends the email address to Antideo's email validation API.
2. The API checks the domain against known disposable email providers and related validity signals.
3. Your app receives a result and can block, flag or manually review the signup.

This matters for the audience Antideo targets: lead-gen forms, SaaS signup flows, newsletters and any inbound channel where fake registrations waste sales effort or damage sender reputation. The page explicitly frames the goal as avoiding disposable addresses on prospect forms and keeping your list clean so your domain's email reputation is not hurt later.

A concrete scenario: a prospect enters [email protected] on a demo request form. Instead of accepting the lead and having a sales rep chase it, the form calls Antideo first; if the domain is flagged as disposable, the form can show a message asking for a work email or route the lead to a low-priority queue. The same call can be combined with IP reputation and location checks so a suspicious email plus a proxy IP raises the risk score.

Trade-offs to weigh:

• List-based detection is fast but not exhaustive. New disposable domains appear constantly, so detection quality depends on how fresh and broad the provider's lists are.
• Some legitimate users use aliases. Privacy-focused forwarding services and custom domains can resemble disposable addresses, so a hard block may reject real prospects. A flag-and-review path is often safer than an outright rejection.
• Validation is only one signal. Pairing email checks with IP reputation and phone validation, as Antideo's platform does, gives a stronger fraud picture than email alone.

For a next step, start with the free account to see how the API classifies addresses you already know are disposable versus legitimate, then decide whether to block or flag in production. If you want to compare approaches, Antideo documents its email validation endpoint and free tier directly.

Can Antideo check if a phone number is valid before sending SMS?

Yes. Antideo's page lists Phone Number Validation as one of its core products, alongside IP location and email validation, and describes it as validating "a wide range of both national and international numbers worldwide." That validation step is what you would run before handing a number to an SMS gateway, so a bad or mistyped number doesn't turn into a failed send or a wasted message credit.

What it does and doesn't tell you

• Format and number validity: whether the number is a plausible, correctly structured number for its country — this is the main use case for pre-SMS checks.
• Reachability: a validation API generally cannot confirm a specific handset is switched on or will accept the message. Treat a "valid" result as "worth sending," not "guaranteed delivered."
• Scope: the site claims broad national and international coverage, but exact country coverage and per-number detail aren't specified on the page — check the API docs for your target markets.

A practical flow

1. Collect the number with a country selector, then validate it server-side before the send.
2. Store the normalized result and only queue messages for numbers that pass.
3. Log failures separately so you can prompt users to correct typos rather than silently dropping them.

Choosing between the tiers

The page shows a free account at 10 API calls/hour, a Starter plan at 50 requests/hour, and an Enterprise plan at 2,000 requests/hour, with the paid tiers noted as USD 5 and USD 80 per month respectively. Signup verification is usually bursty — a signup spike can blow through a low hourly cap — so match the tier to your peak signups per hour, not your daily average. Confirm current limits and pricing at Antideo before committing.

If you need a second opinion on number formatting rules by country, Twilio and Numverify document lookup-style validation you can compare against.

How does Antideo determine the reputation of an IP address?

Antideo's IP reputation check works by matching an address against known spammer lists. The page describes validating IPs "against a known list of Spammers housed within various Open Source spammer lists." So the verdict comes from list membership rather than a proprietary scoring model — an IP is flagged if it appears on those open-source lists. The same IP Health Check is positioned to stop proxies from being used by visitors to your website or mobile app.

What that means in practice

• Binary, list-driven results. You get a reputation signal derived from curated spam lists, not a nuanced 0–100 risk score. That's fast and easy to act on, but it won't distinguish a mildly suspicious address from a heavily abused one.
• Best for gatekeeping, not forensics. Use it to reject or challenge signups, form submissions and logins coming from flagged IPs, then route borderline cases to manual review.
• Coverage depends on the lists. Open-source spam lists vary in freshness and scope, so treat a "clean" result as one input among several rather than proof of good intent.

A concrete scenario

You run a SaaS trial signup form and keep getting junk accounts. You call the IP reputation endpoint on each submission, block anything flagged, and combine that with email validation to catch disposable addresses. A flagged IP plus a throwaway email is a strong signal to reject outright; a flagged IP with a corporate email might just be a shared VPN, so you'd send it to review instead.

Next step

Combine IP reputation with the other signals Antideo exposes — IP location, email validation and phone validation — since the page presents them as a suite for cleaning up prospect lists and protecting inbound channels. Start with the free account described on Antideo (10 API calls/hour, no credit card) to see how the reputation results line up with your own traffic before committing to a paid tier.