
IPQualityScore
1Lookup
ZeroBounce
Kickbox
NeverBounce
Verify-Email.app
One API call checks the email, phone and IP of every new signup, spots bot waves across your recent signups and tells you: allow, review or block. 250 free checks a month.
LayerStack’s Arm-based cloud virtual machines, powered by cloud-optimized CPU based on Arm architecture that deliver excellent cost-effective processing power, allowing you to easily complete the most demanding application development.
Website, pricing, platforms and company facts side by side.
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In their own words, as submitted to SaaSHub.

SignupVet keeps your free credits and trials for real users, not bots. It is a signup-fraud API for SaaS and AI products that give away free trials or credits. One call checks the email (disposable and typo domains, missing mail servers), the phone number (validity, line type) and the IP (Tor,...
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As answered by people managing SignupVet and LayerStack Arm-based Cloud Server.
SignupVet's answer
SignupVet looks at the whole signup, not one field at a time. One API call checks the email, phone number and IP together and compares the new signup with your recent ones, so it can spot waves: many signups from one IP or network, or generated address series like max1, max2, max3 on the same domain. Every result comes with readable reason codes, so you can see why a signup was flagged.
SignupVet's answer
Choose it if you give away free credits or trials and want one simple check at signup: one call instead of separate email, phone and IP services, a free plan with 250 checks a month and no card, and prepaid packs of 1,000 checks for $15 if you don't want a subscription. Personal data is stored only masked, and logs are deleted after 90 days. It is not a list-cleaning or inbox-verification tool; if that is what you need, a dedicated email verifier is a better fit.
SignupVet's answer
SignupVet started from a simple problem: products with free credits or trials attract fake signups, and every fake account uses the same compute as a real user. We built one API that checks the email, phone and IP of a new signup together and tells you whether to allow, review or block it, with a free plan so small teams can start right away.
SignupVet's answer
Founders and developers of small SaaS and AI products that give away free credits or free trials and lose money when bots or repeat users create fake accounts to use them.
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When comparing SignupVet and LayerStack Arm-based Cloud Server, you can also consider the following products.

IPQualityScore (IPQS) proactively prevents fraud without disrupting the user experience. Access leading fraud prevention tools to detect bots, emulators, VPNs, proxies, stolen user data, and fake users.
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Check phone numbers, emails and IPs through one API: phone validation, HLR, DNC scrubbing, reverse lookup and email verification.
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Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
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Verify your email address lists with our drag and drop interface, or integrate into your app with our API. Prevent fake and bot account sign-ups by confirming your users are real humans with a real email address.
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Real-time email verification and cleaning to ensure emails never bounce.
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1. Prevent Free Trial Abuse – Block disposable email addresses to prevent free trial abuse. 2. Improve Your Email Marketing Campaigns – Detect and remove invalid or non-existent email addresses to improve engagement and reduce bounce rates.
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