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Kaidn
Stop fake accounts before they cost you money
Fraudsters farm signup bonuses using Gmail dot tricks, plus tags, VPNs, and multi-account devices. Kaidn catches them in one API call. Send a signup, login, trial, or cashout and get back allow, review, or block with plain-English reasons. Rules decide, AI explains. Built for rewards sites, affiliates, games, and small fintechs that big fraud vendors ignore. SDK, REST, and MCP server included. Free for 10,000 events/month, no credit card required.
A bit more context on why I built this.
I've been running a rewards site for years, so I've spent a ridiculous amount of time looking at fraud. The frustrating part isn't that the signals don't exist. It's that most fraud tools are either expensive, designed for much larger companies, or give you a score without really telling you what happened.
I wanted something I could actually plug into a small product and understand immediately.
So I built Kaidn around a simple idea:
Don't give me a mysterious fraud score. Show me the evidence.
If someone is signing up from a known Mullvad exit, has already created 4 accounts from the same device, is using a disposable email, and is suddenly creating accounts at 3am from a different country, I want to see those things individually and decide what to do with them.
That's what Kaidn does.
I'm especially interested in hearing from people running rewards, affiliate, gaming, SaaS, or other products where users can extract something valuable for free.
What are you seeing in the wild? What's the fraud pattern that keeps coming back?
About Kaidn on Product Hunt
“Stop fake accounts before they cost you money”
Kaidn was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #160 on the daily leaderboard. Fraudsters farm signup bonuses using Gmail dot tricks, plus tags, VPNs, and multi-account devices. Kaidn catches them in one API call. Send a signup, login, trial, or cashout and get back allow, review, or block with plain-English reasons. Rules decide, AI explains. Built for rewards sites, affiliates, games, and small fintechs that big fraud vendors ignore. SDK, REST, and MCP server included. Free for 10,000 events/month, no credit card required.
On the analytics side, Kaidn competes within API, Artificial Intelligence and Security — topics that collectively have 583.3k followers on Product Hunt. The dashboard above tracks how Kaidn performed against the three products that launched closest to it on the same day.
Who hunted Kaidn?
Kaidn was hunted by Alex Mugo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Kaidn including community comment highlights and product details, visit the product overview.
Alex Mugo