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PlainKey
Passkey auth for your web app in a few lines of code
PlainKey is a European passkey service built for developers who want to add passkeys without the complexity. You can use it for sign-in, 2FA/MFA, action verification - standalone or alongside your existing auth. It's built with security and a great developer experience in mind. It is free of enterprise bloat. It's just passkeys, plain and simple.
PlainKey started with a realisation in the spring of 2025. Adding passkeys to a web app means either using precious time building your own WebAuthn integration, or signing up for an enterprise auth platform. Those platforms often treat passkeys as one feature among dozens, and they can be costly. That is overkill when passkeys are all you need.
I also wanted to build PlainKey because Europe should have its own answers to tech infrastructure, and not wholly depend on US platforms. PlainKey is built in Norway and runs on servers in Germany, at Hetzner Online GmbH. User data stays in the EU/EEA.
For these reasons, PlainKey doesn't do enterprise features or pricing, and is European-focused to the core. User data is never sold to third parties, and PlainKey will not add features that route authentication through platforms whose business depends on doing that.
While I have some ideas on how to expand beyond passkeys, for now, passkeys are the focus. Whatever comes next will follow the same philosophy.
About PlainKey on Product Hunt
“Passkey auth for your web app in a few lines of code”
PlainKey was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #88 on the daily leaderboard. PlainKey is a European passkey service built for developers who want to add passkeys without the complexity. You can use it for sign-in, 2FA/MFA, action verification - standalone or alongside your existing auth. It's built with security and a great developer experience in mind. It is free of enterprise bloat. It's just passkeys, plain and simple.
On the analytics side, PlainKey competes within SaaS, Developer Tools and Security — topics that collectively have 557.7k followers on Product Hunt. The dashboard above tracks how PlainKey performed against the three products that launched closest to it on the same day.
Who hunted PlainKey?
PlainKey was hunted by Espen Steen. 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 PlainKey including community comment highlights and product details, visit the product overview.
Espen Steen
PlainKey started with a realisation in the spring of 2025. Adding passkeys to a web app means either using precious time building your own WebAuthn integration, or signing up for an enterprise auth platform. Those platforms often treat passkeys as one feature among dozens, and they can be costly. That is overkill when passkeys are all you need.
I also wanted to build PlainKey because Europe should have its own answers to tech infrastructure, and not wholly depend on US platforms. PlainKey is built in Norway and runs on servers in Germany, at Hetzner Online GmbH. User data stays in the EU/EEA.
For these reasons, PlainKey doesn't do enterprise features or pricing, and is European-focused to the core. User data is never sold to third parties, and PlainKey will not add features that route authentication through platforms whose business depends on doing that.
While I have some ideas on how to expand beyond passkeys, for now, passkeys are the focus. Whatever comes next will follow the same philosophy.