https://pengon.dev/blog/ Notes on contact-form spam, AI classifiers, and running a small Swiss SaaS. Written by the Pengon team. en Tue, 23 Jun 2026 10:00:00 GMT https://pengon.dev/blog/anatomy-of-a-spam-filter/ https://pengon.dev/blog/anatomy-of-a-spam-filter/ Tue, 23 Jun 2026 10:00:00 GMT A €4,500 'business proposal' hit a customer's contact form. Eight of our nine layers correctly let it pass. Here's why only the last one could catch it. engineering https://pengon.dev/blog/recaptcha-didnt-stop-this-spam/ https://pengon.dev/blog/recaptcha-didnt-stop-this-spam/ Tue, 02 Jun 2026 11:01:37 GMT We watched a spam submission sail past Google reCAPTCHA on a live Squarespace form. Here's why — reCAPTCHA judges the sender, never the message. That's the gap. product https://pengon.dev/blog/how-ai-spam-filter-tells-real-from-fake/ https://pengon.dev/blog/how-ai-spam-filter-tells-real-from-fake/ Mon, 01 Jun 2026 09:28:46 GMT Two short messages, both asking for a call, both from strangers. One scored 0.15 (legit). One got blocked. Here's exactly what the model saw — and why specificity is the whole game. engineering https://pengon.dev/blog/cost-of-contact-form-spam/ https://pengon.dev/blog/cost-of-contact-form-spam/ Tue, 26 May 2026 07:58:12 GMT The visible cost of contact-form spam is the time you spend reading it. The invisible cost is the real client whose enquiry got buried. Here's the math. opinion https://pengon.dev/blog/ai-contact-form-spam-patterns/ https://pengon.dev/blog/ai-contact-form-spam-patterns/ Sun, 24 May 2026 08:57:02 GMT AI spam bypasses reCAPTCHA and lands in your Squarespace inbox looking like a warm lead. Here are the 5 patterns we see most — and why filters miss them. spam-patterns https://pengon.dev/blog/stop-squarespace-contact-form-spam/ https://pengon.dev/blog/stop-squarespace-contact-form-spam/ Fri, 22 May 2026 14:50:33 GMT Nearly 28% of web form submissions are spam, and AI now beats reCAPTCHA. Here's why your Squarespace contact form still gets hit, and how to actually stop it. engineering