Contact Form

Illustration comparing WordPress contact form plugins for lead tracking and attribution reliability

Best WordPress Contact Form Plugins for Lead Tracking: I Audited 12 Form Builders

By Haktan Suren, PhD

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Mar 30th, 2026

I audited 12 WordPress form builders for lead tracking, hidden fields, multi-form behavior, caching tolerance, and data quality. Here is the ranking an...

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HandL UTM Grabber / Tracker: Integrations

By Haktan Suren, PhD

102 Comments

Apr 10th, 2016

HandL UTM Grabber / Tracker is a unique WordPress plugin for storing, tracking and using UTM variables on any pages, posts and custom posts with ease. ...

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Bioinformatics

Installing R package from the source

Installing R package: Fixing package ‘xxx’ is not available (for R version x.y.z ...

Building a BLAST database with local sequences : makeblastdb