Spambuster blocks bot submissions on every storefront form — contact, newsletter, reviews, login, even checkout — using Google reCAPTCHA v3 scoring that runs invisibly in the background. Customers aren't interrupted, and the junk stops reaching your inbox.
Spambuster sits between your storefront forms and your inbox, scoring every submission with Google reCAPTCHA before it reaches you.
One click from the Shopify App Store. The setup wizard generates your Google reCAPTCHA keys automatically — no Google account juggling, no API consoles.
Enable "reCAPTCHA Spambuster" under App embeds in your theme editor. Instant protection applies invisible scoring to your contact and newsletter forms in one click — extend it to any other form from the dashboard.
Every submission is scored 0 to 1. Anything under your threshold is stopped before it hits your inbox, and the dashboard shows you exactly what got blocked and why.
Most CAPTCHA apps hand you a form and ask for your Google keys. Spambuster creates the keys itself, watches its own configuration, and never leaves a customer stuck behind a broken spam checker.
There's no Google account to set up and no API key to paste. Spambuster provisions a dedicated reCAPTCHA Enterprise key for your store, with your domains pulled straight from Shopify.
reCAPTCHA v3 scores submissions silently — no checkboxes, no photo puzzles. Pages without a form make zero requests to Google, so your product pages stay exactly as fast as they were.
A nightly check looks for broken keys, deleted keys, missing domains and configuration drift on every store, and fixes what it finds — including domains you added long after install.
Hidden trap fields with randomised names catch crude bots — and show them a fake success page so they stop retrying. A behavioural layer watches for headless browsers, superhuman typing and robotic mouse movement, 25+ signals in all.
Each submission is recorded with its Google risk score, which form it came from, and why it passed or failed. You set the blocking threshold yourself, from 0.1 (lenient) to 0.9 (strict).
If verification can't be reached, the form still submits and the incident is logged for you to review. A spam filter should never be the reason a real customer couldn't sign up or check out.
Both plans start with a 14-day free trial, billed monthly through Shopify. Cancel anytime from inside the app.
Prices in USD · billed monthly through your Shopify invoice · no separate account needed
Install Spambuster, run the two-minute setup, and your forms are protected today — free for the first 14 days.
Install on Shopify — free for 14 days →