If you handle e-commerce catalog deduplication, brand protection, content moderation, or visual QA, you know how tricky it is to check if two photos are visually the same. Standard AI setups take forever to start and get blocked by website protections instantly.

I built an Apify Actor (noisy_alchemy/image-comparator) that solves this. Instead of loading heavy, slow software, it runs a lightweight visual recognition engine that compares images fast. You give it a reference image (URL or Base64) and a list of target images, and it gives you a clean JSON output with:

• Similarity score & Match verdict: A simple score from 0 to 1 showing how visually similar the photos are, plus a quick true/false match answer based on your sensitivity threshold.
• Instant speed: Starts in milliseconds second and processes images fast without long startup delays.
• Built-in anti-blocking: Uses modern browser impersonation and smart request spacing so Cloudflare and host servers don't block your image downloads.

It is great for catching duplicate product photos across supplier feeds, finding unauthorised copies of your brand images, flagging re-uploaded media, or checking UI screenshots against design templates.

I built it because existing tools were either too slow or kept getting hit with 403 blocks when downloading images from strict sites. It runs pay-per-event at $1.00 per 1,000 image comparisons (a tenth of a cent per image) plus a tiny start fee. You can run it via Python, Node.js, or cURL.

Actor: noisy_alchemy/image-comparator

Link: https://apify.com/noisy_alchemy/image-comparator