Best AI Image Detectors

How we evaluated these tools

Each tool below was reviewed against its own publicly available product pages, pricing pages, and press materials — never against unverifiable third-party claims or PhotoProof AI's own marketing framing. This page states differences (audience, workflow, privacy, pricing, transparency) rather than a single overall score, because these tools are not interchangeable products competing on one metric. See PhotoProof AI's own Methodology page for how PhotoProof AI's detection process works.

PhotoProof AI

A self-serve web tool for checking a photo or piece of text for AI-generation probability, metadata issues, compression artifacts, and deepfake risk in one report. No account is required for the first checks, and pricing is a public per-credit model with 3 free analyses after registration. Best suited to individuals, journalists, marketplace sellers, and small teams who want a direct answer without integration work or a sales process.

Reality Defender

An enterprise deepfake-detection company built around real-time protection: RealAPI for developer integration, RealCall for voice deepfake detection in call centers, and RealMeeting for live video-call impersonation detection. Offers a free tier of 50 scans/month; paid usage is subscription-based with enterprise contracts for volume. Best suited to organizations protecting live calls and meetings, not individuals checking a single photo.

Hive Moderation

A developer-first content moderation API covering image, video, and text moderation at platform scale. No consumer interface — it's designed to be integrated into an existing product. Offers a free tier of 1,000 API calls/month and pay-as-you-go pricing from $0.001/call, with custom enterprise contracts for high volume. Best suited to engineering teams building moderation into their own platform.

Sensity AI

An enterprise deepfake-detection and identity-verification platform with two custom-priced tiers: a cloud-based Professional tier and an on-premise Enterprise tier with compliance audit trails and SLAs. No published self-serve pricing or free tier — every plan requires contacting sales. Best suited to regulated organizations that need on-premise deployment or compliance documentation.

Winston AI

A text-detection-first AI content and plagiarism detector for educators and publishers, with OCR for scanning PDFs and a secondary AI image detector billed at 300 credits per image scan. Pricing runs from a 14-day free trial through $18–$49/month tiers plus custom plans. Best suited to schools and publishers whose primary need is text/plagiarism checking, with image checking as a secondary feature.

Choosing by use case

If you need a one-off check with no account or contract: PhotoProof AI or Winston AI's free trial.

If you're integrating moderation into your own platform: Hive Moderation.

If you need real-time detection inside live calls or meetings: Reality Defender.

If you need on-premise deployment and compliance audit trails: Sensity AI.

If your primary need is plagiarism and AI-writing detection for text, with image checking secondary: Winston AI.

If your primary need is image authenticity — AI-generation, metadata, deepfake risk — with text checking secondary: PhotoProof AI.

Which AI image detector is the most accurate?

No independent, apples-to-apples accuracy comparison across these tools is currently published — each vendor tests against its own dataset, so head-to-head accuracy claims are not directly comparable. PhotoProof AI publishes its own evaluation framework on its Methodology and Benchmark pages rather than a single unverified accuracy number.

Which of these tools is free?

PhotoProof AI offers 3 free analyses after registration, then per-credit pricing. Reality Defender offers a free tier of 50 scans/month. Hive Moderation offers 1,000 free API calls/month. Winston AI offers a 14-day free trial. Sensity AI has no published free tier.

Which tool is best for a business rather than an individual?

It depends on the business's need: Hive Moderation for platform-scale automated moderation via API, Reality Defender for real-time call/meeting fraud prevention, and Sensity AI for compliance-regulated enterprises needing on-premise deployment. PhotoProof AI and Winston AI are more direct fits for smaller teams doing manual, one-off checks.