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Freemium

Sightengine

Content moderation API covering images, video, live streams, text, audio and even QR codes, with 120+ image moderation classes.

4.0 Security & Compliance AI
4.0 Very good 4.0
Covers formats most moderation vendors leave gaps in, including QR codes Classifiers produce false positives and negatives at any threshold
Reviewed by Challenging Voice Editorial · Updated Sep 2026 How we rate
PricingFree
Free planYes
CompanySightengine
PlatformsWeb
CategorySecurity & Compliance AI
Last reviewedSep 2026

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Overview

Sightengine is a content moderation API spanning every format user-generated content actually arrives in: images with 120+ moderation classes, video and live streams, text, audio with profanity detection, and OCR plus QR code moderation.

The breadth is the point, because moderation gaps get found and exploited fast. A platform that screens images but not the text inside them, or the QR code in the corner of a photo, has left the obvious route open – and QR moderation in particular is a detail most vendors miss entirely despite it being a standard way to route users off-platform to something worse.

Live stream support matters for anyone whose risk is real-time rather than reviewable after the fact. Two things to plan for regardless of vendor: classifiers produce false positives and negatives at any threshold you pick, so build a human appeal path, and moderation thresholds carry cultural and legal context that no API infers for you – the policy decisions remain yours.

Key features

  • Image moderation across 120+ classes
  • Video and live stream moderation
  • OCR and QR code moderation inside images
  • Text moderation and filtering
  • Audio transcription with profanity detection
  • API-first with a free tier and live demo

Screenshots & demo

Sightengine screenshot 1

Pricing

Sightengine offers a free plan, with paid upgrades for higher limits and more features.

  • Pricing modelFreemium
  • Starting priceFree
  • Free planYes
Visit Sightengine

Pricing is provided as a guide. Check the official site for the latest plans.

Is Sightengine expensive?

Sightengine has no advertised paid tier. Among the 25 priced tools we list in Security & Compliance AI, the median entry price is $50 a month.

19% of Security & Compliance AI tools in the directory offer a free tier, and this is one of them.

Compared against every priced listing in Security & Compliance AI, recalculated as the catalogue changes. Method and the full market breakdown are in our AI tool pricing study.

Pros & cons

Pros

  • Covers formats most moderation vendors leave gaps in, including QR codes
  • Live stream support for real-time rather than after-the-fact risk
  • Demo and free tier let you test against your own content

Cons

  • Classifiers produce false positives and negatives at any threshold
  • A human appeal path is still required – the API does not remove that need
  • Moderation policy and cultural context remain your decisions, not the vendor's

How it compares

ToolRatingFreeFromBest known for
Sightengine (this tool)4.0YesFreeImage moderation across 120+ classes
Modulate4.1YesFreeLive voice chat analysis
TrueBees3.7YesFreeDetects AI-generated and AI-modified images
ModerateHatespeech3.6YesFreeML models trained on hundreds of thousands of real comments

Alternatives to Sightengine

4 tools matched to Sightengine on what they do, their category and their price.

CaliberAI

3.6

AI flags defamatory and high-risk content in near real-time, in the browser or CMS, before it publishes – used by Mediahuis, McCann Fitzgerald and Tindle Newspapers.

Contact for Pricing Security & Compliance AI

Frequently asked questions

What is Sightengine?
Sightengine is a content moderation API spanning every format user-generated content actually arrives in: images with 120+ moderation classes, video and live streams, text, audio with profanity detection, and OCR plus QR code moderation.
Is Sightengine free?
Yes, Sightengine offers a free plan. Paid plans unlock more features and higher usage limits.
What are the best Sightengine alternatives?
The closest matches in the directory are Modulate, TrueBees, and ModerateHatespeech, compared side by side above.

Reviews

4.0 Editorial rating No reviews yet

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