Shortlist by what you need
Start here if you know why you are leaving Sightengine.
Want the closest match?
ModulateMost similar to Sightengine in what it does, its category and its price.
Visit (opens Modulate in a new tab)Need a free plan?
ZeroThreat.aiHas a free plan, rated 4.0 out of 5.
Visit (opens ZeroThreat.ai in a new tab)Want the best rated?
TrueBeesRated 3.7 out of 5 in our review, against 4.0 for Sightengine.
Visit (opens TrueBees in a new tab)
At a glance
Green means better than Sightengine, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 SightengineBaseline | 4.0 | Free | Yes | Content moderation API covering images, video, live streams, text, audio and even QR codes, with 120+ image moderation classes. | |
| Modulate | 4.1+0.1 | Free | Yes | Voice moderation that flags harmful behaviour in live game and social audio. | vs Sightengine |
| TrueBees | 3.7−0.3 | Free | Yes | Deepfake detector for AI-generated and AI-modified images, built in the EU for people who need to check whether a picture is real. | vs Sightengine |
 ModerateHatespeech | 3.6−0.4 | Free | Yes | Machine learning trained on hundreds of thousands of comments flags hate speech and harassment with 98% accuracy in about 2.2 seconds per comment - adjustable confidence thresholds included. | vs Sightengine |
 CaliberAI | 3.6−0.4 | Not listed | No | 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. | vs Sightengine |
| ZeroThreat.ai | 4.0Same | $100/mo | Yes | AI-powered DAST scanner checking web apps and APIs against 40,000+ vulnerabilities | vs Sightengine |
 Lasso Moderation | 3.5−0.5 | Not listed | No | 99.9% of flagged content auto-decided by AI - multi-modal moderation across text, image, video, and audio, learning continuously from the human review on the remaining 0.1%. | vs Sightengine |
The alternatives in detail
In order of how closely each one matches Sightengine.
Modulate
4.1Free
vs Sightengine+0.1
Voice moderation that flags harmful behaviour in live game and social audio.
- Live voice chat analysis
- Harm detection rather than profanity filtering
- Context-aware judgement of speech
Reaches voice, which text moderation cannot
Analysing user voice at scale is a significant privacy matter to disclose
TrueBees
3.7Free
vs Sightengine−0.3
Deepfake detector for AI-generated and AI-modified images, built in the EU for people who need to check whether a picture is real.
- Detects AI-generated and AI-modified images
- Published explanation of how detection works
- EU-based for data residency requirements
Explains its method instead of returning an unexplained verdict
Detection accuracy shifts as generative models improve
ModerateHatespeech
3.6Free
vs Sightengine−0.4
Machine learning trained on hundreds of thousands of comments flags hate speech and harassment with 98% accuracy in about 2.2 seconds per comment - adjustable confidence thresholds included.
- ML models trained on hundreds of thousands of real comments
- Measured 98% accuracy, ~2.2 second processing time per comment
- Adjustable confidence thresholds (0.5-1.0)
Published accuracy and speed figures give a real, evaluable performance benchmark
Cost details aren't shown - obtain an API key via signup to see pricing
CaliberAI
3.6Not listed
vs Sightengine−0.4
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.
- Near-real-time defamation and risk flagging via browser extension and CMS integration
- Whole-article defamation-risk scanning before publication
- Comment and user-generated-content moderation
Catches risk before publication, not just after content is already live
No published pricing - sales-contact-only process
ZeroThreat.ai
4.0$100/mo
vs SightengineSame
AI-powered DAST scanner checking web apps and APIs against 40,000+ vulnerabilities.
- DAST scanning across web applications and REST APIs
- Library of 40,000+ vulnerability checks
- Vendor-stated 98.9% detection accuracy with low false positives
Free tier lets you scan before committing to a plan
Per-target pricing grows costly across a large application estate
Lasso Moderation
3.5Not listed
vs Sightengine−0.5
99.9% of flagged content auto-decided by AI - multi-modal moderation across text, image, video, and audio, learning continuously from the human review on the remaining 0.1%.
- 99.9% of flagged content auto-decided by AI
- Multi-modal coverage - text, image, video, and audio
- 200+ language support for text moderation
Genuinely protective trust-and-safety tool, not a generation or scraping product
Pricing isn't published - requires contacting the team
FAQ
Questions people ask
Is Sightengine free?
Sightengine has a free plan.
What is the best free alternative to Sightengine?
Modulate is the highest-rated alternative here with a free plan (4.1 out of 5). Other free options: ZeroThreat.ai, TrueBees, ModerateHatespeech.
What is the cheapest alternative to Sightengine?
Among paid plans, ZeroThreat.ai has the lowest starting price (from $100/mo). If you need it free, start with Modulate.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.