Known image re-uploaded as a profile photo
Exact match. Blocked on upload.
mara_klEdit profile · Photos
Allowed
AllowedRemoved
Exact match
AllowedRemoved on uploadNot saved to profile
CSAM detection and reporting
Moderate known CSAM in user uploads. Exact copies and altered variants are blocked, and can be reported to authorities such as NCMEC. Easily include an audit trail for DSA, UK Online Safety Act, and other compliance obligations.
- AllowedAllowedAllowed
Altered variant shared in a private chat
Flagged, never shown to other users.
jonas.rPrivate chat · 4 imagespics from saturday?yeah here you go
Allowed
AllowedFlaggedAltered variant
AllowedFlagged, hidden from recipientForum attachment. Flagged. Auto-blocked.
Moderator confirms from a blurred preview.
dvx_88Re: weekend meetupadding the photos from saturday, one more in the attachments
3 attachments · 1 removedAllowedAllowedRemovedKnown materialRemoved, blurred preview to moderatorSame image uploaded again from a new account
Matched again. Blocked on upload, account flagged.
n.ryder_2New account · 3 min agolisting_14.jpg
UploadedAllowedMatched againupload_final.jpg
Same image, new accountRemovedRemoved on uploadAccount flagged
How CSAM detection works
1The match
Every image compared against known material.
Exact copies and altered versions of a known image matched. A match is blurred in the dashboard before anyone sees it.
See Lasso in actionUpload → descriptor fingerprint
Partner database · known material
Fingerprint match
Known-material match
Match found
Compared against
Known image A19no match
Known image B02no match
Known image C47MATCH
Changes detected
Crop, re-encodeVARIANT
Match · altered variant
Blurred in the dashboard before anyone sees it
2Your rules
A match triggers the actions you set: content hidden, account suspended, moderator notified.
Zero-tolerance platforms block and suspend on first match.
See Lasso in actionOn match · applied
1ImageHidden
2mara_klSuspended
3ModeratorNotified
Custom rules
On matchKnown CSAM
Hide content
Suspend account
Notify moderator
Log for audit
Blocked
Account suspended on first match
3Human review and reporting
Moderators see a blurred preview, the match, and the uploading account.
One click confirms. Confirmed cases go to NCMEC and other reporting platforms automatically. Every decision logged.
See Lasso in actionRestricted queue
Match summary
Known material, altered variant. Blurred by default. Reveal on demand only.
Human review1 of 1
Match
Known material, altered variant | account created 3 min ago
Reporting on confirm
NCMEC CyberTipline — match data and audit log
Audit log
Detected, confirmed, reported · sent
Every decision logged with the audit trail
CSAM detection capabilities
Every image compared against a database of confirmed CSAM material. Exact copies and altered variants matched: crops, resizes, mirrors, filters, re-encodes.
Known image + variantsSame fingerprint
Match result
Exact copyMatched
CropMatched
MirrorMatched
Re-encodeMatched
Variants
4 of 4
Crops, mirrors and re-encodes resolve to the known fingerprint
Block the image, strike the account, route to a restricted queue, or all three. Applied automatically on every match.
Flagged images never render unblurred by default. Reveal on demand only. Confirmed matches routed to the NCMEC CyberTipline with the audit trail kept.
Known image + variantsSame fingerprint
Match result
Exact copyMatched
CropMatched
MirrorMatched
Re-encodeMatched
Variants
4 of 4
Crops, mirrors and re-encodes resolve to the known fingerprint
Lasso: next-gen AI content moderation
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Runs on autopilot. Every human decision sharpens it.
Three layers of AI absorb the volume, enforce your rules, and surface the grey areas. Your team only sees what needs a human, and each call they make improves the next pass.
Keep users safe without driving them away.
Customizable moderation that lets you find the right balance between safety and user experience. So you protect your community without suppressing the culture that makes it worth joining.
We take the complexity out of content moderation.
One API. Clear dashboards. A moderation pipeline built around one-click actions and the right context, right where you need it.
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Highest rated in content moderation on G2.
Every platform with image uploads. Three examples.
Social platforms
Social platforms carry the highest upload volumes and the strictest reporting duties.
- Re-uploads of known images across posts, stories, and comments
- Cropped or filtered copies shared in private groups
- Accounts created only to distribute known material
Gaming
Known material arrives through avatars, custom content, and chat attachments.
- Avatar and banner uploads matching known images
- Image attachments in party and guild chat
- Custom skins and textures used to smuggle altered copies
Adult entertainment
Adult platforms must keep known CSAM off the platform on first upload.
- Known images mixed into large batch uploads
- Altered variants re-uploaded after an earlier removal
- Verification and profile photos matching known material
FAQs
CSAM detection, answered
CSAM detection matches uploaded images against databases of known child sexual abuse material. Lasso identifies exact copies and modified variants. A match is blocked, blurred for your moderators, and confirmed cases can be reported to authorities such as NCMEC.
The image is blocked and never shown to other users. Your rules determine other automated actions; hide the content, suspend the account, notify a moderator etc. The image lands blurred in the review queue with the match details and account context. Once confirmed, it is reported to authorities such as NCMEC and every step is logged.
Yes. Confirmed matches are routed to the NCMEC CyberTipline from the moderation dashboard, with the match data and audit log attached. Platforms outside the US report to their national authority through the same workflow.
Any matched image is blurred automatically in the dashboard. Moderators confirm a decision from the blurred preview, the match details, and the account context, and reveal an image only on demand. Exact matches never need a human to look at them.
Any platform where users upload images: social, gaming, chat, dating, marketplaces, adult platforms. US platforms are required to report apparent CSAM to NCMEC; the EU Digital Services Act and the UK Online Safety Act add their own duties. Lasso covers detection, blocking, review, and reporting.
See CSAM detection on your uploads
Turn on CSAM detection inside your image moderation. Matching, rules, blurred review, and reporting included.