Prove what's yours.
Sign your work before you publish it. If it ever gets stolen, copied, or taken out of context, the proof is already there.
Free to start. No credit card required.
Sarah Chen
March 16, 2021
March 16, 2021
Sign your work before you publish it. If it ever gets stolen, copied, or taken out of context, the proof is already there.
Free to start. No credit card required.
Upload your photo, video, or file. Sigil creates a unique cryptographic signature tied to your identity, a permanent, unforgeable receipt.
Post to Instagram, send to a client, submit to an editor. Your sigil follows the content wherever it goes. No plugins or special tools needed.
Anyone can check if content carries a sigil. Crops, screenshots, re-encodes: the proof survives. If it's yours, everyone can see it.
Your images get reposted without credit. Sigil proves you took the shot, even after it's been cropped, filtered, or screenshotted.
Your reporting gets taken out of context. Sigil links every piece back to you and your original framing.
Your deliverables end up in places they shouldn't. Sigil gives you a receipt that holds up, even in court.
Your sigil survives. Unlike metadata-based approaches that get stripped on re-upload, Sigil uses perceptual fingerprinting to match content even after crops, compression, screenshots, and format changes.
C2PA embeds metadata into files, which gets stripped the moment someone screenshots, re-encodes, or re-uploads your work. Sigil uses perceptual fingerprinting that survives those modifications. It's also open and tool-agnostic: no Photoshop or Adobe subscription required.
No. Upload through the web app or use the API. Once signed, your content can be published anywhere (Instagram, email, a client portal) with no plugins or special export steps.
Anyone can drop an image into Sigil's public verification page to check if it carries a signature. No account required. We're also building a browser extension that verifies content passively as you browse.
Every upload is screened against existing signatures at sign time. If the content already has an owner, the claim is rejected automatically. Fraudulent claims trigger a permanent conflict record, and our Terms of Service include liquidated damages and account suspension for abuse.
Sigil doesn't try to prove fakes are fake. It proves originals are real. If a creator signs their work before publishing, anyone can verify that it came from them. The absence of a sigil becomes the signal, the same way the absence of HTTPS tells you a site might not be trustworthy.
Sigil creates a permanent conflict record and notifies both parties. Timestamps, signing metadata, and the full audit trail are preserved so the dispute can be resolved, by the parties or in court if needed.
Yes. Every signature includes a cryptographic timestamp, chain of custody, and match metadata, designed to meet the standard for digital evidence. Paid plans include legal evidence exports formatted for attorneys.
Images today: JPEG, PNG, WebP, and TIFF. Video support is coming soon.