Plugins Radar Sign up free
Sellat

Sellat

ChatGPT plugin by Cristian Cascante Portabella · Proof your files existed

Productivity v1.0.0 Created Oct 5, 2026 Website ↗ Open in ChatGPT ↗

Data updated · Last checked

Track this plugin
Directory search
#4
for “blockchain”
ChatGPT visibility
28 answers checked · Sign up to see
Category page
—
search only, no category page
Listing score
55/100
leaders average 66

Listing check?What to fix in the listing and how much each item adds to the listing score (55/100; category leaders average 66).

  • !
    Put a search term in the name Search rank?Directory search ranks name matches first: 53% of top-3 results have the search term in the name. Searches for a brand name itself are not tracked.
    The name has none of the tracked search terms.
    8 of 20 category leaders do this
    0 / 30
5 more checksSign up free →

Try a new name or short description →

In ChatGPT conversations?How often ChatGPT mentions Sellat when people ask common Productivity questions.

Visibility
In a suggestion card
Answers checked
Mentioned most
ChatGPT visibilitySign up free →

About Sellat

For “blockchain”, Sellat is #4 of 13 in directory search, and Blockscout Blockchain Data holds #1.

Sellat creates independently verifiable proof that an exact file existed at a given moment. Ask to protect a file and a Sellat panel opens in the conversation: your browser computes the file's SHA-256 fingerprint, and only that fingerprint and the file name reach Sellat. The file never leaves your device.From the plugin’s directory listing

Try asking

@Sellat Protect a file with Sellat without uploading it.
@Sellat How many qualified seals do I have left in Sellat?
@Sellat What is the status of my latest Sellat proof?

Competitors?Plugins that show up in the same tracked searches as Sellat.

  1. Blockscout Blockchain DataBlockscout Blockchain DataBlockscout LTD
  2. Seistream Blockchain DataSeistream Blockchain DataSTAKEME
  3. CipherOwlCipherOwlCipherOwl
  4. InsumerAPIInsumerAPIInsumerAPI
  5. C4 InvestigatorC4 InvestigatorC4 Lab
  6. Attest by DataHubzAttest by DataHubzDataHubz
  7. Token TerminalToken TerminalToken Terminal
  8. AlchemyAlchemyAlchemy Insights Inc.

In the directory

Featured page
Not on it
Category page
Search only
Same job
252 security & privacy plugins
Account
Needed
Listed since
Oct 21, 2026

Recent changes

  1. New appeared in the directory
3 more changesSign up free →

Alternatives to Sellat?Plugins that share searches with Sellat and do the same job.

PluginMade forWorks inComes first for
CipherOwlCrypto address risk screening Teams at workWorldwide—
InsumerAPIWallet auth for AI agents DevelopersWorldwide—
Attest by DataHubzTrack and verify signatures Teams at workWorldwide—

More Productivity plugins

All 2,398 →
#memoryFind and save your memoriesRecall Innovations Inc.1barnRun your barn from chat.1barn, LLC2MindPersonal memory interfaceSAVAS TURKOGLU3DA - 3D ScannerHow much paint do I need?MC Media LLC4DanceFind your next dance event4Dance5×5Log and review your workoutsErik Edin6X6Essential answers firsto-k-78digit PlannerPlan and review social content8digit Creative LLC8gnc — Brand Growth DiagnosticDiagnose brand growthBranded Mayhem Collective LLC8ight SEO & GEOYour Google and AI visibility8ight.AI9Pic AIEvent photo workflows in chat9Pic AIAAC Card Maker학생 맞춤 AAC 카드와 A4 인쇄물을 만듭니다.jch4825

Sellat: questions and answers

What does Sellat do?

Proof your files existed. Sellat creates independently verifiable proof that an exact file existed at a given moment. Ask to protect a file and a Sellat panel opens in the conversation: your browser computes the file's SHA-256 fingerprint, and only that fingerprint and the file name reach Sellat. The file never leaves your device.

How do I use Sellat in ChatGPT?

Install it from the ChatGPT plugin directory, then mention @Sellat in a chat. Its listing suggests asking “Protect a file with Sellat without uploading it.”, “How many qualified seals do I have left in Sellat?” or “What is the status of my latest Sellat proof?”

Which plugins compete with Sellat?

Sellat shares directory searches with Blockscout Blockchain Data, Seistream Blockchain Data, CipherOwl and InsumerAPI.