Public APIs
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Opsis

Security

Check which of 1,000+ sites an email address or username is registered on, with profile details and the source for each result.

Opsis's website screenshot

About Opsis

Opsis is an OSINT search platform that looks up emails, usernames and domains across more than 1,000 online services, including social networks, developer communities, gaming platforms and forums. Searches return available profile details such as names, photos, bios and locations alongside the source they came from, though some services only confirm that an account exists without returning further details. The platform also offers a set of free tools for individual lookups, including reverse email lookup, Instagram, Steam, Xbox, Epic Games, FACEIT, Twitch, Duolingo and GitHub lookups.

The product is aimed at investigators, security teams and other professionals conducting identity or account research, with guidance on the site noting that a matching username or email does not by itself confirm the same person controls multiple accounts. It is accessible through a browser-based app, and an API is available for integrating email and username searches into other applications or workflows.

Opsis is offered on three paid monthly plans: Starter ($14.99/month, 25 searches), Basic ($24.99/month, 75 searches, adds premium deep search and priority support), and Pro ($49.99/month, 150 searches, adds API access for automation).

Key features

  • Reverse lookup of emails, usernames, and domains across 1,000+ online service modules
  • Surfaces available profile names, photos, bios, and locations alongside the matched account
  • Links back to original source profiles when a public link is available
  • Dedicated free tools for Reverse Email, Instagram, Steam, Xbox, Epic Games, FACEIT, Twitch, and Duolingo lookups
  • API access for integrating email and username search into other apps or workflows

Frequently asked questions

What is Opsis?

Opsis is an OSINT (open-source intelligence) search platform that checks online services for accounts associated with an email, username, or domain and brings the results into one workspace.

Does Opsis have a free tier?

There is no free plan for the full platform, but Opsis offers free individual tools like reverse email, Instagram, and Steam lookups. Paid plans start at $14.99/month for 25 searches.

Will a search always return a full profile?

No. Some services return a name, photo, bio, or location, while others only confirm an account exists, and a search may return no matches at all.

Can I use Opsis programmatically?

Yes, the Pro plan ($49.99/month) includes API access for bringing email and username searches into your own application or workflow, with additional API credits available separately.

Does a matching username confirm it's the same person?

No. Different people can use the same handle on different sites, so profile details and original sources should be compared before drawing conclusions.

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