Periscope (service)
mobile live video streaming application

Periscope was an American live video streaming app for Android and iOS developed by Kayvon Beykpour and Joe Bernstein and acquired by Twitter, Inc. before its launch in March 2015.
The service was discontinued on 31 March 2021 due to declining usage, product realignment, and high maintenance costs. However, Periscope videos can still be watched via Twitter, now called X, and most of its core features are now incorporated into the app.
History
Kayvon Beykpour and Joe Bernstein came up with the idea for Periscope while traveling abroad in 2013. Beykpour was in Istanbul when protests broke out in Taksim Square. He wanted to see what was happening there, so he turned to Twitter. While he could read about the protests, he could not see them. They started the company in February 2014, under the name Bounty. They raised $1.5 million from Founder Collective, Scott Belsky, Maveron, Google Ventures, Menlo Ventures, Bessemer, Stanford – StartX and Sam Shank in April 2014.
This brief starts where responsible research should: with the source description of “Periscope (service)” as mobile live video streaming application. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as mobile live video streaming application. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jul 24, 2026. The linked authority identifier is Q19687076. 2 of 4 selected statements include explicit references; 1 carry qualifiers and 1 use preferred rank. The first chronological checks are 2015, 2021, 2013 and 2014.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Periscope (service)”, its source revision and the description used here.
- Expand the search: follow Periscope (service) primary sources, Periscope (service) archive and Periscope research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Periscope (service)”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Periscope (service)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.