#BarCamp

A hashtag for the unconference movement where participants create the agenda. Among the earliest hashtags to organize real-world tech events, #BarCamp became a template for using Twitter to coordinate grassroots gatherings. The tag represents the democratization of tech conferences and remains active for BarCamp events worldwide.

Quick Facts

Origin Story

BarCamp began in 2005 as a reaction to the exclusive, invitation-only “Foo Camp” conferences hosted by O’Reilly Media. Frustrated by limited access to tech gatherings, a group of developers created BarCamp—an open, participatory “unconference” where attendees determined the schedule and anyone could present.

By 2007, when Chris Messina proposed using # for groups on Twitter, BarCamp was already an established movement with events worldwide. Messina himself was a BarCamp organizer and participant, and his original August 23, 2007 tweet proposing hashtags specifically mentioned “#barcamp” as an example: “how do you feel about using # (pound) for groups. As in #barcamp [msg]?”

This made #BarCamp one of the first hashtags ever proposed and used. The format was perfect for unconferences:

• Real-time session announcements (“Session on Ruby debugging in 10 min, room 3 #BarCamp”)
• Attendee coordination (“Anyone want to grab lunch? #BarCamp”)
• Backchannel discussion during talks
• Post-event networking and follow-up

BarCamp’s adoption of hashtags influenced how all tech conferences would use Twitter. The unconference model aligned perfectly with Twitter’s democratic, participatory ethos. Unlike traditional conferences with official accounts broadcasting to passive audiences, #BarCamp represented distributed, peer-to-peer communication.

The hashtag spread as BarCamp events proliferated globally. Each city added its location (#BarCampSF, #BarCampBangalore, #BarCampLondon), establishing the pattern of event hashtags with geographic modifiers.

Timeline

August 2007

• Chris Messina proposes hashtags, using #barcamp as example
• #BarCamp becomes one of first actively used hashtags
• BarCamp organizers immediately adopt for coordination

Late 2007-2008

• BarCamp events worldwide adopt hashtag convention
• Location-specific variations proliferate
• Format becomes template for tech event hashtags

2009-2010

• Peak BarCamp movement growth
• Hundreds of events annually use hashtag
• Twitter officially adds hashtag linking (2009)

2011-2014

• Continued strong usage
• BarCamp model influences other event types
• Real-time backchannel becomes conference standard

2015-2020

• BarCamp events continue but growth slows
• Unconference model adopted by mainstream conferences
• Hashtag remains active for niche events

2021-Present

• Virtual and hybrid BarCamps during/post-pandemic
• Usage on decentralized platforms (Mastodon)
• Legacy as hashtag pioneer remains significant

Cultural Impact

#BarCamp holds special significance as one of the first hashtags proposed and adopted, making it part of internet history. Chris Messina’s choice to use BarCamp in his original example wasn’t random—he was deeply involved in the unconference movement and understood how hashtags could enhance participatory events.

The tag demonstrated hashtags’ potential to bridge online and offline worlds. BarCamp participants could discover sessions, coordinate meetups, and continue conversations beyond physical proximity. This influenced how all conferences, festivals, and gatherings would eventually use social media.

BarCamp’s open, participatory ethos matched early Twitter’s culture. The unconference model—where everyone can contribute, hierarchy is minimized, and collaboration is emphasized—reflected Silicon Valley’s idealized view of itself. #BarCamp became symbolic of tech culture’s democratic aspirations, even as criticism grew about whose voices actually dominated these spaces.

The hashtag helped establish patterns still used today: event announcements, live-tweeting, speaker tags, photo sharing, and post-event networking. Modern conference social media strategies descend directly from #BarCamp practices.

Notable Moments

• August 23, 2007: Appears in Chris Messina’s original hashtag proposal tweet
• 2008: BarCamp Bank established pattern for corporate/themed BarCamps
• 2009: Over 300 BarCamp events held globally
• 2010: BarCamp model influences major conferences like SXSW
• 2015: BarCamp celebrates 10 years of events

Controversies

Diversity and inclusion: Like much of early tech culture, BarCamps faced criticism for lack of diversity. The “anyone can speak” model sometimes meant those already comfortable dominating conversations (often white men) did so, while others struggled to be heard.

Corporate co-option: As BarCamp grew popular, companies began hosting branded versions (BarCamp Bank, etc.), which some felt violated the grassroots spirit.

Free labor concerns: The unconference model meant speakers presented without compensation, raising questions about who could afford to participate and whether it devalued expertise.

Quality control: The open format sometimes resulted in poor presentations or off-topic sessions, frustrating attendees seeking professional development.

Variations & Related Tags

• #BarCamp[City] - Location-specific (e.g., #BarCampSF, #BarCampNYC)
• #BarCamp[Topic] - Theme-specific (e.g., #BarCampBank, #BarCampEdu)
• #Unconference - Broader movement tag
• #OpenSpace - Related facilitation method
• #EdCamp - Education-focused unconferences

By The Numbers

• All-time usage: ~2M+ tweets (estimated)
• Peak usage: ~50K-100K per year (2009-2012)
• Current usage: ~10K-20K per year
• Events: 1000+ BarCamps held worldwide since 2005
• Countries: 350+ cities in 80+ countries
• Demographics: Primarily tech workers, developers, designers, entrepreneurs
• Age: Concentrated 25-45 years old

References

• How Twitter’s Hashtag Came To Be - Wall Street Journal
• BarCamp Wikipedia
• Chris Messina’s Original Hashtag Proposal Tweet (August 23, 2007)
• The History of Hashtags - Merriam-Webster

Last updated: February 2026