SkeptiCal 2019 Exhibitors


About Time

The mission of About Time is to find, mentor, and train people to educate and promote science and scientific skepticism through crowd-sourced and educational activities world-wide.

Atheist Community of San Jose

The Atheist Community of San Jose brings together atheists in the South Bay for learning, socializing, and serving our community.

Bay Area Skeptics

BAS is the San Francisco Bay Area’s oldest and longest-running science and skepticism organization, promoting reason and critical thinking through regular meetings, SkepTalks, social media, and the SkeptiCal conference.

Freethought Day.jpg

California Freethought Day

California Freethought Day is an annual festival of freethought that combines the fun and atmosphere of a fair with the education and activism of a conference.

Camp Quest West

Camp Quest West provides an educational adventure shaped by fun, friends and freethought featuring science, natural wonder and humanist values.

Central Valley Alliance of Atheists and Skeptics

The Central Valley Alliance of Atheists and Skeptics is a nonprofit educational, service, and social organization focused on supporting the Central Valley’s secular community.

Everything In The Universe

Science humor and variety

The Journal of Irreproducible Results

Science humor and variety

Sacramento Area Skeptics

SAS is a non-profit dedicated to promoting scientific skepticism in our community and across the world through Meetup, Facebook, and the SkeptiCal conference.

Stanislaus Humanists

Humanism is the ethical position that we have to take care of each other right now — in this life, on this planet — and Stanislaus Humanists are committed to educating ourselves and encouraging each other to put our knowledge into action.

Sunday Assembly Silicon Valley

Sunday Assembly Silicon Valley is a secular congregation that celebrates life by the motto “Live Better, Help Often, Wonder More."

Tri-Valley STEM Center

The Tri-Valley STEM Center is a new breed of makerspace and community center where space, equipment, and expertise are shared and where enthusiasts of all ages can engage in hands-on informal STEM learning activities on a 24/7/365 basis.


Wonderfest, the 22-year-old Bay Area Beacon of Science, produces public programs that inspire curiosity, promote careful reasoning, challenge unexamined beliefs, and encourage life-long learning.