Apr 2009 - Mar 2024
AeroLeads people directory · profile
Cal Henderson Email & Phone Number
Co-founder & CTO at Slack
1 work email found
@slack-corp.com
6 phones found area 415
LinkedIn matched
✓ Verified May 2026
4 data sources
Profile completeness 86%
Role
Co-founder & CTO at Slack
Location
San Francisco, California, United States
Who is Cal Henderson? Overview
A concise factual answer block for searchers comparing this professional profile.
Quick answer
Cal Henderson is listed as Co-founder & CTO at Slack based in San Francisco, California, United States. AeroLeads shows a work email signal at slack-corp.com, phone signal with area code 415, and a matched LinkedIn profile for Cal Henderson.
Cal Henderson previously worked as Co-founder & CTO at Slack Technologies, Inc and Head of Engineering at Flickr. Cal Henderson holds Bsc, Software Engineering from Birmingham City University.
Company email context
Email format at slack-corp.com
This section adds company-level context without repeating Cal Henderson's masked contact details.
{first}@slack-corp.com
86% confidence
AeroLeads found 1 current-domain work email signal for Cal Henderson. Compare company email patterns before reaching out.
Profile bio
About Cal Henderson
I am the Co-founder & CTO at Slack, a platform for modern team communication, in San Francisco, California.Previously, Co-founder and VP Eng for Glitch, a web-based massively multiplayer game. Before that, the Director of Engineering for Flickr at Ludicorp and then Yahoo!Back in the UK, I was the technical director of Special Web Projects at Emap, a UK media company and co-created the creative community B3TA.In 2006 I wrote the best selling book Building Scalable Websites.
Listed skills include Web Development, Javascript, Php, Scalability, and 22 others.
3 roles
Cal Henderson work experience
A career timeline built from the work history available for this profile.
2 education records
Cal Henderson education
Bsc, Software Engineering
Birmingham City University
Education record
Sharnbook Upper School
FAQ
Frequently asked questions about Cal Henderson
Quick answers generated from the profile data available on this page.
What is Cal Henderson's role at their current company?
Cal Henderson is listed as Co-founder & CTO at Slack.
What is Cal Henderson's email address?
AeroLeads has found 1 work email signal at @slack-corp.com for Cal Henderson.
What is Cal Henderson's phone number?
AeroLeads has found 6 phone signal(s) with area code 415 for Cal Henderson.
Where is Cal Henderson based?
Cal Henderson is based in San Francisco, California, United States.
What companies has Cal Henderson worked for?
Cal Henderson has worked for Slack Technologies, Inc, Flickr, and Emap.
How can I contact Cal Henderson?
You can use AeroLeads to view verified contact signals for Cal Henderson, including work email, phone, and LinkedIn data when available.
What schools did Cal Henderson attend?
Cal Henderson holds Bsc, Software Engineering from Birmingham City University.
What skills is Cal Henderson known for?
Cal Henderson is listed with skills including Web Development, Javascript, Php, Scalability, Web Applications, Mobile Applications, User Experience, and Mysql.
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