Justin So
Founder and CEO @ Sidekick (YC P26)
United States
Saratoga
Computer Software
Leadership, Python (Programming Language), Financial Analysis, Teamwork, Problem Solving, Persistence, Investments, Financial Modeling, Economics, Due Diligence, Business Analysis, Analytical Skills, Accounting, Microsoft PowerPoint, Microsoft Excel, Microsoft Outlook
Experience
Founder and CEO
Sidekick (YC P26)
San Francisco, California, United States
Finance Analyst
Arm
San Jose, CA
Education
Y Combinator
Spring 2026
University of Pennsylvania
Computer Science
Dropped out
UC Santa Barbara
Economics
Zeta Psi
Lynbrook High School
General Studies
Varsity Tennis Captain
Justin So's Contact Information
Phone
Find the Right Leads
Find Verified Contact Data
What LeadContact does well
Find verified emails, phone numbers, and decision-makers with 98% accuracy.
Find Leads
Find the right people by company, role, industry, location, and more.
925M+ professional profiles
Find Emails
Access verified email addresses for your target contacts.
657M+ emails
Find Phone Numbers
Get cross-validated phone data from multiple top sources.
239M+ phone numbers
More Accurate. Lower Cost.
Find contact data in 1 tool with 98% accuracy
LeadContact integrates leading enrichment tools to deliver more accurate contact data—without paying for each one.
Great conversations start with the right contact.
It’s time to find yours.