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About
Lewis Blackwood is founder and CTO at Rex, an enterprise order-to-cash AI platform. He was a founding engineer at Sequence, a venture-backed company, and cofounded Personably; earlier he was part of the initial team at GoCardless, a payments startup backed by Y Combinator, and studied economics at Cambridge University.
CTO at RexYC S26
Intro paths
Lewis went through Y Combinator (Summer 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Vivian Midha Shen, Founder at Acely — the partner who ran Rex's batch and knows the company first-hand.
In turn, Lewis can intro founders to Rex's investors below.
Rex's investors · 16
Co-founders at Rex
Frequently asked questions
- Who is Lewis Blackwood?
- Lewis Blackwood is founder and CTO at Rex, an enterprise order-to-cash AI platform. He was a founding engineer at Sequence, a venture-backed company, and cofounded Personably; earlier he was part of the initial team at GoCardless, a payments startup backed by Y Combinator, and studied economics at Cambridge University.
- Where does Lewis Blackwood work?
- Lewis Blackwood is CTO of Rex.
- What companies did Lewis Blackwood found?
- Lewis Blackwood founded Rex.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
University of Cambridge mafia725
Also came through, then founded or led a company.
GoCardless mafia13
Also came through, then founded or led a company.
Sequence mafia2
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Rex's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights