645 Ventures

Shop Circle

London

We’re building the next-generation software platform where exceptional products, people, and AI come together to power the infrastructure of modern enterprise.

Order.co

New York

Order is a guided B2B marketplace that helps businesses place orders, control spend, and submit payment across their vendors.

Sequence

London

Sequence is an AI-powered revenue platform for finance teams, processing over $1B in invoice volume with 10x ARR growth. It closed a $20M Series A led by 645 Ventures with a16z, counting Cognition, incident.io, MoonPay, and 100+ others as c

Attention

New York

Enterprise-grade AI for Sales: Automate work out of your sales conversations

HockeyStack (YC S23)

San Francisco

The company offers a dedicated operating system for inbound B2B revenue, delivering a specialized platform for businesses in B2B markets.

Strella

New York

Strella is an end-to-end customer research platform that uses AI to deliver human insights 10x faster, helping teams make smarter decisions in hours rather than weeks without sacrificing quality.

Momos

San Diego

Momos provides an AI Customer Copilot for multi-location brands, delivering AI-powered customer experiences at every location. The platform serves 20,000+ locations globally, with notable clients including Firehouse Subs, Shake Shack, and P

Mandolin

San Francisco

Mandolin is building last-mile delivery infrastructure to speed development and delivery of cutting-edge drugs (cell/gene therapies, biologics), aiming to extend healthy lifespans by shortening time to patient access; backed by SignalFire,

DeepSource

San Francisco

DeepSource is a unified DevSecOps platform that analyzes code changes to identify and fix security, performance, anti-patterns, and bug risks across every commit and pull request, integrating with GitHub, GitLab, and Bitbucket.

Meridian

San Francisco

The company catalyzes the next generation of consumer experiences by redefining how people interact with products and services, driving innovation in everyday engagement and shaping how brands are experienced in modern markets.