Essays by Ry Walker
Essays on AI, startups, and software engineering by Ry Walker, founder of Tembo and Astronomer.
| Feb 10, 2026 | OSSRank: How We Think About Open Source Project Quality A framework for evaluating open source projects beyond star counts — looking at velocity, community health, and commercial viability. |
| Feb 10, 2026 | The Tembo Manifesto Why we're building Tembo: AI coding agents should be orchestrated, not operated. The vision for enterprise-grade agent infrastructure. |
| Feb 6, 2026 | Outbound Sales is Broken in 2025 (And AI Won't Save It) AI outbound scales noise, not trust. Why cold outreach is saturated in 2025 and how warm, relevant paths still win. |
| Jun 14, 2023 | How to Test a Software Startup Idea A step-by-step framework for testing startup ideas: talk to users, fake the demo, iterate until you know what to build. Don't write code yet. |
| Feb 16, 2023 | The Dual Flywheels of Modern Open Source Commercialization Open source your core, build a SaaS around it ASAP, and keep both flywheels spinning. How to balance community and commercial traction. |
| Jun 9, 2022 | The Startup Pitch That Actually Gets Funded A battle-tested framework for seed-stage pitches: the four pillars that matter (product, team, traction, market) and five steps to nail them. |
| Oct 31, 2017 | How to Succeed in the Data Revolution A self-assessment and prescriptions for becoming data-driven: hire a data scientist, establish a warehouse, and track your Daily ETL Tasks. |
| Oct 31, 2017 | The Quest for a Lead Investor How fundraising really works: you'll get a pile of 'no' and a smaller pile of 'maybe.' Without a potential lead in that maybe pile, you're not ready. |
| Oct 24, 2017 | From Behavioral Analytics to Data Science How Astronomer evolved from USERcycle analytics to a data engineering platform. The organic growth from clickstream to Apache Airflow to Kafka. |
| May 9, 2016 | How to Measure Data-Drivenness Could Daily ETL Tasks be an effective indicator for how data-driven your organization is? A thought experiment inspired by Airbnb's data infrastructure. |
| Apr 7, 2016 | Because I Had To The story of leaving safe jobs and comfortable positions to build companies—Differential, then Astronomer—because I had no other choice. |
| Jan 27, 2016 | Our Review of AngelPad: "Game Changing" Our journey through AngelPad as the first Midwest team ever accepted. From application to Demo Day, here's what the top-ranked accelerator is really like. |
| Jan 6, 2016 | The Growing Data Opportunity Data silos are a growing problem as SaaS proliferates. How cloud computing, mobile, and machine learning are creating a data revolution. |
| Aug 28, 2015 | Professional Services for an Early Stage SaaS Company Should early-stage SaaS companies do professional services? Advice from Brad Feld, Hiten Shah, and other investors on the product vs. services dilemma. |
| May 25, 2015 | Don't Sleep on User Retention Most startup advice focuses on product and marketing. Retention gets far less airtime—and that's a shame, because it's where most products die. |
| Dec 28, 2014 | Collect Stories of Astonishment Build something astonishing for your early adopters. Measure their amazement across education, setup, and ongoing value—then track your improvement. |