The Bill, Please
Anh Tho Chuong, FinnThe Bill, Please tells the stories and learnings from building Lago, a YC-backed open-source billing & metering product.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 38 | Subscribers | Read | getlago.substack.com |
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Latest Issues
Recent posts by this newsletter. Browse the email archive.
Embedded software is the biggest growth opportunity for open source
When you link your bank account to Venmo, you’re not using Venmo’s technology, you’re using Plaid. An Uber sends you a ride notification, that originates with Twilio. Maps in Strava, Doordash or Instacart? Powered by Mapbox.
Vibe-coding platforms monetize. Their users can't.
Lovable crossed $200M ARR in under a year. Replit charges up to $200/month per seat. Base44 got acquired by Wix for $80M.
How (and why) we built 3 AI agents on mission-critical billing data
We shipped our first AI features in late 2025, long after many other companies who built RAG chatbots starting in early 2023. That sounds late, but I don’t think it is. It’s a product of how our category constrains us, how we think about pr...
When building AI chat is actually hard (how and why we built our agents)
We shipped our first AI features in late 2025, long after many other companies who built RAG chatbots starting in early 2023. That sounds late, but I don’t think it is. It’s a product of how our category constrains us, how we think about ch...
Authors
The writers behind this newsletter.
Co-founder @ Lago
content @ Lago
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