1
Billing systems are a nightmare for engineers
In this article, Lago's cofounder Raffi gives an overview of the technical challenges we faced while implementing a hybrid pricing model at Qonto, and what we learned during this journey.
Lago Blog
Lago Cloud runs usage, subscriptions, hybrid pricing and invoicing as a hosted service. Self-hosting is also available. Lago customers include CoreWeave, Mistral AI and PayPal.
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2
Why DeepSeek had to be open source
DeepSeek trained a model as good as o1 at a fraction of the cost, then gave it away. Here's why that wasn't a mistake and what it means for OpenAI.
3
Why doesn't Stripe use Stripe Billing?
Can Stripe actually use Stripe Billing to manage subscriptions and invoice its customers? We conducted the experiment.
4
Problems with homemade billing systems
If you're considering building a homemade billing system for your SaaS company, there are a few things you should be aware of. In this article, Qonto's first billing engineer shares four lessons he learned while working on this project.
5
I ate and reviewed every snack in our office kitchen
Office Snacks ranked from banana to jerky to grapes. See which boost productivity, which wreck your desk—and why snacks reveal more than you think.
6
Why we still build with Ruby
Why we still choose Ruby on Rails in 2025: Learn how Lago scales millions of API events with Rails, Go, and Rust, balancing developer speed, concurrency, and performance.