A Berlin engineering team that got tired of writing the same boilerplate and decided to do something about it.
Lena Krüger spent five years as an engineering lead at Contentful watching her teams spend 40% of their sprint time on scaffolding, test boilerplate, and documentation that added no architectural value. Every sprint. Every team. Different companies, same problem.
She left to build the tool that didn't exist yet. Not an autocomplete wrapper. Not a chatbot for code. Something that actually reads your codebase, understands what you're building, and generates output that fits — tests, docs, and implementation all at once.
Kai Hofmann, who'd spent years thinking about inference performance at Google Zurich, joined as CTO. Together they built a small team of engineers who cared about the same thing: AI that makes developers faster without making them responsible for cleaning up after it.
DeepNest launched in 2025. Today, over 4,500 engineering teams use it to ship faster, test better, and document as they go.
Started in Berlin with a conviction that developers deserve better tools
Engineering teams across software, fintech, healthcare, and developer tooling
Across Python, TypeScript, Go, Rust, Java, and nine other languages
Engineering-first city. We're proud to build here.
Tools should feel like a natural extension of how you already work, not a context switch you have to manage. Every decision we make — from latency targets to review interface design — starts with whether it makes the developer's day easier.
You can see exactly what was generated and why. DeepNest explains its reasoning, marks uncertain output clearly, and never pretends to be more confident than it is. A black box that occasionally breaks production is worse than no tool at all.
Fast output that's actually production-ready, not prototype code your engineers have to clean up before it can ship. If we can't generate it correctly, we say so rather than hand you something that looks right but isn't.
DeepNest cut our sprint cycle by 40%. We ship in three days what used to take a full week of boilerplate and test writing.
Senior Engineer, FinTech startup
The test generator alone saved us 12 hours per release. Every PR now ships with 90% coverage — zero extra effort from the team.
Head of Engineering, B2B SaaS
It understands our TypeScript monorepo better than new hires do on day one. The context awareness is unlike anything else out there.
Freelance Developer, Berlin
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