
🧹 Sweep recently launched!
Founded by William Zeng & Kevin Lu
Hi everyone! Meet William and Kevin. They’re building a better AI autocomplete for JetBrains.
They originally started Sweep in 2023 to build an AI junior developer, which hit 7.6k stars on GitHub.
The founders' soon realized that this was many years out. Instead, they decided to build a coding assistant that developers could use today. William and Kevin have been JetBrains users since they were in college, and they were surprised something like this didn’t exist yet.
They built Sweep for themselves, and use Sweep Tab hundreds of times a day to write production-grade code instead of vibe coding. It’s boosted their productivity by 2x and they hope you like it too.
Developers writing production-grade code need tools like autocomplete that keep them in the loop rather than agents that take them out of it.
JetBrains users don’t have an AI autocomplete that works well. The leading plugins are not products that users love:


The founders' are building tools for professional developers using JetBrains, starting with super fast autocomplete that’s smarter than Cursor Tab.
They’ve fine-tuned their own LLM with a custom inference stack that suggests completions with sub-100ms latency. Unlike Cursor, they use the JetBrains code index to let their autocomplete model navigate your code like a real developer.
The Sweep founders' have heard great feedback so far:
“AI is finally useful inside JetBrains — thanks to sweep. A million times better than JetBrains’ own tools.” - Christiaan Bilthof, CTO @ Leat
“Compared to every other tool and IDE I've used, it's incredibly fast - so much so that the next tab predictions and autocomplete feel instantaneous.” - Ashkan Aghdai, Staff Engineer @ Amplitude
“I used to have to choose between using PyCharm and good autocomplete - but with Sweep, I get both. It’s a massive productivity boost.” - Josiah Parappally, Staff Engineer @ Ramp