Heller: Casetext built CoCounsel with plain Python, dismissing frameworks like LangChain
Jake Heller · From Idea to $650M Exit: Lessons in Building AI Startups · Y Combinator · Oct 28, 2025 · at 14:16
Jake Heller, co-founder and CEO of Casetext, explains the architectural approach behind their legal AI assistant, CoCounsel.
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“And to be honest, a lot of the stuff that we built while building co-council was exactly like this. Every time you do this task, you're basically gonna take the same six or seven steps. And you don't need to have, frankly, like fucking Langchain or whatever. Just Python code.”
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