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> Nubank (the largest digital bank in the world) using Clojure as their primary driver grew from ~12M customers in 2019 to 131M in 2025 - almost 1000% growth in

> Nubank (the largest digital bank in the world) using Clojure as their primary driver grew from ~12M customers in 2019 to 131M in 2025 - almost 1000% growth in less than a decade. JPMorgan that has about 80M customers took around 150 years and dozens of acquisitions. - There's not much correlation between tech stack and product quality, let alone market share. - JPMC has ~$4.4T in assets vs. Nubank $75B ($0.075T).

iLemming 2mo ago
> There's not much correlation In this specific case it is. There is a direct correlation. One simply needs to do fifteen seconds of research into it - Datomic was the single strategic multiplier that enabled Nubank's success. Later they made an executive decision to acquire Cognitect to secure their critical tech element. They didn't buy the makers of Clojure simply out of love for Rich Hickey's hairstyle. Your point about JPMC is silly - assets are not a customer base, and I said nothing about the former. If JPMC had grown its customer base at the same 10.9x rate as Nubank, starting from ~60M in 2019, they would have reached roughly 10% of Earth's population. Arguing against Nubank's achievement is like insisting on a flat Earth. Not attributing their success to their tech stack is just not knowing the facts.
- computably 2mo ago
  > Not attributing their success to their tech stack is just not knowing the facts. Touche. Though that's context you could've also included. > Arguing against Nubank's achievement is like insisting on a flat Earth. I'm not denying their achievement, I'm putting it in perspective. Having 100 clients for a consumer product doesn't mean a more successful business than 20 clients for an enterprise product. It is apples to oranges, for sure, but you're comparing startup growth in an underbanked region to the literal largest (by assets, outside China) bank in the world.
  - iLemming 2mo ago
    > you're comparing ... to the literal largest bank in the world. Well, Nubank is literally the largest digital bank in the world, by customer count & valuation. I'm baffled as to what you're trying to prove. It's as if I said: "look, this racing team achieved sub-sonic speeds with their bolide because they've put some innovative research and science into it..." and you would've replied: "well, it still can't pull the load a monster truck could..." Why can't we just agree that what they pulled off within just a few years is actually pretty amazing? And it is pretty cool that the tech direction they chose totally paid off.
    - computably 1mo ago
      Well, for one thing, you brought up the monster truck first. :) Anyways, I do agree that Nubank's growth is impressive.

iLemming 2mo ago

> There's not much correlation In this specific case it is. There is a direct correlation. One simply needs to do fifteen seconds of research into it - Datomic was the single strategic multiplier that enabled Nubank's success. Later they made an executive decision to acquire Cognitect to secure their critical tech element. They didn't buy the makers of Clojure simply out of love for Rich Hickey's hairstyle. Your point about JPMC is silly - assets are not a customer base, and I said nothing about the former. If JPMC had grown its customer base at the same 10.9x rate as Nubank, starting from ~60M in 2019, they would have reached roughly 10% of Earth's population. Arguing against Nubank's achievement is like insisting on a flat Earth. Not attributing their success to their tech stack is just not knowing the facts.

computably 2mo ago
> Not attributing their success to their tech stack is just not knowing the facts. Touche. Though that's context you could've also included. > Arguing against Nubank's achievement is like insisting on a flat Earth. I'm not denying their achievement, I'm putting it in perspective. Having 100 clients for a consumer product doesn't mean a more successful business than 20 clients for an enterprise product. It is apples to oranges, for sure, but you're comparing startup growth in an underbanked region to the literal largest (by assets, outside China) bank in the world.
- iLemming 2mo ago
  > you're comparing ... to the literal largest bank in the world. Well, Nubank is literally the largest digital bank in the world, by customer count & valuation. I'm baffled as to what you're trying to prove. It's as if I said: "look, this racing team achieved sub-sonic speeds with their bolide because they've put some innovative research and science into it..." and you would've replied: "well, it still can't pull the load a monster truck could..." Why can't we just agree that what they pulled off within just a few years is actually pretty amazing? And it is pretty cool that the tech direction they chose totally paid off.
  - computably 1mo ago
    Well, for one thing, you brought up the monster truck first. :) Anyways, I do agree that Nubank's growth is impressive.