Substrate

Powerful SDKs, with batteries included: optimized AI models, vector storage, code interpreter, and agentic control flow. You can build fast, and run fast – Substrate is also an inference engine designed to run multi-step AI workloads. Run tasks with dozens of inference calls, parallelized automatically and with zero roundtrips.

Substack runs all of their inference on Substrate (including many complex workloads with dozens of nodes), enabling semantic understanding across their entire content catalog (17k+ active writers), and empowering writers and readers with generative AI tools.

Schedule a demo: https://cal.com/substrate-ben/20min