MosaicML
MosaicML built tools for training large language and diffusion models efficiently on commodity GPUs, releasing the MPT-7B and MPT-30B open-source models in 2023. Databricks acquired the company in July 2023 for roughly $1.3B, folding MosaicML's stack into the Databricks platform as the basis for what later became DBRX and the Mosaic AI training service. The standalone MosaicML brand was retired; the team and tech continue inside Databricks.
Acquisition Details
Databricks closed the $1.3B acquisition in July 2023 and folded MosaicML into its Mosaic AI brand. The original site redirects.
🩺 Health Signals
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📅 Timeline
MosaicML launches with $37M Series A
https://techcrunch.com/2021/10/13/mosaicml-emerges-with-tools-to-make-training-machine-learning-models-faster/
Releases open-source MPT-7B model
https://www.databricks.com/blog/mpt-7b
Databricks acquires MosaicML for $1.3B
https://www.databricks.com/company/newsroom/press-releases/databricks-signs-definitive-agreement-acquire-mosaicml-leading-generative-ai
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❓ Frequently Asked Questions
Is MosaicML still a separate product?
No. Databricks completed the acquisition in 2023 and rebranded the offering as Mosaic AI inside the Databricks platform.
Are MPT models still maintained?
The MPT line was effectively replaced by Databricks' DBRX in 2024. MPT weights remain on Hugging Face but are not getting updates.
Can I still use the Composer library?
Yes. Composer and Streaming are open-source and actively maintained under the Mosaic GitHub org owned by Databricks.
Was MosaicML profitable when acquired?
Reported revenue at acquisition was modest (single-digit millions). Databricks bought the team and tech, not the revenue.