# Lightning AI

> Lightning AI builds open-source machine-learning tools and a commercial AI cloud for coding, training, fine-tuning and serving models. Its January 2026 merger with GPU infrastructure provider Voltage Park combined its software with owned compute capacity; customers range from research teams and startups to enterprises.

- **Founded:** 2019
- **Headquarters:** New York, United States
- **Founders:** William Falcon (Co-founder and CEO), Luis Capelo (Co-founder; former CTO)
- **Products:** PyTorch Lightning, Lightning AI Studio, Lightning Fabric, LitGPT, LitServe
- **Notable:** Released PyTorch Lightning as open source in 2019., Launched browser-based Studios in December 2023., Raised a $50 million equity investment in November 2024.

## Products & services

- **PyTorch Lightning** — Open-source framework that organizes PyTorch training code and handles training infrastructure, including distributed execution.
- **Lightning AI Studio** — Persistent collaborative cloud development environments for coding, debugging, training and deploying AI, accessed through a browser or local IDE.
- **Lightning Fabric** — Open-source tooling for scaling custom PyTorch training loops while retaining control over the loop.
- **LitGPT** — Open-source recipes and implementations for pretraining, fine-tuning and deploying language models.
- **LitServe** — Open-source Python framework for custom inference servers, batching and scaling.
- **GPU cloud and managed clusters** — On-demand and reserved GPU infrastructure plus managed cluster services, expanded through the Voltage Park merger.

## Achievements

- Released PyTorch Lightning as open source in 2019.
- Launched browser-based Studios in December 2023.
- Raised a $50 million equity investment in November 2024.
- Combined with Voltage Park in January 2026, bringing access to a reported 36,000+ owned GPUs.
- Named to Inc. Best in Business in Software for 2024.

## Latest updates

- **2026-10** — October 16 notice disclosed unauthorized credential access detected October 15, followed by suspension of all Studio platform access. The public notice still describes an active investigation and platform inaccessibility as checked October 25; GPU cluster rentals and managed Kubernetes/Slurm are outside its stated scope.
- **2026-09** — Pangram customer account reports estimated 2–3 engineer-years and 50–60% compute savings; these are customer estimates rather than general guarantees.
- **2026-09** — Lightning and Google Cloud reported checkpoint write-time reductions of up to 95% on Rapid Buckets under their tested conditions.
- **2026-09** — Monthly recap announced Betty Junod as CMO and Heather Paduck as CFO and discussed H100-to-H200 fleet upgrades.
- **2026-01** — Lightning AI and Voltage Park completed their merger, operating under the Lightning AI name.

## Links

- Website: https://lightning.ai/
- LinkedIn: https://www.linkedin.com/company/pytorch-lightning/
- Twitter/X: https://x.com/LightningAI
- GitHub: https://github.com/Lightning-AI
- YouTube: https://www.youtube.com/c/PyTorchLightning
- Facebook: https://www.facebook.com/lightningAI

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Profile page: https://yespress.io/lightning-ai
Published by YesPress — https://yespress.io
Last updated: 2026-10-25