aid: bitfusion-io
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/bitfusion-io.png
name: Bitfusion Io
description: Bitfusion (bitfusion.io) was an Austin, Texas startup, backed by DCVC, that built
  "elastic AI" infrastructure software. Its FlexDirect platform was a transparent GPU/CPU
  virtualization layer that pooled network-attached accelerators (GPUs, FPGAs, ASICs) across
  TCP, RoCE, and InfiniBand into a single elastic compute cluster for sharing, scaling, and
  management of AI/ML workloads. VMware acquired Bitfusion in 2019 and folded FlexDirect into
  vSphere as vSphere Bitfusion (subsequently end-of-lifed). The independent company no longer
  operates, the bitfusion.io domain no longer resolves, and it exposes no public API, developer
  portal, or discoverable artifacts. Retained here as a DCVC portfolio record; defunct as an
  enrichment lead.
url: https://raw.githubusercontent.com/api-evangelist/bitfusion-io/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-reason: acquired-by-vmware-2019-domain-unresolved
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- GPU Virtualization
- Artificial Intelligence
- Machine Learning
- Infrastructure
- Acquired
- Defunct
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence