Clusterk

ClusterK was a cloud cost-optimization startup founded in 2013 in Palo Alto, California by Dmitry Pushkarev. Its software let AWS users run production and batch workloads on Amazon EC2 Spot Instances at up to 90% savings versus on-demand pricing, by predicting spot-market prices and continuously rebalancing capacity across instance types. ClusterK shipped two products: ClusterK Balancer, which arbitraged the AWS Spot Market for cost savings, and ClusterK Cirrus, a cloud-native HPC grid scheduler. The company was backed by DCVC (Data Collective), Rally Ventures, and the Mayo Clinic Business Accelerator, raising roughly $1.2M. Amazon acquired ClusterK in April 2015 and absorbed the team and technology into AWS; the company no longer operates independently and publishes no public API, SDK, or developer surface. This profile is retained as a historical portfolio-company record.

Clusterk is profiled on the APIs.io network. Tagged areas include Company, Cloud, Cloud Computing, Cost Optimization, and EC2 Spot Instances.

📡 Source on GitHub

5.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Cloud Cloud Computing Cost OptimizationEC2 Spot InstancesHPC FinOps Acquired

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 5.0/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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Resources

Company 1

The organization behind the API

InvestorProfile

InvestorProfile

Source (apis.yml)

aid: clusterk
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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/clusterk.png
name: Clusterk
description: 'ClusterK was a cloud cost-optimization startup founded in 2013 in Palo Alto, California by Dmitry Pushkarev.
  Its software let AWS users run production and batch workloads on Amazon EC2 Spot Instances at up to 90% savings versus on-demand
  pricing, by predicting spot-market prices and continuously rebalancing capacity across instance types. ClusterK shipped
  two products: ClusterK Balancer, which arbitraged the AWS Spot Market for cost savings, and ClusterK Cirrus, a cloud-native
  HPC grid scheduler. The company was backed by DCVC (Data Collective), Rally Ventures, and the Mayo Clinic Business Accelerator,
  raising roughly $1.2M. Amazon acquired ClusterK in April 2015 and absorbed the team and technology into AWS; the company
  no longer operates independently and publishes no public API, SDK, or developer surface. This profile is retained as a historical
  portfolio-company record.'
url: https://raw.githubusercontent.com/api-evangelist/clusterk/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
- rally-ventures
- mayo-clinic-business-accelerator
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: amazon
x-acquired-year: 2015
x-founded-year: 2013
x-headquarters: Palo Alto, California, United States
x-founders:
- Dmitry Pushkarev
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Cloud
- Cloud Computing
- Cost Optimization
- AWS
- EC2 Spot Instances
- HPC
- FinOps
- Acquired
apis: []
common:
- type: InvestorProfile
  name: DCVC Portfolio Profile
  url: https://www.dcvc.com/companies/clusterk/
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

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