Horizon Quantum Computing

Horizon Quantum Computing is a Singapore-based quantum software company founded in 2018 by Dr. Joe Fitzsimons. It builds software infrastructure for quantum applications, centered on Triple Alpha, an integrated development environment that lets developers write hardware-agnostic quantum programs at multiple levels of abstraction and deploy them to quantum processors. Triple Alpha's final workflow step packages a program and deploys it as an API so developers can invoke quantum backends from Python scripts, web pages, and other technologies. Horizon operates its own quantum computing testbed at its Singapore headquarters and supports a range of external quantum processors, aiming to bridge the gap between today's quantum hardware and real-world applications. The company does not currently publish a public developer API, OpenAPI specification, or client SDK; API-based program deployment is offered to early-access users of the Triple Alpha platform.

Horizon Quantum Computing is profiled on the APIs.io network. Tagged areas include Company, Quantum Computing, Quantum Software, Developer Tools, and Integrated Development Environment.

Horizon Quantum Computing’s developer surface includes signup flow, engineering blog, support, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyQuantum ComputingQuantum SoftwareDeveloper ToolsIntegrated Development EnvironmentCompilerDeep TechSingapore

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 14.9/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.3 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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

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Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: horizon-quantum-computing
name: Horizon Quantum Computing
description: Horizon Quantum Computing is a Singapore-based quantum software company founded in 2018 by Dr. Joe Fitzsimons.
  It builds software infrastructure for quantum applications, centered on Triple Alpha, an integrated development environment
  that lets developers write hardware-agnostic quantum programs at multiple levels of abstraction and deploy them to quantum
  processors. Triple Alpha's final workflow step packages a program and deploys it as an API so developers can invoke quantum
  backends from Python scripts, web pages, and other technologies. Horizon operates its own quantum computing testbed at its
  Singapore headquarters and supports a range of external quantum processors, aiming to bridge the gap between today's quantum
  hardware and real-world applications. The company does not currently publish a public developer API, OpenAPI specification,
  or client SDK; API-based program deployment is offered to early-access users of the Triple Alpha platform.
url: https://raw.githubusercontent.com/api-evangelist/horizon-quantum-computing/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- dcvc
x-tier: stub
x-tier-reason: portfolio-lead
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://horizon-v2.cdn.prismic.io/horizon-v2/aYElUd0YXLCxVSCT_logo-triple-alpha-framed.svg
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Quantum Computing
- Quantum Software
- Developer Tools
- Integrated Development Environment
- Compiler
- Deep Tech
- Singapore
apis: []
common:
- type: Website
  url: https://www.horizonquantum.com/
- type: SignUp
  url: https://www.horizonquantum.com/product/early-access
- type: Blog
  url: https://www.horizonquantum.com/resources/blog
- type: Support
  url: https://www.horizonquantum.com/company/contact
- type: TermsOfService
  url: https://www.horizonquantum.com/terms-of-use
- type: PrivacyPolicy
  url: https://www.horizonquantum.com/privacy-policy
- type: DomainSecurity
  url: security/horizon-quantum-computing-domain-security.yml
- type: LLMsTxt
  url: llms/horizon-quantum-computing-llms.txt
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