aid: rondo-energy
name: Rondo Energy
description: 'Rondo Energy is an Alameda, California industrial decarbonization company
  led by CEO John O''Donnell that builds the Rondo Heat Battery (RHB), a thermal energy
  storage system that converts intermittent wind and solar electricity into heat stored
  in thousands of tons of refractory brick at temperatures up to 1,500C and returns
  it as continuous steam, thermal oil, superheated air, or combined heat and power
  at rated outputs from 2MWth to over 100MWth. The RHB is sold as a drop-in replacement
  for a fossil-fuel boiler, via capital purchase, lease, or heat purchase agreement,
  into cement, food and beverage, chemicals, fuels and ethanol, textiles, pulp and
  paper, mining, pharmaceuticals, and direct air capture. Rondo operates the world''s
  largest industrial heat battery and has announced a 90GWh factory plan with Siam
  Cement Group, backed by Breakthrough Energy Ventures and Catalyst, Energy Impact
  Partners, Microsoft''s Climate Innovation Fund, Rio Tinto, SABIC, Aramco Ventures,
  and the European Investment Bank. Rondo sells hardware and delivered heat, not software:
  it publishes no developer portal, API reference, or machine-readable specification.'
image: https://www.rondo.com/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/rondo-energy/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-source-url: https://forgeglobal.com/rondo-energy_stock/
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-05'
modified: '2026-08-05'
tags:
- Company
- Energy
- Energy Storage
- Thermal Energy Storage
- Industrial Heat
- Decarbonization
- Climate Tech
- Renewable Energy
- Manufacturing
- Hardware
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.rondo.com/
- type: Blog
  url: https://www.rondo.com/news-press
- type: Support
  url: https://www.rondo.com/contact
- type: PrivacyPolicy
  url: https://www.rondo.com/privacy-policy
- type: TermsOfService
  url: https://www.rondo.com/purchase-order-terms-conditions
- type: LinkedIn
  url: https://www.linkedin.com/company/rondo-energy/
- type: DomainSecurity
  url: security/rondo-energy-domain-security.yml
- type: Conformance
  url: conformance/rondo-energy-conformance.yml
- type: LLMsTxt
  url: llms/rondo-energy-llms.txt
x-enrichment:
  date: '2026-08-05'
  status: minimal
  artifacts_added: 4
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: >-
    Rondo Energy sells a physical product - a refractory-brick industrial heat
    battery, bought outright, leased, or paid for as delivered steam - and its
    entire web surface is a 44-page Next.js marketing site plus a Jetty login
    portal; there is no developer section, no API host (api/developer/docs
    .rondo.com do not resolve), and the one identity host that exists,
    login.rondo.com, is an Okta custom domain whose TLS certificate does not
    match the name.
  evidence:
  - url: https://www.rondo.com/openapi.json
    status: 404
  - url: https://www.rondo.com/docs
    status: 404
  - url: https://www.rondo.com/llms.txt
    status: 404
  - url: https://www.rondo.com/.well-known/agent-card.json
    status: 404
  - url: https://portal.rondo.com/web/home
    status: 302
  - url: https://www.rondo.com/sitemap.xml
    status: 200
  checked: '2026-08-05'