generated: '2026-07-19'
method: searched
source: >-
  Lithium Technologies shutdown announcement (May 2018) as reported by TechCrunch and Search
  Engine Journal; live DNS/HTTP probes of klout.com, api.klout.com and developer.klout.com on
  2026-07-19.
status: retired
versioning:
  scheme: uri-path
  current: null
  last_known: v2
  note: >-
    The last public interface was the Klout API v2, served from api.klout.com. No versioning
    policy page survives; the version is attested by third-party client libraries that state
    they implement "the Klout REST API (v2+)".
deprecation:
  policy_url: null
  sunset_header: false
  note: >-
    No formal deprecation policy or RFC 8594 Sunset/Deprecation header support was ever
    published. The service and its API were retired together on a single announced date.
sunset:
  date: '2018-05-25'
  announced: '2018-05-10'
  announced_by: Lithium Technologies
  reason: >-
    Lithium CEO Pete Hess stated the Klout acquisition gave Lithium valuable AI and machine
    learning capabilities, but that Klout as a standalone service was not aligned with the
    company's long-term strategy. The retirement date coincided with the EU General Data
    Protection Regulation taking effect.
acquisition:
  acquired_by: Lithium Technologies
  date: '2014-03-27'
  amount_usd: 200000000
  successor_brand: Khoros
  note: >-
    Lithium Technologies was subsequently rebranded as Khoros. No successor product exposes the
    Klout Score or the Klout API.
sla:
  url: null
status_page: null
probes:
  - host: klout.com
    result: 'HTTP 301 to https://khoros.com/platform/klout, which 302s to khoros.ai and lands on the Khoros homepage; direct HTTPS to klout.com fails the TLS handshake.'
    checked: '2026-07-19'
  - host: api.klout.com
    result: NXDOMAIN — does not resolve
    checked: '2026-07-19'
  - host: developer.klout.com
    result: NXDOMAIN — does not resolve
    checked: '2026-07-19'
archive:
  url: https://web.archive.org/web/*/klout.com
  note: The retired site and developer documentation survive only in the Internet Archive.
deprecated_operations: []