Go EuropeAIdirectory

Evidence-backed European AI register

Composo

Reviewed identity, roles, model listings, pricing and evidence for Composo.

Dataset compiled 2026-08-28 · evidence over inference

HQ Europe: Yesplatform4 model listings0 token-price rows

Reviewed identity

Headquarters scope
European non-EU headquarters
Headquarters record
London
Legal entity
Composo Limited, UK private limited company no. 15068665
Ownership
VC-backed private
Founded
2023
Confidence
high
Last verified
2026-08-28

Links

Official website

Open interactive profile

Evidence boundaries

Organisation listings identify a reviewed canonical record. Model listings show an association in the source register; they do not by themselves establish model creation, current API availability, hosting location or infrastructure ownership.

Model listings

  1. align-20251111catalogued with this organisation · origin not asserted
    Type
    text
    Parameters
    unknown
    Context
    350,000 tokens
    Languages
    all major languages plus code (vendor claim)
    Licence
    proprietary
    Release
    2025-11
  2. align-lightning-20250731catalogued with this organisation · origin not asserted
    Type
    text
    Parameters
    unknown
    Context
    200,000 tokens
    Languages
    all major languages plus code (vendor claim)
    Licence
    proprietary
    Release
    2025-07
  3. align-20260109catalogued with this organisation · origin not asserted
    Type
    text
    Parameters
    unknown
    Context
    120,000 tokens
    Languages
    all major languages plus code (vendor claim)
    Licence
    proprietary
    Release
    2026-01
  4. align-lightning-20251127catalogued with this organisation · origin not asserted
    Type
    text
    Parameters
    unknown
    Context
    32,000 tokens
    Languages
    all major languages plus code (vendor claim)
    Licence
    proprietary
    Release
    2025-11

Profile note

Evaluation platform for LLM applications, RAG and agents. Its documented POST /api/v1/evals/reward endpoint scores supplied LLM output against criteria on a 0–1 scale using proprietary Composo Align/Align Lightning evaluation models. This is an evaluation API, not general-purpose LLM inference serving; classify only as platform.

Record sources

  1. https://find-and-update.company-information.service.gov.uk/company/15068665
  2. https://techcrunch.com/2025/02/07/composo-helps-enterprises-monitor-how-well-ai-apps-work/
  3. https://docs.composo.ai/documentation/getting-started/quickstart
  4. https://docs.composo.ai/documentation/getting-started/models
  5. https://docs.composo.ai/api-reference/evals/reward
  6. https://docs.composo.ai/documentation/FAQs/common-questions
  7. https://docs.composo.ai/documentation/getting-started/regions
  8. https://www.composo.ai/enterprise/
  9. https://www.composo.ai/security