Concord Systems website screenshot

Concord Systems

Concord Systems was a Brooklyn, New York stream-processing company founded in December 2014 by Alexander Gallego and Emilio Del Tesoro, and backed by Bloomberg Beta. It built a high-performance distributed stream processing framework written in C++ on top of Apache Mesos, aimed at letting application developers and data scientists write real-time streaming computations ("operators") in the language of their choice — Python, Ruby, Go, Java/Scala, Node.js or Haskell — with Kafka and Amazon Kinesis connectors and a CLI for deploying topologies. Akamai Technologies acquired the company in an all-cash transaction in September 2016 and folded the technology into its IoT edge data platform for real-time messaging and log processing. The company is discontinued: concord.io is parked and the documentation site is gone. Its interface was a Thrift-based operator driver API rather than an HTTP/REST API, so there is no OpenAPI or event surface to catalog; the surviving first-party developer artifacts are the github.com/concord organization and the client libraries still published on PyPI, RubyGems and pkg.go.dev.

Concord Systems is profiled on the APIs.io network. Tagged areas include Company, Stream Processing, Real-Time, Data Processing, and Big Data.

Concord Systems’ developer surface includes CLI and 5 more developer resources.

📡 Source on GitHub
9.3/100 minimal ▬ flat Agent 0/100 human only library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
0 APIs
CompanyStream ProcessingReal-TimeData ProcessingBig DataDistributed SystemsApache MesosKafkaOpen-SourceDiscontinued

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 9.3/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 2.9 / 20
Access Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Contract Governance 0.0 / 12
Discoverability 5.7 / 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.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/concord-systems: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Source (apis.yml)

apis.yml Raw ↑ 
aid: concord-systems
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  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/concord-systems.png
name: Concord Systems
description: 'Concord Systems was a Brooklyn, New York stream-processing company founded in December 2014 by Alexander Gallego
  and Emilio Del Tesoro, and backed by Bloomberg Beta. It built a high-performance distributed stream processing framework
  written in C++ on top of Apache Mesos, aimed at letting application developers and data scientists write real-time streaming
  computations ("operators") in the language of their choice — Python, Ruby, Go, Java/Scala, Node.js or Haskell — with Kafka
  and Amazon Kinesis connectors and a CLI for deploying topologies. Akamai Technologies acquired the company in an all-cash
  transaction in September 2016 and folded the technology into its IoT edge data platform for real-time messaging and log
  processing. The company is discontinued: concord.io is parked and the documentation site is gone. Its interface was a Thrift-based
  operator driver API rather than an HTTP/REST API, so there is no OpenAPI or event surface to catalog; the surviving first-party
  developer artifacts are the github.com/concord organization and the client libraries still published on PyPI, RubyGems and
  pkg.go.dev.'
url: https://raw.githubusercontent.com/api-evangelist/concord-systems/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bloomberg-beta
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: Akamai Technologies
x-acquired-date: '2016-09-23'
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Stream Processing
- Real-Time
- Data Processing
- Big Data
- Distributed Systems
- Apache Mesos
- Kafka
- Open-Source
- Discontinued
tags_raw:
- Company
- Stream Processing
- Real Time
- Data Processing
- Big Data
- Distributed Systems
- Apache Mesos
- Kafka
- Open Source
- Discontinued
apis: []
common:
- type: GitHubOrganization
  name: GitHub Organization
  url: https://github.com/concord
- type: Packages
  name: Packages
  url: packages/concord-systems-packages.yml
- type: SDKs
  name: SDKs
  url: packages/concord-systems-packages.yml
- type: CLI
  name: CLI
  url: cli/concord-systems-cli.yml
- type: Lifecycle
  name: Lifecycle
  url: lifecycle/concord-systems-lifecycle.yml
- type: LLMsTxt
  name: llms.txt
  url: llms/concord-systems-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 4
  pass: local-v1

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