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flink vs OpenSearch

flink and OpenSearch share 12 technologies: apache-client, aws-crt-client, s3, Apache, org.apache.hadoop:hadoop-hdfs, software.amazon.awssdk:sts, commons-logging, io.opentelemetry:opentelemetry-exporter-logging, OpenTelemetry, org.apache.logging.log4j:log4j-api, org.apache.logging.log4j:log4j-core, and io.opentelemetry:opentelemetry-exporter-otlp. Both are written in Java.

Read it as markdown

What they share and what sets them apart

apache

flink

Apache Flink

Java26.5kRead on November 8, 2026, at commit 4fb928eWhat is flink built with?

Only in flink

  • aws-java-sdk-dynamodb
  • aws-java-sdk-s3
  • fastavro
  • hadoop-aliyun
  • hadoop-apache2
  • hadoop-aws
  • hadoop-azure
  • hadoop-common
  • hadoop-mapreduce-client-core
  • Hive
  • org.apache.hadoop:hadoop-hdfs-client
  • s3-transfer-manager
  • zookeeper
  • org.apache.avro:avro
  • org.apache.orc:orc-core
  • org.apache.parquet:parquet-hadoop
  • pyarrow
  • com.aliyun.oss:aliyun-sdk-oss
  • InfluxDB
  • io.confluent:kafka-schema-registry-client
  • org.apache.parquet:parquet-avro
  • com.facebook.presto:presto-hive
  • OpenAI
  • grpc-bom
  • org.jetbrains.kotlin:kotlin-stdlib
  • apache-beam
  • Angular
  • aws-java-sdk-sts
  • org.apache.hadoop:hadoop-minikdc
  • hadoop-yarn-common
  • kubernetes-httpclient-okhttp
  • log4j-layout-template-json
  • metrics-core
  • metrics-graphite
  • org.apache.logging.log4j:log4j-slf4j2-impl
  • Prometheus
  • org.slf4j:slf4j-api
  • io.fabric8:kubernetes-client
  • io.opentelemetry:opentelemetry-api

In common

opensearch-project

OpenSearch

🔎 Open source distributed and RESTful search engine.

Java14kRead on November 9, 2026, at commit 2923a00What is OpenSearch built with?

Only in OpenSearch

  • JAX-RS
  • arrow-c-data
  • arrow-memory-netty-buffer-patch
  • avro
  • aws-json-protocol
  • kafka-clients
  • lucene-memory
  • org.apache.arrow:flight-core
  • datafusion
  • object_store
  • arrow
  • software.amazon.awssdk:sdk-core
  • org.apache.hadoop:hadoop-client-api
  • org.apache.calcite.avatica:avatica-core
  • datafusion-datasource
  • com.azure:azure-storage-blob
  • software.amazon.awssdk:kms
  • org.ehcache:ehcache
  • foyer
  • grpc-services
  • JetBrains
  • servlet-api
  • Tokio
  • joou-java-6
  • com.google.auth:google-auth-library-oauth2-http
  • google-oauth-client
  • msal4j
  • nimbus-jose-jwt
  • oauth2-oidc-sdk
  • software.amazon.awssdk:auth
  • com.azure:azure-identity
  • compiler
  • jdom2
  • jsoup
  • mail
  • org.apache.james:apache-mime4j-dom
  • pdfbox-io
  • poi
  • poi-ooxml
  • poi-ooxml-lite
  • poi-scratchpad
  • tika-parsers
  • parquet
  • org.apache.tika:tika-core
  • org.apache.pdfbox:pdfbox
  • json-schema-validator
  • io.opentelemetry:opentelemetry-sdk-common
  • log4j-1.2-api
  • log4j-slf4j-impl
  • slf4j-api
  • log
  • software.amazon.awssdk:regions
  • io.opentelemetry:opentelemetry-sdk
  • software.amazon.awssdk:ec2
  • io.opentelemetry.semconv:opentelemetry-semconv

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
flink2,869,317 lines written9,840 code files
OpenSearch3,021,895 lines written8,159 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
flink0.4% of its commits signed by AIWith Claude Code
OpenSearch0% of its commits signed by AIWith Claude Code, Cursor, GitHub Copilot, and CodeRabbit
ActivityFrom GitHub and its history, on the day SeeRepo read it.
flinkLast push November 8, 202638,159 commits26,458 stars
OpenSearchLast push November 9, 202657,216 commits13,983 stars
TestsThe files that test the code, and the share of code files a test imports.
flink5,728 test files61.8% of its code files have a test that imports them
OpenSearch5,508 test files65.6% of its code files have a test that imports them

Frequently asked questions

Which is bigger, flink or OpenSearch?
OpenSearch, with 3,021,895 lines written; flink has 2,869,317.

The proof: opensearch-project/OpenSearch's code at commit 2923a00

Which has more GitHub stars, flink or OpenSearch?
flink, with 26,458 stars; OpenSearch has 13,983.

The proof: apache/flink on GitHub

Which has more tests, flink or OpenSearch?
flink, with 5,728 test files; OpenSearch has 5,508.

The proof: apache/flink's code at commit 4fb928e

Which was updated more recently, flink or OpenSearch?
OpenSearch: its last push was on November 9, 2026, and flink's on November 8, 2026.

The proof: opensearch-project/OpenSearch's commits on GitHub

Which has more commits signed by AI, flink or OpenSearch?
flink: an AI signed 0.4% of its commits, with Claude Code.

The proof: the commits each tool signed in apache/flink

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