Source: https://seerepo.com/compare/apache/druid/vs/Stirling-Tools/Stirling-PDF
Markdown source: https://seerepo.com/compare/apache/druid/vs/Stirling-Tools/Stirling-PDF.md
Description: druid and Stirling-PDF share 6 technologies: PostgreSQL, s3, com.github.ben-manes.caffeine:caffeine, React, com.opencsv:opencsv, and Hibernate. druid is written in Java and Stirling-PDF in TypeScript.

# druid vs Stirling-PDF

druid and Stirling-PDF share 6 technologies: PostgreSQL, s3, com.github.ben-manes.caffeine:caffeine, React, com.opencsv:opencsv, and Hibernate. druid is written in Java and Stirling-PDF in TypeScript.

- [apache/druid](https://seerepo.com/r/apache/druid): Apache Druid: a high performance real-time analytics database.
- [Stirling-Tools/Stirling-PDF](https://seerepo.com/r/Stirling-Tools/Stirling-PDF): #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

## What they share and what sets them apart

- In common: PostgreSQL, s3, com.github.ben-manes.caffeine:caffeine, React, com.opencsv:opencsv, Hibernate
- Only in druid: JAX-RS, apache-client, avatica-core, aws-crt-client, aws-msk-iam-auth, azure-sdk-bom, azure-storage-blob-batch, com.mysql:mysql-connector-j, curator-client, curator-recipes, druid-processing, glue, hadoop-aws, hadoop-common, hadoop-mapreduce-client-core, hive-storage-api, iceberg-core, iceberg-gcp, iceberg-hive-metastore, jedis, kafka-clients, kms, MariaDB, org.apache.hadoop:hadoop-hdfs-client, org.apache.hive:hive-metastore, s3-transfer-manager, org.apache.hadoop:hadoop-client-api, org.apache.iceberg:iceberg-api, com.azure:azure-storage-blob, org.apache.curator:curator-framework, org.apache.avro:avro, org.apache.commons:commons-dbcp2, software.amazon.awssdk:sdk-core, MySQL, org.apache.iceberg:iceberg-parquet, org.apache.orc:orc-core, org.apache.zookeeper:zookeeper, software.amazon.kinesis:amazon-kinesis-client, io.confluent:kafka-schema-registry-client, org.apache.parquet:parquet-hadoop, Hive, org.apache.arrow:arrow-vector, org.apache.derby:derby, org.apache.iceberg:iceberg-aws, software.amazon.awssdk:rds, grpc-bom, guice-assistedinject, jakarta.inject-api, javax.servlet-api, JetBrains, servlet-api, vertx-web, com.google.inject:guice, org.eclipse.jetty:jetty-server, org.eclipse.jetty:jetty-util, org.eclipse.jetty:jetty-http, org.eclipse.jetty.ee8:jetty-ee8-servlet, org.eclipse.jetty:jetty-io, jdbi, joou-java-6, hadoop-auth, jose4j, nimbus-jose-jwt, oauth2-oidc-sdk, ranger-plugins-common, software.amazon.awssdk:auth, org.pac4j:pac4j-core, org.pac4j:pac4j-oidc, com.azure:azure-identity, software.amazon.awssdk:sts, javax.activation-api, jakarta.validation:jakarta.validation-api, client-java, commons-logging, docker-java-bom, docker-java-core, io.opentelemetry.instrumentation:opentelemetry-instrumentation-bom-alpha, jcl-over-slf4j, jclouds-slf4j, kubernetes-httpclient-okhttp, log4j-1.2-api, log4j-layout-template-json, metrics-core, metrics-graphite, metrics-jmx, org.apache.logging.log4j:log4j-api, Prometheus, slf4j-simple, io.fabric8:kubernetes-client, io.kubernetes:client-java-api, org.slf4j:slf4j-api, org.apache.logging.log4j:log4j-core, software.amazon.awssdk:ec2, software.amazon.awssdk:regions, com.github.docker-java:docker-java, io.opentelemetry:opentelemetry-api, io.opentelemetry:opentelemetry-sdk, classnames, blueprintjs, CodeMirror, @lezer/highlight, d3-selection, echarts, TanStack, d3-axis, d3-scale, d3-shape, react-diff-viewer-continued, @blueprintjs/icons, d3-dsv
- Only in Stirling-PDF: org.springframework.boot:spring-boot-starter-web, H2 Database, jcache, org.springframework:spring-jdbc, spring-boot-starter-cache, spring-boot-starter-data-redis, url-connection-client, Apache, Postgres, AWS S3, PostHog, Telegram, jetty-http2-server, jakarta.servlet:jakarta.servlet-api, org.eclipse.jetty:jetty-alpn-java-server, org.eclipse.jetty.compression:jetty-compression-server, Vite, react-router-dom, Tauri, objc2-app-kit, objc2-foundation, Tokio, tiny_http, Supabase, tauri-plugin-store, Stripe, core-services, @tauri-apps/api, org.springframework.boot:spring-boot-starter-data-jpa, jjwt-impl, jjwt-jackson, org.springframework.boot:spring-boot-starter-security, spring-boot-starter-oauth2-resource-server, spring-boot-starter-security-oauth2-client, spring-security-saml2-service-provider, Spring, com.coveo:saml-client, io.jsonwebtoken:jjwt-api, onnxruntime, angus-mail, batik-transcoder, commonmark-ext-gfm-tables, imageio-batik, imageio-bmp, imageio-hdr, imageio-icns, imageio-iff, imageio-jpeg, imageio-pcx, imageio-pnm, imageio-psd, imageio-sgi, imageio-tga, imageio-thumbsdb, imageio-tiff, imageio-webp, imageio-xwd, jbig2-imageio, jpdfium, metadata-extractor, org.springframework.boot:spring-boot-starter-mail, outlook-module, owasp-java-html-sanitizer, pdfbox-io, preflight, stirling-office-convert, stirling-office-convert-legacy, stirling-office-convert-pdfa, stirling-office-convert-topdf, org.apache.pdfbox:pdfbox, org.verapdf:validation-model, jakarta.mail:jakarta.mail-api, org.apache.pdfbox:xmpbox, org.apache.poi:poi-ooxml, com.google.zxing:core, de.rototor.pdfbox:graphics2d, org.apache.xmlgraphics:batik-bridge, org.commonmark:commonmark, technology.tabula:tabula, com.github.junrar:junrar, com.hubspot.jinjava:jinjava, com.vladsch.flexmark:flexmark-html2md-converter, org.simplejavamail:simple-java-mail, micrometer-registry-prometheus, org.springframework.boot:spring-boot-starter-actuator, spring-boot-starter-jetty, io.micrometer:micrometer-core, ch.qos.logback:logback-classic, ch.qos.logback:logback-core, Tailwind CSS, fontsource, Mantine, @reactour/tour, @dnd-kit/core, tanstack, @atlaskit/pragmatic-drag-and-drop, D3, signature_pad, tauri-plugin-dialog, @tauri-apps/plugin-notification, react-easy-crop, react-rnd, recharts, tauri-plugin-notification, tauri-plugin-window-state, webview2-com, Lucide, keyring, embedpdf, pdfjs-dist, react-markdown, remark-gfm, @cantoo/pdf-lib, qrcode.react, objc2-pdf-kit, pixelmatch, log, tauri-plugin-log

## Side by side

| | druid | Stirling-PDF |
|---|---|---|
| Size | 2,120,060 lines written, 6,345 code files | 1,146,342 lines written, 4,358 code files |
| Who writes it | 0.1% of its commits signed by AI. With Claude Code, GitHub Copilot, and Cursor | 2.1% of its commits signed by AI. With GitHub Copilot, Claude Code, and Codex |
| Activity | Last push November 9, 2026, 14,850 commits, 14,096 stars | Last push November 9, 2026, 5,762 commits, 96,085 stars |
| Tests | 3,892 test files. 68.5% of its code files have a test that imports them | 2,121 test files. 49.4% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, druid or Stirling-PDF?

druid, with 2,120,060 lines written; Stirling-PDF has 1,146,342.

The proof: [apache/druid's code at commit 490cbf0](https://github.com/apache/druid/tree/490cbf0035e0c988c141ef146566706854811097)

### Which has more GitHub stars, druid or Stirling-PDF?

Stirling-PDF, with 96,085 stars; druid has 14,096.

The proof: [Stirling-Tools/Stirling-PDF on GitHub](https://github.com/Stirling-Tools/Stirling-PDF)

### Which has more tests, druid or Stirling-PDF?

druid, with 3,892 test files; Stirling-PDF has 2,121.

The proof: [apache/druid's code at commit 490cbf0](https://github.com/apache/druid/tree/490cbf0035e0c988c141ef146566706854811097)

### Which was updated more recently, druid or Stirling-PDF?

Both got their last push on November 9, 2026.

The proof: [apache/druid's commits on GitHub](https://github.com/apache/druid/commits)

### Which has more commits signed by AI, druid or Stirling-PDF?

Stirling-PDF: an AI signed 2.1% of its commits, with GitHub Copilot, Claude Code, and Codex; in druid, 0.1%.

The proof: [the commits each tool signed in Stirling-Tools/Stirling-PDF](https://seerepo.com/r/Stirling-Tools/Stirling-PDF/ai)

## Sources

- apache/druid: Read on November 9, 2026, at commit 490cbf0 (https://github.com/apache/druid/tree/490cbf0035e0c988c141ef146566706854811097)
- Stirling-Tools/Stirling-PDF: Read on November 9, 2026, at commit d745437 (https://github.com/Stirling-Tools/Stirling-PDF/tree/d74543712c8214548b823859c8dba4cf2e52a875)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.