Java projects that answer outside pull requests

In the Porchlamp snapshot of 17 October 2026.

Porchlamp ranks 283 Java projects by what happens to a stranger's pull request. Among the 241 judged Maven projects, 13.7% left most outside pull requests unanswered for two weeks, against 19.9% across all six ecosystems.

The top 50

The table lists the top 50 by the balanced ranking. Each name opens that project's page.

Top 50 Java projects by the balanced ranking
Rank	Project	Score	Tier
1	keycloak/keycloak	72.36	A (capped)
2	agentscope-ai/agentscope-java	71.24	A (capped)
3	logisim-evolution/logisim-evolution	70.17	A (capped)
4	floci-io/floci	69.41	B (capped)
5	opensearch-project/OpenSearch	68.84	B (capped)
6	plantuml/plantuml	68.17	B
7	strimzi/strimzi-kafka-operator	68.14	B
8	Stirling-Tools/Stirling-PDF	67.81	B (capped)
9	DependencyTrack/dependency-track	67.69	B (capped)
10	checkstyle/checkstyle	66.96	B
11	JSQLParser/JSqlParser	66.84	B
12	apache/dolphinscheduler	66.50	B
13	apache/hertzbeat	66.35	B
14	apache/seatunnel	66.19	B
15	grimmory-tools/grimmory	65.87	B (capped)
16	apache/calcite	65.78	B
17	dbeaver/dbeaver	65.78	B (capped)
18	apache/iceberg	65.54	B (capped)
19	spotbugs/spotbugs	65.44	B
20	elastic/elasticsearch	65.24	B (capped)
21	apache/hudi	65.22	B (capped)
22	apache/druid	64.50	B
23	bazelbuild/bazel	64.47	B (capped)
24	eclipse-vertx/vert.x	64.41	B
25	junit-team/junit-framework	64.40	B
26	apache/shenyu	64.14	B
27	apolloconfig/apollo	63.91	B
28	apache/lucene	63.83	B (capped)
29	apache/fory	63.76	B (capped)
30	libgdx/libgdx	63.73	B
31	JabRef/jabref	63.71	B (capped)
32	apache/pinot	63.47	B (capped)
33	grpc/grpc-java	63.27	B
34	apache/beam	63.20	B (capped)
35	quarkusio/quarkus	63.17	B
36	questdb/questdb	63.13	B (capped)
37	apache/incubator-seata	63.10	B
38	mockito/mockito	63.06	B
39	redis/lettuce	63.05	B
40	liquibase/liquibase	63.00	B
41	trinodb/trino	62.72	B
42	Activiti/Activiti	62.70	B
43	crimera/piko	62.61	B
44	vespa-engine/vespa	62.56	B (capped)
45	apache/incubator-kie	62.54	B
46	spinnaker/spinnaker	62.51	B (capped)
47	PaperMC/Paper	62.40	B
48	oshi/oshi	62.38	B
49	StarRocks/starrocks	62.32	B (capped)
50	TheAlgorithms/Java	62.22	B

Method and data

How every number is measured: Porchlamp methodology.
Why stars do not decide it: the black-hole report.
All 4,322 ranked projects as a table: porchlamp-2026-10-17-ranked.csv. Released under CC BY 4.0.