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Top 5 Java rate-limiter Projects
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javaslang-circuitbreaker
Resilience4j is a fault tolerance library designed for Java8 and functional programming
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Kargo
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Project mention: Building AI Agents with Spring AI and Amazon Bedrock AgentCore - Part 6 Deploy MCP client on AgentCore Runtime using Spring AI AgentCore Starter | dev.to | 2026-06-22
Spring AI Starter also supports rate limiting. The starter includes built-in rate limiting using Bucket4j to protect against excessive requests. However, rate limiting is deactivated by default and will be active only if limits are defined in application.properties:
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Low-Level-Design
Low Level Designs of common data structures. These designs keep concurrency control, latency and throughput in mind. We use design patterns where applicable to make the code readable, extensible and testable. (by InterviewReady)
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distributed-rate-limiter
High-performance distributed rate limiter service with Redis backend. Supports token bucket and sliding window algorithms, dynamic configuration, and real-time metrics. Built for microservices architectures.
Project mention: Show HN: Production-ready rate limiter with Web Dashboard and 5 algorithms | news.ycombinator.com | 2025-10-23 -
AppSignal
Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Java rate-limiter discussion
Java rate-limiter related posts
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Boost API Performance During Peak Traffic: Tips & Tricks
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Implementing Rate Limiting in a Spring Boot API using Bucket4j
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Wednesday Links - Edition 2022-11-23
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Open-source library for rate-limiting in Java
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Java rate-limiting library
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Feign client Rate Limiting using Resilience4J
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Java rate-limiting library based on the token-bucket algorithm
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A note from our sponsor - AppSignal
www.appsignal.com | 7 Sep 2026
Index
What are some of the best open-source rate-limiter projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | javaslang-circuitbreaker | 10,754 |
| 2 | failsafe | 4,310 |
| 3 | bucket4j | 2,799 |
| 4 | Low-Level-Design | 880 |
| 5 | distributed-rate-limiter | 80 |
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