Bucket4J

What it does

Java rate-limiting library based on the token-bucket algorithm. The library includes many huge features to provide rate-limiting to your API.

• 
  RatelyOct 2025 · ▲175

  Take control of your API traffic with custom rate limits.

• NB
  New BucketRateLimiter Python package to rate limit requests to APIs2022 · pypi.org · ▲25
• DR
  Distributed Rate Limiter – 50K+ RPS, Redis-Backed, Production-ReadySep 2025 · github.com · ▲5

  Hi HN! I built a distributed rate limiter using the token bucket algorithm with Redis backing. Key highlights: • 50,000+ requests&#x2F;second throughput with <2ms P95 latency • Redis-backed distributed state for multi-instance deployments • 18 REST API endpoints for rate limiting, config, and monitoring • 265+ tests including load tests and integration tests • Docker&#x2F;Kubernetes ready with comprehensive documentation Built with Java 21 + Spring Boot. Perfect for protecting APIs, microservices, or SaaS platforms from abuse. The pain point I solved: existing solutions were either too…

• AF
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