Dev tools · alternatives · 2026

24 alternatives to Bucket4J

Rate-limiting based on token bucket algorithm for Java

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Bucket4J launched in 2021; newer entries below may have overtaken it.

1
Rately▲175
Take control of your API traffic with custom rate limits.
Oct 2025 · its alternatives →
2NB
New BucketRateLimiter Python package to rate limit requests to APIs▲25
2022 · pypi.org · its alternatives →
3DR
Distributed Rate Limiter – 50K+ RPS, Redis-Backed, Production-Ready▲5
Hi HN! I built a distributed rate limiter using the token bucket algorithm with Redis backing. Key highlights: • 50,000+ requests/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/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…
Sep 2025 · github.com · its alternatives →
4
Apidog Fast Request▲512
Develop APIs fast + automatically detect endpoints
2025 · fastrequest.apidog.com · its alternatives →
5AF
A fast JSON library for Go▲119
2021 · github.com · its alternatives →
6
FluxNinja Aperture▲193
A simple API for rate limiting, caching, prioritization
2024 · its alternatives →
7
Rate Limiting by Cloudflare▲6
Protect against DDoS and other types of abusive behavior
2017 · its alternatives →
8
MCP-Billing▲112
OAuth 2.1 + usage-based Stripe billing for MCP servers
Jul 2026 · mcp-billing.com · its alternatives →
9GR
Golimit – Ringpop-based distributed and decentralized rate limiter▲53
2018 · github.com · its alternatives →
10LS
Limitd – simple daemon for rate limiting HA applications▲15
2015 · github.com · its alternatives →
11
RateLimit.Org▲6
Avoid 429 error by limiting requests made per time frame
2023 · its alternatives →
12GA
Goralim - a rate limiting pkg for Go to handle distributed workloads▲69
2024 · github.com · its alternatives →
13RA
RateLimitAPI – API for rate limiting in distributed environments▲5
2023 · ratelimitapi.com · its alternatives →
14RL
Rate limiting, caching and request prioritization for AI apps▲10
Generative AI applications pose a unique challenge in production. They are computationally intensive and orders of magnitude slower than traditional data-intensive applications. Scaling these applications is further complicated by expensive hardware requirements and GPU shortages. Consequently, developers are scrambling to implement home-grown caching and rate-limiting solutions, which are error-prone and difficult to get right. FluxNinja Aperture delivers a production-grade experience with a purpose-built load management platform that provides rate & concurrency limiting, caching, and…
2024 · fluxninja.com · its alternatives →
15JA
Javalin, a Java/Kotlin REST API Framework▲50
2017 · javalin.io · its alternatives →
16
AKM▲2
Rate-limit aware smart API key scheduling
Apr 2026 · amon20044.github.io · its alternatives →
17
Limitify▲13
Api rate limitter and usage tracker
2025 · its alternatives →
18HA
HTTPLang – a scripting language for making HTTP requests▲44
2015 · github.com · its alternatives →
19AU
A usage circuit breaker for Cloudflare Workers▲29
I run 3mins.news (https://3mins.news), an AI news aggregator built entirely on Cloudflare Workers. The backend has 10+ cron triggers running every few minutes: RSS fetching, article clustering, LLM calls, email delivery. The problem: Workers Paid Plan has hard monthly limits (10M requests, 1M KV writes, 1M queue ops, etc.). There's no built-in "pause when you hit the limit", CF just starts billing overages. KV writes cost $5/M over the cap, so a retry loop bug can get expensive fast. AWS has Budget Alerts, but those are passive notifications, by the time you read the email,…
Mar 2026 · its alternatives →
20RC
Redis-cell, an API rate limiter as a Redis module, written in Rust▲15
2016 · github.com · its alternatives →
21
SigMap – 81.1% retrieval hit 5, 96.9% token reduce,zero deps▲14
~97% token reduction for AI coding sessions — zero deps, 33 languages, MCP server - manojmallick/sigmap
Apr 2026 · github.com · its alternatives →
22
Built SecureFlow API rate limiting .▲1
API
Jun 2026 · its alternatives →
23CE
ClusterK – EC2 AWS spot orchestration service▲25
Dear startups, We've recently launched our service that helps deploy capacity across AWS EC2 spot to provide high availability and up to 90% discount on compute. Magic happens by us predicting spot prices and distributing capacity across dozens of uncorrelated Spot auctions to limit exposure to possible price spikes. As serial entrepreneurs we know first hand how important it is to iterate quickly and reducing the compute cost is one of the ways to approach it. If your company's AWS bill is significant (>$10k/month) and you have an interesting use case that we can discuss - we'd be…
2015 · its alternatives →
24
A simple pricing and resource limit library▲5
Hey Hacker News! No one likes to code pricing; it sucks. It shouldn't take up my time, yet it always does - too much of it. And pricing always needs to change, eating up valuable dev hours. I created a simple pricing engine so that I could write all of my pricing rules & resource limits in a single YAML doc, then enforce them everywhere with a single policy check. It's simple, intuitive, versionable, auditable, and easy to reason about or change quickly without bogging my development down. My CTO friends liked the idea and wanted to use it, so I created this open-source library for everyone…
Feb 2026 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →