Concurrency Based Rate Limiting With Tier Specific Quotas

via “rate-limiting-and-throttling-with-multi-level-enforcement”

Unified API for 100+ LLM providers — OpenAI format, load balancing, spend tracking, proxy server.

Unique: Implements a hierarchical rate limiting system where limits cascade from organization → team → user, with per-model overrides. Uses Redis token bucket algorithm (increment counter, check against limit, decrement on success) with configurable window sizes (minute, hour, day). Supports both request-count limits and token-consumption limits, enabling fine-grained control over LLM usage.

vs others: More granular than API Gateway rate limiting (which typically only does per-IP); supports token-based limits unlike request-count-only systems; hierarchical enforcement is unique vs flat rate limit structures