What is UltraBalancer?
UltraBalancer is a modern, high-performance load balancer built with Rust. It combines extreme throughput with an exceptional developer experience — everything you need to distribute traffic across your backends.High Performance
Handle 500k+ RPS with lock-free data structures and zero-copy I/O
One-Command Setup
ultrabalancer dashboard --start - instant Grafana + Prometheus7 Algorithms
Round-robin, least-connections, IP-hash, weighted, random, power-of-two, fastest-response
Production Ready
TLS termination, rate limiting, sticky sessions, circuit breakers
Features
Load Balancing
Load Balancing
- Round Robin - Equal distribution across backends
- Least Connections - Route to least busy backend
- IP Hash - Consistent hashing for session affinity
- Weighted - Priority-based distribution
- Random - Stochastic distribution
- Power of Two - Pick 2 random, use least loaded
- Fastest Response - Route to fastest recent responder
Protocol Support
Protocol Support
- HTTP/1.1 with keep-alive connection pooling
- HTTP/2 multiplexing
- WebSocket full-duplex proxying
- TLS termination with rustls
Performance
Performance
- Response caching with TTL support
- Gzip, Brotli, and Zstd compression
- Graceful shutdown with connection draining
- Real-time metrics (p50, p95, p99 latencies)
Reliability
Reliability
- Automatic health checking
- Circuit breaker pattern
- Retry with exponential backoff
- Sticky sessions via cookies
Security
Security
- Global and per-IP rate limiting
- IP whitelist/blacklist with CIDR support
- X-API-Key authentication for admin API
- Request ID tracking for distributed tracing
Operations
Operations
- Prometheus metrics endpoint at
/prometheus - JSON metrics at
/metrics - Access logging (combined and JSON formats)
- Hot configuration reload
Why UltraBalancer?
Blazing Fast
500k+ RPS with zero-copy I/O and HTTP/2 multiplexing
All-in-One
Caching, compression, rate limiting, TLS — built in, no plugins
Easy Start
Single command to start. Config files for production.
Quick Example
One-Click Install
One-Command Monitoring
- Grafana: http://localhost:3000 (admin + auto-generated password)
- Prometheus: http://localhost:9090
Use Cases
High-Traffic APIs
Handle 500k+ RPS with built-in caching, compression, and rate limiting
Microservices
Health checking, circuit breakers, and sticky sessions for stateful services
Real-Time Apps
Full WebSocket proxying for chat, gaming, and live updates
Edge Deployments
TLS termination, IP filtering, and access logging at the edge
Performance
UltraBalancer delivers competitive performance with superior developer experience and built-in monitoring.
See benchmark details →
Get Started
Quickstart
Get running in 2 minutes
Installation
Install on your system
Configuration
Configure for production
Algorithms
Choose the right algorithm
Resources
GitHub
Source code and issues
Package Server
Downloads and install script
Contact
Get help and support