Cilium is open-source software for providing and transparently securing network connectivity and load balancing between application workloads.
Best Flannel Alternatives ranked by AI · updated May 2025
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Flannel is a simple and easy-to-use network fabric for Kubernetes.
Price: Free
Top 4 Flannel alternatives
MetalLB is an open-source load-balancer implementation for bare-metal and other Kubernetes clusters without a cloud provider integration. It assigns external IPs to...
Pros
- Native Kubernetes LoadBalancer integration for bare-metal clusters
- Supports both Layer 2 and BGP advertisement modes
- Works with common network equipment and private IP address pools
Cons
- Requires careful IP-pool and network advertisement planning
- BGP mode needs compatible routers and networking expertise
- Does not provide advanced application-layer routing by itself
Free, open source
3
Calico provides secure network connectivity for containers and virtual machines.
Pros
- Easy to use
- Scalable
Cons
- Limited feature set compared to Cilium
Weave Net creates a virtual network that connects Docker containers across multiple hosts.
Pros
- Simple setup
- Good for multi-host environments
Cons
- Less feature-rich compared to Cilium
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