Buoyant Enterprise for Linkerd vs Flomesh Service Mesh

Buoyant Enterprise for Linkerd (BEL) is Buoyant’s enterprise distribution of Linkerd, a service mesh for Kubernetes. It encrypts meshed traffic with mutual TLS and offers latency-based load balancing, timeouts, retries, circuit breaking, gRPC load balancing and blue-green or canary deployments. It supports communication across clusters, federated services and automatic cross-cluster failover. Observability includes layer 7 success-rate and latency metrics, Prometheus-compatible metric exports and OpenTelemetry tracing. High Availability Zone-aware Load Balancing keeps requests in-zone under normal load and sends them to other zones when local endpoints are overloaded or return errors. Supported environments include Kubernetes and managed or self-hosted distributions such as Amazon EKS, Google GKE, Microsoft Azure AKS, Oracle OKE, Rancher RKE2 and Red Hat OpenShift. Linux VM workloads are supported in Premium and Strategic; the product also describes management of non-Kubernetes workloads including Windows VMs. It is free to try, and companies with fewer than 50 employees can use it in production at any scale. Premium and Strategic pricing is available by request.

Flomesh Service Mesh (FSM) provides traffic management and service governance for microservices running on Kubernetes. It uses the Flomesh Pipy proxy, which is automatically added as a sidecar to onboarded applications. FSM supports traffic shifting, ingress and egress, and Kubernetes Gateway API capabilities, along with HTTP, TCP, gRPC and MQTT traffic. For service security, it enables mutual TLS and fine-grained access policies. Certificate management can use Tresor, cert-manager or HashiCorp Vault. Documentation marks Prometheus and Grafana integrations as stable and Jaeger distributed tracing as beta; integration guides also cover Dapr and discovery registries such as Consul, Eureka and Nacos. FSM supports x86 and ARM architectures and multi-cluster Kubernetes connectivity through the MCS API, though multicluster is marked alpha. It is open source, free and self-hosted, with Kubernetes and OpenShift listed. Installation requires Kubernetes 1.19 or later; version 1.1 is listed for Kubernetes 1.19 through 1.24.