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PureLB

Free#27 of 31 in Load Balancing Software

PureLB: A focused, open-source choice for Kubernetes service IP allocation on Linux. Ranked #27 of 31 in Load Balancing Software by our editors (6.6/10); pricing: Open source; best for kubernetes IP pool management.

6.6/10Editor score

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PureLB6.6 Visit PureLB

At a glance

Editor score
6.6 / 10
Pricing
Open source
Best for
Kubernetes IP pool management
Paid from
None
Facts checked
20 Sep 2026

Where it wins
- Open-source ServiceGroup pools for local and remote IP allocation
- Optional BGP, IPv4, IPv6, and dual-stack support
- Prometheus, kubectl, and NetBox capabilities for operations and IPAM
Where it doesn't
- Focused on Kubernetes service IP allocation rather than broad load balancing
- Self-hosted deployment requires a Linux-based Kubernetes environment
- BGP, remote pools, and traffic policies add configuration complexity

Our verdict on PureLB

PureLB is an open-source Kubernetes Service LoadBalancer for teams running clusters on Linux infrastructure, particularly bare-metal deployments. It allocates external service IP addresses from configured ServiceGroup pools and uses standard Linux networking to make those services reachable. The project supports local and remote address pools, Kubernetes Custom Resource Definition configuration, address sharing across services using different ports, and layer 4 routing. It is a strong fit for operators who need control over service address allocation inside their own Kubernetes environment rather than a managed load-balancing service.

Its main strength is the breadth of IP allocation options within that focused use case. PureLB supports IPv4, IPv6, and dual-stack deployments, with optional integrated BGP route advertisement for remote address pools. External traffic policy with Direct Server Return is available for remote pools, while Prometheus metrics cover pool and node-agent monitoring. A kubectl plugin adds operational visibility, and NetBox integration connects service address management with an IPAM workflow. These capabilities give platform teams several ways to align PureLB with existing routing, monitoring, and inventory practices.

PureLB is best suited to teams comfortable installing and operating self-hosted Kubernetes software and managing the surrounding Linux networking environment. Its scope is deliberately centered on assigning and exposing Kubernetes Service LoadBalancer addresses, so organizations seeking a broader application delivery platform or a managed service should consider alternatives. Teams that need Kubernetes-native IP pools, optional BGP, dual-stack support, and operational integrations should pick PureLB; teams wanting a hosted product with less infrastructure responsibility should look elsewhere.

PureLB pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on purelb.io

PureLB fact sheet

Free plan	Not verified
Paid from	None
Managed service	No
Layer 7 routing	Not verified
Layer 4 routing	Yes
Global traffic management	Not verified
TLS termination	Not verified
Backend limit	Not verified
Deployment	Self-hosted
Platforms	Linux
Support	Community, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	2 integrations: NetBox, Prometheus
Pricing	Open source
Website	purelb.io
Facts checked	20 Sep 2026

PureLB integrations

PureLB lists 2 integrations on its own site.

NetBox
Prometheus

Alternatives to PureLB

See all PureLB alternatives →

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Featured on iTechGuides

PureLB is listed in our Load Balancing Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update