LibreQoS is an open source Quality of Experience (QoE) platform that helps Internet Service Providers (ISPs) enhance their customers’ internet connections. It leverages state of the art Flow Queueing (FQ) and Active Queue Management (AQM) algorithms to manage latency and bufferbloat over existing infrastructure. It also monitors performance by measuring end-to-end TCP round trip time for each subscriber, Access Point, and Site on a network. LibreQoS ensures fair allocation of bandwidth, prioritizes critical real-time applications, and promotes connection quality, equity and access.

LibreQoS runs on a server acting as a managed bridge between an ISP’s edge router and the core of the network. Servers running LibreQoS can shape traffic for many thousands of customers.

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The Importance of Low-Latency Connectivity


Keep remote workers productive and employed


Keep students engaged and on-track with their peers


Reduce educational and employment inequities


Ensure reliable access to tele-medicine

LibreQoS can improve the reliability of end-users’ voice and video calls transiting the network. With work-from-home, remote learning, and tele-medicine becoming increasingly common – it is important to minimize any disruptions to video calls and VoIP that might otherwise occur due to bufferbloat within the ISP network.

Adoption Worldwide

LibreQoS and Your Network

Happy Customers

Ensure the most latency-sensitive end-users (gamers, remote workers, remote learners) have a great experience


Control congestion at every point in your network fabric - and deliver performance that sets you apart from the competition

Reduce Churn

Alleviate the most common pain points for customers who stream video, play video games, and video conference.

LibreQoS allows operators to mitigate latency under load (bufferbloat) at every possible congestion point in the network fabric – providing a smooth, stable end-user experience that can help ISPs maintain existing customers as well as attract customers. Many of us take it for granted that it is “normal” for an end-user’s video call to stutter or disconnect when someone else on the same home network is watching a 4K video. That is actually a symptom of bufferbloat, and can be mitigated with LibreQoS. LibreQoS ensures the most latency-sensitive end-users (gamers, work-from-home clients, remote learners) have a positive experience, which in turn increases customer retention and reduces ISP costs related to support tickets, calls, and truck-rolls.

Before LibreQoS

After LibreQoS

Success Stories



Equinix supports LibreQoS through its Open Source program – providing access to hardware resources on its Equinix Metal infrastructure. Equinix’ support has been crucial for LibreQoS to scale past 10Gbps for higher-bandwidth networks. Learn more about Equinix Metal here.


LibreQoS has been funded through the NGI0 Entrust Fund, a fund established by NLnet with financial support from the European Commission’s Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101069594.

Get Started With LibreQoS

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Who We Are

Robert Chacón


Dave Täht

Chief Science Officer

Herbert Wolverson

Chief Product Officer