VowpalWabbit Vowpal wabbit by VowpalWabbit
Vowpal Wabbit is a machine learning system which pushes the frontier of machine learning with techniques such as online, hashing, allreduce, reductions, learning2search, active, and interactive learning.
About VowpalWabbit Vowpal wabbit
From the project's README at github.com/VowpalWabbit/vowpal_wabbit. Lightly cleaned for readability; for the full source see the upstream repo.
[](https://github.com/VowpalWabbit/vowpalwabbit/actions/workflows/vendorbuild.yml) [](https://github.com/VowpalWabbit/vowpalwabbit/actions/workflows/buildmacos.yml) [](https://github.com/VowpalWabbit/vowpalwabbit/actions/workflows/vcpkgbuild.yml)
This is the Vowpal Wabbit fast online learning code. Why Vowpal Wabbit? Vowpal Wabbit is a machine learning system which pushes the frontier of machine learning with techniques such as online, hashing, allreduce, reductions, learning2search, active, and interactive learning. There is a specific focus on reinforcement learning with several contextual bandit algorithms implemented and the online nature lending to the problem well. Vowpal Wabbit is a destination for implementing and maturing state of the art algorithms with performance in mind. Input Format.** The input format for the learning algorithm is substantially
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 8.7k | github.com/VowpalWabbit/vowpal_wabbit |
| GitHub forks | 1.9k | github.com/VowpalWabbit/vowpal_wabbit |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 16.9 years | since Jul 2009 |
| Last commit | 2 months ago | May 4, 2026 |
| Releases shipped | 32 | last: 4 months ago |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
What people say on Hacker News
Ready to self-host VowpalWabbit Vowpal wabbit?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed Jun 21, 2026.
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