Comparison

SGLang vs vLLM

On the evidence we track, vLLM leads this comparison with a composite score of 64/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
SGLang50
★vLLM64
Score
vioscaleAI score
SGLang50 / 100low · 10%
vLLM64 / 100medium · 58%
Pricing
Free tier
SGLang–
vLLM✓
Model
Price level
SGLangfree
vLLMfree
Transparent
SGLang–
vLLM✓
Integrations
Count
SGLang3
vLLM29
Adoption
Dependent repos
SGLang–
vLLM5
Github stars
SGLang–
vLLM93,797
Package downloads weekly
SGLang–
Activity
Commits last 30d
SGLang–
vLLM100
Release
Cadence days
SGLang–
vLLM12
History
SGLang–
License
Spdx
SGLang–
Language
Primary
SGLang–
vLLMPython
Market
Availability
SGLang–
Content
Faq
SGLang3 items

Capabilities

Feature-by-feature on the axes that matter for model serving. “-” means undocumented, not absent.

Capabilities
Continuous batching
SGLang-
vLLM✓
Dynamic batching
SGLang-
vLLM-
Multi framework support
SGLang✓
vLLM✓
GPU acceleration
SGLang✓
vLLM✓
Multi GPU multi node
SGLang✓
vLLM✓
Quantization support
SGLang-
vLLM✓
Openai compatible API
SGLang✓
vLLM✓
Autoscaling scale to zero
SGLang-
vLLM-
Multi model serving
SGLang-
vLLM✓
Canary ab rollout
SGLang-
vLLM-
Kubernetes native
SGLang-
vLLM✓
Open source
SGLang✓
vLLM✓

What each one is

The product in its own terms, so the numbers below have context.

SGLang

An open-source inference system designed for production deployments of large language and multimodal models, supporting both single-GPU and distributed cluster setups with emphasis on low latency and high throughput.

Independently observed

vLLM

Leader

A production-grade inference engine designed for efficient serving of large language models with support for distributed deployment, GPU acceleration, and multi-model endpoints.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

SGLang

Open source
as of verify ↗

vLLM

Leader
Open sourceFree tier
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Linux
SGLang–
vLLM✓
CLI
SGLang–
vLLM✓
Deployment
Cloud / SaaS
SGLang✗
vLLM✓
Self-hosted
SGLang✓
vLLM✓
On-premise
SGLang✗
vLLM✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (2)
  • Hugging Face
  • OpenAI

SGLang

3 total - 1 not shared
  • Slack
Independently observed

vLLM

Leader
33 total - 31 not shared
  • NVIDIA Dynamo
  • OpenAI-compatible API
  • Anthropic Messages API
  • FlashAttention
  • FlashInfer
  • CUTLASS
  • torch.compile
  • gRPC
  • GPTQ
  • AWQ
  • GGUF
  • ModelOpt
  • TorchAO
  • OpenAI API
  • Kubernetes
  • PyTorch
  • Ray
  • OpenTelemetry
  • Prometheus
  • FastAPI
  • Transformers
  • Outlines
  • Google Cloud TPU
  • Intel Gaudi
  • +7 more
Independently observed
Still deciding?

SGLang or vLLM: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.