Provides a massive hosted model catalog with instant access, but requires trusting a third-party platform instead of self-hosting.
#1LiteLLM records 576,967 monthly visits with +7.9% month-over-month growth and Freemium, Contact for Pricing pricing. Weights & Biases (CoreWeave Forge) records 315,624 monthly visits with -80.2% growth and Freemium, Contact for Pricing, Free pricing.

Track, evaluate, and ship AI models and agents in one connected environment.
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | litellm.ai | wandb.ai |
| Pricing Model | Freemium, Contact for Pricing | Freemium, Contact for Pricing, Free |
| Monthly Visits | 576.97K (576,967) | 315.62K (315,624) |
| MoM Traffic Delta |
|---|
| +42.48K (+7.9%) |
| -1.28M (-80.2%) |
| Primary Market & Share | 🇺🇸 United States (27.9%) | 🇺🇸 United States (32.2%) |
|---|
| Direct Visits / mo | 228.97K | 230.88K |
|---|
| User Rating | 4.8 | 4.7 |
|---|
| Supported Platforms | Website | Website |
|---|

One open-source AI gateway for 100+ LLM providers
Call 100+ providers and 1,800+ models using one request format, so you can swap models without changing application code.
Issue scoped keys per team, project or app, set monthly spend caps and see exactly who is driving usage and cost.
Distribute traffic across deployments, retry on failure and automatically fall back to another model or provider when one goes down.
Dashboards for request volume, tokens and cost per model, with support for logging and analytics integrations.

Track, evaluate, and ship AI models and agents in one connected environment.
Log metrics, losses, and media from training runs and compare them side by side in interactive charts to spot what actually improves your model.
Run automated hyperparameter sweeps and visualize parameter importance so you can converge on better configurations faster.
Version datasets and model artifacts, track lineage, and promote models through a registry from training to production.
Build, log, and evaluate LLM prompts and applications, with tracing and evaluation tools grouped under an LLMOps workflow.
Provides a massive hosted model catalog with instant access, but requires trusting a third-party platform instead of self-hosting.
#1Free / Open-sourceRun and build with open AI models locally or in the cloud
#2
SpecialistHosts high-performance open-weight models directly on dedicated serverless infrastructure, but does not route across external providers.
#3Delivers automated model failover and budget governance through an API gateway, but with less open-source customization.

Unified LLM gateway with failover and analytics, but offers less robust open-source developer SDK support.

Free / Open-sourceProvides deep production LLM observability and tracing, focusing heavily on debugging production failures and drift.

Offers advanced enterprise observability and guardrail tools, but lacks LiteLLM's lightweight self-hosted proxy simplicity.

Provides managed multi-provider AI routing and cost tracking, but lacks the native open-source flexibility of LiteLLM.
Free / Open-sourceAn open-source alternative for unifying LLM providers, but features a less extensive ecosystem of middleware integrations.

SpecialistFeatures simulation and guardrail tools for testing LLM safety and robustness before production deployment.

Free / Open-sourceOffers robust LLM evaluation and testing suites with integrated enterprise gateways, prioritizing prompt benchmarking.

Free / Open-sourceOpen-source request routing with built-in evaluations, but has a smaller community and fewer pre-built provider connectors.
Provides a massive hosted model catalog with instant access, but requires trusting a third-party platform instead of self-hosting.
Free / Open-sourceRun and build with open AI models locally or in the cloud
SpecialistHosts high-performance open-weight models directly on dedicated serverless infrastructure, but does not route across external providers.
Delivers automated model failover and budget governance through an API gateway, but with less open-source customization.
Unified LLM gateway with failover and analytics, but offers less robust open-source developer SDK support.
Free / Open-sourceProvides deep production LLM observability and tracing, focusing heavily on debugging production failures and drift.
Offers advanced enterprise observability and guardrail tools, but lacks LiteLLM's lightweight self-hosted proxy simplicity.
Free / Open-sourceAn open-source alternative for unifying LLM providers, but features a less extensive ecosystem of middleware integrations.
SpecialistFeatures simulation and guardrail tools for testing LLM safety and robustness before production deployment.
Free / Open-sourceOffers robust LLM evaluation and testing suites with integrated enterprise gateways, prioritizing prompt benchmarking.
Free / Open-sourceOpen-source request routing with built-in evaluations, but has a smaller community and fewer pre-built provider connectors.