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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsFor an open-source AI gateway shortlist, start by comparing LiteLLM and Bifrost. Portkey Gateway is a related option from the Portkey project itself—not an independent replacement—and its repository described Gateway 2.0 as a pre-release in documentation checked on October 7, 2026. There is no evidence-based universal “top three” ranking here; the right fit depends on provider compatibility, routing needs, licensing, and the work your team can support.
At a glance: the open-source gateway options
| Project | What its documentation describes | What to verify |
|---|---|---|
| LiteLLM | An AI gateway and SDK supporting 100+ APIs, with cost tracking, guardrails, load balancing, and logging listed by the project. | Which capabilities are available under the license and edition you intend to use, and whether its supported APIs match your application. |
| Bifrost | A unified API for 20+ providers, with routing and failover. The project reports 11 microseconds of request overhead at 5,000 requests per second. | Provider and endpoint compatibility, edition boundaries, and performance under your own workload. Its latency figure is a vendor-reported benchmark, not an independent comparison. |
| Portkey Gateway | The Portkey project’s own gateway. Its repository described Gateway 2.0 as a pre-release with core enterprise gateway capabilities merging into open source. | Current release status and the project’s current edition boundaries. Consider it an adjacent deployment or edition option, not an independent alternative. |
LiteLLM: broad API coverage and gateway features
LiteLLM’s official repository presents it as both an AI gateway and an SDK, and says it supports more than 100 APIs. It lists cost tracking, guardrails, load balancing, and logging among its capabilities. Those are project descriptions, not independent evidence of production performance or a guarantee that every feature is included in the open-source offering. LiteLLM’s official repository distinguishes commercial-license features and advertises enterprise support.
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It is a candidate to investigate if you need a broadly compatible gateway and want to evaluate features such as cost tracking or load balancing. Before adopting it, check the current repository and license terms against the exact capabilities and support model your team needs.
Bifrost: unified access, routing, and failover
Bifrost’s overview describes a unified API for more than 20 providers, including OpenAI, Anthropic, AWS Bedrock, Google Vertex, and Azure. It also describes automatic failover, load balancing, and a built-in web UI. These are claims made in Bifrost’s own documentation, so confirm that the providers, endpoints, and behaviors you rely on are supported in the version you plan to deploy. Bifrost’s project overview
#1 Best Overall
Bifrost documentation reports 11 microseconds of overhead per request at 5,000 requests per second. That is a vendor-reported benchmark from 2026; no independent, apples-to-apples comparison establishes how it performs against another gateway or on your infrastructure. Measure your own request patterns and failure cases before treating the figure as relevant to your deployment.
Routing and deployment details
Bifrost’s routing documentation describes governance-based routing and adaptive load balancing, and labels adaptive load balancing as an Enterprise feature. Its setup documentation offers NPX and Docker installation routes and describes an API using the OpenAI request/response format. Check the current version and edition matrix, then test the API behavior your application uses, including streaming if applicable. Bifrost routing documentation · Bifrost setup documentation
Bifrost may merit a closer look if a unified gateway, provider routing, and failover are central requirements, or if a Go-based deployment suits your team’s operations. The documented benchmark alone is not a reason to expect better production performance.
Portkey Gateway: a related project, not an independent alternative
Portkey Gateway is the Portkey project’s own gateway, so it does not belong in a list of independent competitors. The project’s repository described Gateway 2.0 as a pre-release in which core enterprise gateway capabilities were merging into open source. The repository also makes scale and latency claims, but those should not be treated as independently verified measurements. Check the repository for current release status and licensing before deciding whether a deployment or edition change makes sense. Portkey Gateway’s official repository
Quick Recap
Best Value
How to choose a gateway for your workload
- Confirm deployment and control requirements. Decide whether you need to self-host and whether your team can operate upgrades, secrets, availability, and observability. Bifrost documents NPX and Docker setup routes; confirm the supported deployment configurations for each candidate in its current documentation.
- Match provider and API behavior. List the providers, model endpoints, API shapes, and streaming behavior your application actually uses. LiteLLM’s 100+ API count and Bifrost’s 20+ provider count are project-reported figures, not results from a standardized coverage test. Verify each required integration directly.
- Specify the routing and recovery behavior. Determine whether you need explicit routing, weighted distribution, load balancing, retries, or fallback, then test those cases. Bifrost documents governance routing and adaptive load balancing, with the latter marked Enterprise; LiteLLM lists load balancing among its gateway features.
- Check licenses and editions feature by feature. Identify the exact controls and support you need, then establish whether they are available under the applicable project license or require a commercial edition. LiteLLM identifies features under a commercial license, and Bifrost marks adaptive load balancing as Enterprise. Terms and feature boundaries can change.
- Test with your traffic and failure modes. Compare candidate gateways using your own request mix, provider behavior, and recovery scenarios. The available vendor latency claim is not an independent comparison, and no gateway was independently tested for this article.
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