The Best AI SDK Alternatives in 2026

Microtica deploys and monitors cloud-native applications, with agents for infrastructure and incident resolution.

Observability and prompt management platform for LLM-based apps. Take your LLMs to the next level.

The abso TypeScript SDK calls more than 100 LLM providers through an OpenAI compatible format.

Mirai Labs builds uzu, a Rust LLM engine for Apple devices, with compact Qwen, LFM, and Muse-Glimmer models.

Upstage builds large language models and document-processing engines for workplace workflows.

MLflow helps teams build AI products by debugging, evaluating, monitoring, and improving AI applications.

The RunAnywhere SDK repository describes a production toolkit for running AI locally.

Comet's Opik platform provides AI observability, agent testing, evaluation, and monitoring for developers.

Guardrails AI provides a framework for building, governing, and deploying reliability controls for generative AI systems.

TensorZero builds open-source tools for production-grade LLM applications: LLM gateway, observability, optimization, evaluations, and experimentation.

Langfuse provides open-source evaluation and observability tools for tracing and improving AI agents.

Deepchecks evaluates and monitors AI agents using testing, tracing, dataset scoring, and production observability tools.

Confident AI provides evaluation, observability, red-teaming, and governance tools for testing and monitoring AI systems.

Featherless is a serverless AI inference platform for open-weight models with API access to tens of thousands of models.

LLM Gateway routes, manages, and analyzes requests across more than 40 language-model providers through one API.

LiteLLM provides a way to call more than 100 language models through an OpenAI-compatible interface.

Valohai provides MLOps tools for comparing, evaluating, and shipping configurations for AI products using specialized models.

Quickly understand inscrutable LLM frameworks by intercepting API calls.

Kimi K2 handles complex language tasks, reasoning, and problem-solving through an AI model developed by Moonshot AI.

Monkt converts PDFs, Word, PowerPoint, Excel, CSV, webpages, and HTML into Markdown or structured JSON.

PromptLayer supports prompt versioning, LLM evaluations, and production monitoring with traces, logs, and regression sets.

Respan unifies LLM observability, evals, prompt optimization, and an AI gateway so teams can ship reliable AI applications.

Flaq offers one API for accessing AI image, video, 3D, music, and language models.

Bifrost by Maxim AI is an open-source AI gateway for LLMs, MCP and agents with routing, governance, guardrails and observability, supporting 8+ providers and 1000+ models via a drop-in SDK replacement.