Best Vespa Alternatives in 2026

#1 alternative

LanceDB

Open-source embedded vector database for multimodal AI and RAG

#2 alternative

Ollama

Run open LLMs locally with a single command.

#3 alternative

LiteLLM

Open-source AI gateway to call 100+ LLM APIs in one format

#4 alternative

Hugging Face

The open hub for machine learning models, datasets, and demos.

#5 alternative

LangChain / LangSmith

Framework and platform for building LLM apps and agents

#6 alternative

GLM (Z.ai)

Open-weight frontier LLM family from Z.ai (Zhipu AI), tuned for coding and agents.

#7 alternative

Qwen

Alibaba's free AI assistant, backed by the open-weight Qwen model family

#8 alternative

Genmo

Open-source AI video generation with the Mochi model

#9 alternative

Refact.ai

Open-source autonomous AI coding agent that runs end-to-end tasks in your IDE

#10 alternative

Agno

High-performance Python framework for building multi-agent systems and AgentOS

#11 alternative

Lunary

Open-source LLM observability and prompt management for chatbots and RAG

#12 alternative

Label Studio

The most popular open-source data labeling platform for text, image, audio, and more