Alternatives / Kapa.ai
Looking for an open source Kapa.ai alternative? We compared 2 open source AI knowledge base platforms by license and features. FastGPT and MaxKB both build RAG assistants on your documents with workflows, and both come from the Chinese open-source ecosystem.
Written by Maxime DERAME
Last updated:
| Alternative | Best for | License |
|---|---|---|
| FastGPT | Knowledge base with visual workflows | FastGPT Open Source License (Apache-2.0 + conditions) |
| MaxKB | RAG and workflows for support | GPL-3.0 |
We looked for open-source tools that answer questions from your documentation like Kapa.ai. We verified each project's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.
FastGPT builds AI knowledge bases with data processing, model calls, and visual workflows, with OpenAI-compatible APIs and several LLMs. It uses its own open-source license with extra conditions, and a Commercial Edition adds support and custom branding.
MaxKB combines RAG, a workflow engine with MCP tool use, and support for private and hosted models for enterprise knowledge and customer service. It is GPL-3.0.
FastGPT's license is Apache-2.0 with conditions, not plain Apache-2.0, and MaxKB's GPL-3.0 carries copyleft obligations.
Both had commits within days of this update.
Kapa.ai is a proprietary service that hosts a support assistant trained on your docs, priced by usage. Open-source platforms let you run the assistant yourself with any model, but you build integrations and evaluation.
FastGPT is a knowledge-base platform built on LLMs, with data processing, RAG retrieval, and visual AI workflow orchestration, plus OpenAI-aligned APIs. It is licensed under the FastGPT Open Source License, which is Apache-2.0 with additional conditions: you may not run a multi-tenant SaaS similar to FastGPT without written authorization, and you may not remove its logo or copyright information. A Commercial Edition adds dedicated support and commercial licensing. It is an AI knowledge-base tool, not a traditional helpdesk.
Pricing: Free to self-host within the license terms; the Commercial Edition is paid.
MaxKB is a GPL-3.0 platform for enterprise knowledge management and customer service that combines RAG, a workflow engine with MCP tool use, and support for many models, private or hosted. It targets zero-code integration with business systems.
Pricing: Free open-source edition; commercial editions exist.
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| FastGPT | AI knowledge base | FastGPT license (Apache-2.0 + conditions) | Yes | Docs assistants |
| MaxKB | AI knowledge base | GPL-3.0 | Yes | Customer service |
Want drag-and-drop workflow design
FastGPT has visual workflows and OpenAI-compatible APIs.
Want MCP tool use and RAG
MaxKB combines a RAG pipeline with a workflow engine and MCP tools.