Open source focus

Open Source Alternatives to CustomGPT

21 open source AI Chatbot options similar to CustomGPT, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Langchain-Chatchat10
Open Source
Open-source, offline-deployable RAG and Agent application built on LangChain for local knowledge base Q&A.
Open source · Self-hostable
Firmgate7
Enterprise Software
Australian-owned, sovereign-built, open-source self-hosted intranet with AI-enabled enterprise modules.
Open source
Feast AI54
MLOpsSan Francisco, United States
An open-source feature store for managing and serving data for AI/ML models in production.
Open source · Self-hostable
LiteLLM53
Foundation ModelSan Francisco, United States
An open-source Python library providing a unified interface for interacting with various LLM providers.
Open source · Self-hostable
PromptQL45
Artificial IntelligenceSan Francisco, United States
An AI-native workspace designed to turn team interactions into actionable, proprietary data for agentic workflows.
Open source · Self-hostable
Littlebat9
Open Source
Open-source AI tools for iOS and AWS, allowing self-hosting and data privacy.
Open source
Mem056
Agentic AISan Francisco, United States$24.0M
Persistent memory layer for AI agents and applications.
Open source · Self-hostable
RelAI51
Agentic AISan Francisco, United States$10.0M
An open-source platform for building, simulating, evaluating, and optimizing reliable AI agents.
Open source · Self-hostable
Rasa49
Conversational AIBerlin, Germany$13.0M
Open-source conversational AI platform for building custom chatbots and virtual assistants.
Open source · Self-hostable
GitHits45
Developer ToolsHelsinki, Finland$1.5M
The Google of code search for open-source.
Open source · Self-hostable
Keep45
EnterpriseSan Francisco, United States$2.5M
Open-source alert management platform using AI to reduce noise and improve alert actionability for engineers.
Open source · Self-hostable
LlamaIndex Inc.39
Foundation ModelSan Francisco, United States
Company
Open source · Self-hostable
GPT4All26
Foundation ModelNew York, United States
Open-source, privacy-focused AI assistant that runs locally on your hardware.
Open source · Self-hostable
Inconvo25
Agentic AIUnknown, Unknown
Inconvo is an open-source platform for building data agents on production data with safe queries, permissions, and structured outputs.
Open source · Self-hostable
DocsGPT8
Open Source
Open-source AI platform for securely deploying intelligent agents, private enterprise search, and complex document workflows on an organization's own data.
Open source · Self-hostable
Llmkb7
Knowledge Management
Self-hosted knowledge-graph wiki platform for teams.
Open source
Arxivexplore6
Foundation Model
A free, open-source Wolfram Language paclet for word statistics, TeX and citations dissection, neural networks, and LLM automated reports over arXiv articles.
Open source
Qdrant71
Vector DatabaseBerlin, Germany$96.5M
High-performance, open-source vector search engine built in Rust for production-grade AI and machine learning workloads.
Open source · Self-hostable
Airweave61
Agentic AISan Francisco, United States$6.0M
Open-source tool to transform application data into accessible knowledge for AI agents.
Open source · Self-hostable
Spice AI40
Databaseתל אביב - יפו, Israel
Ground AI in enterprise data with zero ETL. Spice is an open-source SQL query & hybrid search engine built for data-intensive apps & AI agents.
Open source · Self-hostable
Langflow32
Agentic AILisbon, Portugal
Low-code platform for building, iterating, and deploying AI applications, especially RAG and multi-agent systems.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
Langchain-ChatchatOpen-source, offline-deployable RAG and Agent application built on LangChain for local knowledge base Q&A.	Open Source	Open source · Self-hostable	—	—	10
FirmgateAustralian-owned, sovereign-built, open-source self-hosted intranet with AI-enabled enterprise modules.	Enterprise Software	Open source	—	—	7
Feast AIAn open-source feature store for managing and serving data for AI/ML models in production.	MLOps	Open source · Self-hostable	San Francisco, United States	—	54
LiteLLMAn open-source Python library providing a unified interface for interacting with various LLM providers.	Foundation Model	Open source · Self-hostable	San Francisco, United States	—	53
PromptQLAn AI-native workspace designed to turn team interactions into actionable, proprietary data for agentic workflows.	Artificial Intelligence	Open source · Self-hostable	San Francisco, United States	—	45
LittlebatOpen-source AI tools for iOS and AWS, allowing self-hosting and data privacy.	Open Source	Open source	—	—	9
Mem0Persistent memory layer for AI agents and applications.	Agentic AI	Open source · Self-hostable	San Francisco, United States	$24.0M	56
RelAIAn open-source platform for building, simulating, evaluating, and optimizing reliable AI agents.	Agentic AI	Open source · Self-hostable	San Francisco, United States	$10.0M	51
RasaOpen-source conversational AI platform for building custom chatbots and virtual assistants.	Conversational AI	Open source · Self-hostable	Berlin, Germany	$13.0M	49
GitHitsThe Google of code search for open-source.	Developer Tools	Open source · Self-hostable	Helsinki, Finland	$1.5M	45
KeepOpen-source alert management platform using AI to reduce noise and improve alert actionability for engineers.	Enterprise	Open source · Self-hostable	San Francisco, United States	$2.5M	45
LlamaIndex Inc.Company	Foundation Model	Open source · Self-hostable	San Francisco, United States	—	39
GPT4AllOpen-source, privacy-focused AI assistant that runs locally on your hardware.	Foundation Model	Open source · Self-hostable	New York, United States	—	26
InconvoInconvo is an open-source platform for building data agents on production data with safe queries, permissions, and structured outputs.	Agentic AI	Open source · Self-hostable	Unknown, Unknown	—	25
DocsGPTOpen-source AI platform for securely deploying intelligent agents, private enterprise search, and complex document workflows on an organization's own data.	Open Source	Open source · Self-hostable	—	—	8
LlmkbSelf-hosted knowledge-graph wiki platform for teams.	Knowledge Management	Open source	—	—	7
ArxivexploreA free, open-source Wolfram Language paclet for word statistics, TeX and citations dissection, neural networks, and LLM automated reports over arXiv articles.	Foundation Model	Open source	—	—	6
QdrantHigh-performance, open-source vector search engine built in Rust for production-grade AI and machine learning workloads.	Vector Database	Open source · Self-hostable	Berlin, Germany	$96.5M	71
AirweaveOpen-source tool to transform application data into accessible knowledge for AI agents.	Agentic AI	Open source · Self-hostable	San Francisco, United States	$6.0M	61
Spice AIGround AI in enterprise data with zero ETL. Spice is an open-source SQL query & hybrid search engine built for data-intensive apps & AI agents.	Database	Open source · Self-hostable	תל אביב - יפו, Israel	—	40
LangflowLow-code platform for building, iterating, and deploying AI applications, especially RAG and multi-agent systems.	Agentic AI	Open source · Self-hostable	Lisbon, Portugal	—	32