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Free AI tools for Create custom GPTs for specialized workflows

Every tool listed here offers a free tier or freemium plan. No credit card required. · 557 reads

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Free options

ChatGPT

Best overallChecked 2h agoLink OKFree plan available
Why it wins

GPT Builder lets you define instructions, upload knowledge files, and add web/code/image tools—publish a custom GPT for your team or publicly in minutes.

When not to use

Requires ChatGPT Plus or Team plan; custom GPTs run only within the OpenAI ecosystem.

Relevance AI

Best for teamsChecked 2h agoLink OKFree plan available
Why it wins

Build custom AI agents with tool access (email, web, APIs, spreadsheets) that non-technical teammates can trigger via a chat interface—no code required.

When not to use

Usage-based pricing; more powerful but more complex to set up than a simple custom GPT.

Flowise AI

Best privacy-firstChecked 2h agoLink OKFree plan available
Why it wins

Open-source platform to build custom chatbot agents with RAG, memory, and API tools—fully self-hosted so proprietary data never leaves your server.

When not to use

Requires technical setup and server maintenance; not plug-and-play for non-technical teams.

Comparison

ToolPricingVerifiedLink
ChatGPTFree plan availableChecked 2h agoTry →
Relevance AIFree plan availableChecked 2h agoTry →
Flowise AIFree plan availableChecked 2h agoTry →

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