Dify vs Stack AI (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Stack AI does not list a price
Free plan
Tie
Both have one
Higher rating
Tie
4.4 against 4.4
Same job?
Yes
Both are Automation tools

Side by side

Compared on	Dify	Stack AI
Our rating	4.4	4.4
Starts at	$59/mo	Free
Free plan	Yes	Yes
Category	Automation	Automation
Plans	From $59/mo	Free
Key features	Visual builder for RAG pipelines and agent workflows Built-in production observability and usage monitoring One-click deployment to API or embeddable chat widget Full self-hosting support Open-source with a managed cloud option	No-code builder for internal AI tools and assistants Retrieval-augmented generation over a team's own documents Built for HR, legal, and operations use cases specifically Visual workflow building without engineering resources Free tier for building and testing
Pros	Covers the full lifecycle from building to deploying to monitoring Self-hosting available for data control requirements Open-source foundation with active development	Removes the engineering bottleneck for internal AI tool requests RAG grounding keeps answers tied to a company's actual documents Accessible to business teams without technical training
Cons	Broader scope adds complexity versus simpler single-purpose builders Managed cloud pricing sits above some lighter competitors Best value requires actually shipping to production, not just prototyping	Best suited to internal tools, less to customer-facing products Quality depends heavily on how well-organized source documents are Newer platform with a shorter track record than established competitors
Company	LangGenius, founded 2023	StackAI, founded 2022

Prices come from each vendor's pricing page, last checked 20260703. Check the vendor before you buy.

FAQ

Questions people ask

Is Dify better than Stack AI?

In our reviews Dify scores 4.4 and Stack AI scores 4.4. The better pick depends on the job. Dify: A fuller LLMOps platform, not just a flow visualizer. Stack AI: Internal AI tools for HR, legal, and ops, no engineers required.

Which is cheaper, Dify or Stack AI?

Dify: from $59/mo. Stack AI: free.

Do Dify and Stack AI have free plans?

Yes, both have a free plan.

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