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

Side by side

Compared on	Langflow	Stack AI
Our rating	4.2	4.4Better
Starts at	Free	Free
Free plan	Yes	Yes
Category	Automation	Automation
Plans	Free	Free
Key features	Open-source visual builder for LangChain-based RAG and agent apps Acquired by DataStax in 2024, remains free and open Integration with DataStax Astra DB available optionally Framework-agnostic despite corporate backing Free, unlimited self-hosting	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	Free and open source despite being corporately owned Backed by DataStax's infrastructure and engineering investment Remains framework-agnostic rather than locked to one database	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	Corporate ownership raises long-term independence questions for some users Optional database integration nudges toward DataStax's own products Overlaps closely with Flowise's similar LangChain-visualization approach	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	Langflow, 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 Langflow better than Stack AI?

In our reviews Langflow scores 4.2 and Stack AI scores 4.4. The better pick depends on the job. Langflow: DataStax-owned, but still free, open, and framework-agnostic. Stack AI: Internal AI tools for HR, legal, and ops, no engineers required.

Which is cheaper, Langflow or Stack AI?

Langflow: free. Stack AI: free.

Do Langflow and Stack AI have free plans?

Yes, both have a free plan.

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