Shortlist by what you need
Start here if you know why you are leaving Stack AI.
Want the closest match?
CassidyMost similar to Stack AI in what it does, its category and its price.
Visit (opens Cassidy in a new tab)Need a free plan?
MindStudioHas a free plan, rated 4.4 out of 5.
Visit (opens MindStudio in a new tab)Want the lowest price?
GumloopFrom $37/mo, the lowest starting price here.
Visit (opens Gumloop in a new tab)Want the best rated?
DifyRated 4.4 out of 5 in our review, against 4.4 for Stack AI.
Visit (opens Dify in a new tab)
At a glance
Green means better than Stack AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Stack AIBaseline | 4.4 | Free | Yes | Internal AI tools for HR, legal, and ops, no engineers required | |
| Cassidy | 4.2−0.2 | Free | Yes | Turns a company's internal knowledge into a Slack-native assistant | vs Stack AI |
 Langflow | 4.2−0.2 | Free | Yes | DataStax-owned, but still free, open, and framework-agnostic | vs Stack AI |
 NextBrain AI | 3.7−0.7 | Not listed | No | AutoML runs experimentation 10x faster, document extraction hits 99% clean fields, and a RAG knowledge repository makes your organization's context searchable 24/7. | vs Stack AI |
| MindStudio | 4.4Same | $20/mo | Yes | Build an AI agent, then publish and monetize it | vs Stack AI |
| Dify | 4.4Same | $59/mo | Yes | A fuller LLMOps platform, not just a flow visualizer | vs Stack AI |
 Jestor | 3.9−0.5 | Not listed | No | No-code platform for building internal business apps, forms, and workflows with AI-assisted automation. | vs Stack AI |
| Gumloop | 4.5+0.1 | $37/mo | No | No-code building blocks with AI reasoning baked into each node | vs Stack AI |
 reciTAL | 3.8−0.6 | Not listed | No | French AI document-processing platform for extraction, RAG and workflow automation, available as SaaS or on-premises. | vs Stack AI |
The alternatives in detail
In order of how closely each one matches Stack AI.
Cassidy
4.2Free
vs Stack AI−0.2
Turns a company's internal knowledge into a Slack-native assistant.
- AI assistants grounded in a company's own internal documents
- Slack-native deployment for in-context answers
- No-code workflow builder for custom business processes
Answers grounded in actual internal company knowledge, not generic information
No free tier to test before committing
Langflow
4.2Free
vs Stack AI−0.2
DataStax-owned, but still free, open, and framework-agnostic.
- 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
Free and open source despite being corporately owned
Corporate ownership raises long-term independence questions for some users
NextBrain AI
3.7Not listed
vs Stack AI−0.7
AutoML runs experimentation 10x faster, document extraction hits 99% clean fields, and a RAG knowledge repository makes your organization's context searchable 24/7.
- AutoML with 10x faster experimentation cycles
- RAG Knowledge Repository - 24/7 searchable organizational context
- Document Extraction with AI validation (99% cleaner fields)
Document-grounded RAG produces answers you can trace back to a real source
No pricing disclosed - requires requesting a demo
MindStudio
4.4$20/mo
vs Stack AISame
Build an AI agent, then publish and monetize it.
- No-code AI agent and workflow builder
- Marketplace for publishing and monetizing finished agents
- Testing and iteration tools before public release
Marketplace option is a genuine point of difference from internal-only builders
Marketplace monetization matters less for purely internal automation needs
Dify
4.4$59/mo
vs Stack AISame
A fuller LLMOps platform, not just a flow visualizer.
- Visual builder for RAG pipelines and agent workflows
- Built-in production observability and usage monitoring
- One-click deployment to API or embeddable chat widget
Covers the full lifecycle from building to deploying to monitoring
Broader scope adds complexity versus simpler single-purpose builders
Jestor
3.9Not listed
vs Stack AI−0.5
No-code platform for building internal business apps, forms, and workflows with AI-assisted automation.
- Visual no-code builder for relational databases, forms, and workflows
- Workflow automation triggers layered on top of custom data tables
- Built-in analytics for tracking activity across internal tools
Y Combinator-backed with real staying power since its 2020 founding
Ongoing pricing is not published; budgeting requires a sales conversation
Gumloop
4.5$37/mo
vs Stack AI+0.1
No-code building blocks with AI reasoning baked into each node.
- AI reasoning nodes alongside traditional automation actions
- Template marketplace for common workflows
- No-code visual workflow builder
AI-native nodes handle judgment calls, not just mechanical steps
Newer platform with a smaller integration library than established competitors
reciTAL
3.8Not listed
vs Stack AI−0.6
French AI document-processing platform for extraction, RAG and workflow automation, available as SaaS or on-premises.
- Studio IA for training and customising document extraction models
- Handles long documents, poor scans, handwriting and tables
- Low-code and no-code production workflows with monitoring
Specialised for hard documents such as handwriting and degraded scans
Quote-only pricing
FAQ
Questions people ask
Is Stack AI free?
Stack AI has a free plan.
What is the best free alternative to Stack AI?
MindStudio is the highest-rated alternative here with a free plan (4.4 out of 5). Other free options: Dify, Cassidy, Langflow.
What is the cheapest alternative to Stack AI?
Among paid plans, MindStudio has the lowest starting price (from $20/mo). If you need it free, start with MindStudio.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.