
Rasa
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Open-source conversational framework that grew CALM: flows you own, LLMs you plug in, and a self-host path for assistants that cannot live only in a vendor canvas. No lifecycle review is recorded for this listing. Its inclusion in the directory does not confirm current availability; check the vendor before relying on it.
Product preview

Overview
Rasa predates ChatGPT as the serious open assistant framework and had to add LLMs without throwing away flows: CALM is the bet that conversation still needs structure you can test. Voiceflow is the canvas; Botpress is the studio; Rasa is the framework engineers check into git.
It will not be a Friday widget. It will be the stack when the assistant is a product with evals. Pro packaging and cloud terms have moved — read them. For regulated chat you might self-host, it remains a shortlist item.
No content sources are recorded for this entry. Its inclusion and existing score do not establish that its claims have been independently verified.
Pros / Cons
Pros
- Flows you can test, plus an LLM
- Self-host path for regulated assistants
- Engineer-owned, git-shaped
- Older than the toy-bot wave
Cons
- Not a CX canvas for Friday
- Pro terms have shifted
- Setup is a framework, not a paste
Who it's for
Self-hosted assistants with testable flows
Hybrid NLU plus LLM conversation
Replacing a vendor canvas under residency rules
Git-owned dialogue as a product
Bottom line
The engineer-owned assistant framework — pick it when Voiceflow is too closed and a widget is too small.
Key Features
Tags
Frequently asked questions
Is Rasa currently available?
No lifecycle review is recorded for this listing. Its inclusion in the directory does not confirm current availability; check the vendor before relying on it.
What is Rasa?
Rasa is a AI Platforms tool developed by Rasa. It was introduced in 2016, and its developer is headquartered in Berlin, Germany. Open-source conversational framework that grew CALM: flows you own, LLMs you plug in, and a self-host path for assistants that cannot live only in a vendor canvas.
Is Rasa free?
Rasa uses a freemium model: a free tier is available, and paid plans unlock more usage and advanced features.
Is Rasa open source?
Yes — Rasa is open source. The source code is publicly available at https://github.com/RasaHQ/rasa.
What are the best alternatives to Rasa?
Notable AI Platforms alternatives include Hugging Face, Replicate, Ollama. Browse all 138 tools in our AI Platforms category for a full overview.
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Basic Info
- Pricing
- Freemium
- Editorial score
- ★ 4.4 / 5 How we score
- Platforms
- Self-hostCloudAPI
- Launched
- 2016
- Headquarters
- Berlin, Germany
- Last verified
- Not recorded