Rasa if you want the published OSS NLU path. Botpress Cloud is hosted SaaS — /compare/botpress-vs-rasa. Do not install botpress/v12 as a new path (last push 10 Apr 2025).

Typebot is a visual chat form (FSL, already on /best/forms-surveys). This page is NLU and dialogue.

A chat window over models stays on /replace/chatgpt (Open WebUI). This page is a bot you train.

Rasa Open Source is Apache-2.0. You pay hosting and training time. Botpress Cloud is hosted SaaS. Template users never pay c17.

Stacks / AI chat

Medium

Rasa

A bot you host. Rasa is Apache-2.0 — Voiceflow without the hosted conversation seat.

The problem

Voiceflow is a hosted conversation-design desk. You wanted NLU and dialogue on a box you run. Rasa is Apache-2.0 (RasaHQ/rasa; last push 24 Jul 2026 — the 3.6.x line is quieter). Typebot is already in the catalog if the job is a visual chat form — FSL-1.1-Apache-2.0, not OSI. Botpress Cloud is hosted SaaS: the public botpress/botpress tree is an MIT Cloud SDK, not the product; botpress/v12 is the last AGPL on-prem (last push 10 Apr 2025) and is not the published path. This is not Voiceflow's every prototype, channel, or knowledge-base SKU. A survey stays on /replace/typeform (Formbricks). A chat UI over your models stays on /replace/chatgpt (Open WebUI).

Replaces

Voiceflow

Replace Voiceflow See all best open-source chatbot builders

Estimated SaaS saved

$1,200

per year, small team, before lock-in

Start on Railway

Open WebUI if this is a chat window over models, not an NLU bot

Sponsor this stack Tip jar

Placeholder: Rasa (Open Source) plus a model store. Bind HTTP to 0.0.0.0:$PORT. No one-click template in this repo yet — Start on Railway. A visual form stays on /stacks/formbricks-forms. A chat UI stays on /stacks/open-webui-litellm.

The stack

Rasa
Apache-2.0 NLU and dialogue — the published Voiceflow path
Catalog entry →

Cost table

You stop paying	Typical / year	Self-host instead
Voiceflow / hosted conversation design (small team)	$1,200	Rasa + a model store

Agent setup prompt

Replace Voiceflow with Rasa (https://rasa.com/docs/rasa/).

- Official Rasa Open Source docs. Persist models. Train one intent and one story. Do not claim Voiceflow prototypes, channels, or knowledge-base SKUs.
- Typebot if the job is a visual chat form (FSL, not OSI). Botpress Cloud is hosted; v12 is last AGPL (April 2025) — not the path. /compare/botpress-vs-rasa.
- Write AGENT_PROMPT.md.

Also as markdown: /stacks/rasa-bots.md

FAQ

Rasa or Botpress?: Rasa if you want the published OSS NLU path. Botpress Cloud is hosted SaaS — /compare/botpress-vs-rasa. Do not install botpress/v12 as a new path (last push 10 Apr 2025).
Is this Typebot?: Typebot is a visual chat form (FSL, already on /best/forms-surveys). This page is NLU and dialogue.
Is this ChatGPT?: A chat window over models stays on /replace/chatgpt (Open WebUI). This page is a bot you train.
Are these free?: Rasa Open Source is Apache-2.0. You pay hosting and training time. Botpress Cloud is hosted SaaS. Template users never pay c17.