# Rasa

> Rasa is the open-source-rooted conversational AI platform enterprises use to build, deploy and govern generative AI assistants. Its CALM approach (Conversational AI with Language Models) pairs LLM flexibility with the determinism regulated industries demand - powering assistants for some of the world's largest banks, telecoms and travel brands.

- **Founded:** 2016
- **Headquarters:** San Francisco, California, United States (with Berlin, Germany office)
- **Founders:** Alan Nichol (Co-founder & CTO), Alexander Weidauer (Co-founder), Tom Bocklisch (Co-founder)
- **Team size:** ~150
- **Products:** Rasa Open Source, Rasa Pro, Rasa Studio, CALM
- **Notable:** 50M+ open-source downloads, Raised over $70M across four rounds, Doubled ARR in 2023

## Products & services

- **Rasa Open Source** — The Apache-licensed Python framework for building text and voice assistants - NLU, dialogue management, integrations. 50M+ downloads.
- **Rasa Pro** — Commercial, enterprise-grade runtime with CALM, observability, security and support for production deployments.
- **Rasa Studio** — Low-code UI for designing, training and managing assistants - bridges developers and conversation designers.
- **CALM** — Conversational AI with Language Models: Rasa's architecture pairing LLM reasoning with rule-bound, validated responses to guarantee zero hallucination.

## Achievements

- 50M+ open-source downloads
- Raised over $70M across four rounds
- Doubled ARR in 2023
- Deployed at two of the world's three largest banks
- Apache 2.0 framework with 20k+ GitHub stars

## Latest updates

- **2024-02** — Closed $30M Series C co-led by StepStone Group and PayPal Ventures.
- **2024** — Launched CALM (Conversational AI with Language Models) and Rasa Studio.
- **2023** — Melissa Gordon (ex-Oracle) joined as CEO; ARR roughly doubled.

## Links

- Website: https://rasa.com
- LinkedIn: https://www.linkedin.com/company/rasa
- Twitter/X: https://twitter.com/Rasa_HQ
- GitHub: https://github.com/RasaHQ
- YouTube: https://www.youtube.com/c/RasaHQ
- Facebook: https://facebook.com/RasaHQ/

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Profile page: https://yespress.io/rasa
Published by YesPress — https://yespress.io
Last updated: 2026-05-23