Rasa Technologies
Boston, US · Founded 2019 · Delaware corporation · 8 known investors
Rasa builds an open-source, LLM-based conversational AI platform enterprises use to create chat and voice assistants.
Also known as Rasa · Rasa Technologies, Inc.
Founders & leadership
Rasa Technologies was founded in 2019 by Alexander Weidauer and Alan Nichol.

Board

Investors · 8
Also in the syndicate · 1
Reported raises · per SEC filings
Form D private placements$70.2M disclosed across 3 of 5 rounds · 2019–2024
▶$30MraisedFeb 2024 · 13 investors · Other TechnologyRule 506(b)
- Melissa GordonExecutive Officer, Director
- Alexander WeidauerPromoter
- Martin CasadoDirector
- Andrei BrasoveanuDirector
- Mathew SearleExecutive Officer
- Alan NicholExecutive Officer, Director, Promoter
- Offering amount
- $30M
- Amount sold
- $30M
- First sale
- Dec 2023
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$25.9MraisedJun 2020 · 8 investors · Other TechnologyRule 506(b)
- Andrei BrasoveanuDirector
- Martin CasadoDirector
- Alan NicholExecutive Officer, Director, Promoter
- Alexander WeidauerExecutive Officer, Director, Promoter
- Offering amount
- $25.9M
- Amount sold
- $25.9M
- First sale
- Jun 2020
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$14.3MraisedMay 2019 · 29 investors · Other TechnologyRule 506(b)
- Alexander WeidauerExecutive Officer, Director
- Andrei BrasoveanuDirector
- Alan NicholDirector
- Offering amount
- $14.3M
- Amount sold
- $14.3M
- First sale
- Mar 2019
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Company profile
researched Aug 2026Rasa Technologies, Inc. develops a conversational artificial intelligence platform that enterprises and developers use to build chatbots, voice applications and other AI assistants. Its foundation is an open-source framework handling natural language understanding and dialogue management, in which the dialogue engine and NLU are machine-learning based, so assistants learn conversation patterns from training data rather than relying on hard-coded rules. Earlier product tiers comprised Rasa Open Source for conversational AI design, Rasa X for sharing and improving an assistant, and Rasa Enterprise, a subscription aimed at large companies shipping and scaling assistants.
The current product line centers on Rasa Pro, a conversational AI framework for enterprises that applies generative AI models to build customized assistants intended to follow business logic predictably, and Rasa Studio, a low-code drag-and-drop interface for designing, building, testing, reviewing and improving LLM-based assistants. Rasa Studio is built on Rasa Pro and uses a technology the company calls Conversational AI with Language Models. The company positions its architecture as LLM-native rather than adding LLMs alongside an existing platform, and says grounding models in customer data reduces the risk of hallucinated replies. Deployment on-premises or in private cloud is offered for regulated industries such as financial services and healthcare, so messages between user and assistant remain within customer infrastructure.
Founding story
Co-founders Alex Weidauer and Alan Nichol began the project while attempting to build their own AI assistant and finding existing developer tooling inadequate; Weidauer has described the work as starting in his kitchen in Berlin. They built their own tools, open-sourced them, and the work grew into the company. Nichol, who holds a PhD in machine learning, leads the research team.
Business model
Rasa distributes a core open-source framework and monetizes through commercial enterprise offerings layered on top of it, historically Rasa Enterprise (a subscription for large companies to ship and scale assistants) and more recently Rasa Pro and Rasa Studio.
Subscription-based commercial products for enterprises built on top of the freely available open-source framework.
Traction
Development tools reported as downloaded more than 50 million times by developers as of February 2024, up from more than three million reported around the Series B. Customers cited include two of the world's top three banks, major insurance providers, global travel and hospitality companies, PayPal, Deutsche Telekom, Adobe, HCA Healthcare and Travelers. PayPal has integrated Rasa's technology into its customer service portal.
Latest developments
In February 2024 the company closed a $30 million Series C co-led by StepStone Group and PayPal Ventures with follow-on participation from Andreessen Horowitz, Accel and Basis Set Ventures, bringing total funding above $70 million. Proceeds were earmarked for advancing the technology, strengthening market presence and expanding the team across North America and Europe.
▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies
Market position
Named by CIO Applications Magazine as a recipient of its Top 10 Chatbot Solution Companies recognition for 2020. Investor PayPal Ventures described Rasa as the best platform for enterprises to develop robust conversational AI when making what it called its first AI investment.
The company positions itself as pairing the flexibility and nuanced understanding of large language models with the control and predictability of traditional NLP-based chatbots, so business process decisions remain governed by enterprise-defined logic rather than left to the model. Open-source availability, customizability of the full code base, transparency and explainability, and on-premises or private-cloud deployment for regulated sectors are cited as further points of distinction versus SaaS-only platforms.
Technology
The platform combines natural language understanding and machine-learning-driven dialogue management with, in more recent products, large language models. Models can be trained for specialized domains and multiple spoken languages. The company invests in in-house research whose results are published in peer-reviewed venues and fed into the product. Because the code is open, model behavior can be inspected, which the company frames as an advantage over black-box alternatives. Deployment options include on-premises and private cloud.
Go-to-market
Adoption begins with the free open-source framework and developer community, supported by documentation and education, with commercial enterprise subscriptions sold to organizations scaling assistants across lines of business; a low-code studio broadens reach to less technical users. Enterprises commonly start with narrow use cases such as FAQ or IT help-desk assistants before expanding to additional assistants and languages.
Developers ranging from individuals to product teams at Fortune 500 companies, and enterprises in regulated and customer-service-intensive sectors including banking, insurance, healthcare, travel and hospitality, payments and telecommunications.
Geography
Reported as remote-first with presence in San Francisco, Berlin, London, Paris and Belgrade; earlier coverage listed San Francisco headquarters with an additional Berlin office.
History
The company originated from an open-source conversational AI project by Weidauer and Nichol and grew a developer community around it. It raised a $26 million Series B led by Andreessen Horowitz, at which point it reported roughly three million downloads and offices in San Francisco and Berlin. In 2020 it was named by CIO Applications Magazine among its Top 10 Chatbot Solution Companies. By February 2024 it had closed a $30 million Series C co-led by StepStone Group and PayPal Ventures, bringing total capital raised to more than $70 million, with Melissa Gordon serving as chief executive and Alan Nichol as chief technology officer.
Risks & controversies
The company cites the risk of AI hallucinations — chatbots generating false or misleading replies — as a problem it addresses by enhancing models with customer data, and notes that large language models are difficult to control, leading many platforms to restrict them to low-stakes topics.
Compiled by commissioned research from 4 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 4
launches, deals, and filingsRasa Technologies announced a $30 million Series C round, bringing total capital raised to more than $70 million. Funds are earmarked for technology development, market presence and team expansion across North America and Europe. PayPal Ventures described it as its first AI investment.
$30M source ↗
PayPal Ventures partner Alan Du said PayPal has integrated Rasa's technology into its customer service portal and seen improved customer engagement.
CIO Applications Magazine recognized Rasa Technologies as a recipient of its Top 10 Chatbot Solution Companies award for 2020.
Rasa Technologies announced a $26 million Series B financing round led by Andreessen Horowitz, to be used for product growth, AI research and development, and expansion of product development and research teams.
$26M source ↗
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
Legal entities · 1
corporate structureIn the news
Investing in Rasaa16z.com · Jun 2020
Rasa raises $26M led by A16Z for its open source conversational AI platformtechcrunch.com · Jun 2020▸Research sources · 4
primary sources listed
- Conversational AI startup Rasa Technologies raises $30M to combine LLMs with traditional chatbots - SiliconANGLEsiliconangle.com · web
4 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Rasa Technologies do?
- Rasa builds an open-source, LLM-based conversational AI platform enterprises use to create chat and voice assistants.
- Who founded Rasa Technologies?
- Rasa Technologies was founded by Alexander Weidauer, Alan Nichol in 2019.
- Who are Rasa Technologies's investors?
- Rasa Technologies's investors include 468 Capital, Accel, Andreessen Horowitz, Basis Set Ventures, Mango Capital, PayPal Ventures, Stepstone Group.
- How much funding has Rasa Technologies raised?
- Rasa Technologies has disclosed $70.2M raised across 3 of its 5 known rounds.
- Where is Rasa Technologies headquartered?
- Rasa Technologies is headquartered in Boston, US.



