Rebel Fund

Founded in 2019 and headquartered in San Francisco, Rebel Fund is a seed-stage venture capital firm that invests primarily in the United States. It focuses on education, training services, information technology, and healthcare sectors.

John Adler III

Partner

Jared Heyman

Managing Partner

Jonathan Hirsch

Partner

Daniel Kan

Partner

Richard F. Purcell

Investor

Richard Sussman

Founding Strategic Partner

Past deals in Language Processing

Confident AI

Seed Round in 2025
Confident AI is a developer of an evaluation platform focused on improving Large Language Model (LLM) applications within the field of artificial intelligence. The company's platform provides advanced metrics and real-time feedback, allowing AI developers and organizations in technology and research to effectively monitor and enhance the performance of their systems. Additionally, Confident AI offers customizable dataset generation, which aids in optimizing LLM applications for accuracy and alignment with specific goals. Through its innovative tools, the company plays a crucial role in enhancing the efficacy of AI development.

Relvy

Seed Round in 2024
Relvy AI is a software development company specializing in AI-driven issue detection and resolution. It develops AI agents that automatically identify and debug software problems before they escalate, enhancing development teams' efficiency and workflows. Notably, Relvy's platform employs small language models and does not rely on user data for training, ensuring privacy and data security.

Circlemind

Seed Round in 2024
Circlemind is a technology company that specializes in advanced retrieval methods for knowledge graphs. It deploys open-source, agentic graph retrieval techniques, which are self-improving, multi-hop, and capable of handling dynamic data. These methods significantly enhance the capabilities of retrieval pipelines, outperforming traditional RAG systems. The company's expertise lies in vector databases and knowledge graphs, empowering users to build sophisticated retrieval pipelines using plain English.

Voicepanel

Seed Round in 2024
Voicepanel is a developer of an artificial intelligence-powered platform that facilitates the collection of detailed customer feedback through voice conversations. The platform streamlines qualitative research by utilizing AI to moderate interactions, allowing businesses to gain deeper insights into customer thoughts and emotions. By providing a straightforward method for gathering feedback, Voicepanel enables organizations to better understand their products and services from the perspective of their customers, enhancing their ability to respond to consumer needs effectively.

Syncly

Seed Round in 2023
Syncly is a company that specializes in automating the categorization and analysis of customer feedback through artificial intelligence. Its platform enhances productivity by streamlining the issue-reporting process, allowing businesses to report bugs and usability feedback directly from their screens. This automation facilitates a more efficient quality assurance process, enabling clients to reduce the time spent on reporting issues. As a result, Syncly's solutions empower businesses to prioritize feedback based on its potential revenue impact, ultimately freeing up resources to focus on revenue-generating activities.

Typewise

Seed Round in 2022
Typewise AG is a Swiss deep tech company established in 2019 and headquartered in Binningen, Switzerland. It specializes in developing innovative text prediction technology and offers a range of products aimed at enhancing communication efficiency. The flagship product, the Typewise Keyboard, is an award-winning app available for iOS and Android that supports over 30 languages and includes features like a custom dictionary and predictive text capabilities, specifically catering to users in multilingual contexts, including support for Hinglish. Additionally, Typewise provides an AI Writing Assistant, a browser-based tool designed to improve the speed and quality of written communication, particularly for customer service and sales teams. The company also offers a Text Prediction API that allows developers to integrate its advanced text prediction capabilities into their own applications, thereby enhancing user experience and productivity. With nearly 2 million installations of its keyboard app, Typewise aims to make everyday communication easier and more efficient.

Vanan Online Services

Seed Round in 2022
Vanan Online Services is a global provider of language support services, catering to both individual and business clients. The company specializes in a wide range of services, including audio and video transcription, certified translation, closed captioning, subtitling, document typing, and legal typing. Additionally, Vanan offers audio voiceover, video animation, and video editing services.

Outloud.ai

Seed Round in 2021
Outloud.ai is a developer of voice automation software that specializes in enhancing customer interactions in the hospitality sector, particularly in drive-thru restaurants. The company's technology leverages artificial intelligence to replicate human voices, manage informal language, and comprehend various conversational contexts. Outloud.ai's solutions are designed to operate effectively in noisy environments, allowing businesses to automate voice conversations with their customers. This innovation aims to streamline communication processes and improve operational efficiency within the industry.

Writesonic

Seed Round in 2021
Writesonic is a prominent generative AI platform that specializes in content creation, boasting over 5 million registered users, including more than 40,000 paying customers. The company offers a sophisticated AI-powered copywriting tool that enables businesses to produce unique and engaging marketing content, such as articles, blog posts, advertisements, landing pages, and product descriptions. Users can select from various templates and input descriptions to generate tailored copy efficiently, enhancing productivity while reducing costs. Additionally, Writesonic features a no-code AI chatbot platform, allowing businesses to create personalized chatbots that reflect their brand voice and utilize their own data. The company has received significant positive feedback, evident from over 15,000 five-star reviews on platforms like G2, TrustPilot, and Capterra. Backed by Y Combinator and a strong network of investors in Silicon Valley, Writesonic is focused on building a sustainable business model driven by real revenue.
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