43

Founded in 2021, 43 is an early-stage venture capital firm based in San Francisco. It invests in pre-product startups and works closely with founders to help them achieve product-market fit.

Soso Sazesh

General Partner

8 past transactions

Riza

Seed Round in 2025
Riza offers APIs that let LLMs safely and autonomously run the code they write, so you can build more reliable, powerful, and accurate AI apps. API-first, no infra setup. Code starts running in <10ms.

Kaiden AI

Pre Seed Round in 2025
Kaiden AI specializes in providing immersive, voice-driven simulation training for law enforcement and public safety professionals. Its platform offers realistic, customizable scenarios that help officers build confidence and refine crucial skills such as communication, decision-making, and de-escalation. The system adapts in real-time to users' responses, providing actionable feedback to enhance preparedness for high-pressure situations. Kaiden AI is trusted by police academies and agencies, ensuring its training aligns with local protocols for relevance and effectiveness.

Secludy

Pre Seed Round in 2024
Secludy specializes in AI training data privacy. It offers a platform that generates synthetic datasets mimicking original data, enabling safe, compliant AI model training without exposing sensitive information like PII. Key features include fine-tuning large language models, cloud deployment, and adherence to GDPR, CCPA, and HIPAA regulations.

Cimphony

Pre Seed Round in 2023
Cimphony is an AI-powered platform that supports businesses at every stage of growth. From incorporation to fundraising, employment compliance, and more, Cimphony streamlines legal processes, allowing clients to focus on building their company.

Aura Finance

Pre Seed Round in 2023
Aura is a financial wellness platform that offers money management solutions through goal-based investing. The company develops software that provides a comprehensive range of asset management services, including personalized portfolios and trading options. By integrating behavioral psychology into its approach, Aura aims to create a hyper-personalized investment management tool designed to alleviate stress and anxiety related to financial matters. In addition to its investment services, Aura combines behavioral coaching and financial education, offering mobile coaching programs for employees. This holistic approach not only enhances individual financial well-being but also supplies employers with insights into employee stress, health, and productivity. Ultimately, Aura seeks to empower customers and investors by providing access to sound financial advice and the potential for improved returns on their investments.

Sharebird

Pre Seed Round in 2023
Sharebird helps you get credible on-the-job advice from the leaders in top companies. It's like working with 100 of the best mentors by your side.

Onton

Seed Round in 2022
Onton develops an e-commerce search engine platform that enables users to search for products across thousands of online stores using natural language, images, or both. Its platform employs knowledge graphs and language models, offering an ad-free, SEO-focused, privacy-centric search experience tailored for furniture and home decor products.
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