Astor

Astor, operated by Gaus, Inc., is an SEC-registered investment advisory platform that provides AI-generated investment guidance to retail investors. Users link existing brokerage and financial accounts (via Plaid, per the company's site) and the service analyses their holdings across performance, risk and diversification before delivering personalised recommendations. Interaction is conversational: customers can text or call the AI advisor 24/7, ask questions such as how to allocate new income or why a portfolio is down, and receive daily market recaps filtered to their own positions, deep research briefs, and comparisons of portfolio performance against indexes such as the S&P 500.

The advisory service is non-discretionary — Astor does not execute trades, and all investment decisions remain with the user. The company states it operates under a fiduciary duty and that advice generated by its agents is fact-checked internally; co-founder Bruno Koba holds a Series 65 licence. Astor describes bank-grade encryption, third-party penetration testing, and an in-progress SOC 2 Type II audit. Its product is built on a multi-agent architecture using Anthropic models, and the mobile app is currently iPhone-only.

Positioning targets the gap between institutional and retail investors: Astor argues traditional advisers typically require around $500,000 in assets, leaving most US investors without professional guidance, while general-purpose chatbots are not optimised for personal finance. Marketing on the company site is aimed at "busy professionals" including tech workers with RSUs and illiquid stock, consultants, bankers and founders.

Founding story

Bruno Koba and Daniel Tulha grew up in Brazil, where opening a brokerage account customarily comes with an assigned financial adviser regardless of account size. After moving to the United States, they found professional advice was generally reserved for wealthy clients while most investors managed portfolios alone or with general-purpose chatbots. They founded Astor in 2025 to close that gap and joined Y Combinator's Summer 2025 batch. Koba, the CEO, was previously a data scientist at Nubank and a fintech investor at Monashees, and attended Stanford GSB; Tulha, the CTO, was an engineer at Stripe, Robinhood and Amazon.

Business model

Consumer subscription software: Astor sells access to an AI advisory app directly to individual investors. The App Store listing shows a free download with in-app purchases and an "Astor Pro" tier. Astor is registered with the SEC as an investment adviser and provides non-discretionary advice rather than managing or executing trades.

Subscription pricing of $15 per month, with a $40 unlimited "Pro" version, as reported in April 2026.

Traction

As of April 2026 the company reported roughly 4,000 paying customers and more than $200m in brokerage assets connected to the platform. The company website cites over 8,000 users, more than $500m connected, and a 4.8/5.0 rating; its iOS app showed a 4.7 average from 324 ratings. Team size was listed at 5.

Latest developments

In April 2026 Astor announced a $5m seed round led by Monashees, with participation from Y Combinator, Goodwater Capital, Gilgamesh Ventures, 468 Capital, Valutia, Sunshine Lake, and individual investors from Stripe and OpenAI. The company said funds would go toward product, engineering and growth and to expanding its service offerings. A SOC 2 Type II audit was in progress, and backtesting was named as a feature under consideration.