Human Interest has attracted heavyweight backers like Morgan Stanley, BlackRock, and The Rise Fund, and closed a $100 million funding round in October 2025 that more than doubled its valuation to about $3 billion.

Polymarket is discussed as a crypto-oriented platform, with its 2025 trading volume totaling $30 billion.

Fintech investing apps face scaling challenges, with Robinhood and Wealthfront cited as examples, even as consumer-facing prediction markets such as Kalshi and Polymarket are growing quickly.

Kalshi posted $23.8 billion in trading volume in 2025, expanded to 1.2 million users, and reached an $11 billion valuation by December 2025; early 2026 activity includes a weekly trading volume around $2 billion.

Capitalize has raised $35 million in funding from investors including RRE Ventures, Canapi Ventures, and Bling Capital, driving triple-digit growth to roughly 20 customers in 2025.

A central thread across Capitalize, Human Interest, and Kalshi is the focus on 401(k) rollovers and retirement services inside fintech investing.

Human Interest automates 401(k) setup and management for about 40,000 small-business customers, spanning retail, restaurants, and nonprofits, with 2025 revenue at $150 million, $8 billion in assets under management, and a valuation of about $3 billion after its October 2025 funding.

Capitalize is profiled for helping users locate old 401(k) accounts and facilitate rollovers, with embedded software adopted by Robinhood, SoFi, Betterment, and new clients like Public, Webull, and E*TRADE; 2025 annual rollover volume reached about $5.5 billion.