Double offers an automated investing platform that builds direct‑indexed portfolios from over 50 broad market indexes or custom selections, buying fractional shares to match the underlying weights. The service provides commission‑free trading, tax‑loss harvesting, and tax‑aware rebalancing, all for a flat $1 per month subscription with no expense ratios or AUM fees.
Funding
$3.3M raised to dateRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.



9OFounders
Product
Problem
Investors seeking diversified market exposure often pay expense ratios and asset‑under‑management (AUM) fees through traditional ETFs or mutual funds, which reduce net returns. Additionally, standard fund structures limit opportunities for tax‑loss harvesting and personalized portfolio adjustments.
Solution
Double provides an automated investing platform that creates direct‑indexed portfolios by purchasing fractional shares of the underlying stocks at the same weights as chosen indexes or ETFs. The service handles daily portfolio monitoring, tax‑aware rebalancing, and automated tax‑loss harvesting without charging expense ratios or AUM fees. Users pay a flat $1 per month subscription, and all trades are executed commission‑free through a SEC‑registered fiduciary custodian (Apex Clearing). The platform also offers tools for dollar‑cost averaging across multiple strategies and real‑time portfolio adjustments, delivering a low‑cost, tax‑efficient alternative to conventional fund investing.
Target Audience
Retail investors and self‑directed traders who want diversified market exposure with minimal fees and automated tax optimization.
Features
- Direct indexing of 50+ broad market indexes and custom portfolios using fractional shares
- Automated daily monitoring for wash sales, stock splits, dividends, and portfolio drift
- Tax‑loss harvesting and tax‑aware rebalancing to minimize taxable events
- Commission‑free trading with zero expense ratios and no AUM fees
- Dollar‑cost averaging between passive and active strategies within a single account
- SEC‑registered investment advisor status with assets held in the investor’s name at Apex Clearing
- SIPC insurance coverage up to $500,000 plus additional private insurance
- Two‑factor authentication and encrypted data storage for security