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Unfortunately Double has shut down as of August 2025. Thanks for being part of the journey. Double is building a smarter brokerage account for retail investors, combining the best parts of active and passive investing. We allow anyone to build a custom ETF, easily test its performance and automate its trading. Targeting a younger tech forward cohort who are set to inherit $84T dollars over the next 20 years. Double is a part of the W24 YC Batch.

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Double is based in San Francisco, California.

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