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Live August 2026 – present

Common Ledger

Monarch recently raised at an $850M valuation. I love the app, so I rebuilt it in less than 24 hours.

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common ledger screenshot

In less than a day’s worth of work, I built a Monarch clone and I’ll be cancelling my subscription ($15/month saved!). So, what makes Monarch so valuable in 2026? What defensibility does it still have and what power has AI extinguished?

The Bull Case

1. Branding power

When it comes to personal finance, cybersecurity breaches are a huge risk. Monarch’s been around for years and has built the credibility that customers’ data is safe.

2. Scale economies

I’m more dubious here, but there is a realistic chance that scale leads to a significant decrease in fees from services that link bank account data like Plaid.

The Bear Case

1. Switching costs aren’t negligible but they aren’t high either

Sure, you build your budget in Monarch, but it would only take 30 minutes to switch to another service. A new service could walk in and Monarch wouldn’t be very differentiated if at all (see: my 1-day clone).

Verdict

I see Monarch going a similar way as Mint — this product doesn’t have a clear path to economic viability. Its moat was largely its software and that’s evaporated.

Note, if you’d like to open an account, send me an email at benjaminheim43@gmail.com - the app can handle more users but this was built more for me and my friends and requires a little work on my end to open it up to a new user.