Facet vs Mezzi: Which Is Better in 2026?

Prices checked October 2026. A price marked (Oct 2026) was read on the vendor's own pricing page; others are described without a number because we could not verify one.

Flat-fee financial planning with a dedicated CFP professional, priced by complexity.

How it works: You pay an annual membership and are assigned a CFP professional who covers planning across tax, insurance, estate coordination and retirement, with investment management available inside it. Because the fee is flat and set by complexity, it does not rise as your portfolio grows, and that is its main argument against the percentage model.

In practice, Facet’s AI none; this is human planning. It is a robo-advisor (hands-off automated investing), best suited to flat-fee financial planning with a dedicated CFP. On connecting an account: no (manages assets it custodies, planning covers the rest). On execution: advisor-managed. Cost: $2,600, $5,500 or $8,700/yr flat, no asset minimum (Oct 2026).

One real limitation: The flat fee is large in absolute terms at small balances, so it only beats a percentage once you have enough assets or enough complexity.

Aggregates your accounts and layers AI insights with a tax-aware lens. Best for a consolidated view across holdings.

How it works: Mezzi aggregates your investment accounts into one view and layers AI insights over them with a tax-aware lens, flagging things like potential wash sales, fee drag, and unrealized-gain considerations across accounts. It is read-only: it tells you what it sees and what to consider, and you act at your broker.

In practice, Mezzi’s AI aggregates accounts + tax-aware insights. It is an AI investing app that connects the brokerage you already use, best suited to aggregated wealth tracking with AI. On connecting an account: yes. On execution: read. Cost: subscription.

One real limitation: Focused on tracking and insight; it does not build thesis-driven baskets.

Category comes first. Facet focuses on flat-fee financial planning with a dedicated CFP (none; this is human planning), and Mezzi on aggregated wealth tracking with AI (aggregates accounts + tax-aware insights). On broker connection they differ too: Facet is “No (manages assets it custodies, planning covers the rest)” versus Mezzi at “Yes”. That shapes everything downstream: how personal the answers are, where trades settle, and how much control you keep over individual positions.

Every tool gives something up for what it does well. Below is the give-and-take on each, so you can weigh the specific strengths against the limitations that come with them, beyond the headline category.

For AI investing tools, the distinction that matters most is whether the tool works from your actual, connected positions or reasons from something else: a separate account it manages for you, or the tickers and numbers you feed it. It decides how personal the answers can be, and where your money physically lives.

• Facet: manages a separate account it holds. Facet does not read the brokerage you already use. It opens and holds a new account, then invests the money you move into it, so its view is limited to what sits inside Facet.
• Mezzi: reads your real connected holdings. Mezzi connects your real brokerage (Yes) and works from your actual positions, so its answers reflect what you actually own.

This is where they diverge most. One works from your real, connected account while the other does not, so if you want an assistant grounded in the exact positions you already hold, that gap is the thing to weigh first. This holdings-aware angle is the one Walnut is built around: it connects the brokerage you already use and reasons from your live positions, read-only by default, with any trades left for you to approve.

Each one wins a different job, so the answer depends on which job you need done.

• Choose Facet if you want flat-fee financial planning with a dedicated CFP. Its AI none; this is human planning, and it costs $2,600, $5,500 or $8,700/yr flat, no asset minimum (Oct 2026). It is built for someone with a few hundred thousand or more, or real complexity, who wants planning more than portfolio management and objects to paying a percentage. Keep in mind: the flat fee is large in absolute terms at small balances, so it only beats a percentage once you have enough assets or enough complexity.
• Choose Mezzi if you want aggregated wealth tracking with AI. Its AI aggregates accounts + tax-aware insights, and it costs subscription. It is built for multi-account investors who want tax-aware tracking and insights consolidated in one place. Keep in mind: focused on tracking and insight; it does not build thesis-driven baskets.
• Choose Walnut if you want a keep, trim or exit read on the stocks you already own, and placing the trades you approve. It is an AI investing app that connects the broker you already use, and it costs free; Walnut Plus $9.99/mo on the web; no fee on assets.

Because they sit in different categories, this is not strictly either-or: some investors use one for flat-fee financial planning with a dedicated CFP and the other for aggregated wealth tracking with AI, and watch for overlapping costs.

Cost is easy to misread when two tools charge in different shapes, so compare the model, not just the number. Facet: $2,600, $5,500 or $8,700/yr flat, no asset minimum (Oct 2026). Mezzi: subscription. A percentage-of-assets fee scales with your balance, a flat subscription does not, and a “free” tier usually earns elsewhere (on cash, order flow, or premium upgrades), so the cheapest headline is not always the cheapest outcome for your situation.

Prices checked October 2026. Pricing and tiers change, so confirm the current numbers on each provider’s own site before you decide.

Walnut is an AI investing app, and it is the pick for a keep, trim or exit read on the stocks you already own, and placing the trades you approve (free; Walnut Plus $9.99/mo on the web; no fee on assets). It connects the brokerage you already use, read-only by default, gives each holding a keep, trim or exit read against the S&P 500, flags any position above a quarter of the portfolio, and places the trades you approve. You use it through its own assistant, or inside Claude or ChatGPT. See Walnut vs Facet and Walnut vs Mezzi.