Facet vs Prospero.ai: Which Is Better in 2026?

Figures and features are point-in-time and change; treat the table as a starting map, not a live quote.

Flat-fee financial planning with a dedicated CFP professional, priced by complexity rather than as a percentage of assets.

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 rather than balance, it does not rise as your portfolio grows, which is the entire pitch against the percentage model.

In practice, Facet’s AI none; this is human planning. It falls under hands-off automated investing (robo-advisors), which makes it best suited to flat-fee financial planning with a dedicated cfp. On connecting an account it is “No (manages assets it custodies, planning covers the rest)”, and on execution it is “Advisor-managed”. It is priced as flat annual membership by complexity (verify current).

One honest 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.

A retail-facing app that reduces machine-learning models of market data into a small set of per-stock signal scores.

How it works: Prospero runs models over market and fundamental data and outputs a handful of named signals per stock, presented as simple numbers so a non-technical user can act on them. The pitch is bringing institutional-style quantitative signals to retail investors in a readable form.

In practice, Prospero.ai’s AI produces proprietary signal scores per stock. It falls under ai stock research and scoring, which makes it best suited to ai-generated stock signals distilled into simple indicators. On connecting an account it is “No”, and on execution it is “No”. It is priced as free tier plus subscription (verify current).

One honest limitation: Signal scores are a prediction claim, and the app cannot see or analyse the portfolio you actually hold.

The core difference is category. Facet focuses on flat-fee financial planning with a dedicated cfp (none; this is human planning), and Prospero.ai on ai-generated stock signals distilled into simple indicators (produces proprietary signal scores per stock). On broker connection they differ too: Facet is “No (manages assets it custodies, planning covers the rest)” versus Prospero.ai at “No”. 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. Here is the honest give-and-take on each, so you can weigh the specific strengths against the limitations that come with them rather than judging on the headline category alone.

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.
• Prospero.ai: does not see your holdings. Prospero.ai works from market data and the tickers you research, not your live positions. You read its output, then act in whichever broker you keep your money at.

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.

There is no universal winner here; the right pick depends on the job you are hiring the tool for. Match the category to your intent rather than chasing a single “best.”

• Choose Facet if you want flat-fee financial planning with a dedicated cfp. Its AI none; this is human planning, it is priced as flat annual membership by complexity (verify current), and it fits hands-off automated investing (robo-advisors). It is built for someone with a few hundred thousand or more, or real complexity, who wants planning rather than portfolio management and objects to paying a percentage. Keep in mind that 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 Prospero.ai if you want ai-generated stock signals distilled into simple indicators. Its AI produces proprietary signal scores per stock, it is priced as free tier plus subscription (verify current), and it fits ai stock research and scoring. It is built for a retail investor who wants quantitative signals as one input among several, and treats the scores sceptically. Keep in mind that signal scores are a prediction claim, and the app cannot see or analyse the portfolio you actually hold.

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 ai-generated stock signals distilled into simple indicators, and just 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 is priced as flat annual membership by complexity (verify current), while Prospero.ai is priced as free tier plus subscription (verify current). 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.

Pricing and tiers change often. Confirm the current numbers on each provider’s own site before you decide; the framing above is point-in-time.

If neither quite fits, Walnut sits in a third category: chat-driven management of your own brokerage. It connects the brokerage you already use through SnapTrade, lets you analyze and manage it by talking through Claude or ChatGPT, build thematic portfolios around a thesis, and place trades you approve. Read-only by default. See Walnut vs Facet and Walnut vs Prospero.ai. Walnut is not an investment adviser.