Domain Money vs Fidelity Go: 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 plans built by CFP professionals, delivered as a one-off project and paid as a flat fee.

How it works: You pay a fixed price for a plan built with a CFP professional across a defined set of sessions, covering cash flow, goals, tax awareness and investment strategy. You then implement it at your own accounts. There is no assets-under-management fee because nothing is under management.

In practice, Domain Money’s AI none; human planning. It is a robo-advisor (hands-off automated investing), best suited to a one-time flat-fee financial plan you implement yourself. On connecting an account: no (you keep and implement at your own accounts). On execution: you place them. Cost: $3,900 to $9,000 in year one, then $2,900 to $8,000/yr (Oct 2026).

One real limitation: You implement the plan yourself, and there is no ongoing management, which is the point and is not what everyone wants.

Fidelity's automated service, free below a stated balance and built from zero-expense-ratio Fidelity Flex funds. Best for people starting out.

How it works: A questionnaire sets the allocation, and Fidelity invests it in its own Flex mutual funds, which carry no expense ratio because Fidelity earns the advisory fee instead. Below a stated balance there is no advisory fee at all, which makes it one of the genuinely free ways to get a managed portfolio; above it, a flat percentage applies.

In practice, Fidelity Go’s AI automates a Fidelity Flex fund portfolio. It is a robo-advisor (hands-off automated investing), best suited to small balances, where it is free. On connecting an account: no (holds your money at Fidelity). On execution: automated. Cost: $0 under $25,000, then 0.35%/yr, no minimum to open (Oct 2026).

One real limitation: No tax-loss harvesting, which removes the strongest argument for a managed taxable account.

Category comes first. Domain Money focuses on a one-time flat-fee financial plan you implement yourself (none; human planning), and Fidelity Go on small balances, where it is free (automates a Fidelity Flex fund portfolio). On broker connection they differ too: Domain Money is “No (you keep and implement at your own accounts)” versus Fidelity Go at “No (holds your money at Fidelity)”. 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.

• Domain Money: does not see your holdings. Domain Money 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.
• Fidelity Go: manages a separate account it holds. Fidelity Go 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 Fidelity Go.

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 Domain Money if you want a one-time flat-fee financial plan you implement yourself. Its AI none; human planning, and it costs $3,900 to $9,000 in year one, then $2,900 to $8,000/yr (Oct 2026). It is built for someone who wants expert planning at a known price and is willing to place the trades and open the accounts themselves. Keep in mind: you implement the plan yourself, and there is no ongoing management, which is the point and is not what everyone wants.
• Choose Fidelity Go if you want small balances, where it is free. Its AI automates a Fidelity Flex fund portfolio, and it costs $0 under $25,000, then 0.35%/yr, no minimum to open (Oct 2026). It is built for someone with a smaller balance who wants automation at no cost and holds it in a retirement account where harvesting would not apply anyway. Keep in mind: no tax-loss harvesting, which removes the strongest argument for a managed taxable account.
• 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 both sit in the same category, the choice comes down to the finer details above. Their basic approach is the same.

Cost is easy to misread when two tools charge in different shapes, so compare the model, not just the number. Domain Money: $3,900 to $9,000 in year one, then $2,900 to $8,000/yr (Oct 2026). Fidelity Go: $0 under $25,000, then 0.35%/yr, no minimum to open (Oct 2026). 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 Domain Money and Walnut vs Fidelity Go.