Magnifi vs SigFig: 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.

A conversational AI investing assistant you can ask natural-language questions about funds and holdings, with account-connection features. Best for research and discovery in plain English.

How it works: Magnifi is built around a chat box: you ask plain-English questions like "what are low-cost clean-energy ETFs?" or "how diversified am I?" and it surfaces investments, side-by-side comparisons, and observations. You can link accounts so its answers reflect what you actually hold, and it points you toward funds and stocks to consider.

In practice, Magnifi’s AI conversational fund/stock research. It is an AI stock research and scoring tool, best suited to research and discovery in plain English. On connecting an account: partial. On execution: read / discovery. Cost: free plan; Premium is a paid subscription (as of October 2026).

One real limitation: Skews toward fund discovery; it is weaker at managing a concentrated stock portfolio.

An automated investing service that manages accounts held at your existing broker, so you do not move money.

How it works: There is no new account to open: you link an existing brokerage account at a supported custodian and SigFig manages it in place, rebalancing and running tax-efficient strategies. Below a stated balance the management is free. This structure is unusual: nearly every competitor requires custody of your assets.

In practice, SigFig’s AI automates a portfolio in accounts you already hold. It is a robo-advisor (hands-off automated investing), best suited to automation that manages your existing Schwab or Fidelity account. On connecting an account: yes, it manages accounts held at supported brokers. On execution: automated. Cost: up to 0.50%/yr, $2,000 minimum (Oct 2026).

One real limitation: Supported custodians are limited, so it only works if your account is already at one of them.

Category comes first. Magnifi focuses on research and discovery in plain English (conversational fund/stock research), and SigFig on automation that manages your existing Schwab or Fidelity account (automates a portfolio in accounts you already hold). On broker connection they differ too: Magnifi is “Partial” versus SigFig at “Yes, it manages accounts held at supported brokers”. 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.

• Magnifi: partial account connection. Magnifi offers some account-connection features, but it leans toward research and discovery. It does not keep a full, continuous read of your real positions.
• SigFig: connects specific supported accounts. SigFig connects a defined set of accounts (Yes, it manages accounts held at supported brokers), so whether it can see your holdings depends on whether your money is at one of them.

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 Magnifi if you want research and discovery in plain English. Its AI conversational fund/stock research, and it costs free plan; Premium is a paid subscription (as of October 2026). It is built for investors who want to research and discover funds by chatting in plain English. Keep in mind: skews toward fund discovery; it is weaker at managing a concentrated stock portfolio.
• Choose SigFig if you want automation that manages your existing Schwab or Fidelity account. Its AI automates a portfolio in accounts you already hold, and it costs up to 0.50%/yr, $2,000 minimum (Oct 2026). It is built for someone with an existing account at a supported broker who wants it managed without moving anything. Keep in mind: supported custodians are limited, so it only works if your account is already at one of them.
• 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 research and discovery in plain English and the other for automation that manages your existing Schwab or Fidelity account, 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. Magnifi: free plan; Premium is a paid subscription (as of October 2026). SigFig: up to 0.50%/yr, $2,000 minimum (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 Magnifi and Walnut vs SigFig.