Connecting an AI assistant to your finances: what each approach allows
Connecting an AI assistant to your finances means choosing where the numbers come from. Aggregation reads your accounts for you and needs those credentials. Declared holdings ask you to type them in and never touch a bank. Both feed the same protocol; the trade-off is convenience against exposure.
Six products now let an assistant reach a portfolio, and one of them is built into the assistant itself. They are usually compared on features, which tells you little. The decision that actually changes what you are exposed to is made before any feature: where the numbers come from.
| Data origin | Writing via MCP | Open source | Price | |
|---|---|---|---|---|
| Finvygo | Declared by you, no bank link | Yes, on your confirmation | No | Free, no tier |
| Truthifi | Bank aggregation | No, read-only | Not documented | $79.99 a year |
| Wealthfolio | Broker sync announced | Yes, if you allow it | Yes | Not documented |
| Finlynq | Bank or file import | Yes, read and write | Yes, AGPL v3 | Free |
| Monarch | Bank aggregation | Not documented | Not documented | Not documented |
| ChatGPT (Finances) | Bank aggregation (Plaid) | Not applicable, not an MCP server | No | Not stated on the cited page. United States only |
The axis that actually separates them
Aggregation connects to your accounts and pulls positions in. Truthifi describes reaching 18,000 institutions through Plaid, Yodlee and Morningstar ByAllAccounts (1); Monarch builds its product on syncing accounts in real time (4). It is the most comfortable option and, by construction, the one that asks for the most.
OpenAI has since built the same thing into the assistant itself: its Finances feature links accounts through Plaid, in the United States (5). It is not an MCP server, and that is exactly why it belongs here: on the question this article answers, built-in aggregation has become the default reply.
Declared holdings sit at the other end. Finvygo has no aggregator and no broker credentials at all: you type what you own. That is a real cost, paid in minutes at every purchase, and it is the honest way to describe it. What you get back is that no third party holds a key to your accounts, because there is no key.
Reading is not writing, and the gap is where the risk sits
An assistant that reads tells you things. An assistant that writes changes your records, and the mistake survives the conversation. On this question the six land in four different places.
Truthifi is read-only by architecture rather than by policy (1), which is the strongest form of that promise. Wealthfolio and Finlynq both expose writes: Wealthfolio behind scopes you grant for activities and classification (2), Finlynq across a broad set of tools described as read and write (3). Finvygo allows one write, adding a holding, and only after a confirmation you answer yourself. Monarch does not document MCP writes publicly (4), and ChatGPT does not go through MCP at all (5), so on this axis the question does not arise for it.
Free and open source are two different promises
The paid options are explicit. Truthifi lists 79.99 dollars a year for the plan that includes MCP access, with a free tier that does not (1). Monarch states no price on its pricing page beyond a one-week trial (4), and the page announcing Finances states none either, only that it is available in the United States (5). Both are worth knowing before you start comparing numbers.
Three questions worth answering before you connect anything
Where do the numbers come from, and am I comfortable with what that requires? Aggregation needs credentials to your accounts, held by someone. Declaration needs your time.
Can the assistant write, and if so, how is that gated? A confirmation you have to answer yourself is not the same as a scope you granted once and forgot. And finally: how do I revoke, and from where? The answer should be a page inside the application, not a support request.
There is no ranking here, because these products are not solving the same problem. If you want your accounts pulled in automatically, aggregation is the answer and its price is the access it requires. If you would rather nobody held a key to your bank, declaring your holdings costs you time and gives you that. Price, licence and write access follow from that first choice more than they precede it.
Frequently asked questions
Which of these connects to my bank?
Truthifi and Monarch are built on aggregation, ChatGPT links accounts through Plaid, and Finlynq offers a bank connection alongside file imports. Wealthfolio announces broker sync. Finvygo does not connect to banks at all: holdings are declared by the user.
Can an assistant add a position for me?
It depends on the product. Finvygo allows it after a confirmation you answer yourself, Wealthfolio and Finlynq expose write tools, and Truthifi is read-only by design. Monarch does not document MCP writes publicly.
Does my portfolio end up at the AI company?
Whatever the assistant reads passes through the assistant, and that is true of every product here. What differs is how much you expose per question, and whether the connection can be revoked from the application. Check both before connecting.
Do I have to pay to connect an assistant?
Not necessarily. Finvygo and Finlynq are free. Truthifi puts MCP access behind its paid plan at 79.99 dollars a year. Wealthfolio, Monarch and ChatGPT state no price on the pages compared here.
Can I keep everything on my own machine?
Wealthfolio runs as a local desktop app and Finlynq can be self-hosted under AGPL v3. Finvygo is a hosted service, with storage and server rendering in the European Union.
Why does Finvygo not connect to banks?
Because the alternative is someone holding credentials to your accounts. Declaring your holdings takes longer, and we would rather state that cost than hide it. If automatic sync matters more to you, another product on this list will suit you better.
Sources
Sources checked on August 11, 2026.
Go further
Ready to take control of your wealth?
Join Finvygo for free and start tracking all your assets in one place.
Create my free account