VibeCFO vs a DIY build: Claude, an MCP and a weekend
A Claude subscription and a raw MCP over your ledger will answer a simple question about one org, and it works well for that. Where it stops is depth (transactions, not summaries), breadth (blending sources), follow-up questions that go deeper, and staying correct across every client a firm carries without anyone watching.
Who a DIY build is best for
One org, one ledger, one simple question checked by hand. Fast, cheap, no procurement. A good use of a weekend.
Who VibeCFO is best for
Firms, multiple sources, or anything going in front of a board. Transaction-level data, cross-source answers, reconciled across every client entity.
VibeCFO (EVA) vs a DIY build
| Capability | VibeCFO (EVA) | a DIY build |
|---|---|---|
| Data depth | Transaction level - invoice lines, journals, timesheet rows | Whatever the API hands back. Typically summaries. |
| Across sources | Entities resolved across every connected system | One connector, one ledger |
| Blended answers | One answer, built across systems, in one question | Export from each and join yourself |
| Follow-up questions | Keeps going deeper and wider in the same conversation | Each one is a new prompt, often a new script |
| Across clients | Correct on every client you carry, unattended | Correct on the org you checked |
| Proof it is right | Reconciled per integration, traceable to source, tested in CI | You check the answer, once, by eye |
| Governance | Dedicated database per business, isolated per client | Yours to design and defend |
| Maintenance | Kept current as the frontier moves | You maintain it as models and APIs change |
The key difference
A DIY build answers one question about one org. VibeCFO answers the next four questions, across every source, for every client, and stays correct without anyone watching.
When to choose which
- Choose a DIY build for one org and ad hoc questions you are happy to check by hand.
- Choose VibeCFO for a firm, multiple sources, or anything going in front of a board.
FAQ
What does a DIY build actually do well?
One org, one simple question, fast and cheap. For ad hoc analysis on a single entity with a single source, it is genuinely good enough.
Where does a DIY build stop on depth?
A raw MCP returns summaries - trial balance, P&L, aged receivables. That answers the first question. It cannot answer why the number moved, because the transactions underneath were never pulled.
Where does it stop on breadth?
One connector sees one system. A blended answer needs the same customer resolved across every source. A single connector cannot do this because it can only ever see itself.
Is hand-checking the same as testing?
No. A builder loops until one answer looks right. That is one answer, checked once, by someone who knew what they were looking for. Our standard is right the first time, on questions nobody has asked yet, with nobody squinting at the output.
Can I use both?
Yes. The VibeCFO MCP points your own Claude at our reconciled store instead of at a raw ledger. You get the full Claude interface with transaction-level, cross-source, reconciled data underneath it.
Can you use both?
Yes. The VibeCFO MCP serves your reconciled, transaction-level data out to Claude or any MCP client. What comes down the wire is not a raw ledger endpoint - it is the ETL, the canonical schema and the reconciliation, served out. Your agent queries the same governed data that EVA uses.
See EVA on your own data
Start a free trial, or request a demo to see how VibeCFO compares for your business.
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Comparisons last verified: June 2026