Finance and accounting decision
Portfolio Coach
A basic portfolio-aware chat + live pricing dashboard is realistic for a single developer to build and maintain, but the full paid product (live broker integrations, UK wrapper-specific polish, and a polished UX/operations) is harder to reproduce.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Allow a user to import holdings, fetch live prices, compute portfolio/net-worth/allocation, and ask an LLM portfolio-aware questions that use the current holdings as context.
What it still won’t have
- Bank/broker direct imports and live account syncing
- Proprietary demo account and prefilled UK-specific wrappers
- Any vendor-provided model tuning or claimed GPT-5.6 integration
- Polished UI, analytics and multi-profile family management as shipped
What remains hard
- Product polish and ongoing maintenance
First-year cost
No published price
Portfolio Coach does not publish a price we could read, so there is nothing to compare against. What building costs is below.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal Portfolio Coach replacement using Node.js + Express, Postgres, React for UI, and OpenAI (or other) for LLM. In scope: CSV/manual import of accounts and holdings; background job to fetch market prices (e.g., Alpha Vantage or Yahoo Finance API) and compute per-holding valuation, net worth and asset-allocation; store data in Postgres; generate a concise portfolio context summary and send it with user questions to an LLM; a simple chat UI that shows portfolio brief and LLM responses. Out of scope: broker/bank OAuth integrations, tax/wrapping-specific automation, subscriptions, advanced analytics, multi-user family permissions. Include error handling for malformed CSVs, missing price data, API failures; include unit tests for import/parsing, valuation logic and prompt construction; include deployment scripts for a single Docker host and instructions for monthly maintenance tasks.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 2 cited sources+1
- Evidence score58
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 2
Every page the run actually retrieved.
- official productPortfolio Coach — official site
- open sourceachyuthkp27/kairo-offline-ai-bank (candidate prior art)
Integrity checks
What held up, and what did not.
