Mezzi vs. Koyfin: Investment Research, Portfolio Analysis, and Guidance

Updated September 26, 2026.

Koyfin is worth evaluating when you want to investigate securities, markets, and portfolio analytics directly. Mezzi is worth evaluating when you want guidance on decisions across connected finances and saved personal context. Koyfin also has personal portfolio tools; describing it as market data without portfolio analysis would miss a substantial part of the product.

A fair comparison starts with the task. Researching a company's financial history, measuring a portfolio's behavior, and deciding how an investment fits your household are related but different activities. You may want one tool for several jobs or separate tools with clearly defined roles.

Compare the job you need done

Sources: Koyfin plans, Koyfin plan guide, and Mezzi account groups.

Koyfin: research with the underlying data in view

Koyfin's research offering includes company financial information, estimates, filings, transcripts, screening, and charting, with access varying by plan. Its current Plus tier expands the research available beyond Free. Koyfin pricing and features

The appeal is control over the investigation. If you want to compare businesses on a consistent metric, inspect a filing, or follow how a measure changes over time, a research workspace can make that process repeatable.

That is a different job from asking whether an investment fits a personal goal. A company can look attractive on selected metrics while adding exposure you already have or tying up money needed for a different purpose. Research can inform the decision without completing it.

A useful trial should therefore follow a real research question. Select two or three securities, define the comparison, inspect the data's period and units, and check that the result supports the inference you are making. More available data is valuable only if you can use it correctly.

Koyfin also analyzes personal portfolios

Koyfin's current plan guide distinguishes My Portfolio from advisor model and client portfolios. Personal tracking is available, while Premium adds capabilities such as portfolio risk statistics, hypothetical performance, and short-position support. Koyfin current plan guide

Those distinctions matter. It would be unfair to compare Mezzi's portfolio functionality with a Koyfin watchlist alone, just as it would be misleading to imply that every advisor integration is included in a personal subscription.

For a personal portfolio trial, bring a known set of holdings and inspect how the account is represented. Check the available input method, transactions or lots where relevant, and the reporting period. If you compare returns, understand what the calculation includes before interpreting the result.

Historical or hypothetical analytics can help investigate a portfolio, but they do not establish what it will do next. Use them to test assumptions and understand behavior, not to turn an attractive past result into a promise.

Advisor plans are a separate product decision

Koyfin's advisor offerings add client and model portfolio workflows, reports, and specified custodian integrations. The number and type of integrations and reports depend on the tier. Koyfin full plan comparison

An individual managing personal accounts should not assume they need an advisor plan merely because the feature list looks broader. An advisor serving clients should not assume a consumer guidance app replaces reporting, firm controls, or operational integrations.

State which buyer the comparison serves. This article focuses primarily on an individual choosing tools for their own financial decisions. Professionals evaluating practice software need a separate requirements review.

Mezzi: make the financial question specific to you

Mezzi's account groups include investments, banking, other assets, and liabilities. A checking balance, savings goal, card balance, or manually entered property can be relevant alongside investment holdings. AI Personalization stores goals, preferences, and background. Mezzi account-group update

The purpose is to connect the analysis to a decision. For example, an investor researching a new fund may also need to understand how it overlaps with existing holdings and whether the money has a near-term use. Those questions require more context than a fund's standalone characteristics.

Exposure X-Ray helps examine underlying exposures in supported funds. A finding can prompt a more precise discussion: is an apparent concentration intentional, is the relevant account included, and what information would be needed before considering a change?

Mezzi does not execute trades or transfer money. It also should not be assumed to replace every research dataset, custom formula, chart, or report available in Koyfin. Verify the exact capability your workflow requires.

A useful example: from a research idea to a household decision

Suppose an investor is comparing a proposed sector fund with current holdings. The research record should name the fund, holdings date, fee, benchmark and the question being tested. Koyfin's documented personal-portfolio tools also deserve credit: Free covers one account; paid plans expand the account scope, while Premium adds portfolio risk statistics and hypothetical performance. That is a meaningful portfolio workflow, not merely a quote screen. Koyfin plan guide

For a simple illustration, an investor has $150,000 across two accounts, with $12,000 in one company directly and $60,000 in a fund that holds 5% in it. The estimated company exposure is $15,000, or 10%, before other funds. Adding a $10,000 fund position with an assumed 20% weight in the same company would add $2,000 of exposure. If funded with new money, the new ratio is $17,000 divided by $160,000, or about 10.6%; if funded by selling an existing holding, the denominator and removed exposure must be handled differently.

Use the research and portfolio views to inspect that investment question. Use Mezzi to add the purpose of the money, account restrictions and the effect of an upcoming expense. Both should receive the same accounts and assumptions if you compare explanations. Neither should count unavailable fund data as zero exposure.

The outcome to keep is not a generic score. It is the proposed change, its funding source, the exposure before and after, and the facts still missing. If the decision requires a particular Koyfin risk statistic or historical simulation, verify its tier; do not imply Mezzi reproduces every research control. If the household constraint is the unresolved issue, test that specific conversation in Mezzi before paying for another service.

How to compare the prices

Koyfin's current public pricing lists Free, Plus at $39 monthly, Premium at $79 monthly, Advisor Core at $209 monthly, and Advisor Pro at $299 monthly. Annual billing discounts are advertised; confirm the selected billing term and checkout total. Koyfin pricing

Mezzi offers Free, Advisory at $399 annually, and Concierge at $999 annually. Review the guidance and service limits of each plan against the work you expect to do. Mezzi pricing

Do not compare the most expensive professional tier with a consumer subscription to manufacture a large savings figure. Compare the least expensive tier that actually supports the required workflow. If you need both research and guidance, include both costs in the decision.

A disciplined trial can identify unnecessary overlap. Write down the questions each tool answers that your existing setup cannot. If a paid feature does not change your research or decision process, its presence on a feature list is not a reason to subscribe.

Check data and assumptions, not just presentation

For either product, check the information behind an output. Confirm security identity, account scope, dates, and any manual inputs. A clear chart or fluent explanation can still reflect an incomplete starting point.

When comparing holdings, use the same portfolio definition. When comparing performance, use consistent periods and understand the treatment of cash flows. When discussing a goal, supply the same timing and constraints.

Ask what would change the conclusion. In a research workflow, that might be a different metric or assumption. In a guidance conversation, it might be an omitted liability or a goal with a shorter horizon. An answer becomes more useful when its boundaries are visible.

Which should you choose?

Choose Koyfin for evaluation when your work centers on research, direct inspection of financial data, or the specific portfolio analytics its plans provide. Its personal and professional workflows deserve to be evaluated on their actual scope.

Choose Mezzi for evaluation when your work centers on financial decisions that span existing accounts and personal circumstances. The strongest test is whether one focused conversation gives you clearer assumptions, alternatives, and next steps.

Use both when they perform distinct jobs you value. Neither service needs to be portrayed as inadequate for the other to be useful.

Frequently asked questions

Does Koyfin track personal portfolios?

Yes. Koyfin has My Portfolios, with capabilities varying by tier. Its advisor client-portfolio integrations are a separate workflow and should not be confused with personal tracking.

Is Koyfin only for professional investors?

No. It has plans for individual users as well as advisors and teams. Evaluate the features and costs relevant to your own work.

Can Mezzi replace every Koyfin research feature?

This comparison does not claim that. If a particular dataset, custom calculation, chart, or report is essential, verify it directly before changing tools.

Can either tool guarantee better investment results?

No. Useful research and guidance can support a decision process, but future outcomes remain uncertain and investments can lose value.