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FinX vs Superday AI: an honest comparison (September 2026)

Last checked 27 September 2026. We read Superday AI's public pages and used a trial account. Every fact about Superday AI links to its source. If something's out of date, email david@finxacademy.org and we'll fix it.

The short version

Choose Superday AI if you're preparing for banking interviews and want AI mock interviews, drills and a modeling course in one app. Choose FinX if you want to build whole models yourself, LBOs included, with each formula checked and the wrong cell shown, and to pay once.

At a glance

Superday AIFinX
Price$12 a month, $30 a quarter, or $85 lifetime[2]See pricing
Renews?Monthly and quarterly renew until you cancel. Lifetime is one payment[2][3]The one-time price never renews. Monthly renews until you cancel
Free way inThe first modeling lesson, with no account. It teaches keyboard moves, not formulas. A 5-day trial on the monthly and quarterly plans[4][2]46 exercises free, no account, and the 10-minute skills check
How your work is checkedModeling lessons check your formulas: a reordered formula passes and a typed-in number is sent back. Interview answers are marked by AI[5][7]Every formula cell in course exercises, for its result and the cells it uses
Timed LBO testNo. Its 45-minute model test is a DCF. A PE Pack with 60-, 90- and 180-minute LBO tests is listed as in development[5][6]Not yet (in progress). Timed today: a 10-minute skills check and a 2-hour 3-statement and DCF test
CertificateNone. Its FAQ says so[4]Course certificate of completion
Video lessonsAI-generated, narrated whiteboard lessons and audio guides[1]No: written lessons and exercises
RefundNone. Fees are non-refundable except as required by law[3]Full refund within 30 days on the one-time purchase, even after you start

Superday AI: checked 27 September 2026. FinX: checked 28 September 2026; the price is read live from our checkout.

Where Superday AI is better

  • Interview practice. Superday runs AI mock interviews by voice or text, with follow-up questions and a scored report. FinX has no interview practice.[7]
  • Much more than modeling in one app: drills (5,000+ by its own count), a coach chat, resume review, a networking CRM, SIE prep and an iOS app.[1]
  • A result page that teaches. After its 45-minute model test you get a score by topic, the first cell that broke and what its knock-on errors cost, and your formula beside the model's.[5]

What FinX doesn't have

  • No video lessons.
  • No timed LBO test yet.
  • A spreadsheet in your browser, not desktop Excel.
  • No reviews yet.

Where FinX is better

Of the seven practice and course sites we tested in September 2026, one other checks formulas cell by cell.

  • More LBO practice today. Superday's LBO is a six-lesson Basic LBO and its timed test is a DCF. FinX's LBO & M&A course runs from a paper LBO to a full buyout model, investor returns and accretion and dilution.[5]
  • No AI marks your numbers. In our test, Superday's AI mock interview marked a correct paper LBO answer 5/10. FinX checks each formula and the cells it uses against a worked model.[7]
  • The free exercises show the check. Superday's free lesson teaches keyboard moves only, so you don't see its formula checking before you sign up. FinX's free exercises are checked the same way as the paid ones.[4]
  • Hints that come a step at a time. Superday's hint shows the exact answer formula, and one click on "Show me" gives it away. Each FinX hint goes one step further: a nudge, then the method, then, where the answer is a formula, its shape with the cell references blanked out, and the answer last.[5]
  • One price covers everything. Superday's lifetime plan promises every future drill, mock and lesson, but the PE Pack is sold at $149 on top of any plan.[2][6]
  • A refund if it doesn't help. FinX refunds its one-time purchase in full within 30 days, even after you start. Superday's fees are non-refundable, and its trials turn into paid plans unless you cancel.[3]

Where neither helps

  • Neither sells a graded, timed LBO test today. Superday's PE Pack is in development, and FinX's timed LBO tests are in progress.[6]

Superday AI prices on 27 September 2026

PlanPriceTerms
Monthly$12 a monthRenews monthly until cancelled. 5-day trial[2][3]
Quarterly$30 a quarter (shown as $10/mo)Renews every quarter until cancelled. 5-day trial[2][3]
Lifetime$85 onceOne payment, no trial[2]
Private Equity Pack$149 onceIn development. Sold separately from any plan[6]

Choose Superday AI if…

  • You're a US undergraduate preparing for banking interviews and want AI mock interviews, drills and a modeling course in one app.[1][7]
  • You want a formula-checked modeling course for $85 lifetime, and a basic LBO is as far as you need to go.[5][2]

Choose FinX if…

  • You want to build whole models yourself, with each formula checked and the wrong cell shown.
  • Your test is an LBO, and you want more than a basic LBO to practice on now.
  • You want to pay once, with a full refund within 30 days if it doesn't help.

Sources

  1. [1] Superday AI homepage, public page, checked 27 September 2026.
  2. [2] Superday AI pricing page, seen signed in to a trial account, checked 27 September 2026.
  3. [3] Superday AI terms, public page, checked 27 September 2026.
  4. [4] Superday AI financial modeling page, free lesson and FAQ, public page, checked 27 September 2026.
  5. [5] Superday AI Financial Modeling course and its 45-minute model test, used in a trial account, checked 27 September 2026.
  6. [6] Superday AI Private Equity Pack, seen in a trial account, checked 27 September 2026.
  7. [7] Superday AI mock interview, M&A and LBO, used in a trial account, checked 27 September 2026.
  8. FinX: pricing, refund policy and course catalogue, checked 28 September 2026.
Try the free Paper LBO and judge the check yourself