R

Rational

AI employees for accounting teams: software that keeps books, prepares reconciliations, month-end close and tax work, and automates payables and receivables for startups and enterprise finance teams, with human review of the output; the terms state it is not a CPA firm.

StageUndisclosed

Founded2026

HeadquartersSan Francisco, USA

StatusPrivate

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

• Rational AI agent Sold on its own

  Agentic accounting service in which AI employees keep books up to date with human review, prepare reconciliations, monthly statements and close, support tax filing, and automate payables and receivables across a customer's own ledger and approval process; the terms state output is for the customer's review and that Rational is not a CPA firm; sold from $399 a month with an annual agreement for startups (whose page offers a waitlist) and by demo for enterprise teams.

Similar products 15

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

AAlderUndisclosedRational and Alder both list accounting automation; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareBABillow AI LabsUndisclosedRational and Billow both list accounting automation; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareRRexUndisclosedRational and Rex both list accounting automation; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareCClerkedUndisclosedRational and Clerked AI clerks both list accounting automation; scale not recorded for either.1 of 2 capabilitiesShared product typeCompareBBrexAcquiredRational and Brex expense and bill pay AI both list accounting automation; Rational's scale not recorded; Brex is acquired, with no independent scale; ships application rather than the same layer.2 of 2 capabilitiesDifferent layerCompareAHAltair HealthUndisclosedRational and Altair AI billing both list accounting automation; scale not recorded for either; ships application rather than the same layer.2 of 2 capabilitiesDifferent layerCompareLLuminaDataUndisclosedRational and Reconciliation Agent both list accounting automation; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareBBasisLate-stageRational and Basis both list accounting automation; Rational's scale not recorded.2 of 2 capabilitiesShared product typeCompareDDenkiUndisclosedRational and Denki both list accounting automation; scale not recorded for either; ships application rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSAStemma AIUndisclosedRational and Stemma both list accounting automation; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareRRilletLate-stageRational and Rillet Aura AI both list accounting automation; Rational's scale not recorded.2 of 2 capabilitiesShared product typeCompareWWorkdayPublicRational and Accounting Agent both list accounting automation; Rational's scale not recorded.2 of 2 capabilitiesShared product typeCompareTRThomson ReutersPublicRational and ONESOURCE Indirect Compliance powered by CoCounsel both list accounting automation; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareIIntuitPublicRational and Accounting AI both list accounting automation; Rational's scale not recorded.2 of 2 capabilitiesShared product typeCompareMMicrosoftPublicRational and Finance agents both list accounting automation; Rational's scale not recorded.2 of 2 capabilitiesShared product typeCompare

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.

Sources

Total funding

Not found · 20 Oct 2026

Pages read for this record state no funding total. Tried the home, product, terms and privacy pages and the company's YC profile.

Valuation

Not found · 20 Oct 2026

Pages read for this record state no valuation. Tried the home, product, terms and privacy pages and the company's YC profile.

Founded

Company disclosure · 20 Oct 2026

Own YC profile lists Founded: 2026; rational.to states no founding year.

Public listing

Not found · 20 Oct 2026

No listing on the pages read; treated as private.

Description

Official documentation · 20 Oct 2026

Terms of Service: "Rational provides AI-assisted software for accounting work, including bookkeeping, reconciliation, close, and tax-preparation workflows." The footer reads "Rational"; the terms and privacy pages name Rational, Inc.

Open Rational in the directory

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