Rational (YC S26) — AI employees for In-House enterprise accounting
Rational builds AI employees for in-house enterprise accounting teams. Enterprises process high volumes of complex, multinational transactions that require broad expertise in international tax and accounting.
Sell to companies like these? Paste your website and see 10 with a filed reason to buy this month. Free.
Opens in a new tab. No signup.
What it does AI Employees for In-House Enterprise Accounting (source)
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
Rational builds AI employees for in-house enterprise accounting teams. Enterprises process high volumes of complex, multinational transactions that require broad expertise in international tax and accounting. Powered by the most accurate tax model in the world, we save teams enormous time on tax and close work while also eliminating unnecessary audit costs.
Read from the page's own HTML and response headers on 10 September 2026, at https://rational.to/. Each badge matched a string the site serves about itself — hover one to see which. Nothing here is a traffic, ranking or revenue figure: those cannot be read off a page and are not claimed.
Rational lists 4 open roles on its directory entry.
Checked away from the directory entry. What is below does not come from the company's Y Combinator page.
Rational offers AI employees for AP, bookkeeping, reconciliations, document chasing, expense review, and close.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Jibril Moinuddin
Founder/CEO
CEO at Rational. Previously founding engineer at Buckeye AI, TrueFoundry. Founded STEMplicity Education. Dropped out of University of Michigan. Non-Trivial Fellow.
Christ Xu
Founder/CTO
CTO at Rational. Youngest Tencent Senior SWE, OpenAI SWE. 2x IOI Camp, IMO Camp, published algo researcher.
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
One of 155 companies held here in B2B › Operations.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
Want the whole picture on Rational?
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on Rational: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Rational covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
7 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
You get an alert in MentionFox the next time this company shows up.
Is this you?
If you're behind Rational: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. GetFoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.
