Excel Technical Review with AI
Let AI do the first pass of your Excel workbooks. Triple-check formulas, references, and catch errors before they cost you.
How it worksFound 3 issues across 6 sheets:
| Severity | Location | Issue |
|---|---|---|
| 🔴 Error | Projections!B3 | #REF! error — deleted reference |
| 🟡 Warning | Revenue!B7 | =SUM(B2:B4) excludes B5 |
Security your firm can stand behind
Your models hold sensitive, material information. TieOut is fully encrypted, pursuing an independent SOC 2 Type II audit, and puts you in control — delete your data whenever you want, for any reason.
SOC 2 Type II in progress
We're actively completing a SOC 2 Type II audit with an independent firm, holding TieOut to the same control standards enterprise security and compliance teams require.
Fully encrypted, always
Every upload, analysis, and report is encrypted in transit with TLS and at rest with AES-256 — there is no unencrypted path your data ever takes through our systems.
Delete your data anytime
You're always in control. Permanently delete any workbook, analysis, or report the moment you want to — on your schedule, no questions asked.
TLS in transit · AES-256 at rest · Per-customer isolation · Least-privilege access · Retention & deletion controls · SOC 2 Type II audit in progress with an independent firm. See our Privacy Policy for details.
Six checks across every cell
The toolkit scans your entire workbook automatically. AI then reviews every finding so you only see what actually matters.
Error Values
Catches #REF!, #DIV/0!, #NAME?, and other error values hiding in your formulas.
Circular References
Maps cell dependencies and detects circular chains that produce unreliable results.
SUM Range Gaps
Flags SUM formulas that skip adjacent data rows — the classic "new row not included" mistake.
Broken Propagation
Spots formulas that break the pattern of their neighbors, like a growth rate that suddenly changes.
Cross-Sheet Anomalies
Checks every cross-sheet reference to make sure it points to a cell that actually has data.
Hard-Coded Values
Finds literal numbers embedded in formula-heavy regions where a formula is expected.
More than a spreadsheet in an AI chat box
TieOut analyzes the workbook's native structure and formulas first. AI receives a compact workbook map, ranked technical signals, and exact evidence—so its judgment is focused on financial-model risk rather than a generic summary of uploaded data.
Securely ingest the Excel workbook
The .xlsx file is uploaded to private storage and opened in an isolated analysis environment sized to the workbook. Review is read-only; TieOut does not edit the source file.
Build a workbook-wide model
TieOut reads every populated cell in one pass and maps sheets, hidden states, formulas, labels, time periods, number formats, input formatting, common functions, and cross-sheet relationships.
Run specialized Excel integrity checks
A deterministic toolkit tests for formula errors, circular references, incomplete SUM ranges, formula pattern breaks, overwritten formulas, cross-sheet anomalies, suspicious hardcodes, inconsistent formats or labels, external links, hidden-sheet dependencies, and approximate VLOOKUPs.
Consolidate noise into review priorities
Repeated signals are grouped into likely root causes, scored by severity and risk, and ranked. This prevents hundreds of related cell flags from overwhelming the review.
Plan the financial-model review
Using the workbook map, TieOut identifies the apparent model type, purpose, key sheets, outputs, and priority areas — such as statement ties, roll-forwards, valuation bridges, debt and returns, ownership, or forecast logic.
Inspect the evidence behind each priority
TieOut reads targeted ranges, compares formula series, examines neighboring cells and formatting, and traces precedents. The full scan remains workbook-wide; focused evidence keeps the judgment stage faster and more cost-efficient.
Verify findings and present the report
The reviewer confirms, combines, downgrades, or dismisses signals based on workbook context. Every reported issue must tie back to an actual cell or range, then appears as an Error, Warning, or Review item with a location, explanation, and recommended action.
Simple, honest pricing
Try TieOut free — no credit card required. Upgrade only when you're ready.
No credit card required to tryFree to try, no card needed
Cancel anytime. No long-term contracts.
- Full access to every check
- 500 credits/mo (~250 workbooks)
- PDF reports & drill-down findings
- Cancel anytime
Trusted by finance professionals
From real estate to actuarial analysis, teams rely on TieOut for a faster, more disciplined first pass on their models.
TieOut gives finance teams a fast first pass on the workbook so they can catch those issues before they become real problems. For accountants relying on Excel to make decisions, this is exactly the kind of tool that makes the review process faster, cleaner, and safer.
Trevor McCandless
CEO, Fusion Taxes
TieOut's value is purpose-built for the financial model review process. It gives finance teams a focused second set of eyes on Excel workbooks and helps create more confidence before a model is shared, relied on, or used in a transaction.
Charlie M.
Investor
In financial models, the biggest risks are often not obvious. They are buried in skipped rows, broken formulas, hardcodes, inconsistent references, and small issues that can completely change the output. At 7Alder, we review models for transactions, valuations, diligence, and operating decisions. The work requires judgment, but it also requires discipline. Before a model goes to a client, investor, lender, or board, someone needs to know the workbook has been technically reviewed. TieOut was built to make that first-pass review faster, more consistent, and more reliable. It is not meant to replace the analyst. It is meant to give finance teams a better QA layer so they can catch errors earlier, focus on the issues that matter, and have more confidence in the work they are sending out.
Wil Dublin
Managing Partner, Black Loch Capital
The strongest products are the ones that solve a specific, painful problem for a specific audience. TieOut does that by taking a process every analyst, consultant, and deal team understands; manually reviewing Excel models for errors, and turning it into a cleaner, faster, more repeatable workflow.
John Maher
Founding Partner, Victoriam Group
TieOut helps turn model review into a more systematic workflow and gives teams more confidence before sharing or relying on the output.
Stuart Green
What I like about TieOut is that it is not trying to be a generic AI tool. It is focused on technical review, which is where accuracy and clarity matter most. In financial models, the issue is often not the overall structure, it's a small formula break, a hardcode, a missed check, or an inconsistency that can change the output. TieOut gives teams a more efficient first pass and helps reviewers focus their time on the issues that matter. For anyone building or reviewing Excel models, it is a practical way to improve quality control and reduce the risk of missed errors.
Amber Petrak
Actuarial Analyst
Catch errors before they cost you
Manual reviews take hours and still miss things. Let AI do the first pass so you can focus on what matters.