What should I email for a Deal Review question?

Email dealreview@getcapitalstack.com with the property address, purchase price, rehab estimate, expected rent, and financing type. If you already use Capital$tack, screenshots help.

Do you build custom spreadsheets and calculators?

Yes. We build lender-style Google Sheets calculators, underwriting tools, dashboards, and automation to fit your exact workflow.

Can you help turn a spreadsheet into an app?

Yes. We can build lightweight web app prototypes and tools based on spreadsheet logic so your workflow is easier to use and share.

Capital Stack contact page for underwriting tools and custom builds

Contact Capital$tack

Questions about the tool? Deal review help? Or you want something custom built?
We’re for hire to build lender-style spreadsheets, calculators, and lightweight apps.

Email us anytime at dealreview@getcapitalstack.com or use the form below.

✅ Email Us Contact form ↓ View the Tool →

Support + Questions

Tool help, licensing questions, access issues, and general support.

Custom Spreadsheet Builds

Underwriting calculators, dashboards, deal filters, lender-style outputs, automation.

Spreadsheet → App

Want your spreadsheet logic turned into a clean app experience? We can build it.

Response time: typically within 24–48 hours (email-based).

Reminder: We do lender math, not magic. We never guarantee approvals or profits.

What we build (for hire)

If you have a workflow in your head and it lives in a messy spreadsheet right now, we can turn it into something clean, fast, and usable.
Google Sheets builds are the quickest way to ship. Apps are how you scale it.

Custom underwriting spreadsheets (BRRRR, DSCR, flips, rentals)
Max Offer logic + negotiation math
Dashboards, scenario presets, stress-tests, lender-style outputs
Automation (Google Sheets + Apps Script workflows)
Lightweight web app prototypes based on your spreadsheet logic
Productized tools you can sell (we can build it with you)

Best if you want speed

You want a custom spreadsheet built fast so you can use it immediately and refine over time.

Google Sheets build
Automation + guardrails
Clean outputs + readable results

Best if you want scale

You want your logic turned into an app so it’s easy to use, share, and monetize.

App prototype
Simple UI (no prompt gymnastics)
Clear workflow and outputs

Email: dealreview@getcapitalstack.com (include what you’re trying to build + any examples you have).

Send a message (contact form)

Tell us what you’re trying to do, what you’ve got now, and what “done” looks like. If it’s about a deal review, include the property address and numbers.

FAQ

What should I include if I want a custom spreadsheet built?

Tell us the goal, the inputs you want, and what outputs you need. If you already have an example sheet, attach screenshots or share a link.

Can you help us build a tool we can sell?

Yes. We can help turn your spreadsheet idea into a clean product workflow, then evolve it into an app prototype when you’re ready.

Is this a guarantee of approval or profit?

No. We do lender math, not magic. We don’t guarantee approvals or profits. We help you underwrite conservatively and build tools that run on real numbers.

What’s the best email to contact you?

Email dealreview@getcapitalstack.com for everything right now (support, deal review questions, and custom build inquiries).

✅ Ready to build something?

If you’re serious about shipping a tool that doesn’t break under lender math, reach out.
Email: dealreview@getcapitalstack.com

✅ Email Us View the Tool →

Disclaimer: We do lender math, not magic. No approvals or profits guaranteed. Conservative numbers only.