# Underwrite vs AirDNA: Which Tool Do STR Investors Actually Need?

> AirDNA shows you what a market looks like. Underwrite tells you whether to buy. Here's the honest comparison every short-term rental investor should read before choosing tools.

Canonical: https://www.underwriteapp.com/blog/underwrite-vs-airdna


If you've researched short-term rental investing for more than 15 minutes, you've heard of AirDNA. It's the default answer to "how do I figure out what a property will earn on Airbnb?"

And AirDNA is genuinely good at that. But "what will this property earn?" is only one question — and it's not the hardest one.

The harder question is: **should I buy this property?**

That's the question Underwrite is built to answer.

---

## What AirDNA Does (and Does Well)

AirDNA is a market intelligence platform. It aggregates data from millions of Airbnb and VRBO listings to tell you:

- What properties in a given market earn on average (ADR, occupancy rate, RevPAR)
- How a specific address would likely perform relative to comps (Rentalizer)
- How demand has trended over 12–36 months
- Which submarkets within a metro are performing better or worse

For understanding a market, AirDNA is the best tool available. It has the deepest data, the longest history, and it's trusted by institutional operators and hedge funds.

**The limitation:** AirDNA is a data layer. It doesn't tell you whether the numbers justify a purchase at a specific price, with your specific financing, in your specific financial situation. That analysis is on you.

---

## What Underwrite Does Differently

Underwrite starts where AirDNA stops.

You paste a Zillow or Redfin URL. Underwrite pulls AirDNA data (among other sources), runs it through a financial model calibrated for STR-specific cost structures, and produces a complete investment package:

- **Financial model** — DCF analysis, cash-on-cash return, IRR, NOI, DSCR — built around your financing assumptions
- **Market narrative** — a written investment thesis explaining *why* the numbers look the way they do, not just what they are
- **Investor pitch deck** — formatted for lenders and LPs, with comp analysis and market context
- **Renovation scope** — cost and scope estimates for value-add work, with renders

Total time: under 15 minutes. Total cost: $79 per report.

The same package from a boutique STR consulting firm costs $2,000–$5,000 and takes 2–3 weeks.

---

## Feature Comparison

| Feature | Underwrite | AirDNA |
|---------|-----------|--------|
| Revenue / occupancy estimate | ✅ | ✅ |
| Market comp analysis | ✅ | ✅ (deeper market data) |
| 36-month demand history | Via AirDNA data | ✅ |
| Financial model (DCF, CoC, IRR) | ✅ | ❌ |
| DSCR calculation | ✅ | ❌ |
| AI investment narrative | ✅ | ❌ |
| Investor pitch deck | ✅ | ❌ |
| Renovation scope + renders | ✅ | ❌ |
| Lender-ready PDF | ✅ | ❌ |
| Submarket deep data | Partial | ✅✅ |
| Property marketplace / browsing | ❌ | ✅ |
| Free tier | Quick Screen (no card) | Rentalizer (limited) |
| Starting price | Free (Quick Screen) / $79 per report | ~$12–$299+/mo (per market) |

---

## When to Use AirDNA

AirDNA is the right tool when:

- **You're doing market research, not property-level analysis.** You want to understand occupancy trends, ADR growth, and which submarkets are heating up.
- **You're screening markets before you screen properties.** AirDNA's market-level views help you decide which cities or neighborhoods to focus on.
- **You need the deepest possible data layer.** If you're managing a large portfolio or doing institutional-grade market analysis, AirDNA's depth is hard to beat.

**Who AirDNA is best for:** Experienced operators and data-driven analysts who already know how to build a financial model. AirDNA gives you the raw material; you're expected to do the rest.

---

## When to Use Underwrite

Underwrite is the right tool when:

- **You're evaluating a specific property for purchase.** You have a Zillow or Redfin link and you need to know: does this deal pencil?
- **You need to share your analysis with someone else.** A lender, an LP, a spouse, a partner. Underwrite produces a document that looks professional, not a screenshot of a spreadsheet.
- **You're analyzing multiple deals quickly.** The 5-Pack at $299 (five full analyses at $60 each) is designed for investors who screen 5–30 deals a month and need a process that scales.
- **You want a written verdict, not just numbers.** The AI market narrative explains *why* the numbers are what they are — which markets have strong demand drivers, which have regulatory risk, which are supply-constrained.

**Who Underwrite is best for:** Active deal hunters, first-time STR investors who want conviction before committing, and portfolio builders who need lender-ready documentation at speed.

---

## Can You Use Both?

Yes — and many serious STR investors do.

A common workflow:

1. Use **AirDNA** to identify markets with strong demand fundamentals — high ADR, growing occupancy, clear demand drivers (tourism, events, gateway to national parks)
2. Find specific properties in those markets via Zillow or Redfin
3. Use **Underwrite** to run a full investment analysis on your shortlist

In this workflow, AirDNA and Underwrite aren't competitors — they're complements. AirDNA helps you find the right market. Underwrite helps you decide on the right property.

**Cost of both:** If you're paying AirDNA ~$50–$100/month for market data plus running 2–4 Underwrite analyses per month ($158–$316), your total analysis cost is $200–$400/month. That's still a fraction of what you'd pay a consulting firm for a single deal.

---

## The Honest Bottom Line

| Question | Better tool |
|---------|-------------|
| What's the ADR and occupancy in Scottsdale right now? | AirDNA |
| Should I buy this specific Scottsdale property at $750K? | Underwrite |
| I want to browse for-sale STR properties by market | AirDNA |
| I need a lender-ready package for this deal by tomorrow | Underwrite |
| I manage 20+ properties and need market-level benchmarking | AirDNA |
| I'm buying my first STR and need to understand the numbers | Underwrite |

If you're doing market research, AirDNA is invaluable.

If you're deciding whether to buy a specific property — and you want to walk into that decision (and that lender conversation) with a real financial case — that's what Underwrite is for.

**[Run a free Quick Screen on any property →](/sign-up)**

---

*Underwrite uses AirDNA data as one of several inputs in every analysis. AirDNA pricing data was last verified April 2026.*