Noise Monitoring
Party Squasher
Occupancy-counting sensor that catches parties before they start
Solid Option
Best-in-class party prevention for detached homes, useless everywhere else
From $17/listing • No free trial
Comparison
Party Squasher vs Alertify
Pricing, pros and cons, and buyer-fit side-by-side. Pick the one that matches your operation — or see why neither should.
Noise Monitoring
Alertify
All-in-one indoor sensor for noise, smoking, and air quality monitoring
Best Value
Best-value indoor STR sensor when hardware-included annual pricing fits your portfolio
From $145 • No free trial
✓Editorial verdict
Which Should You Pick: Party Squasher or Alertify?
Pick Alertify if you need a single indoor sensor covering noise, smoking, and climate across any property type at a flat $145/year with hardware included. Pick Party Squasher if your entire portfolio is detached homes and you want proactive occupancy-based party prevention before noise even starts.
Editorial perspective from the Alertify side; factual claims about Party Squasher are drawn from its review.
Pricing Side-by-Side
Party Squasher
Full pricing →From $17/listing • No free trial
Standard (1–9 sensors)
$249 year 1, $199/yr renewal (~$17/mo)
1–9 sensors (one per property)
Booking fee: None
- Occupancy-counting hardware sensor
- Mobile alerts when threshold exceeded
- Tamper/disconnect notifications
- 180-day money-back guarantee
Standard (10–99 sensors)
$199 year 1, $168/yr renewal (~$14/mo)
10–99 sensors
Booking fee: None
- Everything in Standard 1–9
- Volume pricing
Pro (1–9 sensors)
$309 year 1, $252/yr renewal (~$21/mo)
1–9 sensors
Booking fee: None
- Everything in Standard
- Web dashboard
- API access
Pro (10–99 sensors)
$249 year 1, $216/yr renewal (~$18/mo)
10–99 sensors
Booking fee: None
- Everything in Pro 1–9
- Volume pricing
Alertify
Full pricing →From $145 • No free trial
Alertify
$145/year
- Alertify Device with Backup Battery
- Noise, smoking, temperature & humidity monitoring
- PMS integrations and automated guest messaging
Alertify AQI+
$195/year
- All standard Alertify features
- Extensive air quality monitoring
- CO2 monitoring and management dashboard
What each tool does well — and where it falls short
What Party Squasher does well
Detects parties before they escalate — occupancy, not noise
The sensor counts mobile devices every 20 seconds and alerts when occupancy exceeds a threshold. This catches large gatherings before noise complaints or property damage, which reactive noise monitors cannot do.
Privacy-first — no microphones, cameras, or personal data collected
The sensor detects device presence without recording audio or video and does not collect, store, or track personal phone numbers. It is GDPR-compliant.
Zero-maintenance, tamper-resistant hardware with whole-property coverage
The 2.3″ sensor can be placed in a locked closet and still covers the entire home including yards. If disconnected, the owner is notified within 15 minutes. Runs on USB power — no batteries.
What Alertify does well
All-in-one indoor sensor with hardware included in the subscription
The annual fee bundles the Alertify Device rather than billing hardware separately. Vendor copy notes that 'Average Smoking Damage costs are 250% of the cost of an Alertify Device,' framing the device as cheap relative to a single incident.
Strong third-party review consensus on accuracy and alerting
Independent STR review sites consistently rank Alertify near the top for indoor monitoring. Summer calls out a 'robust alert system with immediate notifications,' and Turno highlights its precise noise measurement.
Broad PMS integration list with automated guest messaging
The integrations page names 10+ PMSs including Hostaway, Guesty, Hospitable, Lodgify, OwnerRez, Mews, and Hostfully, plus Slack and webhooks — letting hosts automate the guest nudge when an incident fires.
Where Party Squasher falls short
Only works reliably for detached homes
The sensor detects all mobile devices in range, including neighbors' phones. In multi-unit or shared-wall properties, false positives make it unreliable. This is a hard architectural limitation, not a configuration issue.
Counts devices, not people — can overcount or undercount
A guest with multiple devices inflates the count; a guest in airplane mode is invisible. Coordinated evasion is unlikely at party scale, but individual miscounts are inherent to the approach.
Occupancy-only — does not monitor noise, smoke, or other risks
Party Squasher addresses only one dimension of property protection. Operators still need separate solutions for noise, smoke/vape detection, or environmental hazards.
Where Alertify falls short
No outdoor sensor option
Summer's review is explicit: if guests sneak parties onto a patio or in a backyard, Alertify won't catch it. Hosts whose noise risk lives outside should look elsewhere or layer a second product.
Annual-only billing forces a 12-month commitment
Both visible tiers on the pricing page are 'Billed Annually' with no month-to-month plan surfaced, which makes piloting a single device on a short trial harder than with subscription competitors.
Enterprise pricing above 25 properties is opaque
The pricing page explicitly punts portfolios above 25 properties to 'Contact our sales team' without publishing a discounted per-unit rate, so larger operators can't self-serve a quote.
Which Should You Pick
Pick Party Squasher if
Operators managing detached-home portfolios (any size) who want to prevent unauthorized parties proactively via occupancy counting rather than reactive noise monitoring.
Skip Party Squasher if
You manage condos, townhouses, apartments, or any multi-unit / shared-wall properties — the sensor cannot distinguish your unit's occupants from neighbors' devices.
Pick Alertify if
STR hosts and small portfolios under 25 indoor units who want noise, smoking, climate, and (optionally) air-quality monitoring in one device at a flat annual rate with hardware bundled.
Skip Alertify if
Your main concern is outdoor patio or hot-tub noise, or you're looking for a property management platform rather than a hardware-led sensor.
Where Party Squasher and Alertify actually differ
- Alertify monitors noise levels, cigarette smoke, and temperature/humidity (plus CO2 and air quality on the AQI+ tier), while Party Squasher exclusively tracks occupancy by counting mobile devices every 20 seconds.
- Alertify works in any property type including shared-wall units; Party Squasher is designed only for detached, standalone homes and produces unreliable readings in multi-unit buildings.
- Alertify bundles hardware into its $145/year subscription with no separate device purchase, whereas Party Squasher charges $249 in year one (hardware + subscription) dropping to $199/year on renewal.
- Alertify offers 10+ PMS integrations with an open API, Slack, and webhooks on every plan; Party Squasher restricts its web dashboard and API access to the higher-priced Pro tier.
- Party Squasher detects large gatherings proactively before noise or damage occurs, while Alertify alerts reactively once noise or smoking thresholds are breached.
Common objections
- Party Squasher catches parties before they get loud — doesn't that make it better than Alertify?
- It depends on what you're protecting against. If your main risk is unauthorized parties at detached vacation homes, occupancy counting is genuinely proactive. But if you also need to catch smoking, monitor air quality, or operate in condos and townhomes, Alertify covers those scenarios and Party Squasher simply cannot.
- Is Alertify really cheaper, or does it just look that way?
- At list pricing, Alertify's $145/year all-in is less than Party Squasher's $199/year renewal rate, and there is no separate hardware charge. Party Squasher's volume discounts narrow the gap at 10+ sensors, but Alertify still comes in lower per unit on published rates.
- Can I use both together to get noise monitoring and occupancy counting?
- Yes — the two sensors measure different things and operate independently. Some operators pair an occupancy counter with a noise/smoke sensor for layered coverage, though that doubles your per-property device cost.
Keep Digging
Party Squasher
Best-in-class party prevention for detached homes, useless everywhere else
Alertify
Best-value indoor STR sensor when hardware-included annual pricing fits your portfolio