True cost comparison — not just what the pricing page says
Quick Verdict
Datadog saves you 100%
Best for Xero
Cloud monitoring and observability platform. Free for 5 hosts, then per-host pricing from $15-$23/ho
Best for Datadog
Cloud accounting software popular internationally. Plans from $29-$70/mo, but multi-currency, payrol
Cloud accounting software popular internationally. Plans from $29-$70/mo, but mu...
Advertised
$29
/month
True Cost
$133
/month (typical)
Invoice & Bill Limits on Starter
Starter ($29/mo) limits to 20 invoices and 5 bills per month. Any real business exceeds this, forcin...
Payroll Add-On (US)
Gusto payroll integration costs $40/mo + $6/person extra. Xero's native payroll (AU/UK/NZ) is includ...
Multi-Currency Requires Standard+
Multi-currency support requires Standard ($52/mo) or Premium ($70/mo). Starter plan is single-curren...
Cloud monitoring and observability platform. Free for 5 hosts, then per-host pri...
Advertised
$0
/month
True Cost
$505
/month (typical)
Log Management Per-GB Ingestion
Log management costs $0.10/GB ingested per month. A mid-size app generating 500GB/mo of logs = $50/m...
APM Per-Host Add-On
Application Performance Monitoring is a separate product at $31/host/mo (APM) or $35/host/mo (APM + ...
Custom Metrics Overage
Each plan includes 100 custom metrics. Additional custom metrics cost $0.05/metric/mo. Apps with det...
Datadog advertises $0/mo. Xero advertises $29/mo.
Datadog has 3 documented hidden fees. Xero has 3.
Datadog confidence: 75%. Xero confidence: 77%.
| Metric | Xero | Datadog | Winner |
|---|---|---|---|
| Advertised Price | $29/mo | $0/mo | Datadog |
| True Monthly Cost | $133/mo | $505/mo | Xero |
| Hidden Fee Total | +$104/mo | +$505/mo | Xero |
| # Hidden Fees | 3 | 3 | Xero |
| Confidence Score | 77% | 75% | Xero |
| Pricing Tiers | 3 | 3 | — |
| Affiliate Program | None | None | — |
Xero advertises $29/mo and Datadog advertises $0/mo. However, when you include hidden fees, Xero has 3 documented hidden fees adding +$104/mo, while Datadog has 3 hidden fees adding +$505/mo. Based on true cost, Datadog is typically 100% cheaper.
Xero has 3 documented hidden fees: Invoice & Bill Limits on Starter, Payroll Add-On (US), Multi-Currency Requires Standard+. These add approximately +$104/mo on top of the $29/mo advertised price.
Datadog has 3 documented hidden fees: Log Management Per-GB Ingestion, APM Per-Host Add-On, Custom Metrics Overage. These add approximately +$505/mo on top of the $0/mo advertised price.
Choose Xero if: Cloud monitoring and observability platform. Free for 5 hosts, then per-host pricing from $15-$23/ho. Choose Datadog if: Cloud accounting software popular internationally. Plans from $29-$70/mo, but multi-currency, payrol. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. Xero data has a 77% confidence score and Datadog has 75%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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