What Claude (Anthropic) with web search answered for application performance monitoring (agencies) on 2026-09-17

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-17

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best application performance monitoring for agencies

Brands named, in the order the engine gave

1. Sentry recommended
   Sentry - My default recommendation for most dev/web agencies.
2. Datadog compared
   (Sentry vs Datadog vs New Relic comparison (https://www.index.dev/skill-vs-skill/sentry-vs-datadog-vs-new-relic), Better Stack: Sentry alternatives (https://betterstack.com/community/comparisons/sentry-alternatives/))
3. New Relic compared
   (Sentry vs Datadog vs New Relic comparison (https://www.index.dev/skill-vs-skill/sentry-vs-datadog-vs-new-relic), Better Stack: Sentry alternatives (https://betterstack.com/community/comparisons/sentry-alternatives/))
4. Better Stack compared
   (Sentry vs Datadog vs New Relic comparison (https://www.index.dev/skill-vs-skill/sentry-vs-datadog-vs-new-relic), Better Stack: Sentry alternatives (https://betterstack.com/community/comparisons/sentry-alternatives/))
5. Grafana Cloud mentioned
   Grafana Cloud - Best answer if you want one pane of glass across heterogeneous client stacks.
6. Raygun compared
   (Better Stack: Raygun alternatives (https://betterstack.com/community/comparisons/raygun-alternative/))
7. Checkly mentioned
   Checkly - Not APM, but pair it with any of the above.
8. Tracefox mentioned
   Tracefox - Niche, but it's one of the few tools built explicitly for the agency use case: white-label monitoring with branded PDF reports and shareable status pages per client.
9. Dynatrace mentioned
   Who I'd skip: Datadog and Dynatrace.
10. WordPress mentioned
    You'd be paying enterprise observability prices to monitor forty WordPress and Rails sites.

Sources the engine cited

The answer, as recorded

The agency constraint that matters most: you're running many small apps rather than one big one, you need per-client separation (for isolation, reporting, and rebilling), and per-host pricing will kill you. Here's what I'd actually reach for, in order: **1. Sentry** - My default recommendation for most dev/web agencies. It's organized around *projects*, so each client gets its own project with its own alerts, members, and quota, and Sentry's own client-side view rolls up cleanly. Errors + tracing + session replay in one tool, and the event-based pricing means a dormant client site costs you almost nothing. The catch worth planning for: pricing scales with event volume, so a bad release throwing millions of errors gets expensive fast - set per-project rate limits and trace sampling on day one. ([Sentry vs Datadog vs New Relic comparison](https://www.index.dev/skill-vs-skill/sentry-vs-datadog-vs-new-relic), [Better Stack: Sentry alternatives](https://betterstack.com/community/comparisons/sentry-alternatives/)) **2. Grafana Cloud** - Best answer if you want one pane of glass across heterogeneous client stacks. It aggregates telemetry from many sources and databases, which is exactly the agency problem, and its free tier plus usage-based pricing is friendly to a long tail of small clients. Org/folder structure gives you per-client separation, and dashboards are genuinely presentable to clients. More assembly required than Sentry. ([Hud: top application monitoring tools](https://www.hud.io/blog/top-application-monitoring-tools/)) **3. New Relic** - The one I'd pick if you want real full-stack APM (distributed tracing, database breakdowns, infra) without Datadog money. Free tier is 100GB/month, then roughly $0.30-0.50/GB, and it's per-user rather than per-host - which is the right shape for an agency where you have 8 engineers and 40 client servers. Reported real-world gap is meaningful: ~$800-1,500/mo on New Relic vs ~$3,000-8,000/mo on Datadog for a comparable 20-host setup. Downside is the per-user seat cost if you want every client-facing PM in there. ([MonitoringCost APM pricing comparison](https://monitoringcost.com/apm-pricing-comparison), [CloudZero: Datadog vs New Relic](https://www.cloudzero.com/blog/datadog-vs-new-relic/)) **4. Better Stack** - Best value if your actual need is "know when a client site breaks and show them a status page," not deep tracing. Free tier covers 100k exceptions, 10 monitors, and a status page; paid starts ~$29/mo per responder with unlimited team members - so you can add account managers for free. Cheapest at high event volume, and the bundled uptime + incident + status page combo covers a lot of agency ground in one bill. ([Better Stack: Raygun alternatives](https://betterstack.com/community/comparisons/raygun-alternative/)) **5. Checkly** - Not APM, but pair it with any of the above. Synthetic monitoring as code lets you write a checkout-flow or login-flow test per client and run it from multiple regions. For agencies this is the thing that catches "the contact form has been silently broken for three weeks," which no error tracker will tell you. **6. Raygun** - Worth a look specifically if you're a .NET shop or your client work is heavily mobile. Errors + RUM + APM bundled in one product, and its deploy tracking correlating error spikes to releases is genuinely good for rollback decisions. Generally pricier than Sentry with a smaller ecosystem. ([TrackJS: Sentry vs Raygun](https://trackjs.com/compare/sentry-vs-raygun/)) **7. Tracefox** - Niche, but it's one of the few tools built explicitly for the agency use case: white-label monitoring with branded PDF reports and shareable status pages per client. If "the monthly report has our logo on it, not a vendor's" is a real requirement for you, this solves it directly. Shallow compared to the others on actual performance data. ([Tracefox white-label monitoring](https://tracefox.co/white-label-monitoring)) **Who I'd skip:** Datadog and Dynatrace. Both are excellent, but their per-host economics are built for one company with a lot of hosts, not one company with a lot of *clients* - a 100-host full-stack Datadog deployment routinely lands at $200-300k/year. You'd be paying enterprise observability prices to monitor forty WordPress and Rails sites. **If you want one sentence:** Sentry for the errors and traces, Checkly for the critical user flows, and a Better Stack status page you can hand to clients - that stack covers 90% of agency needs for a few hundred dollars a month, and you graduate to New Relic or Grafana Cloud only when a specific client's app gets complex enough to need real distributed tracing. Sources: - [Sentry vs Datadog vs New Relic: Error Monitoring & APM Comparison 2026](https://www.index.dev/skill-vs-skill/sentry-vs-datadog-vs-new-relic) - [13 Best Sentry Alternatives in 2026 - Better Stack](https://betterstack.com/community/comparisons/sentry-alternatives/) - [Top 12 Raygun Alternatives 2026 - Better Stack](https://betterstack.com/community/comparisons/raygun-alternative/) - [APM Pricing 2026: Datadog vs New Relic vs Dynatrace vs AppDynamics](https://monitoringcost.com/apm-pricing-comparison) - [Datadog vs. New Relic: A 2026 Comparison Guide - CloudZero](https://www.cloudzero.com/blog/datadog-vs-new-relic/) - [Top 12 Application Performance Monitoring Tools for 2026 - Hud](https://www.hud.io/blog/top-application-monitoring-tools/) - [Sentry vs Raygun - TrackJS](https://trackjs.com/compare/sentry-vs-raygun/) - [White-Label Website Monitoring for Agencies - Tracefox](https://tracefox.co/white-label-monitoring)

Markdown edition · the question page, with every recording · Answer Watch · AEO Watch

Answer Watch records what one AI answer engine said on one date, nothing more. Each page names the engine and the model, carries the date the question was asked, and lists the brands that appeared in the answer in the order the engine gave them, with the sources it cited. It is a measurement, not a ranking, not a recommendation and not a claim about the world. Brands that did not appear in an answer are not named on any public page. Coverage: Claude (Anthropic) with web search. Other engines not included.