DeadBro vs AppSignal: which fits your Rails app?
Both tools trace Rails requests and report errors. AppSignal adds a more developed incident workflow; DeadBro concentrates SQL, CPU, and allocation clues in an individual request. Compare the investigation workflow and plan limits before choosing for your app.
DeadBro vs AppSignal: the details
Compare how each product helps you diagnose one slow request and manage recurring errors. The free plans also differ in request allowance and team access.
Swipe sideways to read the full table.
| What to compare | DeadBro | AppSignal |
|---|---|---|
| Investigating a slow request | One captured request shows phase timing, SQL calls, CPU time, and allocations together | A sample trace shows nested spans across the Rails request Source ↗ |
| Working through errors | Error issues link to affected requests and stack traces | Error incidents can be assigned, given a status, and reviewed as a team Source ↗ |
| Free request allowance | 50,000 tracked requests/month | 30,000 requests/month Source ↗ |
| Free retention | 7 days | 5 days Source ↗ |
| Apps and teammates on Free | 1 app and 1 seat | Unlimited apps and users Source ↗ |
| Host metrics | Enterprise system monitor | Host monitoring in its APM toolkit Source ↗ |
| Logs | Linked application logs on Growth+ | 1 GB on Free; more logging is a paid add-on Source ↗ |
DeadBro figures are from its current plan matrix. Vendor details link to their own pricing or documentation and may change.
The error inbox is a real difference
In a September 2026 side-by-side review, AppSignal grouped recurring exceptions into incidents with status and assignment. DeadBro exposed request context, but its issue grouping was less useful for team triage. If errors are your main workflow, compare the inboxes with your own traffic.
This observation comes from one app reviewed in September 2026 with five monitoring agents installed at once. It describes the investigation workflow, not a benchmark of speed or agent overhead.
What DeadBro includes
- Rails request performance, error tracking, and N+1 detection on the Free plan, with 50,000 tracked requests per month and 7 days of retention.
- Deploy tracking and deeper request drill-down on Starter; Slack alerts and linked application logs on Growth.
- Optional plan-only EXPLAIN for slow SELECT queries on Pro and Enterprise, after a local opt-in. The agent does not run EXPLAIN ANALYZE.
- System monitoring on Enterprise. See the full plan limits and feature matrix.
Which is a better fit?
Choose DeadBro if…
You spend most of your time diagnosing individual slow Rails requests and want SQL, CPU, and allocation details beside the trace.
Choose AppSignal if…
Your team needs a fuller error triage workflow with status and assignment, or unlimited apps and users on Free.
Make the decision with a short trial
Connect one Rails app, generate normal traffic, and compare what each dashboard reveals about a slow request and a real error. Then review retention and usage limits for the plan you would actually buy.