Problem

Subtrace addresses the gap between high-level backend monitoring and the request-level detail engineers need to debug production systems. The company says tools such as Sentry and OpenTelemetry can omit crucial request information, forcing developers to search through disconnected logs to identify root causes. That creates an expensive operational problem: revenue-critical incidents can remain unresolved for months, engineers may spend hours tracing customer requests across servers, and teams risk prolonged outages or slow responses to customers. The killer use case is an API error, latency spike, or upstream-service outage where an engineer needs to identify the exact request, inspect its payload and response, and determine what failed.

The Trieve case study illustrates the economics of this pain. Trieve says its engineers previously struggled to answer basic questions about which tenant, route, query, or response was involved, but used Subtrace to trace a latency spike to a bad Postgres query and resolve incidents in minutes rather than months. In one outage, they found a failed Kubernetes pod through the customer's exact request and verified the fix immediately, replacing log-sifting and guesswork with a fast, concrete debugging workflow.

Product / Service

Subtrace is a zero-code network tracer and backend network inspector. A developer starts a process with the Subtrace command-line tool, and its BPF-based instrumentation captures incoming and outgoing HTTP requests without code changes or root privileges. Requests appear in real time in a Chrome DevTools-like dashboard, where engineers can inspect status, headers, payloads, latency, and related request details. The documented setup takes one command, with language-specific integrations for environments including Node.js, Python/FastAPI, Go, Java, PHP, Rust, and Ruby.

The product combines search and filtering with request inspection, latency analysis, record-and-replay, and collaboration. Engineers can search across production traffic, examine individual requests and timing breakdowns, copy or replay a production request locally with its headers and body intact, and share findings with teammates. It is delivered through a free-to-start dashboard and CLI workflow, with paid Team, Scale, and Enterprise plans; public pricing lists $25 per month for Team and $599 per month for Scale, while commercial customers receive a 14-day trial.

Market

Subtrace competes in backend observability, network request inspection, and distributed-tracing infrastructure. Its positioning is narrower and more request-centric than a conventional monitoring suite: rather than relying primarily on sanitized aggregates or requiring application-level instrumentation, it aims to expose every backend request and its full context with minimal setup. The competitive set therefore includes Sentry and OpenTelemetry as incumbent approaches cited by Subtrace, as well as broader observability and tracing platforms such as Datadog and Honeycomb, which industry-company data identifies among Subtrace's top competitors.

The company is not merely pre-product: it was founded in 2024, is listed as an active San Francisco company in Y Combinator's Winter 2025 batch, and its open-source GitHub repository had 2,804 stars and 390 commits in the retrieved record. Trieve is a named production customer whose engineers use Subtrace daily, and Trieve reports reducing resolution time for revenue-critical incidents from months to minutes; Subtrace also says other YC companies use it in production. Its free tier and published commercial plans show an active monetization path, although the available evidence does not disclose revenue, paid-customer count, or profitability, so traction is best characterized as early but validated rather than demonstrably scaled.