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Middleware

Middleware is a full-stack observability platform covering infrastructure, APM, logs, RUM, synthetics and browser tests, with an AI SRE agent (OpsAI) that detects and helps resolve issues.

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Introduction

Middleware is a full-stack observability platform that detects issues across infrastructure, APM and RUM and resolves them using its AI SRE agent. SREs, backend and platform engineers debug together in one place; one customer quote says it cut time spent debugging and resolving issues by nearly 90%.

Beyond core telemetry it offers synthetic checks and browser test runs, which bring testing-style checks into production. Plans run from free to pay-as-you-go to custom.

Monitoring is the last line of a testing strategy: it catches what tests, reviews and staging missed. Wire its alerts into the same place your CI failures go, and when an incident reveals a gap, add a test or a synthetic check so the same failure is caught before release next time.

Launch and background: Y Combinator’s company directory lists Middleware in its Winter 2023 batch, with the one-liner “AI-based full stack observability platform”.

Features

  1. Infra and APM: Full stack.
  2. RUM: Real user monitoring.
  3. Synthetics and browser tests: Production checks.
  4. OpsAI: AI SRE agent.
  5. Logs, metrics and traces: Unified.

Pros

  1. Free forever tier: Monthly limits on all features.
  2. Low per-GB pricing: $0.30 per GB.

Cons

  1. Usage add-ons: RUM and browser tests priced separately.
  1. Sign up for the free plan.
  2. Install the agent on a host or cluster.
  3. Add synthetic checks for key flows.

Resources:

Pricing

Middleware has a free-forever plan with access to all features under monthly limits, pay-as-you-go at $0.30 per GB of metrics, logs and traces, $1 per 1,000 RUM sessions, $1 per 5,000 synthetic checks and $10 per 1,000 browser test runs, a 14-day trial and custom plans.

  1. Teams wanting affordable all-in-one observability.

Conclusion

Middleware offers broad coverage at low per-GB prices.

Watch add-on usage for RUM and browser tests.

On CheckOps, Middleware is filed under the Production monitoring & observability stage. Related tools listed here include Datadog, New Relic, Grafana, SigNoz, Dynatrace and Sentry. Which one fits best depends mostly on your stack, your team’s size and skills, and whether you prefer to run tools yourself or pay for a managed service. This page reflects the official website, documentation and repository as they stood on 11 November 2026.

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Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Middleware side by side.