Gostly vs the alternatives

Beeceptor is a hosted, rule-authored mock service. Gostly is self-hosted and records real traffic — replayed from your library inside your perimeter. Where each one wins.

How Gostly differs from WireMock: traffic-derived libraries, structural redaction, and an AI-at-the-edge match cascade rather than hand-written stub mappings.

Compare Mockoon’s desktop, CLI, and proxy-recording workflow with Gostly’s self-hosted platform for recorded behavior, state, and controlled failures.

How Gostly differs from Postman Mock Servers: in-process replay, tenant isolation, no manual mock authoring.

Mountebank virtualizes services with hand-authored imposters and predicates on Node. Gostly records your real upstream and replays the recorded response from a self-hosted stack in your perimeter (Docker Compose). Where each one wins.

Prism mocks your OpenAPI spec. Gostly records your real upstream and replays the recorded response. Polymorphism, drift, and stateful flows where Prism falls short.

How Gostly differs from Microcks: contract-light, traffic-derived, structural security model.

How Gostly differs from Hoverfly: learning from real traffic, structural redaction, AI-only-at-the-edge match cascade.

How Gostly differs from Speedscale and proxymock: the whole product runs in your perimeter with Docker Compose, no Speedscale account, no kernel-privileged DaemonSet, and a mock miss that never falls through to the live provider.

Keploy is a genuinely open eBPF recorder that auto-generates CI test cases. Gostly serves the recording as durable, standing infrastructure from a userspace proxy — no eBPF, no kernel privileges, cross-platform — with recorded traffic and source code that never leave your host.

How Gostly differs from llmock, aimock, and VCR-style LLM cassettes: a self-hosted proxy you point your agent's provider base URL at — record real model responses and replay them deterministically, in your own perimeter, with drift detection and statechart state for multi-step tool flows.