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Hoverfly

hoverfly.io

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Spec score 8.5 #6 of 26 in API Mocking Tools

What it is

Hoverfly Cloud is a hosted API simulation and mocking platform for testing without live API dependencies. It handles HTTP/S services including REST, SOAP, XML, JSON, and GraphQL. Users can capture and replay traffic, generate simulations from OpenAPI specifications, and match requests by methods, headers, parameters, and bodies. Simulations can delay responses, inject faults or errors, and modify replies. A command-line interface supports scripted configuration and testing pipelines. Hoverfly and hoverctl binaries run on macOS, Linux, and Windows, while documentation covers Docker and Kubernetes installation. The underlying Hoverfly framework is open source under Apache 2, has no GUI, and is generally run locally or in a user’s infrastructure. Cloud use cases include performance testing, functional testing, and development.

Spec sheet

Purpose
Hoverfly Cloud is a hosted API simulation and mocking platform for testing without relying on live API dependencies.Read 3 Oct 2026 · hoverfly.io
Support
iOCO offers Hoverfly Cloud team support by email and support portal with a guaranteed response within one business day during 9am–6pm GMT.Read 3 Oct 2026 · hoverfly.io
License
The open-source Hoverfly framework is distributed under the Apache 2 license.Read 3 Oct 2026 · hoverfly.io
API access
The open-source framework provides a REST API and CLI, with native language bindings for Java and Python.Read 3 Oct 2026 · hoverfly.io
Dynamic behavior
Hoverfly Cloud can delay responses, inject faults or errors, and modify responses while simulating requests.Read 3 Oct 2026 · hoverfly.io
Open source
The underlying Hoverfly framework is open source, has no GUI, and is typically used locally or in a user's own network and infrastructure.Read 3 Oct 2026 · hoverfly.io
Pipeline integration
Hoverfly Cloud provides a CLI for scripted configuration and integration into testing processes.Read 3 Oct 2026 · hoverfly.io
Protocols
Hoverfly Cloud supports HTTP/S services including REST, SOAP, XML, JSON, and GraphQL.Read 3 Oct 2026 · hoverfly.io
Scale
The pricing page lists Enterprise capacity of up to 2,000 requests per second per instance and load-balanced instance clusters.Read 3 Oct 2026 · hoverfly.io
Security and privacy
The privacy policy says iOCO uses technical controls to protect personal details and does not share them with third parties for marketing; it does not state a named security certification.Read 3 Oct 2026 · hoverfly.io
Simulation features
Users can capture and replay API traffic, generate simulations from OpenAPI specifications, and match requests by methods, headers, parameters, and bodies.Read 3 Oct 2026 · hoverfly.io
Supported systems
Hoverfly and hoverctl binaries are available for macOS, Linux, and Windows, and the documentation describes Docker and Kubernetes installation.Read 3 Oct 2026 · docs.hoverfly.io
Use cases
The maker describes performance testing, functional testing, and development as primary use cases for Hoverfly Cloud.Read 3 Oct 2026 · hoverfly.io

Plans and prices

Developer $10 a month 2 API simulation instances · 20 requests per second per instance · 14 day free trial · no credit card required Read 3 Oct 2026 · hoverfly.io
Professional $30 a month 5 API simulation instances · simulates latency and random failures · 14 day free trial Read 3 Oct 2026 · hoverfly.io
Enterprise Priced on request Fully customisable · unlimited API simulation instances · up to 2,000 requests per second per instance · load-balanced instance clusters · dedicated account manager Read 3 Oct 2026 · hoverfly.io

Every Hoverfly plan and price →

Strong points and limits

Strong points

  • Supports REST, SOAP, XML, JSON, and GraphQL
  • Captures and replays API traffic
  • Generates simulations from OpenAPI specifications
  • Provides CLI, Docker, and Kubernetes options
  • Developer includes a 14-day no-card trial

Limits

  • No free plan
  • Open-source framework has no GUI
  • Developer allows two simulation instances

Who it suits

It suits development and testing teams that need simulated HTTP/S services, scripted setup, or controlled failure behavior. The open-source framework also suits users running locally or in their own infrastructure.

Verdict

Hoverfly Cloud provides API mocking, traffic capture, request matching, and controllable response behavior across common protocols. Its cloud tiers add capacity and support, while the open-source framework offers local operation without a graphical interface.

Where Specifiction places it

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