Hoverfly vs SoapUI / ReadyAPI

Free and open source

From $829 per year (indicative, ReadyAPI Test module)

Free and open source. You pay in engineering time and CI minutes.

ReadyAPI is licensed per module — Test, Performance, Virtualization — and buying all three multiplies the cost.

Everything, self-hosted

SoapUI open source is free and covers SOAP and REST functional testing.

Emerging

SpectoLabs · since 2016

Widely used

SmartBear · since 2005

• Capture mode produces a realistic simulation from live traffic with no authoring.
• Latency injection makes it useful for performance and resilience testing too.
• Small footprint — a single Go binary.

• Unmatched SOAP, WSDL and JMS support for legacy enterprise integration work.
• ReadyAPI bundles functional, security, load and virtualisation in one product family.
• Groovy scripting escape hatch for anything the GUI cannot express.

• Smaller community and slower development than WireMock.
• Proxy configuration in complex networks takes effort.
• Captured simulations need periodic refresh.

• Dated Java desktop UI that feels heavy next to modern clients.
• Project files are XML and merge badly in version control.
• Modular licensing gets expensive fast.

Teams needing lightweight service virtualisation against real recorded traffic.

Enterprises testing SOAP services, message queues and legacy integration layers.