Situations
The right criteria depend on why you are buying. Each situation changes the weights in the framework explicitly and changes the order in which the tools help.
First vendor for a startup
A small product team hires outside testing for the first time. Speed to start and a team that works inside your tools matter more than process maturity; clear pricing and a clean exit protect a small budget.
Replacing an underperforming vendor
An existing vendor is not delivering. The new selection is shaped by what went wrong: who owns the test code, how knowledge moves across, whether the new team stays stable, and whether reporting shows problems early.
Regulated product
Health, finance, public sector or other regulated software. Evidence matters: security certifications with the right scope, controlled handling of test data, and test documentation an auditor can follow.
Automation build-out
You are paying a vendor to build an automated test suite. The suite has to live in your repository, run in your pipeline, and stay maintainable by your own engineers after the vendor leaves.
Manual and exploratory coverage
You need people who find the bugs scripts miss. Tester seniority, knowledge of your domain, clear communication and fast turnaround on each build decide the value.
Agency looking for a QA partner
A digital agency needs testing capacity it can resell or embed in client projects. The partner must work under your name, flex with your project pipeline, price per project and commit to service levels you can pass on.
Enterprise procurement
A formal procurement with vendor risk management, legal review and security review. Insurance, subcontracting control, service levels with remedies and audit rights carry as much weight as delivery.
Nearshore versus offshore
You are choosing where the testing team sits. Working-hour overlap, the legal jurisdiction of the contracting entity, rules on moving data across borders and the real total rate decide the trade-off.