First list down top 10 companies as per your research (could be based on Google search, testimonials, past records, reviews or even commercials)

Once the list is ready, a detail research can start. Before this the requirements should be clear and a plain English requirement document should be prepared.

Share it with the short listed companies and ask them to make plans for development.

Most often cases 3rd party companies struggle to understand the requirements and as a result the put their efforts in wrong/incomplete requirements. This is how a bundle of change request raises at the time of delivery.

So the main and perhaps the most crucial judgement point becomes the clarity of the requirement. More clear the requirement - best development plan and comprehensive commercials can be achieved.

Once this is done, next important factor is flexibility in the contract. This is important to cater any change request, delivery delays, add on requirements.

Third important factor is the team that the thid party is engaging - all the player Project Manager, Tech lead, developers and testers plays a key role in delivering the right product within expected timeline.

Last but not the least, post delivery support plan should be included along with the hand over/warranty terms.

For more details/guidance please schedule a call with me.

Regards,
Krish