A number produced without questions should be treated as a bad sign. A competent team responds with a list of questions: livewire vs vue about integrations. A provider that quotes without asking anything is working from a template, and a guess will be corrected later — on your budget.
Look out for any distance between the team in the pitch and the people who will code. Ask for named engineers in the agreement, with a provision that requires notice before anyone is swapped. A team that only offers a pool of resources and web development company germany will not commit to individuals is preserving the option to staff you with whoever is free.
Insist on access to the repository from the first week. A partner that hands over code only at milestones is inviting you to trust a black box. Visible commits tell you how many people are really working far better than a slide deck. The same applies to the build and deployment setup: technology consulting company if there is no pipeline, promises about quality remain unverifiable.
Vague phrasing around intellectual property is rarely an oversight. The agreement must state in plain terms that all deliverables transfer to the client on payment. Look too at the governing law and the milestone terms: a large upfront payment with nothing due in return for weeks eliminates the only leverage you have.
Finally, look at communication. Confirm what overlap the teams will share with your timezone, who answers questions and within what time. A few hours of overlap is normally sufficient; zero overlap converts a five-minute question into a day of delay. Unclear written communication in the proposal will not improve later.