If you are looking for the best English to Russian translation provider in your place you can be guided by the following rules:
1. First of all any translation provider, whether it is a translator or a translation company, has to comply with local national or international translation services regulations and quality assurance standards.
i.e. if you address a translator you have to know if he or she has been certified or qualified to translate in your industry, or if the linguist has a sufficient experience in translating your text or document.
If you contact a Russian translation agency
you have to ask them if they comply with the internationally recognised quality assurance standards, and if they have necessary qualification and experience in your specific sector.
2. Second you have to learn if the translator or a company is eligible to translate your material.
Most of translation providers can say that they are smart and skilled to translate documents
in any field but it may be not true. You may ask them to provide samples of translations done by this particular provider. If they are proficient in your area they will provide the relevant sample of translation.
3. Third you have to learn the prices the translation contractor provides.
If you contact a freelancer the price may be lower and cheap. A single freelance translator is a perfect solution for a limited work scope. But if you have a lot of documents to translate within a limited time scale you will need a translation agency. But the price quote provided by a company can be higher due to the margin the company takes as a revenue.
If you are confident in services the hired linguist provides you can go ahead and request for translation you need. But if your project is large and requries the translation into multiple languages
then you will need a manager and a team of professional and qualified translators. Obviously, unless your company can afford to employ translation manager with translators and test everyone of them, you will need the help of a translation company.