After you have been dealing for some time with SEO on your own, you discover that no matter how hard you try, your site does not rank well or that your site ranks well but optimizing it for search engines takes all your time and all your other tasks lag behind. If this is the case with you, maybe it is better to consider hiring a SEO company to do the work for you. With so many SEO companies out there, you can't complain that you have no choice. Or is it just the opposite – so many companies but few reliable?

It is stretching the truth to say that there are no reliable SEO companies. Yes, there might be many scam SEO companies but if you know what to look for when selecting a SEO company, the risk of hiring fraudsters is reduced. It is much better if you yourself have a substantial knowledge of SEO and can easily decide if they promise you the starts in the sky or their goals are realistic but even if you are not quite familiar with SEO practices, here is a list with some points to watch for when choosing a SEO company:

Do they promise to guarantee #1 ranking? If they do, you have a serious reason to doubt their competencies. As the Google SEO selection tips say, no one can guarantee a #1 ranking in Google. This is true even for not so competitive words.

Get recommendation from friends, business partners, etc. Word of mouth is very important for the credibility of a company.

Ask in forums. There are many reputable Web master forums, so if you can't find somebody who can recommend you a SEO company right away, consider asking in Web master forums. However, beware that not all forum posters are honest people, so take their opinion (no matter if positive or negative) with a grain of salt. Forums are not such a reliable source of information as in-person contact.

Google the company name. If the company is a known fraudster, chances are that you will find a lot of information about it on the Web. However, lack of negative publicity does not mean automatically that the company is great, nor do some subjective negative opinions mean that the company is a scammer.

Ask for examples of sites they have optimized. Happy customers are the best form of promotion, so feel free to ask your potential SEO company about sites they have optimized and references from clients. If you get a rejection because of confidentiality reasons, this must ring a bell about the credibility of the SEO company - former customers are not supposed to be a secret.

Check the PR of their own site. If they can't optimize their site well enough to get a good PR (over 4-5), they are not worth hiring.

Ask them what keywords their site ranks for. Similarly to the page rank factor, if they don't rank well for the keywords of their choice, they are hardly as professional as they are pretending to be.

Do they use automated submissions? If they do, stay away from them. Automated submissions can get you banned from search engines.

Do they use any black hat SEO tricks? You need to know in advance what black hat SEO is in order to judge them, so getting familiar with the most important black hat SEO tricks is worth before you go and start cross-examining them.

Where do they collect backlinks from? Backlinks are very, very important for SEO success but if they come from link farms and other similar sites, this can cause a lot of trouble. So, make sure the SEO firm collects links from reputable sites only.

Get some personal impressions, if possible. Gut instinct and impressions from meetings are also a way to judge a company, though sometimes it is not difficult to get mislead, so use this approach with caution.

High price does not guarantee high quality. If you are eager to pay more, this does not mean that you will get more. Just because a firm costs more DOES NOT make them better SEO's. There are many reasons for high prices and high quality is only one of them. For instance, the company might work inefficiently and this is the reason for their ridiculously

high costs, not the quality of their work.

Cheap is more expensive. This is also true. If you think you can pay peanuts for a professional SEO campaign, then you need to think again. Professional SEO companies offer realistic prices.

Use tricky questions. Using tricky questions is a double-edged sword, especially if you are not an expert. But there are several easy questions that can help you.

For instance, you might ask them how many search engines they will automatically submit your site to. If they are scammers, they will try to impress you with big numbers. But in this case, the best answer would be "no automatic submissions".

Another tricky question is to ask them if they will place in you top 10 for some competitive keywords of your choice. The trap here is that it is them, not you, who chooses the words that are best for your site. It is not that probable that they will choose exactly the same words as you suggest, so if they tell you that you just give them the words and they push you to the top, tell them “Goodbye”.

Do they offer subscription services? SEO is a constant process and if you want to rank well and keep on like that, efforts are necessary all the time. Because of this, it is better to select a company that includes post-optimization maintenance, than get a company that pushes your site to the top and then leaves you in the wild on your own.