Searchlight is a fast full text search service that is built on the same infrastructure as Google. You send in your documents in simple JSON, and we'll index them and have them ready for searching almost instantaneously. From then on, just send a text query and we'll give you a set of ranked search results that you can use immediately. There's no setup, no minimum fees and no maintenance. You can also udpate and delete your documents at any point in time via the same JSON API.
Searchlight is currently under construction, so we've haven't fixed on pricing yet. To help with this, please do try out the beta when it's available - the more usage data we have, the easier it becomes to determine a fair price.