- Twitter Firehose - full stream of all Tweets, commercial
- Twitter Decahose - 10% sample of Tweets for analysis, commercial
- Twitter Powertrack - real-time streaming of posts based on query (country, language, keyword, etc.), commercial
- Twitter Full-archive API - search interface for entire corpus of Tweets, commercial
- Twitter Streaming API - a mini-powertrack of posts based on basic keyword searches (up to 400 keywords), free
- Twitter Streaming Sample - a small sampling of Tweets for statistical analysis, free
There's a couple more esoteric product offerings from a data perspective, but these are the relevant ones. I think it's a pretty broad breadth of different options, with different functionality at the free and commercial options.
- Twitter Firehose - full stream of all Tweets, commercial
- Twitter Decahose - 10% sample of Tweets for analysis, commercial
- Twitter Powertrack - real-time streaming of posts based on query (country, language, keyword, etc.), commercial
- Twitter Full-archive API - search interface for entire corpus of Tweets, commercial
- Twitter Streaming API - a mini-powertrack of posts based on basic keyword searches (up to 400 keywords), free
- Twitter Streaming Sample - a small sampling of Tweets for statistical analysis, free
There's a couple more esoteric product offerings from a data perspective, but these are the relevant ones. I think it's a pretty broad breadth of different options, with different functionality at the free and commercial options.