Datasift is to make up to two years' worth of tweets available for market research purposes to its users. Until now, it was possible to only access the last 30 days of tweets.
Datasift described the initiative as a 'massive technology challenge'. It will analyse the content, sentiment, location and influence of approximately 250 million tweets per day. The service is proving popular, with companies joining a waiting list to access the service. The data will be helpful in planning marketing campaigns and targeting influencers and may help in predicting key events and changes in consumer behaviour.
More on this story from the BBC.