Brightflag, with offices in New York, Ireland, and Australia, offers their flagship legal billing application, emphasizing spend management and advanced analytics.
I already recommend Brightflag to anyone and everyone who processes invoices. There is a lot of information and data that comes on these invoices, and having a system that streamlines the information in one place has been extremely useful for a department that is a cost center and needs a quick way to justify every spend.
Super easy to set up and use. The interface is intuitive, but it's worth spending some time getting used to seeing where the different "file cabinets" are located. I recommend having one person dedicated to the day-to-day management of the platform (separate from the reviewers and approvers), someone who just manages to upload the invoices, setting up new vendors, liaising with BF Support, but cross-training everyone who uses it on the broad functions.
Customer support is spectacular. Probably the single best quality of this product. They are quick to respond, quick to troubleshoot, and quick to offer suggestions on workarounds for things that might still be in the works (or unique to us). That level of agility and can-do attitude is what I needed in a partner like this.
ROI has been superb: saw a 30% drop in legal spend (based on invoice amount) due to catching items that shouldn't have been charged or charges that exceeded agreed-upon caps.
Being able to add prior years' invoices to the system has been incredible since it allows for internal benchmarking and YoY comparison reporting.