According to the Yedioth Ahronoth newspaper If Cellebrite succeeds, then the FBI will no longer need the help of Apple. Cellebrite is not saying anything.
Cellebrite is a good candidate to offer its services. It is a subsidiary of Japan's Sun has its revenue split between two businesses. One is a forensics system used by law enforcement, military and intelligence that retrieves data hidden inside mobile devices and technology for mobile retailers.
Cellebrite hasn't announced any new product that works with iOS 9, but it's likely to have been developing one. The FBI said that the new method was "unexpected" and they wanted to test it on other phones before they tried to unlock the shooters' phone.
The whole point really is that Apple has been trying to claim that its phone is unhackable unless it writes a new OS for it. But it looks like Cellebrite does not believe that any phone is unhackable.