The quarterback said he will have individual workouts with both teams -- which each have long-term needs at quarterback -- following his workout at Florida's pro day, on March 17, according to a report on NFL.com.
Tebow, who took part in the NFL scouting combine but did not throw there, is expected to unveil his recently revamped throwing motion at Florida's pro day.
The Bills have an immediate need for a quarterback, while the Seahawks are eyeing a long-term solution to eventually succeed veteran starter Matt Hasselbeck.
Tebow said he has been working out with Arizona State offensive coordinator Noel Mazzone and Marc Trestman, the coach of the CFL's Montreal Alouettes, on key aspects of the pro passing game, according to the report. Mazzone coached San Diego Chargers quarterback Philip Rivers at NC State, while Trestman worked with Steve Young and Rich Gannon with the 49ers and Raiders, respectively.
Tebow has a supporter in former Buffalo quarterback and Hall of Famer Jim Kelly, who has said the two-time BCS national champion and Heisman Trophy winner could be the answer to the Bills' QB woes. The Bills have started nine different quarterbacks since Kelly retired and are mired in a decade-long playoff drought.
"Whether it's Tim Tebow, whether they'll have a shot at him when draft time comes ... you have to look at the top three quarterbacks in the draft, really study them," Kelly said last year, in an interview in USA Today. "And you look for a guy with good character, good leadership ability and good arm strength."