The best replacement for strava is runkeeper.

The best alternatives to strava are rated as following:
★★★★★  runkeeper
★★★★  endomondo
★★★  map my ride
★★★  garmin
★★★  mapmyride
★★★  cyclemeter
★★★  garmin connect
★★  nike plus
★★  ridewithgps
★★  mapmyrun
★★  training peaks
★  my tracks
★  dailymile
★  trainingpeaks
★  sports tracker
★  mapmyfitness
★  garmin calories
★  runmeter
  runtastic
  nike+

Your alternative for strava is not listed? Suggest!
Speaking about strava, one probably shouldn't forget about suunto.

Other search terms related to strava and their ratings are:
★★★★★ suunto
★★★ garmin 510
★★★ polar
★★ garmin 810
★★ bryton
★ wahoo
★ garmin 200
★ power meter
You have in mind a companion for strava and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of strava in all years. Click on graph for more.
strava
runkeeper
endomondo