At present, Fairlay is an excellent competitor to Betfair in the crypto market based on my experience with them. I pay a very small commission of 0.2256% on my winnings there and the liquidity is decent too making it my favorite crypto exchange overall.
This is a bit off-topic now, but no, I don't think so. I heard good things about fairlay and checked them out for myself, but being an excellent competitor is something else imo
Betfair has no competition.
Check the market for Tottenham - Leipzig.
Betfair - volume 235,000 Euro:
Fairlay - volume 0.02 mBTC:
The navigation at Fairlay is weary, but this might be me, since I am not used to it. Afaik they have no API and/or you can't use trading software (if you can trade properly at Fairlay anyway). But it's of course fine to place your bets there, if it suits your needs. I am not saying they are bad, but they are not what I need and no competition to Betfair (yet ?).