Experienced CTOs are among the hardest people to find. Ask any recruiter/headhunter who's tried.
Also, permanent CTOs are seldom affordable, even for later stage startups.
But there is a growing number of seasoned CTOs who've seen the inside of a number of startups and scaleups and can help you on a consultancy basis.
Many call themselves Fractional CTOs. I personally prefer CTO-as-a-Service, but what's in a name?,
The fact is that we can help out quickly, until a growth stage is reached in which a full time CTO can be hired.