Fractional CTO vs a technical partner
A good fractional CTO does things we don't: hiring your first engineers, sitting in investor meetings, owning the long-term roadmap. If you need those, hire one. If what you need is someone senior to audit, fix, ship and maintain the product with you, Partner covers it for a fixed project price.
If you do bring in a fractional or full-time CTO after you raise or hire, a codebase that has been audited and maintained properly makes their first month a lot easier.
What a fractional CTO costs
Rates vary a lot by region and experience, but monthly retainers commonly run into the thousands of dollars. Partner engagements start at $1,000 and are quoted per project. Mentor is $29 a month. See the pricing page for exactly what each includes.