Less Than Half the Cost of Hiring.
Most companies choose between a $250k/year CTO hire, a $30k–50k/month agency, or a patchwork of freelancers. None of them deliver strategy and execution in one team. The Interspark retainer is the alternative: CTO-level strategy and senior development for $8,500/mo.
Your Retainer
CTO & Development Retainer
Your outsourced CTO office — 100 hours of senior development, 10 hours of CTO-level strategy, and direct access to the team doing the work.
- 100 hours of senior development per month
- 10 hours of CTO-level strategy (architecture, roadmapping, UX strategy, vendor evaluations)
- Dedicated senior engineering team
- Meaningful progress updates
- Project visibility and reporting
- Acceptance-driven delivery against defined criteria
- Async communication (Slack, email) always included
Additional Development Hours
Your retainer includes 100 dev hours and 10 CTO strategy hours each month. Need more development capacity? Adjust below.
Plus 10 hours of CTO strategy always included.
What your retainer covers
- • Feature development, bug fixes, and infrastructure work
- • Architecture reviews and technical strategy
- • UX/UI strategy and roadmapping
- • Vendor evaluations and technology decisions
Async communication (Slack, email) is always included at no extra cost.
Optional Add-Ons
Your Estimated Monthly Total
$8,500/mo
Base Retainer: $8,500/mo (100 dev hrs + 10 CTO hrs)
Need something custom?
For larger engagements, multi-product portfolios, or dedicated team structures, we'll design a retainer that fits your scale.
Get in TouchFrequently Asked Questions
What's included in the $8,500 base retainer?
100 hours of senior development work per month: feature builds, bug fixes, infrastructure, and integrations. Plus 10 hours of CTO-level strategy: architecture reviews, technology roadmapping, UX/UI strategy, and vendor evaluations. Communication is async-first and included at no extra cost.
What does CTO-level strategy actually cover?
Architecture reviews, technology roadmapping, UX/UI direction, vendor evaluations, and board-ready technical assessments. It's the thinking that usually requires a $250k hire. You get 10 hours per month of it, integrated with the team doing the building.
What happens if I need more than 100 dev hours?
Overage is billed at a flat $150/hr. No negotiations, no tiered pricing. We'll flag it before going over so there are no surprises on your invoice.
How is this different from hiring an agency?
Agencies sell you a process and staff it with whoever's available. We give you a consistent senior team — no account managers, no juniors learning on your dime. The people setting the technical direction are the same people writing the code.
Can I cancel?
Yes, give us 30 days notice and we'll wrap up cleanly. No penalties, no exit fees. We keep working through the notice period so nothing falls on the floor.
How senior are your engineers?
Every engineer averages 10+ years of professional experience, team leads 15+. You will never be staffed with junior developers. That's not a sales line; it's how we operate.
The math is straightforward. Let's walk through it.
Book a 30-minute call. We'll map the retainer to your specific needs and show you exactly what $8,500/mo covers.
Book a Call