Your challenge isn't one startup. It's the portfolio.
Talent scarcity
The senior CTO market is extremely competitive: months of searching per startup, with no guarantee of success.
Unaffordable cost
An onsite CTO on a €70K gross salary costs over €91K/year with social security — out of reach for a pre-seed, multiplied by every startup.
Concentration risk
All the technical knowledge in a single person per startup: a single point of failure.
The result: startups that execute slowly, pile up technical debt and burn runway on rework — with a reputational cost for the hub.
A partnership, not a vendor
The hub brings
- Business strategy and support
- Capital and access to investment
- Legal, fundraising and network
- Selection and judgement over the portfolio
Collybrix brings
- Shared senior technical leadership
- Execution: MVP, architecture, DevOps
- Applied AI and integrations
- Knowledge transfer to the internal team
We don't bill hours. We commit to the product outcome — we act as temporary technical co-founders of every startup in your portfolio.
How we serve several startups at once
Shared technical leadership
Three senior profiles bring architecture, judgement and product decisions to the whole portfolio.
One owner per project
Every startup has a dedicated lead: a single point of contact for the founder and the hub.
Execution by the whole team
Backend, frontend, DevOps, AI and data: the team's full capacity behind every project.
Why it works
- No single point of failure
- Distributed AI capacity
- Acceleration with our own tooling (Paperclip + internal platform)
How we work
Discovery & Strategy
Workshops, mapping and analysis of architecture, code, infrastructure and team. We identify quick wins and technical debt.
Roadmap
Scope, milestone-based estimation and a plan aligned with business goals.
Agile execution
Sprints with deliverables, code reviews and pair programming.
Applied AI
AI where it truly accelerates, with mentoring for the team.
Metrics and reporting
Dashboards and reports for the founder and the hub.
Handover
Documentation, mentoring and progressive autonomy.
Entry point: the Discovery Sprint
Discovery Sprint
€2,500, fixed price, closed scope and a guarantee — deductible from the first month. We can run several in parallel across the portfolio.
See the Discovery SprintBuild
Milestone-based: we start with the best-fit startup.
Ongoing collaboration
CTO-as-a-Service: recurring technical leadership per startup. We scale seats quarter by quarter.
Why Collybrix
AI and data in our DNA
Python, integrations and agents in real products.
Real scaling
Experience scaling from 1K to over 100K users.
Co-founders, not vendors
We don't bill hours: we commit to the outcome.
Reduced risk
Context from day one.
We currently operate a CTO-as-a-Service contract running until February 2027, alongside SaaS compliance platforms and MedTech projects with AI.
The comparison, per portfolio startup
Onsite CTO
- €80K–100K/year
- €70K gross + ~30% employer costs
- Single point of failure
- 3–6 months of search and onboarding
- Recruitment costs (~15% of salary)
- No multidisciplinary team
- Severance if it doesn't work out (~€6K)
- Holidays, sick leave and training on your budget
Collybrix CTO-as-a-Service
- Full team: leadership + engineers
- Immediate start
- No recruitment or social security costs
- Real scaling experience
- Flexibility
- Handover included
- No risk concentration
We work by seats, not by volume. We commit to a limited number of seats per quarter so we never compromise on quality — the same judgement you apply when selecting your portfolio.
Shall we collaborate?
Book a call or tell us about your portfolio.