We don't advise founders.We co-build with them.
Nebula Startup School is a venture builder. We exist because India's next generation of companies needs a different kind of partner - one whose incentives are tied to outcomes, not retainers.
Founders shouldn't have to wear every hat.
Most early-stage companies don't fail for one dramatic reason - they fail at the weakest link in the chain. Our model exists to expose those weak links and remove them with you, as operators on your team.
The Chain Problem
You're only as strong as your weakest link. A brilliant product with broken go-to-market still fails. A perfect cap table without product-market fit still fails. The chain snaps at its weakest point - and most early teams have several weak links by default.
- Product, GTM, cap table, and PMF are all load-bearing.
- A single weak link can sink the whole company.
The Patchwork Problem
Founders try to patch the gaps with part-time advisors, freelancers, and YouTube tutorials. The result is fractional help that never quite becomes anything full-time, anything accountable, anything that compounds.
- Advice without ownership rarely ships.
- Fragmented, part-time help does not compound.
We Co-Build
Our model is different. We take real operating roles and stay until the work is done. Our compensation is tied to the company we help you build - not to hours logged or decks delivered.
- We hold real operating seats on your team.
- Our pay is aligned to your outcome, not our hours.
The bottom line: we don't hand you advice and walk away. We co-build - accountable to the same outcome you are.
See how we workSame side of the table. Same outcome.
Every engagement we run is structured around one principle - we earn when you do. Vesting equity and consulting fees align our economics with your milestones. No retainer that pays whether or not the company makes it. No fixed-fee deck-and-disappear arrangement. We're partners. The cap table reflects it.
No retainers
We earn when you do.
Milestone-tied equity
Outcome-based compensation.
Partner economics
Shared upside, shared accountability.
Shared upside model
When the company compounds, our upside compounds with it.
Nebula model
We rise only when the business clears real milestones.
Vendor model
Fees stay flat even when the company does not move.
Our commercial model, in plain terms.
Three ways to work with us. Each is structured differently, and the economics match the level of involvement - pick the depth of partnership your stage needs.
Venture Building
We embed as operating co-founders and build the company alongside you.
Best for
Founders who want a real operating partner inside the company.
Economics
Vesting equity + operating fee
- Active on product, fundraising, and go-to-market
- Milestone-tied equity instead of passive upside
- Full team, network, and capital relationships in play
- Best fit when the company needs build-with-you intensity
Fractional Leadership
A senior operator embedded part-time, scoped precisely to your needs.
Best for
Teams that need one strong operator without a full-stack build partner.
Economics
Monthly fee, role-scoped
- Monthly fee aligned to role and time commitment
- No vesting equity unless separately negotiated
- Reviewed quarterly with no long lock-ins
- Best fit when one function is the bottleneck
Startup School
An 8-week program that takes a cohort from idea to investor-ready.
Best for
Early founders who need structure, speed, and feedback loops.
Economics
Cohort fee + scholarship access
- 8 weeks of curriculum and live mentorship
- Deck and financial model review
- Demo day access
- Best fit when the company needs a launch system first
One operator. One mission.
Founder & CEO
Arunachalam S
"Less chaos, more shipping."
Serial entrepreneur and growth strategist. Arunachalam has worked with 100+ startups to build predictable, scalable growth systems. He built a micro-SaaS product in public to profitability in a single month, and previously scaled a service business to Rs 2 Cr+ revenue with a 20+ person team.
We're not a syndicate. We're not a deck shop. We're not a SaaS platform.
Founders have more options than ever - and more confusion. Pitch-deck services, fundraising platforms, six-week accelerators, angel syndicates. Each does one thing. We do the whole thing.
The usual options
- Pitch-deck shopsPolish a deck, then hand it back.
- Angel syndicatesWrite a cheque, then step away.
- 6-week acceleratorsA crash course, then you're on your own.
- SaaS platformsSoftware, but no operators in the room.
The Nebula way
Full-stack venture builder.
- Operating roles across product, GTM, and fundraising
- On the cap table, aligned to your outcome
- Full team, network, and capital relationships in play
- We stay until the company stands on its own
Tamil Nadu as the anchor
Local base. National operating network.
Built in Tamil Nadu. Built for India.
Nebula is deliberately based outside the metro startup corridors because we believe India's next wave of category-defining companies will come from beyond Bengaluru and Gurugram. Our team, network, and capital partners are positioned to back founders wherever they are.
Operates from
Tamil Nadu
Backing founders
Across India
Playbooks from the people building alongside you
Fundraising guides, validation frameworks, and the hard lessons of building in India.
Let's build something that matters.
We work with a small number of founders each year. The ones we partner with get the full weight of our team, our network, and our capital relationships. If that sounds like the partner you need - let's start a conversation.
Talk to the founder directly. We reply within two working days.
Applying to Nebula 1.0? Apply here →