The Next SaaS Question Is Not Which Tool to Buy. It Is Whether You Should Buy It at All.

For thirty years, B2B sales technology followed a simple logic:

Need better prospecting? Buy software.

Need conversation intelligence? Buy software.

Need forecasting, coaching or enablement? Buy software.

That logic made sense because building useful software internally required developers, infrastructure, a roadmap and ongoing maintenance.

Agentic AI is changing that assumption.

A RevOps professional with access to language models, APIs, company data and modern orchestration tools can increasingly assemble capabilities that previously required another SaaS subscription.

That doesn't mean SaaS is dead.

It means the question has changed.

Stop asking which vendor to buy

Most technology evaluations still begin with:

Which vendor should we choose?

But that assumes the most important decision has already been made: that the capability should be bought.

The better question is:

Should we buy this capability at all?

And increasingly, the answer isn't simply BUY or BUILD.

It's HYBRID.

Consider prospecting and buyer intelligence. A platform may combine contact data, intent signals, account research, prioritisation and recommended actions.

But these are different capabilities.

Verified contact data may be expensive or impossible to reproduce internally.

Account research and prioritisation based on your own ICP, CRM history and business logic may be exactly what you should own.

The result:

Buy the data. Build the decisions.

That is a fundamentally different way of thinking about the GTM stack.

Five Tests before you buy – or build

In researching the second edition of Navigating B2B Sales — The Agentic Age Unpacked, I developed five tests for making that decision.

1. Liability What happens if the system gets it wrong? The greater the contractual, regulatory or financial consequence, the stronger the case for proven infrastructure or human accountability.

2. Moat Does the vendor own data, access or a network you cannot realistically reproduce? If yes, buy that component.

3. Specificity Does the capability need to work differently for your company? The more proprietary your workflow, logic and context, the stronger the case for building.

4. Volatility How quickly does the external environment change? Where APIs, regulation or deliverability rules move constantly, specialist vendors may have an advantage.

5. Blast Radius When the system fails, how far does the damage travel? An internal research assistant and an autonomous outbound agent contacting 10,000 prospects require very different engineering standards.

The crucial question is therefore no longer:

Can we build it?

Increasingly, you probably can.

The question is:

Should we own the responsibility for building and operating it?

The SaaS stack is becoming an architecture decision

This creates several useful patterns:

Buy the data. Build the decisions.

Buy the pipes. Build the payload.

Buy the floor. Build the ceiling.

Buy for now. Build the exit.

The unit of analysis is no longer the software application.

It is the capability.

That matters especially when renewal time arrives.

Instead of negotiating another 10% discount, companies should ask:

What are we actually using?

Which capabilities justify the subscription?

What have our people already rebuilt outside the platform?

Could we buy the proprietary component separately and build the differentiated layer ourselves?

And what should we absolutely continue buying?

The objective isn't to buy less software

Nor is it to build more.

The objective is much simpler:

Own what differentiates you. Buy what would be irrational to reproduce. Know the economics of the difference.

That is becoming a core management capability for CROs, CFOs, RevOps leaders and CEOs.

Because the biggest SaaS mistake in the Agentic Age may no longer be choosing the wrong vendor.

It may be buying something you no longer needed to buy.

Put your GTM stack through the Five Tests

We've turned the methodology behind Navigating B2B Sales into a Build-or-Buy Executive Audit: a focused 10-business-day review that identifies what to keep buying, what may be worth building, where HYBRID makes more sense – and what should never be built.

Find what to stop buying.

Find what to build.

Know what never to build.

Explore the Build-or-Buy approach