I can see three forms of competition here:

- A company vibe codes their own app to replace a SaaS. Great when they only wanted a small chunk of the functionality. - Startups benefitting from AI coding are copying mature SaaS companies and competing on price. - Mature SaaS companies are branching out into each others domains. Notion is doing email. Canva is doing an office suite.

there is no saas downturn caused by AI. wall street is just starting to say hang on a minute, why is this SaaS stock trading at a price to earnings ratio of 300?

then the sell-off is attributed to AI because it is far easier to say to shareholders hey we know our company lost half its value but thats actually a good thing because we need to pivot to AI and we're going to spend all our free cash flow on AI software and our stock should totally be trading at 300x earnings again in a few weeks. if you can last another few months as CEO and the fed cuts rates you'll be able to ride it out

of course, the tide is going out on a few dogs. I don't think adobe will become dominant again

you see the same trend with mass-layoffs being blamed on AI. easy way to sell bad news to the shareholders

in 2026, AI and JE are the two reasons for absolutely everything

The reason for divergence is actually much simpler. NASDAQ 100 includes data center builders, Morgan Stanley software index doesn't. Stock market is going down across the board if you exclude data center construction.

I would assume one major thing here is that many orgs only need a small subset of functionality from what most products provide. Many times, that small subset of functionality is only "good enough" in and of itself, but the org is paying the premium for the entire suite of whatever it is. This makes realizing that an LLM can get them to MVP and beyond much easier.

Charging hundreds of thousands if not millions per year for very basic functionality is what is "killing" b2b SaaS.

been thinking about this too. the middleware layer is getting decimated first

Remember when businesses ran on cobbled together access databases and vb? It was easier than building something ny prompting an llm.I made a good living just rewriting those things for them when they fell apart.

Anybody who says this doesn't understand build vs buy, and why companies buy in the first place, or they'll selling AI.

Well it definitely killed mine so I can't say this is not true

Sure, vibe coding has impacted user's expectations. They know you can ship a new update easier and faster than before - and you actually can.

But, not sure which successful SaaS companies just stopped shipping any updates to the product, never talked to their customers and never added any new features to win over major new accounts - and still managed to survive and thrive?

And the author actually confirms this:

> AI isn’t killing B2B SaaS. It’s killing B2B SaaS that refuses to evolve.

> build once, sell the same thing again ad infinitum, and don’t suffer any marginal costs on more sales.

Unless you consider customer acquisition cost. Not considering cost of sales is one of the big mistakes software developer entrepreneurs make.