Own or Rent? How AI Changed the Maths on Vendor Lock-In

Imagine running your whole business out of a rented shop. Not the building — the business itself. The till only works while you keep paying the till company. The shelves rearrange themselves overnight because head office pushed an update you didn't ask for. Your prices creep up every January, "due to increased platform costs". And on the day you finally decide to leave, you find that your customer list, your product photos and ten years of sales history are all written in a language only your landlord can read.

You'd never accept that for a physical shop. Yet a great many businesses accept more or less exactly that for their software, and have done for years. It's called vendor lock-in, and for a long time it was the sensible choice, because building your own was so expensive. That's the bit that's changed.

The deal that used to make sense

For most of the internet's life, custom software was a luxury. Developers were slow and expensive to hire, so renting made sense. You paid Shopify, or Salesforce, or whoever, a monthly fee, and got something that mostly worked without having to run an engineering team of your own.

That was a fair trade, and usually the right one. The catch was that you weren't really buying a tool. You were renting a relationship, and the landlord set the terms.

Tech pull-out — what "lock-in" actually means. Lock-in is anything that makes leaving painful: your data sitting in a format you can't cleanly export, workflows built around features only that one vendor offers, integrations that snap the moment you switch. The deeper your business wraps itself around their product, the higher the wall around the garden gets.

Three ways the rented model bites

The price is never quite the price. Platforms grow by raising the cost of staying put. Transaction fees, "premium" tiers for things that used to be standard, per-seat charges that swell as you hire. The sticker price gets you through the door; the real bill turns up later, once leaving has become unthinkable.

The terms change underneath you. You didn't sign up for the product you're using today. You signed up for the one from three years ago. A quiet update to the terms, a feature deprecated, an API you'd built around switched off with ninety days' notice. Anyone who's lived through a platform quietly "sunsetting" something their business leaned on knows this isn't hypothetical. It's a Tuesday.

It's a single point of failure sitting in the middle of your day. When the platform goes down, you go down with it. When their priorities shift, your roadmap shifts too, except nobody invited you to the meeting. You've handed a chunk of your operational fate to a company whose interests only ever partly overlap with yours.

None of this is villainy. It's just what renting is. The landlord optimises for the landlord.

What AI changed

With AI, the cost of building has fallen sharply, and that quietly rewrites the whole calculation. An experienced developer working with AI tooling now gets through in a day roughly what used to take the best part of a week. The dull, time-consuming bulk of the work — the wiring, the plumbing, the endless edge cases — is far quicker than it was. That doesn't replace good engineers. It multiplies them.

Once the cost of bespoke falls far enough, the old "just rent it, building's too dear" logic stops holding. The build-versus-buy decision that defaulted to "buy" for two decades is swinging back towards building and owning, at least for the parts of a business that drive and protect revenue.

Tech pull-out — this isn't "build it all from scratch". Nobody's suggesting you rebuild a payment processor in your garage. The trick is to stand on open foundations — the mature, free, battle-tested software that thousands of businesses already run — and have AI-augmented developers shape it to fit you. You get the platform's head start without the leash.

The obvious example: Shopify

Shopify is the one everybody reaches for. It's a genuinely good product and a perfectly reasonable place to start a shop, so this isn't a knock against it. But it's worth being honest about what you're renting: a fee on every sale, a storefront that looks much like everyone else's, a stack of app subscriptions on top, and your entire catalogue living inside someone else's box.

The alternative used to be too expensive to bother with. Increasingly it isn't.

• You can take WooCommerce, the open and free commerce engine that already powers a huge slice of the web, and own it outright. No tax on your own sales.
• You can put a fast, properly branded storefront in front of it, one that loads instantly and looks like you rather than a template.
• And you can host the whole thing on a server you control, for a fraction of the platform fees that only ever go one way.

Tech pull-out — "headless", and why your neighbours matter. Pairing WooCommerce with a separate modern front-end (a "headless" setup, usually built with something like Next.js) means the shopfront your customers see is decoupled from the engine running underneath it: faster, more flexible, and entirely yours. It matters for a second reason too. On most rented platforms you share infrastructure with thousands of other tenants, so a traffic spike from a noisy neighbour can throttle your checkout at the worst possible moment. On your own server the bandwidth is yours, and on a good day you serve the rush instead of buckling under someone else's.

The upshot is lower running costs, a faster site, full control of your data, and no landlord quietly deciding your fees next January. The money that was buying you a rented seat now buys the freehold.

It's not just shops

The same pattern turns up wherever a vendor has built a wall around something that really ought to be yours.

Low-code platforms like PowerApps are brilliant for a quick prototype, and then they quietly become a tax: per-user licensing, performance ceilings, and your business logic trapped inside a tool you can't take with you. A purpose-built internal app, now cheap enough to commission, runs faster, costs less to keep running, and actually belongs to you.

Off-the-shelf dashboards and BI tools charge you per viewer and still never quite show the numbers the way your team actually thinks about them. A bespoke dashboard fed straight from your own data answers your questions, and adding the next one is a small job rather than a sales call.

The general rule is simple enough. Any time a subscription is really a rental on something central to how you operate, it's worth asking the question out loud.

The question worth asking

The old question was whether you could afford to build something yourself. For twenty years the honest answer was usually no, so you rented, and lock-in was just the price of doing business.

AI has changed that answer, and the question with it. For the things that genuinely matter to your business, would you rather own them outright, or carry on renting them from a company whose priorities were never quite the same as your own?

You don't have to tear everything out tomorrow, and plenty of commodity tools are still perfectly good rented. But the next time a platform raises its fees, rewrites its terms, or holds your own data hostage behind an export wall, it's worth remembering that the trade-off has moved. Owning an open, portable, transparent stack used to be the expensive, exotic option. More and more, it's the cheaper one.

The walled garden was a fair deal when building your own field was out of reach. The field just got a lot more affordable.

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At Revitt we help businesses get out of the rental trap — taking open foundations and AI-augmented delivery to build software you actually own. If you're tired of a platform setting your terms, let's talk.