Let’s get this out of the way: if your CTO or Head of Marketing is currently waving a Gartner report and suggesting you rip out your "legacy" e-commerce platform for something shiny, modular, and allegedly API-first, I urge you to lock the door and make them read this.
Our forcing function was the usual suspect: an aging Adobe Commerce (née Magento) instance that was indeed expensive, complex, and slow to iterate on. The vendor contract was up for renewal, and the new terms felt punitive. The internal rallying cry became "vendor lock-in bad, composable good." So we embarked on a full-stack rebuild, replacing not just the commerce engine but also the adjacent CMS and PIM. The crown jewel of this new stack was Claw's much-hyped e-commerce module, praised for its headless flexibility and developer-friendly posture.
We sequenced it like a textbook "big bang" cutover, because the business couldn't stomach a prolonged parallel run. The logic was: rebuild the data models, map the integrations to our ERP and OMS, replicate the key customer journeys, and flip the switch. Where things slipped? Everywhere you'd expect if you've ever done this before.
* **The "flexibility" tax:** Claw's module gave us beautiful control over the data layer. It also gave us the responsibility to rebuild every single front-end interaction—add to cart, persistent cart, promo code application, gift wrapping options—that Adobe handled out-of-the-box. Each one became a two-week sprint.
* **The third-party integration death by a thousand cuts:** Every payment gateway, fraud provider, tax engine, and shipping calculator that plugged seamlessly into Adobe via established extensions needed custom middleware and net-new API development against Claw's less-mature integration framework. We became an integration shop overnight.
* **The performance illusion:** Yes, our Lighthouse scores for the marketing pages soared. But the actual commerce APIs, under load from real cart activity, were slower. Much slower. The time-to-interactive for the checkout page increased by 1.8 seconds. We were so focused on page speed we forgot about transaction speed.
The result? Go-live was "successful." No orders failed. The champagne was corked. Then the first week's analytics came in. Cart abandonment rate had not just increased—it had doubled. The post-mortem pointed not to one catastrophic failure, but to the accumulated friction of a dozen micro-failures: a slightly confusing promo code field, a shipping estimator that took a beat too long to load, a persistent cart that sometimes didn't persist. The very customizability we bought into created a brittle, high-friction buying experience we're still tuning six months later.
The lesson isn't that Claw is bad. It's that "composable" is not a synonym for "simple." It's a trade-off: you exchange vendor lock-in for immense internal complexity and responsibility. The cost-benefit only works if you have the team, time, and budget to rebuild—and meticulously optimize—every single wheel your old platform provided. Most of us don't.
So, before you sign that SOW to ditch your monolith, do the *real* math. Map every feature, every integration, every pixel of UX. Then triple the estimate for the stuff you can't see. Or you'll just be trading one kind of pain for another, more expensive one.
-- Carl
Test the migration.
Hi, I'm AndrewH, I manage CRM and email for a small furniture retailer. We still run Adobe Commerce for our main site and tried Claw's module for a pop-up campaign store last year.
**True Cost:** Adobe's licensing was a steep yearly fee, but predictable. With Claw, our initial build cost was 40% higher than quoted because their "module" needed so much custom dev work to handle basic promotions.
**Abandonment Culprit:** We saw the same cart issue. In Adobe, cart persistence and tax/shipping calculation is a single bundled process. With Claw, it's three separate API calls (cart, estimates, payment intent), and latency from any one can cause the spinner to hang and users to bail.
**Dev Flexibility vs. Marketer Handcuffs:** Our devs loved Claw's API-first design. But my marketing team lost all ability to create promo codes or gift cards without a $2k developer ticket. In Adobe, I could do that in the admin panel in ten minutes.
**Hidden Migration Lift:** Even for our small pop-up, migrating customer passwords and order history was a manual, line-by-line CSV process that took weeks. Claw's docs called this "straightforward."
I'd only pick Claw's module if you have a dedicated, full-time dev team to build and maintain every single commerce feature beyond adding products to a cart. For our main site, we're sticking with Adobe Commerce despite its flaws. If you're still evaluating, what's your team's dev-to-marketer ratio, and how often do you run flash sales or complex promotions?