TL;DR — Two enterprise SaaS platforms, two very different trajectories. Where each one wins in 2026 and where the gap has widened.
The 2026 picture
Both platforms are hosted SaaS and target enterprise. BigCommerce historically led on open APIs and headless flexibility; Shopify Plus has spent the last 24 months out-shipping BigCommerce on B2B, AI, checkout, and ecosystem. In 2026 the platforms are not even — Shopify Plus has pulled clearly ahead in feature velocity, app marketplace, and merchant momentum, while BigCommerce remains a credible choice for API-heavy, integration-driven implementations.
Pricing & total cost
Estimated annual platform cost
| Tier | Shopify Plus | BigCommerce Enterprise |
|---|---|---|
| Starting fee | ~$2,500/mo (~$30K/yr) | Custom (typically $24K–$60K/yr) |
| Variable fee model | 0.25% with cap; flat above $800K MRR | GMV thresholds force tier upgrades |
| Transaction fees (own gateway) | ~0.15% | 0% (key advantage) |
| 3-yr TCO ($10–30M GMV) | $252K–$528K | $300K–$650K |
Feature parity in 2026
- B2B — Shopify Plus B2B is now broader and ships features faster than BigCommerce B2B Edition.
- Headless — both have strong APIs; Shopify's Hydrogen + Oxygen is a first-party React framework with managed hosting; BigCommerce relies on partner stacks.
- Checkout customization — Shopify Checkout Extensibility is the most extensible enterprise checkout on the market in 2026.
- AI — Shopify ships Sidekick, Magic, Semantic Search natively; BigCommerce AI is limited and partner-driven.
- Multi-storefront / multi-region — BigCommerce was historically stronger; Shopify Markets and Markets Pro have closed the gap.
- App ecosystem — Shopify ~8,000 apps, BigCommerce ~1,300. Quality and breadth gap is meaningful.
Mejix's honest verdict
If your roadmap is API-heavy, you have a strong in-house engineering team, and you're allergic to transaction fees on a specific gateway, BigCommerce is a defensible choice. For everyone else — and especially for B2B and merchants who want feature velocity — Shopify Plus is the safer bet in 2026.
Frequently asked questions
- Is BigCommerce really losing market share to Shopify Plus?
- Public data and partner anecdata both confirm Shopify is winning a disproportionate share of enterprise replatforms in 2024–2026, particularly in B2B and DTC mid-market.
- Can BigCommerce match Shopify on B2B?
- BigCommerce B2B Edition is solid, but Shopify Plus B2B has out-shipped it on price lists, company hierarchies, and quote workflows in the last 18 months.
- What about migration from BigCommerce to Shopify Plus?
- Straightforward technically. Customer + order history, catalog, URL preservation, integration rebuild. Typical timeline 4–6 months for mid-market.
- Are Shopify's transaction fees a problem at enterprise scale?
- Plus uses Shopify Payments by default with no platform transaction fee. Third-party gateways add a small percentage; for most merchants this is dwarfed by ecosystem and velocity gains.