Extend B2B Inventory Reserve vs HoldCart — Cart Reservation
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 16, 2026 for Extend B2B Inventory Reserve, Oct 29, 2026 for HoldCart.
The short answer
- Only HoldCart lists a free plan. Paid plans start at $29/month for Extend B2B Inventory Reserve and $19.99/month for HoldCart.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Plus
Free
- · 15-minute hold timer
- · One-click disable & safe uninstall
- · Protect 3 products
- · Real inventory holds, fail-safe
- · Up to 100 reservations/month
Pro
- · Analytics dashboard
- · Checkout grace period
- · Custom hold timers, 2 to 60 min
- · Priority support
- · Unlimited reservations
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureYou're running wholesale and retail from the same inventory pool and your best accounts are losing stock to lower-priority orders. Extend B2B Inventory Reserve puts you in control: reserve inventory for the buyers who matter most, define how long you hold it, and let your customer hierarchy ; not a first-come queue — decide who gets fulfilled first.
Shoppers add a one-of-a-kind item to their cart, race to checkout, and find it already sold. HoldCart places a genuine inventory hold the moment an item is added, so the unit is actually reserved while they check out, then auto-releases back to stock when the timer ends. It is not a fake countdown or manufactured urgency — it is a real hold with a real timer.
- Reserve Inventory: Set aside specific quantities for B2B companies and locations
- Time-Limited Reservations: Create reservations with expiry dates.
- Real-Time Enforcement: Inventory limits enforced on your storefront right away.
- Smart Cart Management: Stops overselling while honoring customer reservations.
- Real inventory holds — items are genuinely reserved at add-to-cart, not faked
- Fail-safe by design — if the app fails, your checkout keeps working
- Honest countdown — shoppers see a real timer backed by a real hold
- Automatic release — holds expire and return to stock on their own
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Extend B2B Inventory Reserve |  HoldCart |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Extend B2B Inventory Reserve | HoldCart |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 3 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Extend B2B Inventory Reserve | HoldCart |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $29/month | $19.99/month(ahead) |
| Longest free trial | 15 days | 14 days |
| Plans listed | 1 | 2 |
Listing
| Measure | Extend B2B Inventory Reserve | HoldCart |
|---|---|---|
| Shopify category rank | #206 | #13(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Jul 28, 2026 | Jun 19, 2026 |
| Languages | 1 | 1 |
| Developer | Codup | Useful Plugins |
FAQ
Extend B2B Inventory Reserve and HoldCart: common questions
- Is Extend B2B Inventory Reserve or HoldCart cheaper?
- Only HoldCart lists a free plan. Paid plans start at $29/month for Extend B2B Inventory Reserve and $19.99/month for HoldCart. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 16, 2026 for Extend B2B Inventory Reserve, Oct 29, 2026 for HoldCart; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 16, 2026 for Extend B2B Inventory Reserve, Oct 29, 2026 for HoldCart. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.