The 10 Best Nexus Apps for Shopify

The top 10 apps merchants see when they search the Shopify App Store for nexus, in the exact order the store ranks them. Only Shopify's organic ranking is shown, never sponsored ads.

Updated September 8, 2026 · Organic ranking

Maintained by Rankbase, built by a Shopify app developer

Shopify calculates tax and stops there. It works out what to charge across a great many jurisdictions and it is explicit that this is not advice, that determining where you owe tax is yours to establish, and that its liability tool is no substitute for a tax authority or a professional. Calculating and remitting are different jobs, and the platform only does the first as a matter of course.

It does offer filing, but read who does it: the returns are generated and submitted by a named third-party provider, using your credentials and a bank account arrangement for the remittances, with Shopify's own documented role limited to helping the two of you talk to each other. That service is charged per return, is United States only, and excludes imported orders, sales channels not connected to Shopify, and marketplaces. The gap between what it covers and where you actually sell is the space these apps occupy.

1

Nexus: Multivendor marketplace

★ 5.0 (4 reviews) · Free

Multi-vendor marketplace: vendor onboarding, orders & fulfill
2

Nexus by EasyPost

★ 5.0 (11 reviews) · Free to install

Shipping, simplified — smarter labels, better rates
3

Functions Creator & Discount

★ 5.0 (32 reviews) · Free to install

Create unlimited discount functions, shipping, payment & rules
Built for Shopify
4

Numeral Sales Tax

★ 4.5 (137 reviews) · Free to install

End-to-end sales tax compliance done for you.
5

TaxCloud Sales Tax Automation

★ 4.7 (103 reviews) · Free to install

The Sales Tax Filing Partner For Your Brand
6

Ava AI ‑ AI Phone Agents

★ 5.0 (5 reviews) · Free trial available

24/7 AI agent that answers calls and recovers abandoned carts
7

Nexus: AI Growth Engine

★ 5.0 (60 reviews) · Free plan available

True Profit insights to deployed ad campaigns, powered by AI.
8

True COGS: Cost of Goods Sold

★ 5.0 (4 reviews) · Free plan available

The cost field moves on. Your ledger doesn't
9

Sales Tax Automation by TaxRex

★ 5.0 (127 reviews) · Free trial available

US State sales tax registration, reports & Automated filing
10

Nexus ‑ Section Library

★ 5.0 (3 reviews) · Free to install

Build custom pages with ready-to-use, no-code theme sections

Compare the top 3 head-to-head

All app comparisons →

What to look for in a Nexus app

Where your sales actually happen: If everything goes through your Shopify storefront in one country, the native path may reach further than you assume. If a meaningful share comes through marketplaces or other channels, that is precisely what the built-in filing does not cover, and it is the clearest reason in this category to buy something.
Filing and registration are separate services: Knowing you have crossed a threshold, registering in that state, and then submitting returns are three steps, and apps here cover different combinations. Registration in particular is paperwork somebody performs on your behalf rather than software, so check what is automated and what is a service with a person behind it.
What it files from: Most of these file the tax Shopify already calculated rather than recomputing it, which is usually what you want but means an error in your setup propagates rather than being caught. Ask what happens when their figures and your storefront disagree, because that reconciliation is where the value is.

Frequently asked questions

Which is the best Nexus app for Shopify?

Based on the Shopify App Store's own organic ranking for "nexus", Nexus: Multivendor marketplace currently holds the #1 spot, with a 5.0 star rating across 4 reviews. The best choice for your store still depends on your requirements, so compare the top results above.

How is this ranking determined?

We record the organic results merchants actually see when searching the Shopify App Store for "nexus", refreshed daily. Shopify's own sponsored ("Ad") results are excluded, so positions reflect its real search ranking rather than paid promotion. Source: the Shopify App Store search results for "nexus", you can verify the current ranking there yourself.

Which Nexus apps are Built for Shopify?

1 of the top 10 nexus apps holds the Built for Shopify badge: Functions Creator & Discount.

What does the Built for Shopify badge mean?

Built for Shopify
Built for Shopify is the highest level of recognition Shopify awards an app. To earn the badge, an app must meet Shopify's standards for safety, performance, ease of use, and proven usefulness: it cannot slow down the admin, storefront, or checkout, must integrate seamlessly into the Shopify admin, and must demonstrate quality through installs, reviews, and ratings over time. When comparing similar apps, preferring ones with the badge is a safe default. Learn more about the Built for Shopify badge →

As of September 8, 2026, the top-ranked nexus app on the Shopify App Store is Nexus: Multivendor marketplace, with a 5.0 star rating across 4 reviews. 1 of the top 10 carries the Built for Shopify badge, and the average rating is 4.9 stars across 486 reviews.

Related keyword rankings

All Nexus rankings → · Browse all keywords →

Rank higher on the Shopify App Store

Rankbase helps Shopify app developers track keyword positions, analyze install click data, and optimize app listings to rank higher in the Shopify App Store.

Explore Rankbase →

Built by Craftshift

Rankbase is made by Craftshift, a Shopify Partner building apps for product images, variants, and bulk catalog work. We built Rankbase to track the App Store rankings of our own apps first, then opened it to other developers, and this directory grew out of that work. The rankings on these pages are Shopify's own organic search results; we never edit them, including for our own apps.

Craftshift apps on the Shopify App Store