Catalog Signal vs PartPair
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for Catalog Signal, Nov 10, 2026 for PartPair.
The short answer
- Paid plans start at $19/month for Catalog Signal and $39/month for PartPair.
Head to head
Catalog Signal
Starter
- · 1 active source library
- · 3,000 published fitment relationships
- · 300 relationships during 3-day trial
- · CSV import, SKU match & review
Growth
- · 1 active source library
- · 20,000 published fitment relationships
- · Missing-model reports & CSV export
Pro
- · 10 active source libraries
- · 100,000 published relationships
- · Daily CSV checks create review drafts
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureDo your Shopify products and eBay listings show different barcodes or part numbers? Upload an eBay or supplier CSV to compare matching products. See conflicting GTINs, part numbers, brands, sizes and colors, plus missing details. Choose a trusted source, review the evidence and export findings for correction. Scans are manual and read-only, with up to 5,000 variants per source.
PartPair helps merchants maintain fitment data in separate source libraries. Import a general CSV, map vehicle models and Shopify SKUs, and review exact variant matches before approval. Publish an immutable version for one source at a time, then restore an earlier version when needed. The product-page checker reads published fitment data; when active sources disagree, it displays Unconfirmed.
- Compare GTIN, part number, brand, size and color across linked records
- Review suggested corrections with evidence from your chosen trusted source
- Identify missing information and ambiguous mappings; export findings as CSV
- Import general fitment CSVs and review invalid or conflicting rows.
- Match exact Shopify SKUs and approve each product fitment relationship.
- Publish or restore a separate version for each fitment source.
- Show source-backed fitment results on product pages.
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 |  Catalog Signal | |
|---|---|---|
| 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 | Catalog Signal | |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Catalog Signal | |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $19/month(ahead) | $39/month |
| Longest free trial | 7 days | 3 days |
| Plans listed | 1 | 3 |
Listing
| Measure | Catalog Signal | |
|---|---|---|
| Shopify category rank | #253 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Oct 16, 2026 | Nov 10, 2026 |
| Languages | 1 | 1 |
| Developer | Nahrin Oda | PartPair |
FAQ
Catalog Signal and PartPair: common questions
- Is Catalog Signal or PartPair cheaper?
- Paid plans start at $19/month for Catalog Signal and $39/month for PartPair. 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 Nov 4, 2026 for Catalog Signal, Nov 10, 2026 for PartPair; 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 Nov 4, 2026 for Catalog Signal, Nov 10, 2026 for PartPair. 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.