EcomSource vs Go-UPC: Which Barcode API Fits You?
Go-UPC starts at $74.95 for 5,000 requests. EcomSource starts at $49 for 10,000 calls with Amazon intelligence included.
10 API calls a day, no card required.
Go-UPC is a clean, simple product API: send a UPC, EAN, or ISBN and get JSON back, with plans starting at $74.95 per month for 5,000 requests. EcomSource covers the same lookups, adds Amazon intelligence, and starts at $49 per month for 10,000 calls. Every figure in this comparison is from the two providers' own pages, checked August 2026.
TL;DR
- •Go-UPC: straightforward JSON lookups by UPC, EAN, and ISBN. Plans at $74.95, $245, and $795 per month.
- •EcomSource: the same lookups plus ASIN conversion, variations, and buy box data, from $49 per month.
- •Per 1,000 calls at entry level: Go-UPC about $14.99, EcomSource $4.90.
- •Free access: Go-UPC offers a trial key on request. EcomSource includes a permanent free sandbox, 10 calls a day.
At a glance
Sources: go-upc.com/plans and ecomsource.ai/pricing, both checked August 2026. Per-1,000 figures are simple division of listed price by included requests. Confirm current terms on the providers' pages before committing.
| EcomSource | Go-UPC | |
|---|---|---|
| Entry plan | $49/mo, 10,000 calls | $74.95/mo (Developer), 5,000 requests |
| Cost per 1,000 at entry | $4.90 | about $14.99 |
| Mid plan | $149/mo, 50,000 calls ($2.98 per 1,000) | $245/mo (Startup), 45,000 requests (about $5.44 per 1,000) |
| Top listed plan | Enterprise, custom volume | $795/mo (Enterprise), 450,000 requests (about $1.77 per 1,000) |
| Free access | Permanent sandbox: 10 calls/day, no card | Trial API key on request |
| Lookup types | UPC, EAN, GTIN, ISBN, ASIN, plus name search | UPC, EAN/GTIN, ISBN |
| Amazon data | ASIN to UPC and back, variations, buy box, sales rank | Not offered |
| Format | JSON | JSON |
| Support | Email, chat on Pro | Email, phone on Startup and up |
Where Go-UPC is genuinely strong
Simplicity. One product, one job, clean docs. If you want a barcode in and JSON out with no other concepts, it delivers.
Phone support from the Startup plan up, which some teams value in a data vendor.
High-volume list pricing. At the 450,000-request Enterprise tier, its per-call list price is very competitive.
Where EcomSource wins
Entry price. Production starts at $49 for 10,000 calls, roughly a third of the per-call cost of the Go-UPC Developer plan.
Amazon coverage. Go-UPC stops at the product record. EcomSource links it to the ASIN, the variation family, and buy box data, which is the daily workflow for sellers and seller tools.
Permanent free tier. A sandbox that never expires beats a trial you have to request when you want to test an edge case six months in.
More ways in. Web tools, Chrome extension, bulk CSV through the bulk barcode lookup, and webhooks on Professional. Go-UPC is API only.
Which should you choose?
If your product never touches Amazon and you want the most minimal vendor possible, Go-UPC is a reasonable choice and its top tier prices well at very high volume. If your work involves Amazon in any way, or you want lower entry pricing with a permanent free tier, EcomSource is the stronger fit. The fields returned are documented with live examples in the API docs, and the free UPC lookup shows the record quality on any product you pick.
Switching is one endpoint
Both APIs accept an identifier and return JSON, so migration is a request-format change, not a rebuild. The product data API page lists every returned field. Create a sandbox key, run 50 of your own products through both, and diff the responses. Plan details are on the pricing page.
Pick by use case
| Your situation | Better fit | Why |
|---|---|---|
| Very high steady volume, no Amazon needs | Go-UPC Enterprise | About $1.77 per 1,000 at its 450,000 tier is competitive list pricing |
| Anything that touches Amazon | EcomSource | ASIN conversion, variations, and buy box are core, not absent |
| Getting started or uncertain volume | EcomSource | $49 entry and a permanent sandbox lower the cost of being wrong |
| Minimal vendor, phone support valued | Go-UPC | One simple product with phone support from the Startup plan |
What to verify before you commit, whichever you pick
- Run 20 to 50 of your own products through both free tiers.
- Test your edge formats: ISBNs, GTIN-14 case codes, EANs.
- Read the limit terms, not just the price.
- Confirm the commercial license covers your use.
- Check the not-found behavior.
Do the math on your volume
Multiply your real monthly lookups by each price per 1,000 above. Then run 20 of your own products through our free sandbox and judge the records, not the marketing. Also see the barcode lookup API.
Frequently Asked Questions
Is there a free alternative to Go-UPC?
EcomSource includes a permanent free sandbox with 10 API calls a day and free web lookups, no card required. Go-UPC offers a trial API key on request rather than a standing free tier (both per their own pages, August 2026).
How much does Go-UPC cost?
Its listed plans are $74.95 per month for 5,000 requests, $245 for 45,000, and $795 for 450,000, JSON format, per go-upc.com/plans as of August 2026.
Does Go-UPC support Amazon ASINs?
Its plans page lists lookups by UPC, EAN/GTIN, and ISBN. ASIN conversion, variation mapping, and buy box data are the parts EcomSource adds on top of the same barcode lookups.
Which is cheaper at low volume?
EcomSource. Entry pricing is $49 per month for 10,000 calls ($4.90 per 1,000) against $74.95 for 5,000 (about $14.99 per 1,000). At very high volume, compare Go-UPC Enterprise with an EcomSource custom quote.
Can I test both before choosing?
Yes, and you should. Go-UPC offers a trial key on request and EcomSource has a permanent free sandbox. Run the same 20 products through both and compare the records on your own catalog.