
Upwork
Fiverr
Freelancer.com
Toptal
PeoplePerHour
Elance
Hired
Guru makes it easy for employers and freelancers to connect, collaborate and get work done flexibly and securely. Browse 1. 5 million freelancers for hire and thousands of projects.

JSON-Formatter.app
JSON Formatter & Validator
JSON Formatter Live
Barcode & QR Code Scanner
JSON Formatter by: jackdalton.org
JSONFormatter.org
GS1 US Data Hub
Check digits, UPC↔EAN conversion, ISBN, IBAN validation and bulk barcode checks. Free, instant, no sign-up.
Which is more popular?
Based on our record, Guru seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | guru.com | code-classify.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from Italia · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Guru yet.
CodeClassify is a suite of 16 free, browser-based tools plus a deterministic REST API and downloadable CSV datasets for validating, converting and classifying product and business codes: GTIN/UPC/EAN barcode check digits, ISBN, IBAN (MOD-97), EU VAT, VIN, SSCC pallet codes, ISO 6346 containers,...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Guru is recommended for freelancers seeking flexible work opportunities in fields such as writing, graphic design, programming, and digital marketing. It's also suitable for clients looking for skilled professionals to complete short-term or long-term projects.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How To Get Clients EASILY on Guru.com (Step-By-Step Method for Freelance Websites)
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Guru and CodeClassify.
CodeClassify's answer:
E-commerce sellers & ops validating GTIN/UPC/EAN before listing on Amazon, eBay or Shopify
Developers & data engineers needing a deterministic API for bulk validation and classification
Accountants & analysts working with NAICS/SIC business codes
Logistics, customs & trade teams handling HS codes, SSCC pallets and ISO 6346 containers
Finance/fintech teams checking IBAN, EU VAT and routing numbers
CodeClassify's answer:
CodeClassify is deterministic: every result is computed from official public standards (GS1 Mod-10, ISO 13616, ISO 3779, U.S. Census NAICS/SIC, U.S. HTS), so the same input always returns the same output — no AI guessing, no invented codes. It's also unusually broad: one place to validate, convert and classify barcodes (GTIN/UPC/EAN), ISBN, IBAN, EU VAT, VIN, SSCC, ISO 6346 containers, ABA routing numbers, and business codes (NAICS/SIC/HS) — as free browser tools, a REST API, and downloadable datasets.
CodeClassify's answer:
CodeClassify runs on Cloudflare Pages for the static tools and Cloudflare Workers + D1 for the API and dashboard. The validation and classification logic is implemented directly from official public standards and datasets (GS1, ISO, U.S. Census, U.S. HTS). Payments are handled by Stripe, and the API is also distributed on RapidAPI.
CodeClassify's answer:
Most alternatives are single-purpose (just barcodes, or just IBAN) or AI-based classifiers that can hallucinate codes that don't exist. CodeClassify covers every major product and business code in one place, computes results from official standards (auditable and repeatable), and offers three ways to use it: free tools with no sign-up, a deterministic API for bulk and automation, and clean CSV datasets. It's built for feeds, compliance and data pipelines where "the same answer every time" matters.
CodeClassify's answer:
CodeClassify started from a simple frustration: product and business codes are everywhere, but checking them meant a dozen scattered, ad-heavy sites — and newer "AI" tools would confidently return codes that don't exist. The goal was one clean, fast place that computes every answer from the official standard, keeps the everyday tools free and sign-up-free, and offers an API and datasets for teams that need to work at scale.
Share your experience with using Guru and CodeClassify. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Guru offers several advantages over Upwork that make it a preferred choice for freelancers and businesses alike. With its secure payment system, flexible payment options, and collaborative WorkRooms, Guru provides a...
Guru caters to freelancers with diverse skills and expertise by offering a wide range of project categories. Whether freelancers specialize in writing, design, programming, marketing, or other fields, they can find...
Guru is a freelance marketplace that connects employers with freelancers for various projects, including remote jobs. It provides a platform for freelancers to find remote job opportunities, collaborate with clients,...
We have no reviews of CodeClassify yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Guru.com and similar website have tons of resources for starting freelancers. You won't land yourself a cushy programming job in the first week, you may need to hustle long work weeks and multiple employers, but if you are a trained... Source: over 5 years ago
Cloud hosted, haven't done any assessment. Maybe something like freelancer.com or guru.com is similar. Source: over 5 years ago
Go to guru.com and get a data miner to find you a list of 500 relevant blogs, contact details etc. Source: over 5 years ago
Tracking CodeClassify since Jul 2026.
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