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51Degrees vs Craft Quantities

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

51Degrees compared with Craft Quantities
Detail 51DegreesCraft Quantities logo Craft Quantities
What it doesDevice and IP intelligence APIs for developers Free JSON API for construction calculators with test vectors and building codes
StageEstablished Not given
Founded2010 Not given
Based inGB Not given
Pricing modelFreemium Open source
PricingFree plan: 10,000 monthly requests (cloud and on-premise); Essentials: €49 per month for 100,000 requests (cloud); Pro: €360 per month for 1,000,000 requests (cloud); Pro Plus: €680 per month for 5,000,000 requests (cloud); Bespoke: unlimited requests, custom terms (cloud and on-premise) Free under CC BY 4.0 licence
Key features
  • Device Detection - identify device model, OS, browser, and hardware
  • IP Intelligence - location, network, carrier, and VPN detection
  • Bot detection and Human Confidence scoring
  • Geolocation and reverse geocoding powered by OpenStreetMap
  • Pipeline API for custom data services
  • 51Did Inspector tool to inspect identifiers
  • Prebid.js RTD module integration
  • Cloud and on-premise deployment options
  • Support for multiple programming languages
  • User-Agent Client Hints support
  • 1,173 construction calculators with full inputs and test vectors
  • 3,485 published test vectors for validation
  • No authentication key or rate limits required
  • Citations to building standards with section numbers
  • Executable API for running calculations on request
  • MCP server integration for AI assistants
  • 79 job takeoffs with calculator sequences
  • Cross-market glossary in US, Canadian, UK and Australian usage
  • Corrections ledger tracking confirmed errors
  • Unit conversion with exact statutory factors
What makes it different
  • Fifteen years of expertise in device detection with proprietary data
  • Open source approach with published API source code
  • Flexible deployment with both cloud and on-premise options
  • Extensible Pipeline API for aggregating micro services
  • Freemium model with free tier offering 10,000 monthly requests
  • No API key required with no rate limits or quotas
  • CC BY 4.0 licence allows commercial use and redistribution
  • Every calculation cited to specific building code sections
  • Pinned test cases prevent silent changes to published figures
  • Complete accessibility with CORS support for browser use
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)64 no change since last checkNot checked yet
Trust Flow (Majestic)170
Citation Flow (Majestic)4326
Referring domains (Majestic)39829

5 details filled in for both companies.

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