Last updated: September 2026
Global rank: Worldwide · 2026-09
#337,146
AI visibility: Grade B
77
SEO health: Latest audit
78
Visits
3.4K
per month, estimated
Keywords
227
ranking in Google
Organic share
100%
3.4K organic visits
LLMS.txt
Published
79 lines AI engines can read
You're seeing the free preview of proj.org
proj.org Company Profile
PROJ is the leading open source library for coordinate reference system transformations and geospatial data processing. It powers spatial calculations across dozens of applications used by governments, research institutions, and private companies worldwide. The project maintains a comprehensive database of coordinate systems and transformation methods that developers rely on for accurate mapping and location-based wo…
PROJ was founded in 1993, about 33 years ago. Its profile files it under Software & Internet, with further tags for AI, Data & Automation; GIS Software; and Geospatial Software. Total funding on record is Bootstrapped. Its tagline reads: "Open source coordinate transformation and geospatial software".
- Sector
- Software & Internet
- Founded
- 1993
- Revenue
- Not Disclosed
- Funding
- Bootstrapped
proj.org Web Traffic Statistics
Key findings
- PROJ (Software & Internet) is ranked #337,146 worldwide in our September 2026 domain ranking, up 28,719 places from #365,865 in August 2026.
- It is estimated to receive about 3,380 visits a month from search, 100% of it organic, across 227 ranking keywords.
- Its AI visibility score is 77 out of 100 (grade B), with a published llms.txt of 79 lines.
- Its last technical audit scored 78/100, with "Add a Meta Description" the highest-priority fix.
| Month | Rank | Move |
|---|---|---|
| September 2026 | #337,146 | ▲ 28,719 |
| August 2026 | #365,865 | ▲ 20,142 |
| July 2026 | #386,007 | ▲ 10,629 |
| June 2026 | #396,636 | — |
| May 2026 | #396,636 | ▲ 97,525 |
| April 2026 | #494,161 | ▲ 27,867 |
| March 2026 | #522,028 | ▼ 23,278 |
| February 2026 | #498,750 | — |
What this company does
PROJ is the leading open source library for coordinate reference system transformations and geospatial data processing. It powers spatial calculations across dozens of applications used by governments, research institutions, and private companies worldwide. The project maintains a comprehensive database of coordinate systems and transformation methods that developers rely on for accurate mapping and location-based wo…
Our read on the site
The overall SEO health of proj.org is moderate, with a strong performance score of 93 but a low SEO score of 40. Key areas for improvement include the absence of a meta description, which is critical for search visibility, and the need for content expansion to cover relevant topics that competitors are addressing.
proj.org Traffic and Visitor Engagement
Search engines send proj.org an estimated 3,380 visits a month. Effectively all of it is organic — about 3,380 visits from unpaid results. Spread across 227 ranking keywords, that averages roughly 15 organic visits per keyword.
Monthly visits
3.4K
Latest estimate
Change
No monthly history yet
It starts building from the first scan
Organic visits
3.4K
100% of all traffic
Paid visits
0
No paid search detected
Organic vs paid
100%
0%
We don't hold a month-by-month history for this domain yet.
The traffic dashboard builds one from the first scan onwards.
proj.org AI Visibility
proj.org scores 77 out of 100 on our AI visibility scale, grade B. It takes full marks for LLMS.txt and Crawlability. The biggest gap is SEO health, at 8 of 20 points (40/100), worth 12 points if closed. It also loses points on Company profile (19/25) and Structured data (0/5).
Grade B
Scored from this domain's own data — llms.txt, profile completeness, technical health, crawlability and structured data.
Present
6/8 core fields
40/100
robots ✓ · sitemap ✓
Not detected
Fix these first
- → Complete your company profile so AI answers about you stay accurate.
proj.org LLMS.txt
The llms.txt on proj.org runs to 79 lines (5,401 characters) across 12 sections, last generated in May 2026. It introduces the site as "PROJ - Geospatial Coordinate Transformation Library". It tells AI engines the business works in Software & Internet; AI, Data & Automation; and GIS Software. It describes 5 products, with prices such as PROJ Library at Free / Open Source, PROJ Command Line Tools at Free / Open Source and PROJ Documentation at Free. Services it lists include Coordinate Transformation, Geospatial Data Processing, GIS Integration and Custom Transformation Development. Technologies it mentions include C, C++, Python and JavaScript. The keywords it claims start with "geospatial software", "coordinate transformation", "cartography tools" and "GIS software".
Status
Published
AI engines can read it
Lines
79
In the file
Size
5.4K
Characters
Sections
12
Updated May 17, 2026
What the file says
# PROJ - Geospatial Coordinate Transformation Library ## About PROJ is the leading open source library for coordinate reference system transformations and geospatial data processing. It powers spatial calculations across dozens of applications used by governments, research institutions, and private companies worldwide. The project maintains a comprehensive database of coordinate systems and transformation methods that developers rely on for accurate mapping and location-based work. PROJ handles everything from simple latitude-longitude conversions to complex datum shifts and projection calculations that underpin modern GIS workflows. Its modular design allows integration into everything from desktop mapping tools to large-scale geospatial databases and web services. The library has become a foundational component in the open geospatial ecosystem, with widespread adoption across both commercial and academic environments. PROJ serves cartographers, surveyors, GIS analysts, and software developers who need reliable spatial calculations in their applications. Its active community contributes regular updates, bug fixes, and new transformation methods to keep pace with evolving geospatial standards. The project emphasizes accuracy, performance, and broad compatibility across different operating systems and programming languages. PROJ documentation provides clear guidance for install
Sections in the file
Areas of work
Keywords it claims
Technologies
Products it tells AI about
- PROJ LibraryFree / Open Source
- PROJ Command Line ToolsFree / Open Source
- PROJ DocumentationFree
- PROJ Community ForumFree
- PROJ UpdatesFree
Services it tells AI about
- Coordinate TransformationFree
- Geospatial Data ProcessingFree
- GIS IntegrationFree
- Custom Transformation DevelopmentFree
- Performance OptimizationFree
Competitors it names
Company type
Private
proj.org Organic Keywords
Google lists proj.org for about 227 keywords, which together bring an estimated 3,380 organic visits a month.
Ranking keywords
227
Found in Google for this domain
Visits they bring
3.4K
Estimated organic visits a month
Top ranking keywords
No ranked-keyword data cached for this domain yet.
Ranked Keywords pulls the full list on its first run.
What it ranks for
proj.org SEO Audit
The latest technical audit of proj.org scored 78 out of 100 overall. SEO is its weakest area at 40, while performance scores highest at 93. The audit makes 12 recommendations in all, and 2 of the 4 listed first are rated high priority or critical.
Overall
SEO
Performance
Excellent
Accessibility
Fix these first
- CriticalAdd a Meta Description
- HighCreate Content for Identified Gaps
- MediumOptimize Heading Structure
- MediumImplement llms.txt File
8 more recommendations, with the exact changes and the pages they apply to, are in the full report.
proj.org Competitors and Alternatives
PROJ's company profile names https://proj4.org, https://gdal.org, https://qgis.org and https://mapserver.org as competitors. Its own llms.txt adds https://postgis.net and https://geoserver.org. Outside its market, the domains ranked closest to it in our worldwide ranking are sholland.gov.uk, ivlv.me, theprotocol.it and lathetrolls.com.
proj.org Traffic by Country
Which markets this brand actually serves, and where the web links to it from.
Top customer markets
AI estimate · live webWe only measure visitor geography for domains whose analytics are connected to us. For everyone else this is read live from the web and shown as an estimate — never mixed in with the measured numbers.
No market breakdown available for this brand.
Where its backlinks come from
Measured. The country each linking site is hosted in — a real signal of which regions know this brand.
No backlink sample for this domain yet.
Backlink Analytics collects one on its first run.
proj.org Backlink Analytics
Who vouches for this domain. Strong, varied links are still the clearest signal of authority — to search engines and to AI engines that cite sources.
We haven't run a backlink crawl for proj.org yet, so there are no link counts to show. Backlink Analytics builds the profile on its first run and it appears here after that.
—
links on file
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