Companies Using Plotly

Plotly is the odd one out in our charting table: a widely used library with a small public footprint. Our October 2026 crawl finds 1,643 live domains, 883 matched to a company, 21st of 55 in Charting & Data Visualization. A domain counts when a page defines Plotly's global object (Plotly.version) or loads Plotly from cdn.plot.ly. I opened 45 random live domains: 38 loaded, and 36 of those 38 ran Plotly. Of the 50 named companies below, I confirmed it on 43; the rest are log-in portals and apps that wouldn't render for me.

A floor, not a market

npm counted 770,998 downloads of plotly.js and 561,229 of plotly.js-dist-min in the week to 11 October 2026, and Plotly's about page says its open-source tools have been downloaded over a billion times. Most of that runs in notebooks, Python scripts and internal Dash apps behind a log-in. What reaches a public page is a thin slice: data hubs, client portals, calculators and dashboards. Our count sees that slice and nothing else.

Sales signal: a Plotly domain marks a team that builds its own data products in code, usually Python. That's a better buying signal for data tooling than for marketing software.

How it gets onto a page

Of the 1,132 Plotly domains where we logged third-party scripts, 508 load it from cdn.plot.ly. The rest host their own copy or bundle it, and Dash apps serve it from their own component path, as IWH Halle's regional dashboard does. Two routes aren't anyone's charting choice. A WordPress quiz-plugin add-on (its files sit under qsm-ultimate) ships Plotly 2.34.0 on every page, which is how Idaho Central Credit Union and Team Rubicon carry it. And 79 of 1,651 domains (4.8%) are email-only domains showing a holding page from Soverin, an email provider, under its own name or Dutch ISP Freedom Internet's. That page bundles Plotly.

Versions are spread wide. On 65 pages where I could read Plotly.version, 16 ran a 1.x release, ten of them 1.58.5, which is what pages calling cdn.plot.ly/plotly-latest.min.js received in my checks. npm's current release is 4.1.2.

Sales signal: a site still calling plotly-latest is stuck on 1.58.5. For agencies, that's an upgrade conversation with a visible symptom.

Growth since June

The chart reads 909 in June, 1,130 in July, 1,430 in August, 1,635 in September and 1,643 in October. The rise to September reflects changes on our side, both the domains we cover and the signals we detect Plotly with, rather than a surge in adoption, and the crawled set turns over every month with dead sites out and new ones in. September to October added 8 domains. 244 domains have dropped Plotly since we began tracking it in March 2026, and 25 of them still run it on another hostname.

"Plotly's web footprint is a by-product of data teams publishing their work. Read the count as a map of where they publish." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales signal: don't size a Plotly market from this count. Use it as a list of organisations that already publish code-built dashboards.

Who the customers are

57.19% of matched companies with a known size have 1 to 10 employees and 26.43% have 11 to 50. Age is the striking part: 34.12% were founded in the 2020s, against a 17.5% median across our 557 published profiles, close to ApexCharts (36.19%) and far from D3 (13.07%). Only 25 of the 855 have more than 1,000 staff, and at most of the named ones Plotly is one team's page: 3M's Ask 3M site, Santander's corporate-banking client platform, Cerema's Avatar site. Blackstone and the FDIC are the exceptions, with Plotly on their main sites.

Sales signal: at large accounts, find the team that owns the portal or data hub. At small ones, the buyer is the engineering lead who picked the library.

Industries and countries

Software Development leads at 10.37%, then Technology, Information and Internet (6.03%), IT Services (5.91%) and Financial Services (5.31%). Research Services (3.02%) and Biotechnology Research (2.17%) make the top ten, which Research Services doesn't on the D3, Chart.js or ApexCharts profiles. Public bodies are common in the named list: the FDIC, Cerema, Croatia's meteorological service, the National Bank of the Kyrgyz Republic. The United States leads with 222 matched companies. The Netherlands' 66 is inflated, because 39 of them sit on Soverin holding-page domains.

Sales signal: research institutes, regulators and central banks that publish data are a natural vertical list for anyone selling data visualisation or open-data tooling.

Chart.js, D3 and switching

295 Plotly domains also run Chart.js (about 18%), 94 run D3 and 38 ApexCharts. None of these pairs passes our switching tests. Of the 330 domains ever seen with Plotly and Chart.js since March, 295 still run both; for D3 it's 94 of 101. A site in our data rarely swaps one library for another. It adds one.

"Nearly nine in ten sites ever seen with Plotly and Chart.js still run both. On the web, sites add charting libraries far more often than they drop one." - Emma Davies, Data Analyst at TechnologyChecker.io

Sales signal: pitching a Plotly site on replacing its charting is weak. Pitch what Plotly.js doesn't do on its own, such as hosting, sharing and access control for the app.

The stack around it

WordPress runs on 28.16% of the 1,651 live domains we profile and Elementor on 10.05%, but the app frameworks are the better signal: React Router 13.45%, React 10.24%, Angular 9.75%, Ruby on Rails 8.3%, Vue.js 8.24% and Next.js 6.97%. Amazon Web Services hosts 16.17%. Python is invisible to a browser, but Django (2.73%) and Dash's script paths give it away.

Sales signal: Plotly sites on React or Angular are app teams, while the WordPress ones are often a plugin or a single embedded chart. Split the list before outreach.

What it costs

Plotly.js is free under the MIT licence, and so is Dash. Plotly earns from hosting and enterprise deployment. Its pricing page (12 October 2026) lists a Free plan, Pro at $29 per creator seat a month with 30 Plotly credits, and custom-priced Enterprise; Dash Enterprise is quoted.

Sales signal: a public Dash app is a lead for hosting and deployment vendors, Plotly's own sales team included.

Key takeaways

1. 1,643 live domains, 21st of 55: a floor for a library npm downloads 770,998 times a week.

2. 79 domains (4.8%) are email-only holding pages, and they account for 39 of the 66 Dutch companies.

3. A young base, with 34.12% founded in the 2020s.

4. Software, finance, research and the public sector are where it shows.

5. No switching with Chart.js or D3: sites stack charting libraries.

How to use this list

Filter by industry and company size, then split app teams from WordPress sites. For the full list of 1,643 Plotly domains with company, size and stack data, explore TechnologyChecker.io.