/
Log inGet free API keyAccount
Menu
CompaniesTechnologiesAI indexDocsPricingChrome extensionLog inAccount

Technologies / Fastmail / Next.js

Companies using Fastmail and Next.js

4 companies in our data have public evidence for both Fastmail and Next.js. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

4companies use both
27%of Fastmail users
under 1%of Next.js users
0name both as subprocessors

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanyFastmailNext.js
Auth57 Labsauth57.ioAuth57 provides verified prior-authorization rule data for drugs, procedures, and services across all 51 states.Healthcare
Auth57 Labsauth57labs.comAuth57 provides verified prior authorization rule data for drugs, procedures, and services across all 51 states.Healthcare
RenderFormrenderform.ioRenderForm is a graphics editor for designing templates that automate repetitive image, PDF, or video creation.Design and creativeDeveloper tools
SimpleLocalizesimplelocalize.ioSimpleLocalize provides a web-based translation editor and platform for managing translations and automating localization workflows for software projects.Developer tools

The two technologies

Fastmail

Email and communications

Fastmail is a paid email hosting service offering email, calendar, and contacts, with options for private email addresses and offline access. It is used by individuals and businesses to send, receive, organize, and manage email, calendars, and contacts across devices.

Summarized from fastmail.com on 8 Nov 2026.

27% of the 15 companies we see using Fastmail also show the other.

All 15 companies using Fastmail12 name it as a subprocessorMore in Email and communications

Next.js

by Vercel · Developer tools

Next.js is the React Framework for the Web. It is used to create high-quality web applications with the power of React components.

Summarized from nextjs.org on 8 Nov 2026.

under 1% of the 6,255 companies we see using Next.js also show the other.

All 6,255 companies using Next.jsMore in Developer tools

Industries

Among the companies above, by our own classification of their homepage.

Healthcare2Developer tools2

Other pairs

Companies with their own evidence for both.

More with Fastmail

Cloudflare15companiesStripe9companiesAmazon Web Services6companiesAnthropic6companiesHetzner6companiesGoogle5companies

More with Next.js

Cloudflare6,260companiesGoogle Workspace4,113companiesVercel3,532companiesGoogle Analytics1,826companiesStripe1,710companiesAmazon Web Services1,510companies

Questions

How many companies use both Fastmail and Next.js?

4 companies in StrataDB's data have public evidence for both. Our coverage is partial, so the real number is higher.

Which companies use Fastmail and Next.js?

Auth57 Labs, Auth57 Labs, RenderForm and SimpleLocalize. Each one links to the evidence behind it.

How does StrataDB know a company uses Fastmail and Next.js?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using Fastmail and Next.js

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • Every company and vendor, with its public source
  • 100 API calls a month, plus MCP and the Chrome extension
  • Work email only. No card, no sales call