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Technologies / AppSignal / Mailgun

Companies using AppSignal and Mailgun

6 companies in our data have public evidence for both AppSignal and Mailgun, and 6 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

6companies use both
30%of AppSignal users
1%of Mailgun users
6name both as subprocessors

Companies using one are 14 times as likely as the average company in our data to show evidence of the other.

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

CompanyAppSignalMailgun
Atto Partnersattopartners.comAtto Partners is a strategic design and development studio focused on online software and responsible AI.Design and creativeConsulting and services
Levellevel.ioLevel is an IT management platform that offers patch management, scripting, remote control, inventory tracking, monitoring and alerting, and automations for managing devices.
Moneybirdmoneybird.comMoneybird provides accounting software for entrepreneurs, including invoicing, bookkeeping, VAT returns, and online payments.Finance and accounting software
Participant Kitparticipantkit.comParticipant Kit provides participant management software for user research teams, including recruitment, consent forms, scheduling, and data governance tools.Productivity and collaboration
Spark Real Estatespark.reSpark provides an all-in-one software platform for new development marketing and sales.Real estate
Timelinetimeline.coTimeline provides an integrated planning, investing and platform ecosystem for financial advisers.Finance and accounting software

The two technologies

AppSignal

Observability

AppSignal is error tracking and performance monitoring software. It is used to show errors, slow queries and the deploys responsible for them.

Summarized from appsignal.com on 8 Nov 2026.

30% of the 20 companies we see using AppSignal also show the other.

All 20 companies using AppSignal20 name it as a subprocessorMore in Observability

Mailgun

by Sinch · Email and communications

Mailgun is a transactional email delivery service and API that developers use to send, receive, track, and validate emails. It also offers tools for optimizing email deliverability and previewing emails before they are sent.

Summarized from mailgun.com on 8 Nov 2026.

1% of the 487 companies we see using Mailgun also show the other.

All 487 companies using Mailgun432 name it as a subprocessorMore in Email and communications

Other pairs

Companies with their own evidence for both.

More with AppSignal

Cloudflare20companiesAmazon Web Services14companiesGoogle Workspace14companiesStripe10companiesGoogle Analytics9companiesGoogle8companies

More with Mailgun

Cloudflare486companiesAmazon Web Services348companiesGoogle Workspace337companiesGoogle Tag Manager267companiesStripe247companiesOpenAI240companies

Questions

How many companies use both AppSignal and Mailgun?

6 companies in StrataDB's data have public evidence for both, and 6 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use AppSignal and Mailgun?

Atto Partners, Level, Moneybird, Participant Kit and Spark Real Estate, and 1 more company. Each one links to the evidence behind it.

How does StrataDB know a company uses AppSignal and Mailgun?

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 AppSignal and Mailgun

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.

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