# What does Thunderbird use? Thunderbird (thunderbird.net) shows public evidence of 23 tools, according to runsonwhat (last checked 2026-11-08). ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Custom domain | 2020-06 | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Custom domain | 2017-11 | | [WP Engine](https://www.runsonwhat.com/reverse/wpengine) | Hosting & Cloud | Custom domain | 2019-10 | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Matomo](https://www.runsonwhat.com/reverse/matomo) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Email records, Website code | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Email records, Custom domain, Website code | 2019-12 | | [GitBook](https://www.runsonwhat.com/reverse/gitbook) | Support & Docs | Custom domain | 2019-03 | | [Read the Docs](https://www.runsonwhat.com/reverse/readthedocs) | Support & Docs | Custom domain | 2024-11 | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records | | | [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Atlassian](https://www.runsonwhat.com/reverse/atlassian) | Dev Tools | DNS verification records | | | [Valimail](https://www.runsonwhat.com/reverse/valimail) | Security & Compliance | Email records | | | [1Password](https://www.runsonwhat.com/reverse/1password) | Security & Compliance | DNS verification records | | | [Cursor](https://www.runsonwhat.com/reverse/cursor) | Dev Tools | DNS verification records | | | [Notion](https://www.runsonwhat.com/reverse/notion) | Collaboration | DNS verification records | | | [Fastmail](https://www.runsonwhat.com/reverse/fastmail) | Workspace | Email records | | | [Remote](https://www.runsonwhat.com/reverse/remote) | People & HR | DNS verification records | | | [Coursera for Business](https://www.runsonwhat.com/reverse/coursera) | People & HR | DNS verification records | | ## FAQ ### What tools does Thunderbird use? As of November 2026, runsonwhat has found 23 tools at Thunderbird (thunderbird.net) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon CloudFront. Application: jQuery and Anthropic. Data & Observability: Matomo. Go-to-market: Mailchimp, Zendesk and GitBook. Company Ops: Microsoft 365, Google Workspace and Apple Business. Last checked November 8, 2026. ### What cloud does Thunderbird run on? Thunderbird uses Amazon Web Services for hosting and cloud infrastructure, alongside WP Engine, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services, and Thunderbird has used it since at least June 2020. Amazon Web Services is used by 147,261 companies runsonwhat tracks. ### What email provider does Thunderbird use? Thunderbird uses Microsoft 365 for email and office software, alongside Google Workspace, Apple Business and Fastmail, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 729,581 companies runsonwhat tracks. ### What does Thunderbird use for customer support? Thunderbird uses Zendesk for customer support and documentation, alongside GitBook and Read the Docs, according to runsonwhat (November 2026). runsonwhat found Zendesk through email records that authorize Zendesk and a subdomain, and Thunderbird has used it since at least December 2019. Zendesk is used by 43,437 companies runsonwhat tracks. ### What analytics tools does Thunderbird use? Thunderbird uses Matomo for analytics, according to runsonwhat (November 2026). runsonwhat found Matomo through Matomo code on thunderbird.net. Matomo is used by 35,767 companies runsonwhat tracks. ### What marketing software does Thunderbird use? Thunderbird uses Mailchimp for marketing, according to runsonwhat (November 2026). runsonwhat found Mailchimp through email records that authorize Mailchimp and code on thunderbird.net. Mailchimp is used by 118,533 companies runsonwhat tracks. ### How long has Thunderbird used Amazon CloudFront? Thunderbird has used Amazon CloudFront since at least November 2017, going by the first public certificate of the thunderbird.net subdomain that points at Amazon CloudFront. Other long-running tools at Thunderbird include GitBook (since March 2019), WP Engine (since October 2019) and Zendesk (since December 2019). ### Does Thunderbird use jQuery? Yes. runsonwhat found jQuery at Thunderbird through jQuery code on thunderbird.net. jQuery is a Frontend tool used by 927,560 companies runsonwhat tracks. ### Does Thunderbird use AI tools? Yes. runsonwhat has found Anthropic at Thunderbird; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Thunderbird may use more AI tools than these. ### Which companies have a tech stack similar to Thunderbird's? The companies with the stacks most like Thunderbird's are Mozilla, Nextstrain, Pallets and Pasteur Labs (United States), according to runsonwhat (November 2026). Each shares 3 to 13 tools with Thunderbird, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Thunderbird uses? runsonwhat reads public records only. Of the 23 tools at Thunderbird, 11 were found through DNS records, 5 through email records, 5 through subdomains that point at the vendor and 2 through code on thunderbird.net. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and thunderbird.net about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/thunderbird.net (updated November 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.