What does Taxfix use?

As of October 2026, runsonwhat has found 43 tools at Taxfix (taxfix.de) in public records. Edge & Hosting: Cloudflare. Application: React, Next.js and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, Meta Pixel and Microsoft Ads. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 20, 2026.

Taxfix uses Microsoft 365 for email and office software, alongside Google Workspace and Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 709,032 companies runsonwhat tracks.

Taxfix uses Zendesk for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records, and Taxfix has used it since at least September 2023. Zendesk is used by 41,612 companies runsonwhat tracks.

Taxfix uses Google Analytics for analytics, alongside Google Tag Manager, Segment and Mixpanel, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on taxfix.de. Google Analytics is used by 875,259 companies runsonwhat tracks.

Taxfix uses Mailchimp for marketing, alongside Trustpilot, according to runsonwhat (October 2026). runsonwhat found Mailchimp through Mailchimp code on taxfix.de. Mailchimp is used by 114,680 companies runsonwhat tracks.

Taxfix uses Sentry for monitoring, according to runsonwhat (October 2026). runsonwhat found Sentry through Sentry code on taxfix.de. Sentry is used by 78,271 companies runsonwhat tracks.

Taxfix has used Zendesk since at least September 2023, going by the first public certificate of the taxfix.de subdomain that points at Zendesk.

Yes. runsonwhat found Cloudflare at Taxfix through DNS records that point at Cloudflare and code on taxfix.de. Cloudflare is a CDN & Edge tool used by 701,284 companies runsonwhat tracks.

Yes. runsonwhat has found Anthropic and OpenAI at Taxfix; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Taxfix may use more AI tools than these.

The companies with the stacks most like Taxfix's are Optimizely, OpenAI, Kin Insurance and Fubo, according to runsonwhat (October 2026). Each shares 16 to 31 tools with Taxfix, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

runsonwhat reads public records only. Of the 43 tools at Taxfix, 24 were found through DNS records, 14 through code on taxfix.de, 3 through email records and 2 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and taxfix.de about monthly.