# What does Onlyoffice use? Onlyoffice (onlyoffice.com) shows public evidence of 27 tools, according to runsonwhat (last checked 2026-10-20). - Industry: IT Services - Size: 51–200 employees - Based in: Riga, Latvia - Founded: 2008 - LinkedIn: https://www.linkedin.com/company/ascensio-system-sia ## Edge & Hosting | Tool | Category | Evidence | Since | |---|---|---|---| | [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code | | | [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Website code | | | [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records | | | [Amazon CloudFront](https://www.runsonwhat.com/reverse/cloudfront) | CDN & Edge | Website code | | | [CDN77](https://www.runsonwhat.com/reverse/cdn77) | CDN & Edge | Custom domain | | ## Application | Tool | Category | Evidence | Since | |---|---|---|---| | [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code | | | [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code | | | [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records | | ## Data & Observability | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code | | | [Google Tag Manager](https://www.runsonwhat.com/reverse/gtm) | Analytics | Website code | | | [Microsoft Clarity](https://www.runsonwhat.com/reverse/clarity) | Analytics | Website code | | ## Go-to-market | Tool | Category | Evidence | Since | |---|---|---|---| | [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code | | | [Microsoft Ads](https://www.runsonwhat.com/reverse/bing-ads) | Ads & Pixels | Website code | | | [Mailchimp](https://www.runsonwhat.com/reverse/mailchimp) | Marketing | Website code | | | [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Email records, Website code | | | [ChatGPT Ads](https://www.runsonwhat.com/reverse/chatgpt-ads) | Ads & Pixels | Website code | | | [MailerLite](https://www.runsonwhat.com/reverse/mailerlite) | Marketing | Email records | | | [Discord](https://www.runsonwhat.com/reverse/discord) | Support & Docs | Website code | | | [G2](https://www.runsonwhat.com/reverse/g2) | Marketing | Website code | | | [Rewardful](https://www.runsonwhat.com/reverse/rewardful) | Marketing | Website code | | ## Company Ops | Tool | Category | Evidence | Since | |---|---|---|---| | [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | DNS verification records | | | [Apple Business](https://www.runsonwhat.com/reverse/apple) | Workspace | DNS verification records | | | [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records, Website code | | | [Mailchimp Transactional](https://www.runsonwhat.com/reverse/mandrill) | Email Delivery | Email records | | | [Zoom](https://www.runsonwhat.com/reverse/zoom) | Collaboration | DNS verification records | | | [hCaptcha](https://www.runsonwhat.com/reverse/hcaptcha) | Security & Compliance | Website code | | ## FAQ ### What tools does Onlyoffice use? As of October 2026, runsonwhat has found 27 tools at Onlyoffice (onlyoffice.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: React, Next.js and Anthropic. Data & Observability: Google Analytics, Google Tag Manager and Microsoft Clarity. Go-to-market: Google Ads, Microsoft Ads and Mailchimp. Company Ops: Microsoft 365, Apple Business and Amazon SES. Last checked October 20, 2026. ### What cloud does Onlyoffice run on? Onlyoffice uses Amazon Web Services for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on onlyoffice.com. Amazon Web Services is used by 145,625 companies runsonwhat tracks. ### What email provider does Onlyoffice use? Onlyoffice uses Microsoft 365 for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 710,129 companies runsonwhat tracks. ### What does Onlyoffice use for customer support? Onlyoffice uses Zendesk for customer support and documentation, alongside Discord, according to runsonwhat (October 2026). runsonwhat found Zendesk through email records that authorize Zendesk and code on onlyoffice.com. Zendesk is used by 41,786 companies runsonwhat tracks. ### What analytics tools does Onlyoffice use? Onlyoffice uses Google Analytics for analytics, alongside Google Tag Manager and Microsoft Clarity, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on onlyoffice.com. Google Analytics is used by 878,780 companies runsonwhat tracks. ### What marketing software does Onlyoffice use? Onlyoffice uses Mailchimp for marketing, alongside MailerLite, G2 and Rewardful, according to runsonwhat (October 2026). runsonwhat found Mailchimp through Mailchimp code on onlyoffice.com. Mailchimp is used by 114,934 companies runsonwhat tracks. ### Does Onlyoffice use Cloudflare? Yes. runsonwhat found Cloudflare at Onlyoffice through Cloudflare code on onlyoffice.com. Cloudflare is a CDN & Edge tool used by 702,620 companies runsonwhat tracks. ### Does Onlyoffice use AI tools? Yes. runsonwhat has found Anthropic at Onlyoffice; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Onlyoffice may use more AI tools than these. ### Which companies have a tech stack similar to Onlyoffice's? The companies with the stacks most like Onlyoffice's are Datapacket, Kerio Technologies, The Centos Project and Burda, according to runsonwhat (October 2026). Each shares 4 to 8 tools with Onlyoffice, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices. ### How does runsonwhat know what Onlyoffice uses? runsonwhat reads public records only. Of the 27 tools at Onlyoffice, 16 were found through code on onlyoffice.com, 6 through DNS records, 4 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and onlyoffice.com about monthly. --- Source: runsonwhat, https://www.runsonwhat.com/company/onlyoffice.com (updated October 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.