Resend's tech stack
What does Resend use?
Resend (resend.com) uses at least 29 tools we can see from public records, including Amazon Web Services for hosting, Google Workspace for email and documents, Attio for sales and Mintlify for customer support. Last checked .
“Email API for developers”
- Industry
- Communication
- Size
- 11–50 employees
- Based in
- San Francisco, United States
- Founded
- 2023
- Company page
- Tools found
- 29
- Categories
- 16
- Oldest proven tool
- Dec 2022
- Last checked
- Oct 2026
Resend's stack, layer by layer
Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.
Edge & Hosting
5 tools, where the bytes are served from
Hosting & Cloud
CDN & Edge
Application
9 tools, what the product is built with
Payments & Billing
Media & UI
Data & Observability
3 tools, what they measure and store
Monitoring
Analytics
Go-to-market
5 tools, how they find and keep customers
Company Ops
7 tools, what the team runs on day to day
Collaboration
Dev Tools
Security & Compliance
What changed at Resend
Using since
Dates come from the first certificate of the subdomain that points at the tool.
Companies like Resend also use
Tools common among companies with a similar stack that we haven't found at Resend.
Companies with a stack like Resend's
Ranked by shared tools, with rare tools counting more.
Bird B.V.Telecommunications · 201–1,000 people13in common
InterfereEngineering, Product and Design · 1–10 people12in common
MintlifyEngineering, Product and Design · 51–200 people15in common
LaravelSoftware · 11–50 people10in common
Stacksync Inc.Engineering, Product and Design · 11–50 people9in common
CosineB2B · 11–50 people9in common
E2BSoftware11in common
ElevenAPIArtificial Intelligence · 201–1,000 people9in common
Resend tech stack FAQ
What tools does Resend use?
As of October 2026, runsonwhat has found 29 tools at Resend (resend.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Amazon Route 53. Application: React, Tailwind CSS and Next.js. Data & Observability: web-vitals, Datadog and PostHog. Go-to-market: Mintlify, Dub and Attio. Company Ops: Google Workspace, Apple Business and dmarcian. Last checked October 7, 2026.
What cloud does Resend run on?
Resend uses Amazon Web Services for hosting and cloud infrastructure, alongside Vercel, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on resend.com. Amazon Web Services is used by 143,829 companies runsonwhat tracks.
What CRM does Resend use?
Resend uses Attio for its CRM, according to runsonwhat (October 2026). runsonwhat found Attio through a DNS verification record for Attio. Attio is used by 230 companies runsonwhat tracks.
What email provider does Resend use?
Resend uses Google Workspace for email and office software, alongside Apple Business, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on resend.com. Google Workspace is used by 393,361 companies runsonwhat tracks.
What does Resend use for customer support?
Resend uses Mintlify for customer support and documentation, alongside Plain, according to runsonwhat (October 2026). runsonwhat found Mintlify through Mintlify code on resend.com. Mintlify is used by 1,054 companies runsonwhat tracks.
What payment provider does Resend use?
Resend uses Stripe for payments and billing, according to runsonwhat (October 2026). runsonwhat found Stripe through a DNS verification record for Stripe and code on resend.com, and Resend has used it since at least December 2022. Stripe is used by 25,049 companies runsonwhat tracks.
How long has Resend used Cloudflare?
Resend has used Cloudflare since at least December 2022, going by the first public certificate of the resend.com subdomain that points at Cloudflare. Other long-running tools at Resend include Stripe (since December 2022), Vercel (since March 2023) and Dub (since May 2024).
Does Resend use Cloudflare?
Yes. runsonwhat found Cloudflare at Resend through a subdomain that points at Cloudflare, in use since at least December 2022. Cloudflare is a CDN & Edge tool used by 676,169 companies runsonwhat tracks.
Does Resend use AI tools?
Yes. runsonwhat has found Anthropic, Perplexity and Google Gemini at Resend; Anthropic, for example, through a DNS verification record for Anthropic. AI services called only from servers leave no public trace, so Resend may use more AI tools than these.
Which companies have a tech stack similar to Resend's?
The companies with the stacks most like Resend's are Bird, Interfere, Mintlify and Laravel, according to runsonwhat (October 2026). Each shares 10 to 15 tools with Resend, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what Resend uses?
runsonwhat reads public records only. Of the 29 tools at Resend, 11 were found through DNS records, 9 through code on resend.com, 4 through subdomains that point at the vendor, 2 through email records, 2 through its own subprocessor list and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and resend.com about monthly.
We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.