Yellow's tech stack
What does Yellow use?
Yellow (yellow.systems) uses at least 27 tools we can see from public records, including Google Cloud for hosting, Microsoft 365 for email and documents, Calendly for sales and WhatsApp Business for customer support. Last checked .
“✔ We provide software development services for startups and businesses. ✔ Reach out for a free consultation!”
- Industry
- Software
- Size
- 51–200 employees
- Based in
- San Francisco, United States
- Founded
- 2015
- Company page
- Tools found
- 27
- Categories
- 15
- Layers
- 5 of 5
- Last checked
- Oct 2026
Yellow'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
4 tools, where the bytes are served from
Application
4 tools, what the product is built with
Data & Observability
4 tools, what they measure and store
Monitoring
Go-to-market
12 tools, how they find and keep customers
Website & CMS
Support & Docs
Company Ops
3 tools, what the team runs on day to day
Email Delivery
Companies like Yellow also use
Tools common among companies with a similar stack that we haven't found at Yellow.
Companies with a stack like Yellow's
Ranked by shared tools, with rare tools counting more.
Stafferstaffer.ai12in common
StafferHuman Resources · 201–1,000 people13in common
AgmatixSoftware · 51–200 people9in common
KnotchSoftware · 51–200 people14in common
RoboRanaSoftware · 51–200 people10in common
eventyrSoftware · 51–200 people5in common
HunchSoftware · 51–200 people14in common
My Virtual MateStaffing and Recruiting · 51–200 people11in common
More Software companies
Other Software companies we've checked.
Yellow tech stack FAQ
What tools does Yellow use?
As of October 2026, runsonwhat has found 27 tools at Yellow (yellow.systems) in public records. Edge & Hosting: Cloudflare, Google Cloud and Heroku. Application: React, Next.js and Three.js. Data & Observability: Google Analytics, Google Tag Manager and Sentry. Go-to-market: Google Ads, Meta Pixel and WhatsApp Business. Company Ops: Microsoft 365, Google Workspace and Mailchimp Transactional. Last checked October 7, 2026.
What cloud does Yellow run on?
Yellow uses Google Cloud for hosting and cloud infrastructure, alongside Heroku, according to runsonwhat (October 2026). runsonwhat found Google Cloud through a subdomain that points at Google Cloud. Google Cloud is used by 74,967 companies runsonwhat tracks.
What sales tools does Yellow use?
The sales tools runsonwhat has found at Yellow are Calendly, Dealfront and Snitcher (October 2026); no CRM shows up in Yellow's public records. runsonwhat found Calendly through Calendly code on yellow.systems.
What email provider does Yellow use?
Yellow uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through a DNS verification record for Microsoft 365. Microsoft 365 is used by 700,543 companies runsonwhat tracks.
What does Yellow use for customer support?
Yellow uses WhatsApp Business for customer support and documentation, according to runsonwhat (October 2026). runsonwhat found WhatsApp Business through WhatsApp Business code on yellow.systems. WhatsApp Business is used by 132,620 companies runsonwhat tracks.
What analytics tools does Yellow use?
Yellow uses Google Analytics for analytics, alongside Google Tag Manager and Hotjar, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on yellow.systems. Google Analytics is used by 849,225 companies runsonwhat tracks.
Does Yellow use Cloudflare?
Yes. runsonwhat found Cloudflare at Yellow through Cloudflare code on yellow.systems. Cloudflare is a CDN & Edge tool used by 691,225 companies runsonwhat tracks.
Which companies have a tech stack similar to Yellow's?
The companies with the stacks most like Yellow's are Staffer, Staffer, Agmatix and Knotch, according to runsonwhat (October 2026). Each shares 9 to 14 tools with Yellow, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what Yellow uses?
runsonwhat reads public records only. Of the 27 tools at Yellow, 18 were found through code on yellow.systems, 4 through DNS records, 2 through email records, 2 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and yellow.systems 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.