Calltree's tech stack
What does Calltree use?
Calltree (calltree.ai) uses at least 12 tools we can see from public records, including Vercel for hosting, Microsoft 365 for email and documents, RB2B for sales and Google Analytics for analytics. Last checked .
“Enterprise-grade AI support reps for call centers”
- Industry
- B2B
- Size
- 11–50 employees
- Based in
- San Francisco, United States
- Company page
- Tools found
- 12
- Categories
- 9
- Layers
- 5 of 5
- Last checked
- Oct 2026
Calltree'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
1 tool, what the product is built with
Media & UI
Data & Observability
2 tools, what they measure and store
Go-to-market
2 tools, how they find and keep customers
Marketing
Sales & CRM
Company Ops
3 tools, what the team runs on day to day
Security & Compliance
Companies like Calltree also use
Tools common among companies with a similar stack that we haven't found at Calltree.
Companies with a stack like Calltree's
Ranked by shared tools, with rare tools counting more.
TheraB2B · 11–50 people9in common
ArtosB2B · 1–10 people9in common
FeatherB2B · 1–10 people8in common
OsmosisB2B · 1–10 people7in common
OpenChat, Inc.Engineering, Product and Design · 11–50 people8in common
ReformSupply Chain and Logistics · 11–50 people8in common
SendblueE-commerce · 11–50 people9in common
Solve IntelligenceLegal · 11–50 people7in common
More B2B companies
Other B2B companies we've checked.
Calltree tech stack FAQ
What tools does Calltree use?
As of October 2026, runsonwhat has found 12 tools at Calltree (calltree.ai) in public records. Edge & Hosting: GoDaddy, Amazon Route 53 and Amazon CloudFront. Application: Google Fonts. Data & Observability: Google Analytics and PostHog. Go-to-market: RB2B. Company Ops: Microsoft 365, Google Workspace and Oneleet. Last checked October 9, 2026.
What cloud does Calltree run on?
Calltree uses Vercel for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Vercel through a DNS verification record for Vercel. Vercel is used by 46,361 companies runsonwhat tracks.
What sales tools does Calltree use?
The sales tools runsonwhat has found at Calltree are RB2B (October 2026); no CRM shows up in Calltree's public records. runsonwhat found RB2B through RB2B code on calltree.ai. RB2B is used by 2,671 companies runsonwhat tracks.
What email provider does Calltree use?
Calltree 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 and email records. Microsoft 365 is used by 700,620 companies runsonwhat tracks.
What analytics tools does Calltree use?
Calltree uses Google Analytics for analytics, alongside PostHog, according to runsonwhat (October 2026). runsonwhat found Google Analytics through Google Analytics code on calltree.ai. Google Analytics is used by 850,482 companies runsonwhat tracks.
Does Calltree use Google Fonts?
Yes. runsonwhat found Google Fonts at Calltree through Google Fonts code on calltree.ai. Google Fonts is a Media & UI tool used by 789,837 companies runsonwhat tracks.
Which companies have a tech stack similar to Calltree's?
The companies with the stacks most like Calltree's are Thera, Artos, Feather and Osmosis, according to runsonwhat (October 2026). Each shares 7 to 9 tools with Calltree, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what Calltree uses?
runsonwhat reads public records only. Of the 12 tools at Calltree, 5 were found through DNS records, 4 through code on calltree.ai, 2 through subdomains that point at the vendor and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and calltree.ai 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.