1st90's tech stack
What does 1st90 use?
1st90 (1st90.com) uses at least 14 tools we can see from public records, including Amazon Web Services for hosting, Microsoft 365 for email and documents, Calendly for sales and Squarespace for its website. Last checked .
- Industry
- Software
- Size
- 11–50 employees
- Based in
- San Francisco, United States
- Founded
- 2018
- Company page
- Tools found
- 14
- Categories
- 10
- Layers
- 4 of 5
- Last checked
- Oct 2026
1st90'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
6 tools, where the bytes are served from
Hosting & Cloud
CDN & Edge
Application
1 tool, what the product is built with
Go-to-market
4 tools, how they find and keep customers
Website & CMS
Sales & CRM
Company Ops
3 tools, what the team runs on day to day
Companies like 1st90 also use
Tools common among companies with a similar stack that we haven't found at 1st90.
Companies with a stack like 1st90's
Ranked by shared tools, with rare tools counting more.
Legion HealthConsumer Health and Wellness · 11–50 people4in common
ModashSoftware · 11–50 people7in common
Resnet AI Inc.Software · 11–50 people5in common
Zavvy By DeelSoftware · 11–50 people5in common
DoceboSoftware · 201–1,000 people6in common
Alô Alô Bahia LTDAOnline Media · 11–50 people2in common
Codeship (acquired By Cloudbees)IT Services · 11–50 people5in common
Neural Alpha LtdFintech · 11–50 people4in common
More Software companies
Other Software companies we've checked.
1st90 tech stack FAQ
What tools does 1st90 use?
As of October 2026, runsonwhat has found 14 tools at 1st90 (1st90.com) in public records. Edge & Hosting: Cloudflare, GoDaddy and Amazon Web Services. Go-to-market: Squarespace, Calendly and beehiiv. Company Ops: Microsoft 365, SendGrid and Oneleet. Last checked October 10, 2026.
What cloud does 1st90 run on?
1st90 uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud and Render, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 145,081 companies runsonwhat tracks.
What sales tools does 1st90 use?
The sales tools runsonwhat has found at 1st90 are Calendly (October 2026); no CRM shows up in 1st90's public records. runsonwhat found Calendly through Calendly code on 1st90.com. Calendly is used by 24,974 companies runsonwhat tracks.
What email provider does 1st90 use?
1st90 uses Microsoft 365 for email and office software, according to runsonwhat (October 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 705,065 companies runsonwhat tracks.
What is 1st90's website built with?
1st90 uses Squarespace for its website, according to runsonwhat (October 2026). runsonwhat found Squarespace through Squarespace code on 1st90.com. Squarespace is used by 33,413 companies runsonwhat tracks.
What marketing software does 1st90 use?
1st90 uses beehiiv for marketing, according to runsonwhat (October 2026). runsonwhat found beehiiv through beehiiv code on 1st90.com. beehiiv is used by 547 companies runsonwhat tracks.
Does 1st90 use Cloudflare?
Yes. runsonwhat found Cloudflare at 1st90 through Cloudflare code on 1st90.com. Cloudflare is a CDN & Edge tool used by 695,270 companies runsonwhat tracks.
Which companies have a tech stack similar to 1st90's?
The companies with the stacks most like 1st90's are Legion Health, Modash, Resnet AI and Zavvy By Deel, according to runsonwhat (October 2026). Each shares 4 to 7 tools with 1st90, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.
How does runsonwhat know what 1st90 uses?
runsonwhat reads public records only. Of the 14 tools at 1st90, 4 were found through code on 1st90.com, 4 through subdomains that point at the vendor, 3 through DNS records, 2 through email records and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and 1st90.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.