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Technologies / Slack / Squarespace

Companies using Slack and Squarespace

7 companies in our data have public evidence for both Slack and Squarespace, and 6 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

7companies use both
under 1%of Slack users
37%of Squarespace users
6name both as subprocessors

Companies using one are 4.5 times as likely as the average company in our data to show evidence of the other.

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanySlackSquarespace
Chassichassi.comChassi models a company's Lead-to-Cash process by connecting and reconciling data across CRMs, ERPs, billing platforms, and contracts.Data and analyticsFinance and accounting software
Eventuallyeventuallyticketing.comEventually is a Squarespace extension for selling event tickets through a customer's own site, with checkout running through Squarespace Commerce and a flat monthly subscription instead of per-ticket fees.
Fonn Groupfonngroup.comFonn Group offers cloud-based production tools, storycentric journalistic tools, and cloud-native graphics, along with project, workflow and software integration.
Moonbouncemoonbounce.aiMoonbounce provides a decision engine that judges AI prompts, outputs, and tool calls against a company's policy and allows, blocks, rewrites, escalates, or labels them before they reach users.AI and machine learning
Nerd Lawyer Entrepreneur Servicesnerdlawyer.aiNerd Lawyer provides legal infrastructure services for companies, including formation, patent and trademark counsel, revenue contracting, and investor readiness.LegalConsulting and services
Relay Commercerelaycommerce.ioRelay provides an ecosystem of Shopify apps and expertise for e-commerce, covering popups, email/SMS, package protection, subscriptions, and predictive flows.E-commerce
Juice Analyticsjuiceanalytics.comJuice builds white-labeled outcome reports and data products that turn a company's data into stories proving ROI to its customers.Data and analytics

The two technologies

Slack

by Salesforce · Productivity

Slack is a collaboration platform where teams chat, share files, and work together in channels. It is used for team communication, connecting apps and agents, and automating everyday work.

Summarized from slack.com on 8 Nov 2026.

under 1% of the 1,936 companies we see using Slack also show the other.

All 1,936 companies using Slack1,343 name it as a subprocessorMore in Productivity

Squarespace

Websites and CMS

Squarespace is a platform that offers websites, website templates, an AI website builder, ecommerce, portfolios, blogs, analytics, online stores, invoicing, scheduling, email campaigns, SMS campaigns, SEO tools, domain search, domain transfer and business email. It is used to create personalized websites and to manage and grow a business online.

Summarized from squarespace.com on 8 Nov 2026.

37% of the 19 companies we see using Squarespace also show the other.

All 19 companies using Squarespace11 name it as a subprocessorMore in Websites and CMS

Other pairs

Companies with their own evidence for both.

More with Slack

Cloudflare1,813companiesGoogle Workspace1,580companiesAmazon Web Services1,298companiesStripe896companiesGoogle Tag Manager880companiesGoogle810companies

More with Squarespace

Cloudflare19companiesGoogle Workspace16companiesAmazon Web Services12companiesGoogle Analytics12companiesGoogle7companiesIntercom7companies

Questions

How many companies use both Slack and Squarespace?

7 companies in StrataDB's data have public evidence for both, and 6 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use Slack and Squarespace?

Chassi, Eventually, Fonn Group, Moonbounce and Nerd Lawyer Entrepreneur Services, and 2 more companies. Each one links to the evidence behind it.

How does StrataDB know a company uses Slack and Squarespace?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using Slack and Squarespace

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • Every company and vendor, with its public source
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