Insights

Substitute staffing focus Sub Teacher Source specializes in educational staffing for substitute teachers across public, private, and charter schools, presenting a clear targeting opportunity for school districts seeking reliable coverage solutions.

Tech driven efficiency Their state of the art absence management system and technology stack (HubSpot analytics, PHP, Java, and cloud services) indicate potential to scale outreach, automate outreach workflows, and measure placement performance for upsell of premium services.

Mid-market footprint With 201-500 employees and U.S. headquarters in Michigan, STS sits in the mid-market segment, suggesting growth opportunities with regional school districts and multi-site charter networks seeking scalable staffing partners.

Revenue potential Reported revenue of 50M to 100M signals a mature operation with room to expand services such as long-term substitute programs, professional development add-ons for substitutes, or expanded coverage in neighboring states.

Competitive positioning Compared to large staffing incumbents, STS’s focused niche in education staffing and loyal execution posture can be leveraged to propose value-driven partnerships, bundled offerings, and differentiated service levels to districts prioritizing reliability.

Sub Teacher Source Tech Stack

Sub Teacher Source uses 8 technology products and services including Azure Monitor, jsDelivr, HubSpot Content Hub, and more. Explore Sub Teacher Source's tech stack below.

  • Azure Monitor
    Analytics
  • jsDelivr
    Content Delivery Network
  • HubSpot Content Hub
    Content Management System
  • Raphael
    Javascript Graphics
  • Floating UI
    Javascript Libraries
  • Cloudflare Bot Management
    Security
  • HSTS
    Security
  • Google Tag Manager
    Tag Management

Sub Teacher Source's Email Address Formats

Sub Teacher Source uses at least 2 format(s):
Sub Teacher Source Email FormatsExamplePercentage
First@isscompanies.comJohn@isscompanies.com
87%
FLast@isscompanies.comJDoe@isscompanies.com
13%

Frequently Asked Questions

What is Sub Teacher Source's phone number?

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You can contact Sub Teacher Source's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Sub Teacher Source's official website and social media links?

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Sub Teacher Source's official website is subteachersource.com and has social profiles on LinkedIn.

How much revenue does Sub Teacher Source generate?

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As of August 2026, Sub Teacher Source's annual revenue is estimated to be $50M - $100M.

What is Sub Teacher Source's NAICS code?

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Sub Teacher Source's NAICS code is 92311 - Administration of Education Programs.

How many employees does Sub Teacher Source have currently?

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As of August 2026, Sub Teacher Source has approximately 277 employees across 2 continents, including North AmericaAsia. Key team members include Substitute Lead Teacher: L. M.Temporary Substitute Teacher: E. T.Substitute Teacher: J. C.. Explore Sub Teacher Source's employee directory with LeadIQ.

What industry does Sub Teacher Source belong to?

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Sub Teacher Source operates in the Education Administration Programs industry.

What technology does Sub Teacher Source use?

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Sub Teacher Source's tech stack includes Azure MonitorjsDelivrHubSpot Content HubRaphaelFloating UICloudflare Bot ManagementHSTSGoogle Tag Manager.

What is Sub Teacher Source's email format?

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Sub Teacher Source's email format typically follows the pattern of First@isscompanies.com. Find more Sub Teacher Source email formats with LeadIQ.

When was Sub Teacher Source founded?

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Sub Teacher Source was founded in 2016.
Sub Teacher Source logo

Sub Teacher Source

Education Administration ProgramsMichigan, United States201-500 Employees

Sub Teacher Source is a mid-sized educational staffing firm that connects substitute teachers with K-12 schools in need, including public, private, and charter institutions. It operates in the education administration sector and relies on an absence management system to streamline the process of replacing regular teachers when absences occur. The company is based in Southfield, Michigan. 

Its customers are schools seeking reliable substitute coverage to maintain instructional continuity. By facilitating connections between schools and substitute teachers, Sub Teacher Source addresses staffing gaps and absence management needs within the educational landscape. More information is available on its website.

Section iconCompany Overview

Phone number
NAICS Code
92311 - Administration of Education Programs
Founded
2016
Employees
201-500

Section iconFunding & Financials

  • $50M - $100M

    Sub Teacher Source's revenue is estimated to be in the range of $50M - $100M

Section iconFunding & Financials

  • $50M - $100M

    Sub Teacher Source's revenue is estimated to be in the range of $50M - $100M

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