Insights

Strong growth High revenue scale and rapid growth trajectory supported by a $357M funding round and Inc. 5000 recognition indicate expanding budget and readiness to invest in comprehensive public safety software.

Public safety focus End-to-end all-in-one platform for Fire and EMS agencies positions First Due to win multi-department contracts and expand footprint across U.S. and Canada, with opportunities to upsell modules like incident command and community engagement.

Strategic partnerships Recent investments from JMI Equity and participation from TCV and Serent Capital, along with NextNav integration, show a strategic push toward enterprise-scale deployments; use this to position for larger districts and multi-agency deals.

Technology leverage Cloud-based platform with integration capability and advanced location tech (NextNav) aligns with agencies upgrading digital infrastructure; target agencies seeking modern, unified software stacks and GIS-enabled incident response.

Market expansion Recognition by GovTech 100 and partnerships with training and media ecosystems suggest a network-curated growth path; identify opportunities with larger regional consortia and fire academy-led training programs for bundled adoption.

First Due Tech Stack

First Due uses 8 technology products and services including Tableau, Gong, Zendesk, and more. Explore First Due's tech stack below.

Tableau

Business Intelligence

Gong

Customer Data Platforms

Zendesk

Documentation Tools

Postfix

Email Hosting

ISO/IEC 27001

Governance, Risk And Compliance

Online Community Software

Webflow

Page Builders

Salesloft

Sales Enablement

First Due Email Formats	Example	Percentage
First.Last@firstdue.com	John.Doe@firstdue.com	81%
First@firstdue.com	John@firstdue.com	10%
FirstLast@firstdue.com	JohnDoe@firstdue.com	8%
FLast@firstdue.com	JDoe@firstdue.com	1%

First Due Email Formats

Example

Percentage

First.Last@firstdue.com

John.Doe@firstdue.com

81%

First@firstdue.com

John@firstdue.com

10%

FirstLast@firstdue.com

JohnDoe@firstdue.com

FLast@firstdue.com

JDoe@firstdue.com

Frequently Asked Questions

What is First Due's phone number?

You can contact First Due's main corporate office by phone at

+1-917-692-****

. 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 First Due's official website and social media links?

First Due's official website is firstdue.com and has social profiles on LinkedIn Crunchbase.

What is First Due's NAICS code?

First Due's NAICS code is 5112 - Software Publishers.

How many employees does First Due have currently?

As of July 2026, First Due has approximately 501 employees across 5 continents, including North AmericaAsiaSouth America. Key team members include Chief Customer Officer: A. S.Vice President Marketing: R. K.Co-Founder, Coo & Head Of Product: R. E.. Explore First Due's employee directory with LeadIQ.

What industry does First Due belong to?

First Due operates in the Software Development industry.

What technology does First Due use?

First Due's tech stack includes TableauGongZendeskPostfixISO/IEC 27001LinkedInWebflowSalesloft.

What is First Due's email format?

First Due's email format typically follows the pattern of First.Last@firstdue.com. Find more First Due email formats with LeadIQ.

How much funding has First Due raised to date?

As of July 2026, First Due has raised $357M in funding. The last funding round occurred on Aug 05, 2025 for $355M.

When was First Due founded?

First Due was founded in 2016.

First Due

Q: What is First Due's official website and social media links?

First Due's official website is firstdue.com. First Due has social profiles on LinkedIn.

Q: How many employees does First Due have currently?

First Due has approximately 501 employees.

Q: What technology does First Due use?

First Due's tech stack includes GitHub, Claude by Anthropic, Salesloft, GDPR, Google Tag Manager.

Q: What is First Due's NAICS code?

First Due's NAICS code is 5112 (Software Publishers).

Software DevelopmentNew York, United States501-1000 Employees

First Due is a software development company headquartered in Garden City, New York, with a workforce of 201 to 500 employees. The company offers the First Due Suite, a cloud-based platform for Fire and EMS agencies that combines Pre-Planning, Fire Prevention, Incident Reporting, Scheduling and Personnel, Assets and Inventory, Community Engagement, and Response functionalities. The platform is designed to support operations before, during, and after incidents, enabling better decision-making and safer communities. First Due serves public safety agencies across the United States and Canada, including more than 3,000 agencies and 300,000 users. In 2025, First Due Size-Up was recognized on the Inc. 5000 list of fastest-growing private companies.

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First Due Tech Stack

Media & News

Clarion Events Fire & Rescue Group partners with First Due Size-Up.

First Due Size-Up identified as competitor of StationReady.

First Due Size-Up recognized as #1 Fire & EMS Software Company by Inc. 5000.

First Due Size-Up recognized as Inc. 5000.

First Due Size-Up received financing of $355M in strategic minority growth investment on Aug 5th '25.

JMI Management, Inc. invested into First Due Size-Up $355M in strategic minority growth investment on Aug 7th '25.

NextNav LLC integrates with First Due Size-Up.

First Due's Email Address Formats