Sandboxx

Sandboxx

Digital to physical mail for troops

Overview

Sandboxx offers a digital platform that connects the US military community with tools for communication, travel, finance, and career resources, anchored by its Letters service. The Letters service lets family and friends type a message with a photo on a phone, which Sandboxx prints and delivers as a physical letter to a military base, including basic training sites, with a return envelope for replies. The platform also provides military-focused travel and financial resources, all accessible through one app. Its goal is to keep service members and their families connected and supported through recruitment, active duty, and transition by providing practical, base-friendly solutions.

About Sandboxx

Simplify's Rating
Why Sandboxx is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Consumer Software

Social Impact

Financial Services

Company Size

51-200

Company Stage

Late Stage VC

Total Funding

$16.5M

Headquarters

Arlington, Virginia

Founded

2012

Simplify Jobs

Simplify's Take

What believers are saying

  • Air Force partnership expands to Army, Navy, Marines for user growth.
  • $8M funding from T-Mobile VC accelerates platform development.
  • Veteran transition services capture rising post-service demand.

What critics are saying

  • USPS delays erode next-day delivery promise within 12 months.
  • DoD mandates official app, displacing Sandboxx in 18 months.
  • Declining recruitment shrinks core letter-sending market by 2028.

What makes Sandboxx unique

  • Sandboxx prints and delivers physical letters next-day to U.S. military bases.
  • Co-founded in 2013 by Sam Meek and Major General Ray Smith.
  • Partners with Air Force BMT for recruit-family communication.

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Funding

Total Funding

$16.5M

Below

Industry Average

Funded Over

4 Rounds

Late VC funding comparison data is currently unavailable. We're working to provide this information soon!
Late VC Funding Comparison
Coming Soon

Benefits

401(k) Retirement Plan

401(k) Company Match

Health Insurance

Family Benefits

Flexible Paid Vacation

Paid Parental Leave

Relocation Assistance

Remote Work Options

Hybrid Work Options

Unlimited Paid Time Off

Paid Vacation

Gym Membership

Wellness Program

Mental Health Support

Phone/Internet Stipend

Home Office Stipend

Stock Options

Company Equity

Conferences Attendance Budget

Professional Development Budget

Tuition Reimbursement

Adoption Assistance

Childcare Support

Pet Insurance

Sabbatical Leave

Commuter Benefits

Life Insurance

Disability Insurance

Dental Insurance

Vision Insurance

Meal Benefits

Employee Discounts

Professional Certification Support

Mentorship Program

Training Programs

Legal Services

Relocation Assistance

Growth & Insights and Company News

Headcount

6 month growth

-3%

1 year growth

-1%

2 year growth

0%
Sandboxx
Feb 6th, 2026
New frontiers in anti-drone munitions were on display at SHOT Show 2026

New frontiers in anti-drone munitions were on display at SHOT Show 2026. Cheap and disposable drones have proven to be effective as anti-armor and anti-personnel weapons, and as quick and fast recon elements. Their proliferation isn't slowing down either thanks to their wide-scale production and affordability thus making them a serious concern for any infantry force. Therefore, a number of anti-drone munitions are being developed to counter drone threats - and at SHOT Show 2026 expo, Sandboxx News had the opportunity to see three new dedicated anti-drone munitions. Drone Round Defense's purpose-built rounds for standard platforms. A lot of anti-drone solutions at the infantry level require a specific weapon system - be it a shotgun or electronic warfare measure - to be used. In a kinetic environment, that can be difficult to constantly manage for troops. However, the Drone Round Defense company is changing the game by introducing purpose-built rounds designed to be fired from standard rifles and machine guns. These are 5.56 and 7.62 NATO cartridges that fragment as they are fired. The K variant turns into eight small projectiles and the L variant turns into five slightly large projectiles. The rounds are belt-fed and suppressor-compatible and do not require any changes to the firing platform to be used. Instead, a user can simply swap magazines or belts and fire the on-demand, anti-drone munition. This simplifies logistics, and, since they are fired from semi-auto and automatic platforms, also allows for fast follow-up shots. The K rounds have an effective range of 55 yards (or 50 meters) and the L variant of 100 yards (or 91 meters). The rounds can also destroy fiber wires for wired drones. Norma's AD-LER shotgun rounds. AD-LER stands for Anti-Drone - Long Effective range and is a modern spin on anti-drone shotgun munitions. Developed by the Swedish company Norma, these rounds are essentially a high-tech, long-range birdshot and utilize around 350 tungsten pellets to fill the sky with shot. The AD-LER rounds can work with any 12-gauge shotgun. They are firing No. 6 shot with a case length of 2.75 inches. Their velocity is around 1,325 feet per second and their overall effective range 110 yards (or 100 meters). Tungsten is denser and harder than steel, which allows the pellets to retain their velocity and punch at greater distances. These tungsten pellets also offer more penetrating power to deal with purpose-built ruggedized drones. They can rupture aluminum, carbon fiber, and plastic, turning delicate electronics into scrap material. The AD-LER rounds are designed around the Benelli M4 A.I. Drone Guardian, a specialized semi-auto shotgun designed for anti-drone warfare. The mass amount of shot fired per round creates what's essentially a net of ammo to hit fast moving drones. Maverick's Skynet anti-drone net. Maverick's Skynet system is designed for dense urban environments where missed shots could cause casualties. The Skynet is a 12-gauge cartridge designed to function with any standard 12-gauge shotgun. When fired, the round separates into five tethered projectiles that are connected to a high-strength ballistic fiber. There are two variants: the single shot and double shot. The single shot fires a five foot wide net. The double shot fires two nets, one 14 inches and another 24 inches wide. The net tangles the drone up, causing it to crash. The tethered projectiles vary in material. The zinc option has an effective range of 320 feet, whereas the tungsten and lead options offer 420 feet. In the event of a miss, the system deploys a parachute to slow the projectiles and net down as they descend to avoid unintended casualties. The SkyNet system could be employed by both civilian law enforcement and military forces to protect sensitive areas and installations. Counter-drone measures will have to become a part of any successful military strategy. While there are plenty of high-tech solutions, the old infantry method of shooting lead, or tungsten, at them will still be the most common.

37th Training Wing
Feb 14th, 2025
New app helps expedite communication with BMT trainees

The Department of the Air Force's Basic Military Training has partnered with Sandboxx, a digital platform, as a way to facilitate communication and increase engagement between trainees and their loved ones during what can otherwise be seen as stressful time.

FinSMEs
Dec 13th, 2021
Sandboxx Raises $8M in Growth Funding

Sandboxx, a Washington, DC —  based platform navigating military life, closed an $8M growth funding round

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