What Square Robot does

Square Robot, Inc. is a privately held Delaware-incorporated robotics company founded in 2016 and headquartered in Westborough, Massachusetts. The company designs and operates autonomous robotic systems for internal inspection of aboveground storage tanks in the oil and gas, chemical, terminal, aviation, power generation, mining, and renewables sectors. Its flagship product, the SR-3 platform, uses a patented navigation system and Phased Array Ultrasonic Testing (PAUT) to perform API 653 and EEMUA 159 compliant internal tank inspections while tanks remain fully in service, eliminating confined space entry and tank downtime. The platform is certified for hazardous-area (C1D1) operation and pairs robotic data capture with structured compliance reporting including Extreme Value Analysis under API 581 and EEMUA 247.

Square Robot monetizes primarily through professional inspection services delivered with the SR-3 platform rather than through hardware sales, with a consultative enterprise field-sales motion targeting large industrial operators. The company has cumulatively inspected more than 400 tanks across 17 countries, claims $170M in customer cost savings and 236,000+ confined-space hours eliminated, and serves verticals including refining, petrochemicals, terminals/midstream, aviation, power generation, mining, and renewables. Its competitive positioning rests on regulatory-grade inspection outputs, on-stream capability that preserves production revenue for tank owners, and high-density datasets that support proactive asset integrity management.

The company has raised approximately $20.5M across four disclosed rounds: a $3M convertible note in December 2022, two $5M rounds in September and November 2023, and a $7.5M Series B in 2025 led by Marathon Petroleum, which also serves as a strategic investor and technical collaboration partner. Square Robot operates with 11–50 employees, maintains no public revenue disclosure, and is venture-backed with no parent company or subsidiaries identified in the available data.

Name

Square Robot

Legal name

Square Robot, Inc.

Website

https://squarerobots.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

Square Robot builds the SR-3 autonomous robotic platform for on-stream internal inspection of aboveground storage tanks, serving refining, petrochemical, terminal, aviation, power, mining, and renewables operators with API 653 and EEMUA 159 compliant inspection services.

Ownership category

akta.pro rank

Product category

Industrial Robotic Tank Inspection Services

NAICS

Testing Laboratories and Services (541380), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513)

SIC

Services-Testing Laboratories (8734), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Industrial Quality Inspection & Metrology (Machine Vision) (IMAIAMAF)

akta.pro secondary industry

Robotics Safety, Certification & Compliance (HDAAAIAO)

Keywords

• Robotic tank inspection
• Autonomous inspection platforms
• Aboveground storage tanks
• Corrosion detection systems
• API 653 compliance

Headquarters

HQ city

Westborough

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Technology or R&D, Personnel, Operations, Supply Chain, Marketing or Sales

Revenue model

1. Robotic Tank Inspection Services: Inspection services using the SR-3 autonomous platform, providing internal tank inspections while tanks remain operational. Revenue derived from service fees for inspection programs across refining, terminals, petrochemicals, aviation, power generation, mining, and renewables industries. Includes data capture, analysis, and compliant reporting.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Square Robot develops and operates the SR-3, an autonomous robotic inspection platform that performs internal inspections of aboveground storage tanks while they remain fully in service. The platform uses patented navigation and phased array ultrasonic testing (PAUT) to deliver API 653 and EEMUA 159-compliant inspection reports for industrial operators in refining, petrochemicals, terminals, aviation, power generation, mining, and renewables sectors. Inspection Services leverage the SR-3 to provide expert data analysis and compliance reporting, eliminating the need for confined space entry, tank shutdown, product removal, cleaning, waste disposal, and degassing.

Product overview

Square Robot offers a single unified product architecture centered on the SR-3 Platform — an autonomous robotic tank inspection system — supplemented by Inspection Services that leverage the SR-3 technology. The SR-3 serves as the core product providing on-stream (without taking tanks offline) internal tank inspections, while the Inspection Services module delivers expert compliance reporting and data analysis. The company also provides complementary tools such as a Product Compatibility List and a Value Calculator for estimating savings.

Differentiator

Problem solved

Functional benefit

Products and services

• SR-3 Platform The SR-3 is an autonomous tank inspection robot platform that delivers API 653 and EEMUA 159-compliant internal tank inspections while tanks remain fully in service. It uses patented navigation technology, phased array ultrasonic testing (PAUT) for corrosion detection, and eliminates the need for confined space entry. Designed for industrial operators with aboveground storage tank fleets in refining, petrochemicals, terminals, aviation, power generation, mining, and renewables sectors.
• Inspection Services Expert inspection services powered by the SR-3 platform, providing API 653 and EEMUA 159 compliant inspections and Extreme Value Analysis reports following API 581 and EEMUA 247 standards. Delivered to industrial tank operators across refining, petrochemicals, terminals, aviation, power generation, mining, and renewables sectors.

Quantifiable outcome

• 400+ tanks inspected globally
• +5 more outcomes

Named customers1 record

Segments7 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Diakont: Diakont provides robotic inspection services and NDT tooling for aboveground storage tanks, including in-service inspection solutions. It is the closest direct competitor to Square Robot's on-stream tank inspection offering.
• MFE Inspection Solutions: MFE Inspection Solutions offers robotic crawlers and inspection tooling for storage tanks, piping, and pressure equipment. Its robotic tank inspection fleet competes with the SR-3 platform for the same operator customers.

Broad incumbents

• MISTRAS Group: MISTRAS is a global industrial NDT and asset integrity services provider serving oil & gas, petrochemical, and power customers. It is a broader incumbent whose robotic and conventional inspection offerings overlap with Square Robot's service lines.
• Oceaneering International: Oceaneering provides subsea robotics, asset integrity, and inspection services across energy and industrial markets. Its broader service portfolio and balance sheet position it as a large incumbent with adjacent capabilities to Square Robot's robotic inspection work.
• SGS: SGS is one of the world's largest testing, inspection, and certification (TIC) firms with extensive oil & gas and chemical inspection services. Its global scale and existing operator relationships make it a broad incumbent competitor for compliance-driven tank inspection work.
• Bureau Veritas: Bureau Veritas is a global TIC company offering industrial inspection, asset integrity, and certification services across energy and process industries. It competes with Square Robot for compliance inspection mandates from large operators.
• Intertek: Intertek provides testing, inspection, and certification services worldwide, including industrial and energy asset integrity work. Its scale, lab footprint, and enterprise relationships make it a broad incumbent peer for tank integrity work.
• Applus+: Applus+ is a global TIC provider serving the energy, petrochemical, and industrial markets with inspection and asset integrity services. It competes with Square Robot for compliance-driven industrial inspection programs.

Emerging players

• ANYbotics: ANYbotics develops autonomous four-legged robots for industrial plant inspection across oil & gas, power, and metals. It targets similar operator pain points (safer, more frequent inspection) but focuses on external plant assets rather than internal tank inspections.

Others

• Eddyfi Technologies: Eddyfi designs and manufactures advanced non-destructive testing (NDT) equipment, including ultrasonic and phased array systems used in tank and pressure equipment inspection. It is an enabling technology vendor adjacent to Square Robot's PAUT-based inspection workflow.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCpJpsuuriOZKJaVHXxXD4dw
• LinkedInlinkedin.com/company/square-robot-company
• Xx.com/squarerobots
• Facebookfacebook.com/squarerobots

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds3 records

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Square Robot