Callidus Technologies

What Callidus Technologies does

Callidus Technologies is an industrial combustion equipment manufacturer operating as a wholly-owned product line within Honeywell UOP, a division of Honeywell International Inc. (NYSE: HON). Founded in 1989 and headquartered in Tulsa, Oklahoma, the company designs and produces Low NOx process burners, smokeless flare systems, and custom thermal oxidizers for enterprise customers in refining, petrochemical, and gas processing. Products are marketed under the registered Callidus® brand and distributed globally through Honeywell UOP's established industrial equipment and aftermarket service network, with stated reach across the global refining, petrochemical, and gas processing customer base.

The core technology portfolio centers on environmental combustion: proprietary Low NOx process burners engineered for accuracy and precision in emissions-constrained applications, cost-efficient smokeless flare technology for safe gas disposal, and customizable thermal oxidizers for destroying VOCs and hazardous air pollutants. The flagship Callidus Ultra-Blue Burner System extends the portfolio into renewable energy and net-zero operations with dramatically lower NOx emissions. Callidus operates as a mechanical/chemical engineering OEM rather than a software- or data-driven platform; no AI/ML, API, or SDK capabilities are disclosed.

Revenue is generated through two streams: one-time equipment sales of burners, flares, and thermal oxidizers, plus an aftermarket parts and services business tied to the installed base. Pricing is custom and quote-based, structured under multi-year contracts, with no public pricing tiers. The go-to-market is enterprise B2B field sales, supported by phone and online request forms, plus demand generation through LinkedIn and on-demand webinars, and distribution via Honeywell UOP's global channel. Target customers are enterprise-level refiners, petrochemical producers, and gas plants, with renewable fuels positioned as a secondary use case.

Name

Callidus Technologies

Legal name

Honeywell International Inc.

Website

https://callidus.com

Company type

Public

Founded year

1989

Operating status

Operating

Headcount range

251–500 employees

Short description

Callidus Technologies is a Tulsa-based industrial combustion equipment manufacturer operating as a product line under Honeywell UOP, producing Low NOx burners, smokeless flares, and thermal oxidizers for enterprise refiners, petrochemical producers, and gas plants worldwide.

Ownership category

akta.pro rank

Product category

Industrial Combustion Equipment

NAICS

Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Power Plant Retrofit, Life Extension & Environmental Controls EPC (FGD/SCR/ESP) (EUAEAAAO)

akta.pro secondary industries

Solvent/Sorbent/Catalyst Materials & Capture Equipment Manufacturing (Absorbers, Strippers, Heat Exchangers) (EUAAALAJ), Biofuel Plant EPC, O&M & Process Technology Providers (EUAAAHAK)

Keywords

• Industrial combustion equipment
• Low NOx burners
• Thermal oxidizers
• Flare systems
• Emission control solutions

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Equipment Sales: Sale of combustion equipment including burners, flares, and thermal oxidizers to industrial customers in refining, petrochemical, and gas processing sectors
2. Aftermarket Parts and Services: Replacement parts and support services for existing Callidus combustion equipment installations

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Callidus Technologies designs, manufactures, and services industrial combustion equipment — including low NOx process burners, smokeless flare systems, custom thermal oxidizers, and the Ultra-Blue burner system — for refiners, petrochemical producers, and gas plants. The product line is supported by an aftermarket parts and service offering for installed equipment.

Product overview

Callidus Technologies is a product line under Honeywell UOP offering a portfolio of combustion equipment for industrial applications. The portfolio consists of Callidus® Burners (Low NOx process burners), Callidus® Flares (smokeless flare technology), and Callidus® Thermal Oxidizers (custom incinerator solutions), supported by Callidus Aftermarket Parts and services. The product line serves refiners, petrochemical producers, and gas plants with efficient, reliable, and environmentally-sound burner and flare systems. The flagship Callidus Ultra-Blue Burner System targets reduced NOx emissions for renewable energy and net-zero operations.

Differentiator

Problem solved

Functional benefit

Brands

• Callidus® Burners: Low NOx process burners for industrial combustion applications
• Callidus® Flares
• Callidus® Thermal Oxidizers
• Callidus Aftermarket Parts

Products and services

• Callidus Burners

Quantifiable outcome

• Dramatically lower nitric oxide (NOx) emissions with Callidus Ultra-Blue Burner system

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Direct peers

• John Zink (Koch-Glitsch): John Zink is the closest direct competitor to Callidus, offering industrial burners, flare systems, and thermal oxidizers to refining, petrochemical, and gas processing customers globally — overlapping core product lines and customer segments.
• ZEECO: ZEECO manufactures combustion equipment including process burners, flares, and thermal oxidizers for the hydrocarbon processing industry — a head-to-head competitor in the same product categories and verticals Callidus serves.
• Maxon (a Honeywell business): Maxon, also owned by Honeywell, produces industrial burners and combustion systems for process heating applications — a sister brand within the same parent and a direct competitive overlap with Callidus's burner portfolio.
• Hamworthy Combustion: Hamworthy designs and manufactures combustion equipment for marine and industrial markets, including process burners and environmental combustion solutions — closely comparable technology and end-markets.
• Eclipse Combustion: Eclipse Combustion is a direct manufacturer of industrial burners and combustion equipment for process industries — overlapping product portfolio with Callidus burners in similar industrial applications.

Broad incumbents

• Babcock & Wilcox: Babcock & Wilcox is a broad industrial incumbent supplying boilers, emissions control, and combustion technology across power and process industries — overlapping with Callidus's thermal oxidizer and burner offerings, though across a wider portfolio.
• Cleaver-Brooks: Cleaver-Brooks manufactures boiler systems and integrated burner packages for industrial and commercial heating — a broader incumbent with overlapping burner technology and emissions-control capability.
• Dürr AG: Dürr's Environmental Technology division supplies VOC abatement, thermal oxidizers, and industrial process equipment — overlapping with Callidus's thermal oxidizer and emissions-control solutions in industrial process markets.

Emerging players

• CECO Environmental: CECO Environmental provides industrial air-quality and emissions-control solutions, including thermal oxidizers — overlapping with Callidus's emissions-control and VOC destruction capabilities, with a more focused environmental services positioning.
• Fives Group: Fives supplies industrial process equipment including combustion systems for energy and process industries — an adjacent player with partially overlapping burner and thermal process technology to Callidus.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/user/honeywell
• Facebookfacebook.com/honeywell
• LinkedInlinkedin.com/company/uop-callidus
• Instagraminstagram.com/honeywell

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

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 Callidus Technologies