Callidus Technologies
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.
- Company typePublic
- Founded1989
- HeadquartersTulsa, United States
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
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.
Callidus Technologies firmographics
Firmographics- 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
Callidus Technologies industry classification
Industry- 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
Where Callidus Technologies is headquartered
LocationHeadquarters
- HQ city
- Tulsa
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Callidus Technologies business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Equipment Sales: Sale of combustion equipment including burners, flares, and thermal oxidizers to industrial customers in refining, petrochemical, and gas processing sectors
- Aftermarket Parts and Services: Replacement parts and support services for existing Callidus combustion equipment installations
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom quote-based pricing for industrial combustion equipment |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels2 records
Callidus Technologies product offering
Product offeringCore 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
Companies that use Callidus Technologies
Customer profileNamed customers3 records
Segments4 records
Ideal customer profiles4 records
Callidus Technologies technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Callidus Technologies partnerships and signals
Strategic signalScale indicators1 record
Recent moves5 records
Expansion highlights5 records
Callidus Technologies competitors and assessment
Company assessmentDirect 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
Callidus Technologies social profiles
Digital presenceCallidus Technologies financial estimates
Financial estimateRevenue estimate
Valuation estimate
Callidus Technologies leadership team
Management profileNumber of profiles
Callidus Technologies funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Callidus Technologies M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Callidus Technologies
What does Callidus Technologies do?
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.
Is Callidus Technologies a public or private company?
Callidus Technologies is a public company. It is classified as corporate owned and is currently operating.
When was Callidus Technologies founded?
Callidus Technologies was founded in 1989. It employs 251 to 500 people.
Where is Callidus Technologies based?
Callidus Technologies is headquartered in Tulsa, United States, in the North America region.
How does Callidus Technologies make money?
Two revenue lines are on record. Equipment Sales are the primary driver. The others are aftermarket Parts and Services.
Who are Callidus Technologies's main competitors?
Direct peers on record are John Zink (Koch-Glitsch), ZEECO, Maxon (a Honeywell business), Hamworthy Combustion and Eclipse Combustion. Broad incumbents are Babcock & Wilcox, Cleaver-Brooks and Dürr AG. Emerging players are CECO Environmental and Fives Group.
Does Callidus Technologies have an API?
No public API is recorded for Callidus Technologies.
What industry is Callidus Technologies in?
Callidus Technologies's product category is Industrial Combustion Equipment. Its primary akta.pro industry code is EUAEAAAO, Power Plant Retrofit, Life Extension & Environmental Controls EPC (FGD/SCR/ESP), with a secondary code of EUAAALAJ, Solvent/Sorbent/Catalyst Materials & Capture Equipment Manufacturing (Absorbers, Strippers, Heat Exchangers). Its NAICS code is 333414 and its SIC code is 3433.