Alpha Diagnostic International

What Alpha Diagnostic International does

Alpha Diagnostic International (Alpha Diagnostic Intl. Inc.) is a privately held life science reagent manufacturer headquartered in San Antonio, Texas, operating since approximately 1996. The company produces and sells custom peptides, custom antibodies, primary and secondary antibodies, ELISA kits, recombinant proteins, IHC/ICC slides, lysates, rapid diagnostic tests (TruStrip), and other immunoassay reagents to research scientists across infectious disease, vaccine development, therapeutic antibody/biosimilar characterization, neuroscience, veterinary, and serum protein research applications. Its catalog exceeds 10,000 products spanning antigens from Adenovirus to Zika Virus, with proprietary specialty offerings such as VacciGel Direct ELISA for Hepatitis B vaccine potency testing and multi-system recombinant protein production (E. coli, yeast, Pichia pastoris, CHO cells).

The company's underlying technology stack is rooted in classical immunoassay formats — ELISA, Western blot, immunohistochemistry/immunocytochemistry, lateral flow assay, and immunoprecipitation — rather than next-generation sequencing, AI-driven discovery, or single-molecule platforms. Core differentiating capabilities include custom peptide synthesis and custom antibody production (42 custom offerings), validated species cross-reactivity data, and proprietary rapid test products under the TruStrip brand.

Revenue is generated through one-time product sales via a direct e-commerce storefront (4adi.com) and an international distributor network. Products are priced on a unit basis (e.g., $250-$8,100 per kit) with pay-as-you-go billing, pre-payment required, and quotes available on request. The company targets infectious disease and vaccine researchers, pharmaceutical and biotech companies developing therapeutic antibodies and biosimilars, and veterinary researchers. The firm is small (11-50 employees), privately held with no disclosed funding, parent company, or acquisition history, and appears to be founder- or family-owned.

Name

Alpha Diagnostic International

Legal name

Alpha Diagnostic Intl. Inc.

Website

https://4adi.com

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

11–50 employees

Short description

Alpha Diagnostic International is a privately held San Antonio, Texas manufacturer of custom peptides, antibodies, ELISA kits, and immunoassay reagents, serving life science researchers in infectious disease, vaccine, therapeutic antibody, and veterinary applications via direct e-commerce and global distributors.

Ownership category

akta.pro rank

Product category

Life Science Research Reagents

NAICS

In-Vitro Diagnostic Substance Manufacturing (325413)

SIC

In Vitro & In Vivo Diagnostic Substances (2835)

akta.pro primary industry

Reagents, Chemicals & Assay Kits (Buffers, Antibodies, ELISA, Enzymes) (HLAGAIAI)

akta.pro secondary industries

Immunoassay Diagnostics (ELISA, chemiluminescence, serology) (HLAAALAB), Biomarker Assay & Reagent Development (LDT/IVD assay design, antibodies/standards/controls) (HLAAAMAL), Veterinary Vaccines (Biologics) (HLAMAEAL)

Keywords

• Antibody reagents
• ELISA kits
• Custom peptide synthesis
• Immunoassay reagents
• Diagnostic kits

Headquarters

HQ city

San Antonio

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Product Sales: Sale of diagnostic reagents, antibodies, ELISA kits, proteins, and related laboratory products to research institutions and pharmaceutical companies

Pricing tiers

Distribution channels2 records

Marketing channels3 records

Core offering

Alpha Diagnostic International manufactures and sells a catalog of immunoassay reagents for life science research, including over 6,168 primary antibodies, 743 secondary antibodies, and 653 ELISA kits, alongside custom peptide synthesis and custom antibody production services. The product portfolio spans applications in infectious disease and vaccine research, therapeutic monoclonal antibody and biosimilar characterization, veterinary vaccine research, neuroscience, and serum protein analysis, with proprietary offerings such as TruStrip rapid tests and VacciGel Direct ELISA kits.

Product overview

Alpha Diagnostic International operates as a single unified brand offering a comprehensive portfolio of laboratory research reagents and diagnostic products. The core product lines include custom peptide and antibody services alongside an extensive catalog of 6,168 primary antibodies, 743 secondary antibodies, and 653 ELISA kits spanning infectious disease research, vaccine development, and therapeutic antibody analysis. Key product families include specialized ELISA reagents for Hepatitis B and Coronavirus research, TruStrip rapid tests, neuroscience research tools, and serum protein reagents. The company's offerings serve the life science research community with products for ELISA, Western blot, immunohistochemistry, immunocytochemistry, and immunoprecipitation applications.

Differentiator

Problem solved

Functional benefit

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators6 records

Recent moves4 records

Expansion highlights3 records

Direct peers

• Abcam: Now owned by Danaher, Abcam is the largest independent antibody and immunoassay reagent catalog supplier to life-science researchers globally, directly competing with ADI's primary/secondary antibody and ELISA kit offerings.
• Santa Cruz Biotechnology: Privately held supplier of research antibodies, ELISA kits, and biochemical reagents with a broad catalog across species and applications - closely comparable scale and product breadth to ADI's catalog.
• R&D Systems (Bio-Techne): Bio-Techne's R&D Systems brand sells ELISA kits, antibodies, and proteins for immunology and infectious disease research - directly overlapping with ADI's therapeutic mAb/biosimilar assay and infectious disease ELISA lines.
• Cell Signaling Technology: Premium antibody and immunoassay reagent supplier specializing in signaling pathway and disease-area research - competes head-to-head with ADI for grant-funded research antibody budgets.
• GenScript: Major custom peptide and antibody service provider plus catalog reagents, directly competing with ADI's custom peptide/antibody services and recombinant protein offerings (E. coli, yeast, CHO expression).
• MyBioSource: Online research reagent catalog with deep ELISA kit and antibody selection spanning veterinary and infectious-disease assays - highly comparable catalog-driven B2B distribution model to ADI.
• Bethyl Laboratories: Specialty antibody manufacturer (now part of Fortis Life Sciences) producing custom and catalog polyclonal antibodies for research, with similar custom-services-plus-catalog positioning to ADI.
• Jackson ImmunoResearch: Long-established secondary antibody and immunoreagent specialist serving life-science research labs - directly comparable as a niche, catalog-focused antibody/immunoassay reagent supplier.

Broad incumbents

• Bio-Rad Laboratories: Established life-science tools company offering Bio-Plex immunoassays, ELISA kits, and a broad antibody portfolio; competes with ADI in ELISA and infectious-disease serology while operating a much wider instruments-and-diagnostics portfolio.
• Thermo Fisher Scientific (Invitrogen/eBioscience): World's largest life-science tools supplier with Invitrogen/eBioscience antibody and ELISA kits directly overlapping ADI's catalog, alongside far broader instrumentation, consumables, and services.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/AlphaDiagnosticIntl
• Xx.com/4aditx
• LinkedInlinkedin.com/company/alpha-diagnostics

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 Alpha Diagnostic International