Agalma Sourcing

Contract assembly and box build companies in Celaya, Mexico

Plants that assemble finished products from your parts and subassemblies: box build, electromechanical assembly, kitting, and packout. Profiles say whether they buy the parts (turnkey) or use yours (consigned). We list 25 contract assembly manufacturers in Celaya. 1 have researched profiles with capabilities quoted from their own websites, and 11 are confirmed to take outside orders.

Describe your part to rank these suppliers for your job:

Top 25 of 25

Researched profiles first, then by size · Updated October 15, 2026

  1. Coplainsa

    Celaya, Guanajuato·101–250 employees·Contract manufacturer

    • ✓Final assembly and box build
    • ✓ISO 9001

    “Contamos con líneas de ensamble flexibles, tanto a pie de maquina como fuera de máquina”

    coplainsa.comTakes outside ordersProfile →
  2. Empresas Suarez

    Celaya, Guanajuato·251+ employees·Industrial supplier

    • ~Final assembly and box build
    • ~Electromechanical assembly
    • ✓ISO 9001
    warson.comTakes outside ordersProfile →
  3. Metalfrio Solutions Mexico

    Celaya, Guanajuato·251+ employees·Job shop

    • ~Final assembly and box build
    • ~Electromechanical assembly
    metalfrio.com.mxTakes outside ordersProfile →
  4. Celay

    Celaya, Guanajuato·251+ employees·Job shop

    • ~Electromechanical assembly
    elay.comTakes outside ordersProfile →
  5. Coroplast Cable Trading

    Celaya, Guanajuato·251+ employees·Contract manufacturer

    • ~Electromechanical assembly
    wewire-harness.comTakes outside ordersProfile →
  6. Construcciones Electromecanicas Diprozeza

    Celaya, Guanajuato·101–250 employees·Job shop

    • ~Final assembly and box build
    diprozeza.comTakes outside ordersProfile →
  7. RC Tools

    Celaya, Guanajuato·101–250 employees·Job shop

    • ~Final assembly and box build
    • ~Electromechanical assembly
    • ✓ISO 9001
    rctools.com.mxTakes outside ordersProfile →
  8. Rotomex

    Celaya, Guanajuato·51–100 employees·Job shop

    • ~Final assembly and box build
    rotomex.com.mxTakes outside ordersProfile →
  9. Kin-rod

    Celaya, Guanajuato·11–30 employees·Job shop

    • ~Final assembly and box build
    • ~Electromechanical assembly
    kin-rod.comTakes outside ordersProfile →
  10. Aplitecno

    Celaya, Guanajuato·11–30 employees·Job shop

    • ~Final assembly and box build
    • ~Electromechanical assembly
    aplitecno.comTakes outside ordersProfile →
  11. Bombas Verticales BNJ

    Celaya, Guanajuato·11–30 employees·Job shop

    • ~Final assembly and box build
    • ~Electromechanical assembly
    • ✓ISO 9001
    bombasbnj.comTakes outside ordersProfile →
  12. Pintura Estampado y MontajeNot yet researched

    Celaya, Guanajuato·251+ employees·Manufacture of motor vehicle bodies and trailers

    • ~Final assembly and box build
    cieautomotive.comProfile →
  13. Speqtrum AerospaceNot yet researched

    Celaya, Guanajuato·101–250 employees·Aerospace equipment manufacturing

    • ~Final assembly and box build
    Profile →
  14. Carrocerias Diversas HalconNot yet researched

    Celaya, Guanajuato·101–250 employees·Manufacture of motor vehicle bodies and trailers

    • ~Final assembly and box build
    Profile →
  15. Grupo Kasoku IndustrialNot yet researched

    Celaya, Guanajuato·51–100 employees·Manufacture of motor vehicle bodies and trailers

    • ~Final assembly and box build
    Profile →
  16. SemicNot yet researched

    Celaya, Guanajuato·31–50 employees·Material Handling Equipment Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    semic.comProfile →
  17. Industrias Electricas A4Not yet researched

    Celaya, Guanajuato·31–50 employees·Manufacture of electric power distribution equipment

    • ~Final assembly and box build
    • ~Electromechanical assembly
    Profile →
  18. Tierra Tech de Mexico

    Celaya, Guanajuato·31–50 employees·Industrial supplier

    • ~Final assembly and box build
    tierratech.comProfile →
  19. Biotecnica del BajioNot yet researched

    Celaya, Guanajuato·11–30 employees·Manufacture of other general-purpose industrial machinery and equipment

    • ~Final assembly and box build
    lumistell.com.mxProfile →
  20. Mecanica Aplicada en DiseñoNot yet researched

    Celaya, Guanajuato·11–30 employees·Metalworking Machinery Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    Profile →
  21. FOX NOX Ingenieria en Aplicacion en MetalesNot yet researched

    Celaya, Guanajuato·11–30 employees·Metalworking Machinery Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    Profile →
  22. Conveyors Immsa MexicoNot yet researched

    Celaya, Guanajuato·11–30 employees·Metalworking Machinery Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    Profile →
  23. FastenalNot yet researched

    Celaya, Guanajuato·11–30 employees·Other Manufacturing Industry Machinery Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    Profile →
  24. Esypro Ingenieria de ProcesosNot yet researched

    Celaya, Guanajuato·11–30 employees·Material Handling Equipment Manufacturing

    • ~Final assembly and box build
    • ~Electromechanical assembly
    esypro.comProfile →
  25. Harris Manufacturing SolutionsNot yet researched

    Celaya, Guanajuato·11–30 employees·Aerospace equipment manufacturing

    • ~Final assembly and box build
    Profile →