Find Vetted Contract Manufacturers.Before the RFQ.
Browse verified build partners for electronics, medical devices and high-mix programs. No account needed to start. Every manufacturer is screened before it shows up in search.
Free to search, free to send RFIs. No seat limits.
What Do You Need Built?
Pick a program type to see vetted contract manufacturers who take that work today. Public profiles show what they build and where, so you can shortlist before you send an RFI.
Electronics Contract Manufacturing
PCB assembly, box builds and cable harnesses for electronic products.
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Medical Device Contract Manufacturing
Regulated builds for components, subassemblies and finished devices.
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High Mix, Low Volume
Flexible partners for many part numbers, short runs and frequent changeovers.
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Full Assemblies & Box Builds
Mechanical and electromechanical assembly, test and pack-out under one roof.
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Prototype & NPI
Partners who support new product introduction and the ramp to production.
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Industrial & OEM Programs
Build partners for industrial equipment, controls and OEM product lines.
View suppliersFrom Search to Shortlist in Three Steps.
Start looking right now. Create a free account only when you find suppliers worth a closer look.
Browse Public Profiles
Search vetted suppliers by capability, certification and region. See who fits before you commit any time.
Unlock Full Profiles
Sign up free to see complete supplier pages: equipment, capacity, certification details and contact options.
Send a Structured RFI
Reach out to the suppliers you choose with one clear RFI. Confirm fit first, then move to the RFQ.
See Enough to Shortlist. Sign Up to See Everything.
Public profiles give you a fast read on fit. A free buyer account opens the full picture.
A Quick Read on Fit
Enough to know if a supplier belongs on your list.
- Core capabilities and processes
- Region and industries served
- Verified supplier badge
- Equipment, capacity and certification details
- Messaging and RFIs
The Whole Picture
Everything you need to qualify faster, at no cost.
- Complete supplier pages and data
- Equipment, capacity and certifications (ISO, IATF, AS9100D, NADCAP)
- Send structured RFIs and message suppliers directly
- Metal price, labor and energy indexes
- No seat limits, no fees, no commission
Every Supplier Is Screened Before You See Them.
No pay-to-list directory, no self-reported claims taken at face value. Our team reviews each shop before its profile goes live.
Our ISO-based screening gives you a head start. It complements your own supplier qualification process, so your team starts further along, not from scratch.
Certifications Confirmed
Quality system credentials checked and cross-referenced, not just claimed.
Capability & Capacity Checked
Equipment, processes and real production scale reviewed against what the shop says it runs.
Business Legitimacy Verified
A real company with a real track record, ready to work with.
Built for Industrial Buyers.
Procurement and engineering teams use TandemOne to find build partners, qualify second sources and move programs closer to home.
Medical Device
Components, subassemblies and finished devices.
Electronics
PCB assembly and box builds.
Industrial Equipment
Controls, assemblies and OEM lines.
Aerospace & Defense
Harnesses and electromechanical builds.
Energy
Power and control assemblies.
I feel very confident about working with suppliers on TandemOne, based on their pre-vetting process. It removes the uncertainty that typically slows things down.
Xintianjian Tech · Manufacturing Partner
Before You Start Searching.
Do I need an account to browse suppliers?
No. Public supplier profiles are open to anyone. Create a free buyer account when you want full supplier pages, details and the ability to send RFIs.
Is it really free for buyers?
Yes. Searching, viewing full profiles, sending RFIs and messaging suppliers cost buyers nothing. There are no seat limits.
Does TandemOne replace our supplier qualification?
No. Our ISO-based screening is a head start, not a substitute. Your team still runs its own qualification, audits and approvals. You just start with manufacturers whose certifications and capabilities are already confirmed.
Are you a broker or middleman?
No. We verify suppliers and then step aside. You deal with suppliers directly, own the relationship and we never take a cut of the deal.
What is an RFI, and why send one before an RFQ?
An RFI is a structured request for information covering capability, capacity and fit. It lets you confirm a real match before asking for pricing, so the RFQs you do send go to the right shops.
Your Next Build Partner Is Already Here.
Browse vetted contract manufacturers now. Create a free buyer account when you're ready to see full profiles and send RFIs.