Find Verified Custom Manufacturing Companies Online
Haizol is an online marketplace for discovering and comparing custom manufacturing companies in China. Since 2015, we've built a network of 800,000+ listed factories across processes and industries, from CNC machining and casting to sheet metal fabrication and injection molding. Browse manufacturers by what they make, how they make it, or the industry they serve.
Your Gateway to Reliable Custom Manufacturing Suppliers
- Compare Verified Suppliers
- Get Access to Detailed Factory Profiles
- Exclusive Factory Visits & Sourcing Tours
Find Custom Manufacturing Companies Online
Haizol connects businesses online with verified custom manufacturing companies across China, covering CNC machining, casting, molding, fabrication, forging, stamping, tooling, assembly, and other categories. Each factory profile on Haizol shows materials, tolerances, certifications, and lead times, so you can evaluate suppliers before submitting an RFQ.
Sourcing a factory in China tends to raise the same worries, no matter what you're ordering:
• Is this supplier a real factory, or a trading company forwarding your drawings to someone else?
• Why did five shops quote five different prices for the identical part?
• Why won't anyone quote a 20-piece order?
• Is a 3D file enough to get an accurate quote, or does the factory need a fully toleranced drawing?
These worries share a common root: quality control varies by factory, pricing is hard to compare without matching RFQs sent to multiple suppliers at once, and low-volume orders get deprioritized by shops chasing bigger runs.
Haizol is built around closing that gap.
Before a factory can quote on Haizol, its business license, production equipment, and quality systems go through verification, so legitimacy is already settled by the time you're comparing suppliers. From there, a single RFQ submitted to Haizol goes out to multiple verified factories at once, and because 90% of RFQs come back with 8 or more competing quotes within 24 hours, you're comparing real prices against the same specification.
And since Haizol has no platform-wide minimum order quantity, that comparison works whether you need one prototype or a full production run.
Frequently Asked Questions
How do I find the right custom manufacturer for my part?
Start with what the part needs: material, process, tolerances, quantity, and required certifications. Then contact multiple custom manufacturing companies and compare their fit to your requirement. You can use Haizol to compare capability-matched suppliers' side by side using their factory profiles, which include equipment lists, certifications, and audit reports.
How do I know if a custom manufacturing company on Haizol is legitimate and will deliver good quality?
Look at business registration, certifications (ISO 9001, IATF 16949, AS9100, ISO 13485) with valid-until dates, and quality control equipment before committing. Each Haizol factory profile includes a verification audit report covering facility size, employee count, machine inventory, QC equipment, and certification validity dates, giving you a documented basis for comparison beyond the factory's own claims.
Why do quotes from different custom manufacturing companies vary for the same part?
Price differences reflect setup and programming time, tooling, material grade, quality control level, and how closely a factory's process matches your drawing. Unusually low quotes typically signal misread specifications or missing production steps. The fastest way to compare factory pricing is to submit an RFQ submission on Haizol and compare the quotes side-by-side. 90% of submitted RFQs receive 8+ competing quotes from custom manufacturing companies.
Does Haizol have a minimum order quantity (MOQ) for custom manufacturing?
There is no platform-wide minimum order quantity on Haizol. Individual factories on Haizol decide whether to quote based on part complexity, process, and volume, so prototype and single-unit orders can still receive quotes, and higher quantities attract more competitive pricing and more supplier interest.
What do I need to prepare before requesting a quote for custom parts on Haizol?
For an accurate, comparable quote, prepare your CAD files or drawings (STEP, IGES, DWG, or PDF), material specification, critical tolerances and surface finish, expected quantity, and any required certifications. RFQs submitted with complete specifications produce more accurate, comparable quotes within its 24-hour turnaround.
How do I know which Haizol manufacturing category fits my part?
Match the category to your part's primary production process. CNC machining suits precision-machined metal or plastic parts; sheet metal fabrication suits formed and welded components; plastic molding suits high-volume plastic parts; metal casting suits complex or heavy metal shapes; and stamping, forging, or rapid prototyping cover more specialized needs. Haizol's category pages group verified factories by process, so filtering by material and part type narrows the list further for parts spanning more than one process.
Can Haizol handle parts that need more than one manufacturing process?
Many parts need more than one process, for example a CNC-machined component that also needs finishing, or an injection-molded part with post-assembly work. Submit one RFQ to Haizol describing the full requirement. Factories quoting on Haizol are matched by full capability, so multi-process jobs are routed to suppliers equipped to handle every step.