Unionfab is China's largest 3D Printing Manufacturing Company for Rapid Prototyping and On-Demand Production Parts. We have over 400 industrial-grade 3D printing equipment for SLM, SLS, MJF, FDM, DLP, PolyJet, CNC, Rapid, Vacuum and Investment Casting, etc. We operate Five Mega-Scale Production factories in Shanghai, Jiangsu, Guangdong, Zhejiang and Anhui in China. We provide parts manufacturing services from 1 to 100,000 pieces, helping customers achieve one-stop service from design, rapid prototyping, and direct digital manufacturing.In addition, the Unionfab online platform is networked to hundreds of manufacturing 3D printers. We provide parts manufacturing services from 1 to 100,000 pieces, helping customers achieve one-stop service from design, rapid prototyping, and direct digital manufacturing.In addition, the Unionfab online platform is networked to hundreds of manufacturing 3D printers. As a result, it guarantees fast lead times while offering a broad array of capabilities such as order management, customization, quoting, AI process, etc. Unionfab buyers range from small start-ups to Fortune 100 companies.
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Is Unionfab legit?
Unionfab (unionfab.com) has a 4.6 out of 5 rating on OK.one, based on 26 user reviews collected here. It is listed under Construction & Manufacturing and its reputation is excellent. 89% of reviews are 4 stars or higher and 0% are 1 star; The business has replied to 100% of negative reviews; 3 of them were added in the last 12 months. Last updated 2026-10-24.
I used Unionfab's 3D printing service once. The print itself was a one-time transaction, but their marketing emails have continued ever since.
I have tried unsubscribing repeatedly, yet I continue to receive offers and promotional/news emails. In my experience, the unsubscribe process has simply not been respected.
For that reason alone, I would not do business with Unionfab again, and I cannot recommend them to others. Unless you enjoy receiving marketing emails indefinitely after placing a single order, I would suggest looking elsewhere for 3D printing and CNC services.
A company should respect its customers' unsubscribe requests. Mine have not been.
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Edit: I am glad that Unionfab has now responded and is taking the issue seriously.
However, I am disappointed that it apparently took a public Trustpilot review before they reacted. Before posting this review, I had contacted them several times about the unwanted marketing emails, but those messages were ignored and the emails continued.
I therefore appreciate their response, but I do not feel there is any reason to change my rating.
Reply from Unionfab2026-09-07
Dear Martin,
We’re truly sorry for this experience, and we sincerely apologize that your unsubscribe request was not respected.
We have confirmed that you had requested to unsubscribe after receiving our marketing email. Although your request was successfully processed in our new system, the unsubscribe status was not properly synchronized between our new and legacy systems, which meant that your email address remained on a subsequent marketing mailing list. We understand how frustrating this must have been, especially after you had already made your request clear.
We have now confirmed that you will no longer receive marketing emails from Unionfab. At the same time, our product and technical teams are investigating the issue and working on a permanent solution to prevent this from happening again.
We know that an apology alone does not undo the frustration this caused. We take your feedback seriously and will update you as soon as we have confirmed the solution.
We’re truly sorry that we let you down, and we hope we can have the opportunity to earn back your trust in the future.
Best regards,
Unionfab Team
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Update (from our CEO, Allen Yang):
Dear Martin,
Following up on our previous response, our CEO, Allen Yang, has personally reviewed this issue and emailed you a formal apology.
You were entirely right to be frustrated that your earlier private requests went unanswered. Our internal review confirmed two breakdowns on our side: our team failed to reply and confirm receipt of your emails, and a database sync glitch during a system migration caused automated marketing sequences to continue.
We have fully resolved this issue:
1. Fixed the database sync bug and permanently purged outdated mailing lists.
2. Manually verified that your address is permanently suppressed from all marketing channels.
3. Updated our customer support SOP: every suppression request now requires mandatory written confirmation to the customer and direct system verification before closing.
Thank you for holding us accountable—your feedback directly drove these permanent system and workflow improvements.
Best regards,
Allen Yang & The Unionfab Team
I am on my fifth order with this company. I have had many bad experiences with other 3D Printers. I had my first stainless steel piece printed. Saved a mold charge and sped up my project by 3 weeks. Amazing people, service and products.
The company produced the correct materials in a high quality-precision manufactured and in a large quantity with amazing consistency. Above those facts, they provided timely updates and communicated along the way.
We will use Unionfab in the future and recommend them to other companies too!
- Joel (PAWS Founder)
Reply from Unionfab2025-11-13
We’re thrilled to hear that you were satisfied with our product quality, consistency, and communication throughout the process.
It was a pleasure working with PAWS, and we truly appreciate your trust in Unionfab.
We look forward to collaborating with you again in the future!
It was almost perfect and, didn't have any issues on products. It was absolutely perfect if I can use OCS express to ship to Japan because their airfare cost is quite reasonable(cheap ship to Japan)
Fast printing time (items were printed in the 3 day time given) and delivery was quick to Australia. Model Railway parts printed and results were excellent and great value.
The price of my 3d print was very competitive. Arrived about 10 days after submitting the 3d file (from China). The prints were high detail resin, and I'm very satisfied with the quality. Will definitely have them print more in the near future. Sent via UPS with tracking.
I placed my order three weeks ago through Craftcloud thinking I would have it about a week later. Their techs were very helpful in advising problematic parts of my print that I was able to fix with their guidance, and production was only set back a few days. All fine.
That is where my good experience ended. My package went missing for whatever reason, and they were very slow to give me any updates--only responding to one of my queries. I was last told they were reprinting my order, and have not heard any updates since despite multiple attempts to reach out.
Be very wary of ordering with them if you have a tight deadline, as the window for me needing these parts is closing rapidly and I am regretting my decision to choose Unionfab.
Reply from Unionfab2023-06-16
Hi Britt, thanks for your review of our service. Please note that your order was placed through a 3rd party website where order management is relayed to them. We are very sorry to note your package got lost. We did contact the shipping courier to request a refund. We duly informed the 3rd party website to communicate with you. We do apologise for any inconvenience caused and hope you can try to order from us directly next time if given the chance.
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