2. RapidDirect

RapidDirect has been around since 2012 and operates one of the biggest FDM farms in Southern China. They serve over 10,000 clients across 80+ countries and hold ISO 9001:2015 certification. Their online quoting runs 24/7.

What sets them apart is how they bundle FDM with CNC machining and injection molding. You can get a full DFM review before committing to a print, which cuts failed parts by roughly 40%. Materials range from standard thermoplastics to engineering grades like Nylon 12 and Polycarbonate, plus flexible TPU (85A–95A).

Post-processing includes sanding, priming, painting, and vapor smoothing.

Typical pricing: $0.50–$2.00 per cm³ for standard ABS

3. Unionfab

Unionfab’s claim to fame is build size. At 2100 × 700 × 800 mm, they can print architectural models, automotive interior parts, and aerospace test fixtures in single pieces, something most providers cannot do. They run 800+ machines and produce over 30 million parts annually.

Founded in 2015 and based in Shanghai, Unionfab covers PLA, ABS, Nylon, PETG, and PC for FDM. Their online portal lets you track print status, shipping progress, and quality inspection results in real time. Online quoting runs 24/7.

Lead time: 1–2 days · ABS: $0.40–$1.80 per cm³ · Discounts for orders over 500 parts

4. JLC3DP

JLC3DP is the 3D printing arm of the JLC ecosystem, one of China’s most recognizable online manufacturing platforms. Founded in 2011 and based in Shenzhen, they have 201–500 employees.

Their instant quoting system is the fastest on this list: upload a CAD file, get a price in seconds. Standard PLA starts around $0.15 per cm³. Build volume is 780 × 780 × 530 mm, smaller than Unionfab or RapidDirect, so they are not ideal for large industrial orders.

They serve hobbyists, startups, and small engineering teams with budget-conscious projects.

Online quoting: instant · Lead time: 2–3 days

5. HLH Proto

HLH Proto has been around since 2009, over 15 years in the game. They specialize in functional prototypes and low-volume production for automotive, aerospace, and medical device sectors. They are both ISO 9001 and ISO 13485 certified, the latter being medical device certification that most China-based FDM providers do not hold.

Based in Dongguan with 201–500 employees, their FDM service covers standard and engineering-grade thermoplastics. No online quoting: you email or call, and they typically respond within 24 hours. Slower than the automated systems, but their engineering expertise and quality documentation make up for it.

Lead time: 1–3 days · $0.60–$2.50 per cm³, varying by material and certification requirements

6. WayKen

WayKen positions itself as a rapid prototyping and low-volume manufacturing partner, not just a 3D printing shop. Founded in 2013 and based in Shenzhen, they offer FDM alongside CNC machining, vacuum casting, and sheet metal fabrication.

Their FDM service is not the cheapest here, but they compensate with strong engineering support: design reviews and DFM feedback are available before you place an order. No online quoting system.

Lead time: 2–4 days · $0.70–$3.00 per cm³ (higher due to bundled engineering support)

7. 3ERP

3ERP takes a hands-on approach. Founded in 2010 and based in Shenzhen, they have 51–200 employees. Instead of a support ticket system, you speak directly with engineers. Their FDM service covers PLA, ABS, Nylon, and PC.

Lead times are longer than RapidDirect or Unionfab, but 3ERP makes up for it with rigorous quality inspection. Every part gets dimensional verification before shipping, and measurement reports come with each order.

No online quoting · Lead time: 3–5 days · $0.55–$2.20 per cm³

8. Wenext

Wenext is mid-size with a focus on FDM and MJF printing. Founded in 2014 and based in Shenzhen, they have 201–500 employees. They serve consumer electronics, automotive, and healthcare industries and hold ISO 9001 certification.

Their FDM build volume of 1650 × 760 × 580 mm is larger than most competitors except Unionfab, making them suitable for medium-to-large parts. Online quoting handles standard FDM orders; complex geometries require manual review.

Lead time: 2–3 days · ABS: $0.45–$1.90 per cm³

9. Protolabs

Protolabs is a US-based company (now part of Xometry) with several facilities in China. Founded in 1995, they started China operations in 2010 and have 501–1000 employees across multiple facilities in Shanghai and Guangdong.

They are the most recognizable brand on this list and the default choice for Western engineering teams already using Protolabs in North America or Europe. One global provider simplifies procurement, invoicing, and compliance.

Their FDM service costs 20–40% more than comparable Chinese providers, but you get consistent quality, English-language support, and lead times that do not waver during Chinese holidays.

Online quoting available · Lead time: 1–2 days · ABS: $1.00–$4.00 per cm³ (premium pricing)

10. Shenzhen JR Technology

Shenzhen JR Technology is a smaller, specialized shop focused on industrial applications. Founded in 2016 and based in Shenzhen, they have 11–50 employees. They serve aerospace, automotive, and electronics sectors with functional prototypes and low-volume runs.

Their FDM service covers a wide material range, including PEEK and PEI for high-temperature applications, materials most providers will not touch. Being smaller means more flexibility on custom material requests and non-standard post-processing. No online quoting system, and response times vary by workload.

Lead time: 2–5 days · $0.80–$5.00 per cm³ (PEEK and specialty materials command premium pricing)