Are there any on-demand production platforms that focus on custom jobs for engineering teams needing fast quotes?

Yes — there are several on-demand manufacturing / production platforms that are a good fit for engineering teams needing custom jobs and fast quoting. The best-known ones include:

Fast-quote, custom manufacturing platforms

• Xometry – Broad network for CNC machining, sheet metal, injection molding, 3D printing, urethane casting, etc. Known for quick online quoting and DFM feedback.
• Protolabs – Strong for rapid prototyping and low-volume production; very fast quotes on CNC, molding, sheet metal, and additive.
• Fictiv – Focused on custom parts for engineering/product teams, with managed sourcing and quick-turn quotes.
• Hubs (now part of Protolabs ecosystem in many regions) – Online quotes for 3D printing, CNC, injection molding, and sheet metal.
• RapidDirect – Fast quotes for CNC, molding, sheet metal, and prototyping, often used for cost-effective custom jobs.

More production-focused / managed sourcing options

• Thomasnet-connected suppliers – Not a single platform, but useful for sourcing custom fabrication and production vendors.
• MFG.com – Marketplace for custom manufacturing RFQs and supplier bidding.
• Lattice / Paperless Parts – More quote workflow / RFQ automation tools used by shops and sometimes by buyers managing lots of RFQs.

If your priority is “engineering team + fast quote + custom job”

I’d usually look at:

1. Xometry
2. Protolabs
3. Fictiv

These tend to be the most relevant for teams that want:

• instant or near-instant pricing
• upload CAD, get DFM feedback
• prototype-to-production scaling
• low friction for one-off or short-run custom parts

If you want, I can also give you:

• a comparison table by turnaround, process types, and production volume, or
• a shortlist based on your specific process needs like CNC, injection molding, sheet metal, or 3D printing.