/ 1 min read Launching Q3 2026 ↳ visit protoparcel.com

ProtoParcel. UK-made parts on demand. Upload CAD. Receive parts.

A 3D print mail-order service. The price on upload is the price you pay. Single units to large batches, no minimum order, no quote-by-email loop. FDM, SLA, and CNC cutting under one roof, dispatched in days.

The problemUK print shops are quote-by-email by design. Two days for a quote, two more for a tweak, twenty-piece minimums. Offshore is cheaper but unpredictable: held at customs, shipping damage, no one accountable.
The disciplineThree commitments architectural, not aspirational: no quote-by-email · no minimum order quantity · UK end-to-end (filament, resin, machines, dispatch). The Python pipeline is the operator: quote, queue, print, QC, dispatch, comms.
The outputA part dispatched with its own job ticket. Process, material lot, parameters, QC pass. The customer can repeat-order an identical part without an engineer in the loop.
/03case study·ProtoParcel

↳ visit protoparcel.com

UK-made parts on demand. CAD in. Parts out.

A 3D print mail-order service. Upload your CAD file, we print and post. Single units to large batches, no minimum order, no quote-by-email loop. FDM, SLA, and CNC cutting under one roof, rapid dispatch. The price on upload is the price you pay.

0
minimum order quantity
single units and small batches are first-class
3
manufacturing processes under one roof
FDM · SLA · CNC cutting · one job, one dispatch
0
quote-by-email loops
the price you see on upload is the price you pay
UK
end-to-end supply chain
filament, resin, polymer · all UK-sourced, UK-printed, UK-posted
rapid
dispatch on stock-process jobs
most orders ship within the same week
100%
automated, CAD upload to dispatch
Python pipeline · job queuing, monitoring, QC, comms
/02the problem

Quote-by-email. Two-week wait. Twenty-piece minimums.

A founder, an engineer, a maker, or a small studio needs one part. They send a CAD file to a print shop. A quote comes back two days later. They reply with a tweak. Another two days. The price changes. The quantity demands a minimum order they don't need.

Offshore options are cheaper on the part but unpredictable on the calendar - dispatched from another continent, held at customs, arriving with shipping damage no one is accountable for. Post-COVID, supply chain fragility is the cost no quote captures.

Existing UK on-demand 3D print services are quote-by-email by design. The economics work for them when each job carries an account manager. They don't work for the customer with one part, two parts, or a hundred parts who needs the price the moment they upload.

ProtoParcel is built so the price on upload is the price you pay, single-unit jobs are first-class economics, and dispatch is days not weeks.

process coverage FDM · SLA · CNC cutting under one roof. Filament, resin, polymer, plywood, acrylic, MDF, sheet metal. Three manufacturing processes, one job ticket, one dispatch.
price discipline One price per upload. The number you see is the number you pay. No revised quotes. No surcharges. No minimum order quantity. The quote engine is the only path to a price.
/03the approach

Three layers. CAD upload to dispatch.

ProtoParcel is built in three layers, each automated end-to-end. No human touches the order between upload and dispatch unless something fails the QC layer. Every job carries its own ticket - process, material lot, parameters, QC pass.

layer 1

Quote & queue.

CAD upload triggers an instant quote against the chosen process and material. The quote is the price - not a starting estimate. On accept, the job is queued, scheduled, and assigned to a printer with the right material loaded. No quote written by hand. No price quoted by email.

layer 2

Print & verify.

Three processes under one roof: FDM (PLA, PETG, ABS, TPU, composites), SLA (resin), and CNC cutting (acrylic, plywood, MDF, sheet metal). Print parameters are computed from the geometry, not chosen by hand. The QC layer checks dimensional tolerance and finish before the part is packed.

layer 3

Pack & post.

Same-day dispatch on stock-process FDM and CNC jobs. Resin parts dispatch when cured. Each part ships with a job ticket - process, material lot, print parameters, dimensional check - so the customer can repeat-order an identical part without an engineer in the loop.

Python automates job queuing, order processing, machine monitoring, QC flagging, and customer comms. The pipeline is the operator. Hands stay on the parts.
/04proof of discipline

Three commitments. Operational, not aspirational.

These commitments are enforced by the order pipeline. Removing them means rewriting the system. They are how single-unit jobs stay economic, how prices stay honest, and how dispatch stays in days not weeks.

commitment 1

No quote-by-email.

The price on upload is the price the customer pays. No revised quotes. No surcharges for short notice. No "we'll get back to you in two days". The quote engine is the only path to a price - a human typing one is a bug, not a feature.

commitment 2

No minimum order quantity.

Single-unit jobs are first-class. The same per-part economics apply at quantity 1 and quantity 100. No "minimum 20 to make it worth our while". The automation is what makes single-unit jobs economic - it is built into the pipeline, not bolted on.

commitment 3

UK end-to-end.

Filament, resin, polymer, plywood, acrylic - all UK suppliers. All printing happens in the UK. All dispatch happens from the UK. No offshore intermediary, no customs held, no shipping uncertainty across continents. Materials, machines, and people are local.

Production discipline. Every job carries its own ticket - process, material lot, parameters, QC pass - so the customer always knows exactly how their part was made and can repeat the order without an engineer translating between them and the printer. The pipeline is the audit.

/05scale

Every part your bench throws at it.

Three processes, three classes of part. From a single prototype iteration to a small production run, the pipeline doesn't change. Material is chosen by load case and finish; process is chosen by geometry. The customer uploads a CAD file - the pipeline does the rest.

process & material

process
materials
FDM (filament)
PLA · PETG · ABS · TPU · carbon-fibre composites. Engineering-grade thermoplastics for functional parts.
SLA (resin)
Standard · tough · flexible · castable · ceramic-filled. High-resolution geometry, smooth finish.
CNC cutting
Acrylic · plywood · MDF · aluminium sheet · brass sheet. Flat-stock parts, enclosures, panels.

job ticket

field
recorded
Process
FDM / SLA / CNC chosen by geometry, finish, and load case.
Material
Material lot number recorded for traceability and repeat-order parity.
Parameters
Print speed, layer height, orientation, infill - all computed from geometry.
Tolerance
Dimensional target verified post-print before the part is packed.
Hash
SHA-256 fingerprint of the source CAD file - identical input means identical part.
repeat-order parity Every part ships with its job ticket. Repeat orders run identical because the parameters are recorded - not reconstructed from memory, not retyped from email, not approximated from a photo of the last part.
/06roadmap

Same pipeline. Three surfaces.

The on-demand engine is process-agnostic. Once a job goes from CAD to dispatch in a single pipeline, the same pipeline extends to the other places parts are needed - functional electronics, in-house production, on-demand for engineering teams.

phase 1

ProtoParcel.com - prototype-grade single units and small batches.

FDM and SLA online from day one. CNC cutting integrated by phase end. Open to consumer, maker, and small-business customers. Quote engine, job queue, machine monitoring, QC pipeline, and dispatch automated end-to-end.

phase 2

Multi-material printing.

Conductive traces and antenna elements printed directly into structural components. Ceramic-filled resin for thermal and RF applications. Multi-material extends the catalogue from passive plastic parts to functional electronics and high-performance composites.

phase 3

White-label and in-house production.

The same pipeline, packaged for engineering teams who need on-demand parts without standing up their own print shop. Dedicated production lines for partner ventures running on the same automation - the same job ticket, the same QC, the same dispatch discipline.

The price on upload is the price you pay.

↳ visit protoparcel.com