Doulix DNA plasmid visualisation

You do the discovery.
We do the DNA.

Cut development time, multiplex research and accelerate discovery with DNA synthesis you can rely on.

DNA Synthesis you can rely on

Custom DNA synthesis backed by powerful AI for optimisation and manufacture.

dsDNA Fragments

Linear, double stranded DNA fragments up to 2.5 kbp, optimised for assembly and with the lowest error rates in the industry.

Cloned Fragments

Custom fragments up to 7.5kbp, subcloned into the backbone of your choice and optimized for expression and assembly.

Custom Constructs

Large, complex plasmid assemblies up to 35kbp, optimized for expression and with turnaround from 25 days.

Design Less. Build more.

DNA Studio

Simplify your workflows with our free, browser-based bioCAD.

Easily design and validate hundreds of custom constructs with user friendly sequence editors and powerful tools for error correction and optimisation.

And build even more quickly with modular plasmid templates and a library of professional biomodules and constructs.

Try it free today.

Swap DNA bottlenecks for DNA pipelines

DNA studio

Work smarter with cloud-based tools to create, correct, validate, assemble, collaborate and track your constructs.

The Biofoundry

Pursue more ambitious research by outsourcing DNA demands to a partner you can rely on.

World Class Support

Enjoy dedicated support and expert advice from the most dogged team in DNA.


Cutting-edge synthesis services and world class support at prices to help you scale research with DNA.


Pre-purchase your DNA and save with the Doulix X-card while simplifying ordering for your whole lab.

Europe’s most pioneering labs trust us with their DNA

Doulix and Reithera
Doulix and Manchester University
Doulix and Cardiff University
Doulix and Biosustain
Doulix and Milan University

Doulix Talks

News, opinions and best practice advice from the team. 

Join Europe’s top researchers in driving faster discovery with DNA from Doulix.

See what your lab can do when you trust your DNA to Doulix. 

We’ll even back it with a guarantee… Put our synthesis and assembly to the test with the Doulix Quality Promise: a 100% functional product or your money back.

Sure, you can keep hoping the competition wont reject those sequence repeats. Or you can challenge us with your toughest request for none of the risk.