The fair starting point
Each of them does real work.
Writer and Jasper offer brand voice and governance, and both are moving fast into agents and automation. General assistants like ChatGPT, Claude, Copilot and Gemini are capable, and already sit inside the software your teams use.
Pressmaster produces PR and thought leadership at pace. And teams that build their own, with custom GPTs and internal agents, get something shaped to them.
What sets them apart from Arcroyd is where your brand lives. In each of them, it lives inside the tool – as a profile, a set of samples or a prompt someone maintains – and it stays there.
Arcroyd is built the other way round. Your brand's language is designed as a complete system you own, then encoded into an environment built and run for your brand alone.
Side by side
The differences that decide it.
Arcroyd
General AI assistants
All of it: meaning, voice, narrative, vocabulary, conventions, governance and every content type
Whatever is in the files and instructions you add – read as reference, with nothing holding the AI to them
Every format you make, structured in full and built in
None built in – you write and keep your own saved instructions, skills or Gems
The whole system, designed by our Brand Language Architects®. Shown as an interactive reference beside the app
The instructions and files
You, held outside any tool
You, as whatever you've added
One environment, one brand
Shared platform
Custom built for you by Rule of Three
You
Rule of Three, within the licence
You
Landscape as at October 2026. Based on publicly available product information.
What follows
One difference. Three consequences.
Designed and shown.
Arcroyd works from a complete language system, designed by our Brand Language Architects® and shown to your team in full. A voice profile holds part of a brand. This holds all of it.
Owned by you.
Your Brand Language System is documented and held outside any tool. In most platforms, your brand's definition stays with the vendor if you leave. With Arcroyd, it moves with you.
Run for you.
Arcroyd is custom built, run and kept current by Rule of Three, in an environment for your brand alone. Your team gets on with the work, without another tool to maintain.
Different jobs
Not every alternative does the same job.
General assistants help people think, research and draft across everything they do. They sit well alongside Arcroyd: one helps your team understand, the other produces your brand's content.
Pressmaster is built for founder-led PR and thought leadership. Writer and Jasper are the nearest peers, platforms for brand content at scale, and it's there that depth, ownership and the operated environment matter most.
Building your own can work well at first. Over time, instructions drift, the person who built it moves on, and keeping it current falls to a team with a day job.
Start with the brand.
Build the AI from it.